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TG700 TV Signal Generator Platform Service Manual

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1. R751B R657A R651B R651A R656A R751A Figure 6 2 Location of the variable resistors for the output offset and gain adjustment Procedure WARNING To avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use the 75 Q BNC cable BNC T connector 75 coaxial termination and BNC female to dual banana adapter to connect the upper CH 1 connector on the AWVG7 Generator module to the INPUT connector on the digital multimeter See Figure 6 3 75 O BNC cable Digital multimeter 700 mainframe rear panel m 9 9 T connector BNC female to dual banana adapter AWVG7 module 75 coaxial termination Figure 6 3 Equipment connection for adjusting the output offset and gain 2 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously and th
2. 202 212 Figure 5 4 Location of the test points for the frame timing and clock timing adjustment Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Attach the two P6139A probes to the oscilloscope CH 1 and CH 2 inputs 2 Locate test points TP200 TP202 TP210 and TP212 on the AVG7 circuit board See Figure 5 4 3 Connect the probe tip from the oscilloscope CH 1 input to TP200 4 Connect the probe tip from the oscilloscope CH 2 input to TP210 5 Setthe oscilloscope settings as indicated below Vertical scale CH 1 500 mV div CH 2 1 V div Vertical position 2 0 div Vertical offset CH 1 3 3 V CH2 0V Horizontal scale 5 ns div Horizontal length 500 Trigger position 096 Trigger source CH 1 Trigger type Edge Acquisition mode Average 4 Acquisition mode Relative Signal OFF Measure High Low setup Min Max TG700 TV Signal Generator Platform Service Manual 10 11 12 13 14 15 16 17 18 19 20 21 22 23 AVG7 Analog Video Generator Adjustment Procedures
3. R470 R471 R473 R475 R474 R681 1 T R591 R691 21 0 C n a D R481 a R472 Q N 2 uu 7 0 m D TP430 410 501 504 E 0 91 e Figure 3 2 AGL7 circuit board view Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use 75 BNC cable BNC T connector 75 coaxial terminator and BNC female to dual banana adapter to connect the BLACK 1 connector on the AGL7 Genlock module to the INPUT connector on the digital multimeter as shown See Figure 3 3 3 4 TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Adjustment Procedures 75 coaxial terminator AGL7 module Digital multimeter BNC T connector TG700 mainframe rear panel LS A 4 Eo o BNC female to dual banana adapter 75 BNC cable Figure 3 3 Equipm
4. lt 0704B 604 Figure 6 5 Location of the variable capacitors for the frequency response adjustment TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Adjustment Procedures Procedure WARNING To avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use the two 75 BNC cables peak detector head and BNC female to female connector to connect the upper CH 1 connector on the AWVG7 Generator module to the INPUT connector on the peak detector amplifier See Figure 6 6 2 Use the 75 Q BNC cable to connect the OUTPUT connector on the peak detector amplifier to the CH 1 input connector on the oscilloscope See Figure 6 6 AWVG7 module TG700 mainframe rear panel Oscilloscope TDS784D 8 0 0c 4 Sc c 5 c c poco 5 2 888 c 75 Q BNC cable 5C 2V 1m Gp O
5. 11 1 HDLG7 HD Dual Link Video Generator Maintenance 11 3 HDLG7 HD Dual Link Video Generator Removal and 11 4 Tools Required i 11 4 Replacing the Rear Panel Connectors and Chassis 44 002 11 4 HDLG7 HD Dual Link Video Generator Troubleshooting 2 1 2 11 6 Equipment Pose Lr cer Titre EDU EEUU ENT IE PR E TR DURER HE Ed 11 6 Backing Up the Instrument 2 2 2 11 6 Troubleshooting TRees RET 11 7 HDLG7 HD Dual Link Video Generator Diagram meme e 11 9 HDLG7 HD Dual Link Video Generator Replaceable Parts List 11 10 HDVG7 HDTV Digital Video Generator HDVG7 HDTV Digital Video Generator Theory of 12 1 HDVG7 HDTV Digital Video Generator Adjustment 12 3 Requirements for 22 2 9 EEE ed 12 3 Equipment Required 12 3 Output Level eme eme e messe he A 12 3 HDVG7 HDTV Digital Video Generator
6. 202 212 Figure 6 4 Location of the test points for the frame timing and clock timing adjustment 6 8 Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe m Attach the two 6139 probes to the oscilloscope CH 1 and CH 2 inputs Locate test points TP200 TP202 TP210 and TP212 on the AWVG7 circuit board See Figure 6 4 Connect the probe tip from the oscilloscope CH 1 input to TP200 Connect the probe tip from the oscilloscope CH 2 input to TP202 Set the oscilloscope settings as indicated below Vertical scale CH 1 500 mV div CH 2 1V div Vertical position 2 0 div Vertical offset CH 1 3 3 V CH2 0V Horizontal scale 5 ns div Horizontal length 500 Trigger position 0 Trigger source CH 1 Trigger type Edge Acquisition mode Average 4 Acquisition mode Relative Signal OFF Measure High Low setup Min Max Check that both the CH 1 and CH 2 waveforms are displayed stably and then turn off the CH 1 display TG700 TV Signal Generator Platform Service Manual 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 AWVG7 Analog Wideband Video Generator Adjustment Procedures Select Frame 0 0 nsec from the Frame Timing calibration menu as follows a
7. 1 10 Access 1 15 Procedures for External 2 1 15 Procedure for Internal 2 2 1 1 20 TG700 Mainframe mee se eese 1 24 a 1 24 Troubleshooting ee e e eem 1 25 TG700 Mainframe 222 1 0 1 28 TG700 Mainframe Replaceable Parts 166 0 1 31 Parts Ordering Information 2 222 2 9 1 31 TG700 Signal Generator Platform Service Manual i Table of Contents Using Replaceable Parts rS OA EM M eR br 1 32 Removing a Modul eee Hee e EE rdi e Pee S Ido Seb ses T Tw EY ded pn 1 41 AG7 Audio Generator Audio Generator Theory 22 2 1 AG7 Audio Generator 2 2 Audio Generator Removal and Replacement sss 2 3 gEIEBIGpUcOUME 2 3 Replacing the Rear Panel Connectors and Chassis 2 2 7 2 4 2 3 AG7 Audio Gen
8. 240 1 38 Table 1 11 Blank panel replaceable parts esses m 1 40 Table 1 12 Standard and optional accessories for TG700 mainframe 1 40 Table 2 1 Required tools for removal and replacement of AG7 Audio 2 3 Table 2 2 Equipment required for AG7 Audio Generator troubleshooting 2 5 Table 2 3 Generator module replaceable 0 2 2 2 9 Table 3 1 Equipment required for AGL7 adjustment procedures sees 3 3 Table 3 2 Required tools for removal and replacement of AGL7 Analog Genlock module 3 12 Table 3 3 Equipment required for AGL7 Analog Genlock module troubleshooting 3 14 Table 3 4 AGL7 Analog Generator module replaceable parts 3 18 Table 4 1 Required tools for removal and replacement of ATG7 Test 4 3 Table 4 2 Equipment required for ATG7 Test Generator troubleshooting 4 5 Table 4 3 ATG Analog Test Generator replaceable parts 4 9 Table 5 1 Equipment required AVG7 Analog Video Generator adjustment procedures 5 4 Table 5 2 Required tools for removal and replacement of AVG7 Analog Video Generator 5 22 Tabl
9. 2 4 6 22 Simplified block diagram of the BG7 Generator 7 1 BG7 circuit board view Je eee Ep ERR EO RH ER Soa ee 7 3 Equipment connection for adjusting the output offset and gain 7 3 Equipment connection for adjusting luminance 7 6 Troubleshooting procedure 1 ee eee eme me emen 7 12 Troubleshooting procedure 2 2 2 7 13 Generator module connections 00 7 14 BG7 Generator module exploded view 0 0000 7 16 Simplified block diagram of the DVG7 Generator 8 2 DVG7 circuit board view ue ios eie eI etre p lee EM M ERE qe aces ee dades 8 4 Equipment connection for adjusting the output level esses 8 5 Troubleshooting procedure 1 meme memes 8 11 Troubleshooting procedure 2 2 2 seme 8 12 DVG7 Generator module connections 2 2 2 8 13 DVG7 Generator module exploded View sss 8 15 TG700 TV Signal Generator Platform Service Manual Table of Contents Figure 9 1 Simplified block diagram of the GPS7 module 2 2 9 3 Figure 9 2 Equipment connections for GPS7
10. 3 Y Figure 2 4 AG7 Generator module connections 2 8 TG700 TV Signal Generator Platform Service Manual AG7 Audio Generator Replaceable Parts List AG7 Audio Generator Replaceable Parts List This section contains a list of the replaceable modules for the AG7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations Table 2 3 AG7 Generator module replaceable parts Abbreviations conform to American National Standard ANSI Y 1 1 1972 Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 2 5 116 A001 01 1 EXCHANGE MODULE AG7 116 A001 02 1 EXCHANGE MODULE AG7 116 A001 03 1 EXCHANGE MODULE 116 A001 04 1 EXCHANGE MODULE 116 A001 05 1 EXCHANGE MODULE AG7 1 441 267 03 1 CHASSIS MODULE AG7 ASSY 2 333 404 00 1 PANEL REAR AG7 AL 3 214 4946 00 116 A001 03 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 214 4762 00 116 A001 04 2 SPRING CONICAL 4 213 1129 01 116 001 03 2 SCREW MACHINE M2 5X11MM L PAN HD STL N1 PL CROSS REC amp SLOTTED 211 0911 00 116 A001 04 2 SCREW MACHINE M2 5 PITCH 0 45MM LENGTH 11MM HEAD DIA 5M
11. Item No Minimum requirement Recommended equipment TV signal generator platform 1 Tektronix TG700 Test signal generator 1 Tektronix ATG7 Oscilloscope 1 Bandwidth 1 GHz or higher Function Tektronix TDS784D Option 2C Mask testing Digital multimeter 1 5 1 2 digits FLUKE 8842A Peak detector amplifier 1 Tektronix part number 015 0408 00 and TM500 series power supply Peak detector head 1 Tektronix part number 015 0413 00 Probe 2 X 10 Tektronix P6139A 75 BNC cable 3 Length 72 inches Tektronix part number 012 0159 01 75 Q BNC cable 1 5C 2V 1m Canare DH5C01 S SA 75 feed through termination 1 Tektronix part number 011 0103 02 75 coaxial termination 1 Tektronix part number 011 0102 03 75 0 signal adapter 2 Bandwidth 1 GHz Amplitude precision Tektronix AMT75 3 dB BNC T connector 1 Tektronix part number 103 0030 00 BNC female to dual banana 1 Tektronix part number 103 0090 00 adapter Flat blade screwdriver for 1 Bit shape 2 2 x 0 4 mm Murata KMDRO10 adjusting C604B C704B and C804B BNC female to female connector Canare BCJ J Output Offset and Gain Adjustment Preparation 5 4 perform the output offset and gain adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors on the AVG7 circuit board See Figure 5 2 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Genera
12. 8 10 Table 8 4 DVG7 digital video 222 me eee 8 14 Table 9 1 Equipment required for GPS7 module adjustment procedures 9 4 Table 9 2 Required tools for GPS7 removal and 2 9 10 Table 9 3 Equipment required for GPS7 module troubleshooting 9 13 Table 9 4 GPS7 module troubleshooting 2 2 9 14 T ble 9 5 POST error codes ote RE ade AR ILE E EE RR UL DC n 9 16 Table 9 6 Power supply test points 2 0 108 9 20 Table 9 7 GPS7 module replaceable 2 2 2 0 9 9 28 Table 10 1 Equipment required for HD3G7 HD 3 Gb s SDI Video Generator adjustment jon e dmm 10 4 Table 10 2 SDI output 21 40 10 6 Table 10 3 Required tools for HD3G7 removal and 10 11 Table 10 4 Equipment required to troubleshoot the HD3G7 10 14 Table 10 5 HD3G7 troubleshooting 2 me heme nennen 10 15 Table 10 6 POST error codes 9 10 16 Table 10 7 HD3G7 module factory default 0 10
13. 0 202 22 7 9 Tools vm 7 9 Replacing the Rear Panel Connectors and Chassis 2 2 2 1 7 9 Black Generator Troubleshooting 2 2 2 eme meme mese 7 11 Equipment Required ERRORI ASR deb deena dem SA NU dmn 7 11 Backing Up the Instrument 2 2 0 7 11 Troubleshooting EET 7 12 iv TG700 TV Signal Generator Platform Service Manual Table of Contents Black Generator Diagram 22 me e e e he he meth se een 7 14 BG7 Black Generator Replaceable Parts List 0 00 0 22 4 7 15 DVG7 Digital Video Generator DVG7 Digital Video Generator Theory 1 2 2 20222 22 8 1 DVG7 Digital Video Generator Adjustment Procedures sess 8 3 Requirements for 2 2 8 3 Equipment Required 1 rt rt E UIS RR SEN 8 3 Output Level Adjustment ree ieu era ed Yee 8 3 DVG7 Digital Video Generator Maintenance 2 000 7001 8 7 DVG7 Digital Video Generator Removal and 2 8 8 MGRIESUDUCTME Tp 8 8 Replacing the
14. 2 2 2 9 5 Figure 9 3 GPS7 power supply test 2 2 2 94 9 19 Figure 9 4 GPS7 voltage test point and fuse 9 2 Figure 9 5 GPS7 replaceable parts 12 2 0 9 29 Figure 10 1 Simplified block diagram of the HD3G7 Generator 10 3 Figure 10 2 HD3G7 main board installation e 10 13 Figure 10 3 HD3G7 power supply test points csse me me mene 10 19 Figure 10 4 No Input Detect test point location 0 0 0 0 2 4 10 21 Figure 10 5 HD3G7 HD 3 Gb s SDI Video Generator replaceable parts 10 23 Figure 10 6 HD3G7 main board replaceable parts 10 24 Figure 11 1 Simplified block diagram of the HDLG7 module 2 4 2 4 2 2 11 2 Figure 11 2 Troubleshooting procedure 1 22 He 11 7 Figure 11 3 Troubleshooting procedure 2 2 11 8 Figure 11 4 HDLG7 module 2 se seen 11 9 Figure 11 5 HDLG7 module exploded view 2 2 2 00 11 11 Figure 12 1 Simplified block diagram of the HDVG7 Generator module 12 2 Figure 12 2 HDVG7 circ
15. EI 1 14 Top cover 1 s e eee 1 16 Front panel unit removal eee ere treo ESSE re te Peur Ere 1 18 Disassembly of front panel assembly 2 0 0 0 202 1 19 A10 Main board 2 2 meme 1 21 A40 LAN board fan and RFI filter 2 2 22 2 1 23 Troubleshooting procedure 1 2 meme emen 1 25 Troubleshooting procedure 2 2 22 2222 1 26 A10 Main board view from 2 2 22 22 1 27 TG700 block diagram roe EET 1 29 TG700 interconnect diagram csse eme meme emen 1 30 Main Chassis TTE 1 33 Main 1 35 Pront panel 1 37 Figure 1 18 Power supply 2 1 2 ee 1 39 Figure 1 19 Blank panel ier tret nn e rt Rare EIE Up PER A eamm E32 ders 1 40 Figure 2 1 Simplified block diagram of the AG7 Generator 2 1 Figure 2 2 Troubleshooting procedure 1 2 2 6 Figure 2 3 Troubleshooting procedure 2 2 7 Figure 2 4 AG7 Generator module connections 2 2 2 8 Figure 2
16. BNC female to female connector Peak detector amplifier installed in the TM500 series power supply Peak detector head 75 BNC cable 72 inches 75 BNC cable 72 inches O INPUT OUTPUT Figure 6 6 Equipment connection for adjusting the frequency response TG700 TV Signal Generator Platform Service Manual 6 11 AWVG7 Analog Wideband Video Generator Adjustment Procedures Set the oscilloscope settings as indicated below Vertical scale CH 1 5 mV div Bandwidth 250 MHz Horizontal scale 5 ms div Trigger position 1096 Trigger source CH 1 Trigger type Edge Trigger level 50 mV Acquire menu Average 4 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously and then release the MODULE and FORMAT buttons to restart the instrument in Factory mode Continue holding down the FRONT PANEL ENABLE button until the TG700 Startup with Factory Mode message appears Select the DAC Test calibration signal as follows a Press the MODULE button to display the AWVG7 main menu b Press the up A or down V arrow button to select CALIBRATION c Press the left lt 4 or right gt arrow button to select DAC Test and then press the ENTER button d Press the ENTER button again to confirm the signal output Locate variable capacitors C804B C704B and C604B on t
17. LT TEquipment An Interworld Highway LLC Company TG700 TV Signal Generator Platform Service Manual DELETED D Tektronix 077 0230 04 S TG700 TV Signal Generator Platform Service Manual www tektronix com Tektronix 077 0230 04 Copyright Tektronix rights reserved Licensed software products are owned by Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and international treaty provisions Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc Contacting Tektronix Tektronix Inc 14150 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support n North America call 1 800 833 9200 Worldwide visit www tektronix com to find contacts in your area Warranty Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product Parts modules and replacement produ
18. Procedures for removal and reinstallation of the electrical and mechanical modules B disassembly procedure for removal of all the major modules from the TG700 at one time and for reassembly of those modules into the TG700 Such a complete disassembly is normally only done when completely cleaning the TG700 Instructions for doing the actual cleaning are found under nspection and Cleaning at the beginning of this section B Module disassembly procedures WARNING Before performing any procedure in this subsection disconnect the power cord from the line voltage source Failure to do so could cause serious injury or death Read these general instructions before removing a module First read the Summary of Procedures that follows to understand how the procedures are grouped Then read Equipment Required for a list of the tools needed to remove and install modules in the 7G700 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Removal and Installation Procedures If you are removing a module for service begin by performing the Access Procedure See page 1 15 By following the instructions in that procedure you remove the module to be serviced while removing the minimum number of additional modules Summary of Procedures The procedures are described in the order in which they appear in this section In addition you can look up any procedure for removal and reinstallation of any module in the Table of C
19. 5 Set Black offset a Proceeding from the previous step use the left lt 4 or right f arrow button to select Offset Calibration and then press the ENTER button Use the left lt 4 or right gt arrow button to select the 0 mV signal Measure the offset voltage If necessary use the up or down arrow buttons to adjust the offset voltage to 0 V 5 mV Press the ENTER button to save the setting and exit the offset calibration menu 6 Move the cable to the next output and repeat steps 3 through 5 for the BLACK 2 and BLACK 3 outputs 9 6 TG700 TV Signal Generator Platform Service Manual GPS7 Adjustment Procedures Mainframe Oscillator Adjustments Internal frequency calibration Perform the following procedure to set the internal frequency of the mainframe internal oscillator This adjustment stores the current frequency of the oscillator while it is locked to a GPS or a reference signal to be used when in Internal mode It can be done without any disruption to operation and is best done in the operating environment of the instrument 1 O 11 12 Verify that the instrument has warmed up for a minimum of 20 minutes with the antenna or GPS signal connected Press the MODULE button until GPS7 STATUS appears Check that the signal status shows Locked Check that signal lock indicator displays Fine a Press the up arrow button to select DIAGNOSTICS b Press the ENT
20. SIGNAL 2 p O Rear panel connectors BLACK 1 P010 P802 BLACK 2 O Option BK only A10 Main board Figure 8 6 DVG7 Generator module connections TG700 TV Signal Generator Platform Service Manual 8 13 DVG7 Digital Video Generator Replaceable Parts List DVG7 Digital Video Generator Replaceable Parts List This section contains a list of the replaceable modules for the DVG7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 8 4 DVG7 digital video generator Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 8 7 116 A005 04 1 EXCHANGE MODULE DVG7 116 A006 04 1 EXCHANGE MODULE DVG7 BK 8 7 1 441 A273 03 1 CHASSIS MODULE DVG7 ASSY 2 333 407 00 1 PANEL REAR DVG7 AL 333 A408 00 1 PANEL REAR DVG7 OPTION AL 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26MM 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL NI PL CROSS amp SLOTTED 5 348 A128 00 SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02
21. TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustment Procedures Oscilloscope TDS784D ES Test signal HE Ulo o goo generator ATG7 module 0 700 mainframe d 0 41 e ua 5 CM 2T S 75 Q signal adapter 75 Q feed through 75 Q BNC cable termination 75 Q BNC cable Figure 5 6 Equipment connection for adjusting the group delay 3 Set the oscilloscope settings as indicated below Vertical scale CH 1 5 mV div CH 2 1 00 V div Bandwidth 250 MHz CH 1 Horizontal scale 100 us div Horizontal delay time 200 ns div Delayed runs time 993 472 us Delayed Only Trigger position 50 Trigger source CH 2 Trigger type Edge DPO InstaVu Variable Persistence 500 ms CH 2 waveform OFF 4 Set the test signal generator ATG7 module settings as indicated below Output selection BLACK 1 Signal format PAL Test signal Field Reference 5 Select the CCIR17 signal of the AVG7 Generator module as follows a Press the MODULE button to display the AVG7 main menu b Press the FORMAT button to select PAL 1 and then press the ENTER button c Press the OTHER button to select 17 TG700 TV Signal Generator Platform Service Manual 5 11 AVG7 Analog Video Generator Adjustm
22. 2 2 0 20 1 22 12 7 HDVG7 HDTV Digital Video Generator Removal and 12 8 Tools Required 12 8 Replacing the Rear Panel Connectors and Chassis es 12 8 HDVG7 HDTV Digital Video Generator 2 2 2 1 12 10 Equipment Required uoc eo eto errem ERR EK dudes oe ER DH et b Ee 12 10 Backing Up the Instrument 2202 12 10 Troubleshooting 2 2 12 HDVG7 HDTV Digital Video Generator m 12 13 HDVG7 HDTV Digital Video Generator Replaceable Parts 15 12 14 vi TG700 TV Signal Generator Platform Service Manual List of Fig Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 1 7 Figure 1 8 Figure 1 9 Figure 1 10 Figure 1 11 Figure 1 12 Figure 1 13 Figure 1 14 Figure 1 15 Figure 1 16 Figure 1 17 ures Equipment connection for adjusting master clock 1 4 700 1 12 External 1 13 Internal modules
23. No LTC outputs Run power supply test Verify configuration See page 9 17 Verify configuration Check diagnostics reported values See page 9 18 Check diagnostic reported values Swap modules mainframes f no other problem found replace the GPS7 module Long GPS lock time Check GPS antenna signal source See page 9 17 Check GPS antenna signal source Adjust oven oscillator See page 9 22 Oven oscillator frequency adjustment Adjust oscillator gain See page 9 8 Gain calibration Verify configuration See page 9 17 Verify configuration Check diagnostics reported values See page 9 18 Check diagnostic reported values f no other problem found replace the GPS7 module TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance Table 9 4 GPS7 module troubleshooting cont Problem Actions Unstable genlock or unable to Run Internal Mode Oven test See page 9 24 Internal mode oven test genlock Check GPS7 reference select is set to correct mode See the TG700 User manual for directions Verify reference signal is valid and is the correct format Use a WFM7120 or WFM8300 waveform monitor Check ADC Bus diagnostics See page 9 25 ADC bus diagnostics Run Loop Out Reference test See page 9 26 Loop output reference test Swap modules mainframes f no other problem found replace the GPS7 module Unable to detect or use timeco
24. Reb SEE Fe aep ee dene oder Ea edu xviii Maintenance for Generators and 2 2 2 0 1 00 xix E reb Ne E OUR ER NE ie TI PU UE xix Inspection and Cleanimg iones e reete re eon tede eene de dde SEE Rer E Ente xxi Repackaging Instructions it EI E EE science Stans ERFURT RAS DAS PER EE UN rn xxii TG700 Platform TG700 Mainframe Theory 22 2 1 1 AMO Main Board ree esee QUT NR Eb QU RET 1 1 Power Supply Module secet ree ex inpr EA CR VR ve cU Ra 1 2 TG700 Adjustment Procedures PR ERR don se e Rd d er ae ras ds 1 3 Requirement for 2 2 ese ee se messe hne 1 3 Equipment Required eee et vans ee d ra st dd ERN Pete eo 1 3 Master Clock Frequency 2 2 eese eme se hene nens 1 4 TG700 Mainframe 2 ese ese se messe e esse nnne 1 5 Related Maintenance Procedures 2 2222 1 5 Preparation T T 1 5 Inspection and Cleanmg dete ERR Ee VE sand oe eda aee EE Ee des 1 6 TG700 Mainframe Removal and Installation 02 020022 1 10
25. e He UR e ERR VA RUN UR I Le e e RR ORI 4 6 ATG7 Analog Test Generator Diagram 2 2 emen ene 4 8 Analog Test Generator Replaceable Parts 466 2 2 4 9 AVG7 Analog Video Generator AVG7 Analog Video Generator Theory of eene 5 1 AVG7 Analog Video Generator Adjustment 5 3 Requirements for 222 2 5 3 Equipment Matera caus EUH 5 4 Output Offset and Gain 2 se menses 5 4 Frame Timing and Clock Timing 2 2 20274 2 2 0222 5 7 Group Delay Adjustment Ede e e EE Ee RERO QU V NN Ra ae e n 5 10 Frequency Response 4 5 13 Interchannel Delay 4 2 5 17 Frequency Response Confirmation 21 2 2 e seen 5 20 Interchannel Delay Confirmation 2 2 2 2 4 5 20 AVG7 Analog Video Generator 2 2 meses 5 2 AVG7 Analog Video Generator Removal and 5 22
26. 1 Use the 9 inch socket to remove the nut on the Antenna BNC connector When reinstalling tighten the nut to 14 in Ib 2 Unplug the RF coaxial cable from P1 on the Trimble GPS Receiver board 3 Remove the Antenna connector threading the cable through the rear panel TG700 TV Signal Generator Platform Service Manual 9 11 GPS7 Module Maintenance LTC GPI connector To remove the LTC GPI connector 1 Replacing the Chassis Use the 3 16 inch hex driver to remove the jackscrews securing the LTC GPI connector to the rear panel When reinstalling use the hex driver to tighten the jackscrews hand tight Unplug the LTC GPI cable from J10 on the GPS7 Main board and remove it from the cable clamp When reinstalling twist the cable twice before plugging it in to J10 on the Main board Remove the LTC GP DSUB connector and cable Pull the light pipe out of its board connector This is a slip fit and should come apart easily Remove the external rear panel a Use the 9 6 inch wrench to remove the nuts from the four BNC connectors on the rear panel b Move the external rear panel away from the chassis pulling the light pipe out with it Unplug the RF coaxial cable from P1 on the Trimble GPS Receiver board and remove the Antenna connector and cable Use the 3 16 inch hex driver to remove the jackscrews securing the LTC GPI connector to the rear panel When reinstalling use the hex driver to tighten the jackscrews h
27. 1 22 Perform steps 4 through 6 in reverse order to install all the modules Perform step 3 in reverse order to reinstall the power supply module TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Removal and Installation Procedures RFI filter ZA EJ Ground lead A40 LAN board 4 Top cover J120 Figure 1 9 A40 LAN board fan and RFI filter removal 1 23 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Troubleshooting TG700 Mainframe Troubleshooting This section contains information about diagnostics and troubleshooting trees designed to isolate faulty modules in the TG700 Diagnostics The TG700 has internal diagnostics that verify memory functionality These diagnostics execute read write tests for the signal memory of the following modules HDVG7 E DVG7 m BG7 Option CB A CAUTION When you execute the diagnostics be sure to save the current instrument settings to a preset and then recall the settings after the diagnostics is completed Perform the following procedures to execute the diagnostics 1 Power on plug in the TG700 with the FRONT PANEL ENABLE button pressed This starts up the instrument in Factory mode 2 Wait until initialization of the mainframe and installed modules is completed Check that no error messages appear on the display 3 Press the up A and down arrow button to select UTILITY
28. 2 2 2 6 14 AWVG7 Analog Wideband Video Generator Removal and 6 15 DRESD 6 15 Replacing the Rear Panel Connectors and Chassis sss 6 15 AWVG7 Analog Wideband Video Generator Troubleshooting 2 2 2 6 17 Equipment Required Her ented 6 17 Backing Up the Instrument 2222 22 nent ene ees 6 17 Troubleshooting nete eaves e E Re IRA a 6 18 AWVG7 Analog Wideband Video Generator Diagram ee 6 20 AWVG7 Analog Wideband Video Generator Replaceable Parts 84 6 21 BG7 Black Generator Black Generator Theory of Operation nee 2 7 1 Black Generator Adjustment 2 2 ens 7 2 Requirements for 2 9 9 EEE Een 7 2 Equipment Required esie Peek sae POR UI eiie i te M Dedi a re 7 2 Output Offset and Gain 2 2 7 3 Luminance Gain Adjustment Option CB 2 21 2 1 7 6 BG7 Black Generator Maintenance ems ese 7 8 Black Generator Removal and
29. This block consists of an MPU interface and an overlay controller It inserts data from the Overlay Memory into the Line Memory data stream to create circular patterns ID text and logo Overlay memory generates timings to multiplex the line memory data and the overlay data used for a circle ID text and logo overlay This block consists of a D A converter two amplifiers and a filter It converts the digital data from the Overlay Controller to analog signal and reconstruct the signal for output TG700 TV Signal Generator Platform Service Manual 5 1 AVG7 Analog Video Generator Theory of Operation Bus Interface Line Memory for YIG Line Memory for Pb B Line Memory for PriR Address Generator D A Converter amp Amp D A Converter Overlay amp PbiB Controller D A Converter amp Amp Overlay Memory Figure 5 1 Simplified block diagram of the AVG7 Generator module 5 2 TG700 Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustment Procedures AVG7 Analog Video Generator Adjustment Procedures This section contains information needed to adjust the AVG7 Generator module Adjustment in the AVG7 Generator module are for the output offset and gain frame timing and clock timing group delay frequency response and interchannel delay Requirements for Adjustment Before doing the adjustment note the following requirements Personnel This procedure i
30. typically 116 mV Oscilloscope Cycle Mean typically 1 mV Sine wave RMS amplitude typically 116 mV Attenuation Factor Adjustment Record Expected direct Signal 1 amplitude Measured direct typically 328 mV Calculated corrected value Signal 2 amplitude Measured direct u typically 328 mV Calculated corrected value 10 6 Print this table for use during the Adjustment Procedure Minimum Value Maximum RMS Cycle Mean 2 35 2 55 Value Minimum Before Adjustment After Adjustment Maximum 776 mV 824 mV 776 mV 824 mV TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures Characterize the test system 1 Set up DSA8200 CAUTION Electrostatic discharge can damage the oscilloscope modules To prevent damage always work in a static free environment and discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules a Install the 80A03 output cable into the oscilloscope Channel 1 2 slot b Install the 80E04 sampling head into the 80A03 adapter and connect the two using the semirigid SMA cables that come with the 80A03 adapter c Install the TCA 75 into the left port of the 80A03 d Ifnecessary press the Default Settings button on the oscilloscope e Press the Channel button on the 80E04 sampling head to activate Channel 1 2 Connect th
31. 3 3V 0 35W 1575 42 MHZ L1 2 6 X 1 3 X 0 33 TRIMBLE RESOLUTION T 14 174 5511 00 CABLE DSUB TO BOARD 15 CONDUCTOR 15 343 1584 00 CLAMP WIRE ROUTING 0 51 H X 0 625W NYLON STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUT DRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM 9 28 TG700 TV Signal Generator Platform Service Manual GPS7 Module Replaceable Parts List Figure 9 5 GPS7 replaceable parts TG700 TV Signal Generator Platform Service Manual 9 29 GPS7 Module Replaceable Parts List 9 30 TG700 Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Module HD3G7 HD 3 Gb s SDI Video Generator Theory of Operation Overview This section describes the basic operation of the major circuit blocks in the HD3G7 module The discussions relate to the Block Diagram See Figure 10 1 on page 10 3 There is some circuitry on the HD3G7 Main circuit board which is not used Unused circuitry is not represented in the block diagram nor is it discussed in this theory of operation The HD3G7 module has three circuit boards the main module board which mounts horizontally and contains the bulk of the circuitry and two small input and output boards These input and output boards plug into the main board vertically and provide the
32. Check that both CH 1 and CH 2 waveforms are displayed stably and then turn off the CH 1 display Select Frame 0 0 nsec from the Frame Timing calibration menu as follows a Press the MODULE button to display the AVG7 main menu b Press the up A or down V arrow button to select CALIBRATION c Press the left lt 4 or right amp arrow button to select Frame Timing and then press the ENTER button d Press the left lt 4 or right gt arrow button to select Frame 0 0 nsec and then press the ENTER button Save the CH 2 waveform on the oscilloscope in Refl and then display the saved waveform Select Delay from the Measure menu and then set the oscilloscope to measure the time delay between the Refl and CH 2 waveforms Press the up A or down V arrow button to select 2 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right gt arrow button to adjust the delay value to 2 0 ns Press the up A or down V arrow button to select 10 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right arrow button to adjust the delay value to 10 0 ns Press the up A or down V arrow button to select 22 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right gt arrow button to adjust the delay value to 22 0 ns Press the CANCEL button to return the CALIBRATION menu Press the left lt 4 or right f arr
33. DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUTDRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM TG700 TV Signal Generator Platform Service Manual BG7 Black Generator Replaceable Parts List Figure 7 8 BG7 Generator module exploded view 7 16 TG700 TV Signal Generator Platform Service Manual DVG7 Digital Video Generator DVG7 Digital Video Generator Theory of Operation Bus Interface Address Generator Frame Memory Line Memory Overlay Controller Overlay Memory Formatter Audio Memory Serializer Black Generator Option BK Only This section describes the basic operation of the major circuit blocks in the DVG7 Generator module This block provides the communication between the mainframe and the module circuit This block consists of a frame delay an MPU interface a sequencer an SDRAM controller and a blanking data generator It interfaces the Frame Memory and the Line Memory and controls the output sequence of the video data in these memories The frame memory contains a series of pointers that control the order the video lines stored in Line Memory are used to produce the serial digital signals The memory holds the actual sample points that define a serial digital signal This block consists of an MPU interface and an overlay controller It inserts data from the Overlay Memory into the Line Memory data stream to create circular patterns ID text and logo The memory ge
34. Luminance Gain Adjustment Option CB Only Preparation perform the luminance gain adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Cover After you have removed the top cover find the variable resistors on the BG7 circuit board See Figure 7 2 Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use the 75 BNC cable to connect the BLACK 3 connector on the BG7 Generator module to the CHAN A connector on the video measurement set See Figure 7 4 2 Use the 75 coaxial terminator to terminate the other loop through to the CHAN A connector on the video measurement set 75 Q BNC cable 75 Q coaxial terminator OOOO TG700 mainframe rear panel m OO A a ec JeQe jJec ole ale om m Video measurement set BG7 module rear panel VM700T Option 01 11 Figure 7 4 Equipment connection for adjusting luminance gain 7 6 TG700 TV Signal Generator Platform Service Manual 10 11 12 13 14 15 BG7 Black Generator Adjustment Procedures Select the 75 Colour Bars signal for BLACK 3 and BLACK 4 as follows a Press the MODULE button to display t
35. probes to the oscilloscope CH1 and CH2 inputs Locate test points TP410 TP420 TP430 TP501 TP502 and TP504 on the AGL circuit board See Figure 3 2 Locate variable resistors R470 R471 R472 R473 R474 and R475 on the AGL7 circuit board See Figure 3 2 Turn all the variable resistors completely counterclockwise Connect the probe tip from the oscilloscope CH1 input to TP501 Connect the probe tip from the oscilloscope CH2 input to TP430 Set the oscilloscope settings as indicated below Vertical 500 mV div Vertical position 3 0 div Horizontal 2 ns div Trigger source CH1 Trigger level 1 5 V Trigger slope Rising Edge TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Adjustment Procedures 10 Adjust R470 so that the CH2 signal is delayed by 4 0 5 ns from the CHI signal See Figure 3 4 CH1 signal 501 gt 40 05ns CH2 signal TP430 Figure 3 4 Timing relationship between CH1 and CH2 signals 11 Move the probe from TP501 to TP502 12 Change the horizontal fine timing of the BLACK 3 output from 7 0 ns to 7 0 ns and verify that the CH2 signal moves at least 13 5 ns 13 If the CH2 signal moves less than 13 5 ns turn R471 to its center position and then perform the following steps a Move the CHI probe from TP502 to TP501 b Setthe horizontal fine timing of BLACK 3 output to 0 00 ns c Adjust R470 so that the CH2 signal is delayed by 4 0 5 ns
36. 0 5 ns from the CHI signal Change the probe connection from TP504 to TP502 Change the horizontal fine timing of the BLACK 2 output from 10 0 ns to 10 0 ns and verify that the CH2 signal moves at least 18 5 ns If the CH2 signal moves less than 18 5 ns turn R475 its center position and then perform the following steps a Change the CH1 probe connection from TP502 to TP504 b Setthe horizontal fine timing of BLACK 2 output to 0 00 ns c Adjust R474 so that the CH2 signal is delayed by 8 0 5 ns from the CHI signal d Change the horizontal fine timing of the BLACK 2 output from 10 0 ns to 10 0 ns and verify that the CH2 signal moves at least 18 5 ns If the CH2 signal still moves less than 18 5 ns turn R475 completely clockwise and then repeat parts a through d TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Module Maintenance AGL7 Analog Genlock Module Maintenance This section contains instructions and procedures for maintaining the AGL7 Genlock module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 3 12 m Troubleshooting See page 3 14 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative f
37. 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL NI PL CROSS REC amp SLOTTED 5 348 A156 01 1 GASKET SHIELD FINGER TYPE BE CU 8 13MM W X 2 79MM H X406 4MM L 6 174 5277 00 5 CABLE RF 75 OHM 110MM BNC TO MCX75 7 211 A245 01 5 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W NUT amp amp LOCK 8 671 6184 00 9 334 1378 03 WASHER TG700 TG700 AG7 AGL7 DVG7 HDVG7 CIRCUIT BD ASSY DUAL LINK GENERATOR CONVERTER TESTED WIRED 389386000 MARKER DENT MKD SERIAL NO STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUTDRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM 11 10 TG700 TV Signal Generator Platform Service Manual HDLG7 HD Dual Link Video Generator Replaceable Parts List Figure 11 5 HDLG7 module exploded view TG700 TV Signal Generator Platform Service Manual 11 11 HDLG7 HD Dual Link Video Generator Replaceable Parts List 11 12 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator HDVG7 HDTV Digital Video Generator Theory of Operation Bus Interface Address Generator Frame Memory Line Memory Overlay Controller Overlay Memory Formatter Audio Memory Serializer Black Generator Option BK Only TG700 TV Signal Generator Platform Service Manual This section describes the basic operation
38. 2 22 eese een 9 28 HD3G7 HD 3 Gb s SDI Video Generator Module HD3G7 HD 3 Gb s SDI Video Generator Theory 10 1 OVERVIEW seo TR TRA SN 10 1 FPGA and Associated 2 221 10 1 Clocks and Brame iue eerte entere ese neta te Wee ER ie a de t ne iei 10 2 Input and Output Boards e hx ate ERR Ve DR ERA NE aane Ped Ea ae heir 10 2 Power LTUPP T 10 3 TG700 Signal Generator Platform Service Manual Table of Contents HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures 2 10 4 Requirements for 22 2 eese he messen nnns 10 4 Equipment Required eei 10 4 HD3G7 Module Adjustment 10 5 HD3G7 HD 3 Gb s SDI Video Generator 00 10 10 HD3G7 3 Gb s SDI Video Generator Removal and Replacement 10 11 HD3G7 Troubleshooting 10 13 HD3G7 HD 3 Gb s SDI Video Generator Replaceable Parts 1184 10 22 HDLG7 HD Dual Link Video Generator HDLG7 HD Dual Link Video Generator Theory of
39. 441 A269 02 1 CHASSIS MODULE 2 333 454 00 1 PANEL REAR AL AWVG7 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL N1 PL CROSS REC amp SLOTTED 5 348 A128 00 2 5CM SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 6 174 B851 00 6 CABLE ASSY RF 750HM COAX RG179 5 5CM L BNC TO MCX 7 211 245 01 5 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUTDRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM TG700 TV Signal Generator Platform Service Manual 6 21 AWVG7 Analog Wideband Video Generator Replaceable Parts List Figure 6 11 AWVG Generator module exploded view 6 22 TG700 Signal Generator Platform Service Manual BG7 Black Generator BG7 Black Generator Theory of Operation This section describes the basic operation of the major circuit blocks in the BG7 Generator module Bus Interface This block provides the communication between the mainframe and the module circuit Sync Generator block creates the digital data of NTSC PAL black burst signal or HDTV trilevel sync signal When optional memories are added sync generator 3 and 4 can also generate 10 field ID and NTSC PA
40. 6 174 B846 00 2 CABLE ASSY RF 750HM COAX RG179 6CM L BNC TO PL71 LP 1 5C 174 B846 00 4 CABLE ASSY RF 750HM COAX RG179 6CM L BNC TO PL71 LP 1 5C OPTION BK 7 211 A245 01 8 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 211 A245 01 6 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER OPTION BK 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUT DRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM 8 14 TG700 TV Signal Generator Platform Service Manual DVG7 Digital Video Generator Replaceable Parts List Figure 8 7 DVG7 Generator module exploded view TG700 TV Signal Generator Platform Service Manual 8 15 DVG7 Digital Video Generator Replaceable Parts List 8 16 TG700 TV Signal Generator Platform Service Manual GPS7 GPS Genlock Module with Timecode GPS7 Theory of Operation The GPS7 module is a GPS and genlock synchronization module with a timecode reader and generator This section describes the basic operation of the major circuit blocks in the GPS7 module See Figure 9 1 access to the GPS7 module occurs through the address and data busses shown as the CPU I O bus The interface is a PLD on the GPS7 module which is the central control interface for MCU data tr
41. A block diagram of the AWVG7 Generator module is located in the Theory of Operation section See page 6 1 AWVG7 Generator module TG700 mainframe Co c J830A A10 CH 1 upper Main board Ma 77 oo O J830B CH 1 lower i v 9 777 J730A 2 2 P301 Rear panel _ 9 J730B connectors CH 2 lower 77 J630A CH 3 upper Ce 2 9 77 Co c J630B CH 3 lower i V 4 77 Figure 6 10 AWVG7 Generator module connections 6 20 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Replaceable Parts List AWVG7 Analog Wideband Video Generator Replaceable Parts List This section contains a list of the replaceable modules for the AWVG7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations Abbreviations conform to American National Standard ANSI Y1 1 1972 Table 6 4 AWVG7 Analog Wideband Video Generator replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 6 11 116 018 00 1 EXCHANGE MODULE AWVG7 6 11 1
42. Adjustment Procedures This section contains information needed to adjust the TG700 The only adjustment in the TG700 is for the master clock frequency NOTE If your TG700 has GPS7 GPS Synchronization and Timecode Generator module you can use it to adjust the master clock frequency This alternate procedure locks the master clock to a GPS signal See page 9 7 Requirement for Adjustment Before proceeding note the following requirement Warm Up Period The TG700 requires a 20 minute warm up time in a 20 C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance In addition the signal generator requires appropriate warm up time to meet the frequency accuracy Equipment Required The following table lists the equipment required to adjust the master clock frequency Table 1 1 Equipment required for TG700 adjustment procedures Item No Minimum requirement Recommended equipment Analog genlock module 1 Tektronix AGL7 Signal generator 1 Frequency 10 MHz 0 05 ppm Agilent 8648A option 1E5 Amplitude 8 dBm 75 BNC cable 1 Length 42 inches Tektronix part number 012 0074 00 50 Q to 75 Q minimum loss 1 Tektronix part number 011 0057 01 attenuator TG700 TV Signal Generator Platform Service Manual 1 3 TG700 Adjustment Procedures Master Clock Frequency Adjustment Procedure Perform the following procedure to adjust t
43. Horizontal scale 20 ys div Horizontal delay time 50 ns div Delayed runs time 6 760 us Delayed Only Trigger position 5096 Trigger source CH 3 Trigger type Edge Acquire menu Average 8 Repetitive Signal OFF CH 3 WAVEFORM OFF 5 Setthe test signal generator ATG7 module settings as indicated below Output selection BLACK 1 Signal format NTSC Test signal Field Reference 6 Use the CH 2 vertical position knob on the oscilloscope to align the CH 2 trace to the CH 1 trace with no signal input 7 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously and then release the MODULE and FORMAT buttons to restart the instrument in Factory mode Continue holding down the FRONT PANEL ENABLE button until the TG700 Startup with Factory Mode message appears TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustment Procedures 8 Select the DAC Test calibration signal as follows a Press the MODULE button to display the AVG7 main menu b Press the up A or down V arrow button to select CALIBRATION Press the left lt 4 or right gt arrow button to select DAC Test and then press the ENTER button d Press the ENTER button again to confirm the signal output 9 Select the Sync ON AII Channels mode as follows a Press the up A or down arrow button to select VIDEO and then press the ENTER button to access the VIDEO submenu b Press the up A or down V arrow butto
44. INPUT connector on the peak detector amplifier See Figure 5 9 2 Use 75 BNC cable to connect the OUTPUT connector on the peak detector amplifier to the CH 1 input connector on the oscilloscope See Figure 5 9 3 Use the 75 O BNC cable and the 75 Q feed through termination to connect the BLACK 1 connector on the test signal generator to the CH 2 input connector on the oscilloscope See Figure 5 9 TG700 TV Signal Generator Platform Service Manual 5 13 AVG7 Analog Video Generator Adjustment Procedures Test signal generator ATG7 AVG7 module 700 mainframe rear panel 5 el JA 4 75 BNC cable 5C 2V 1m BNC female to female connector Peak detector head Peak detector amplifier installed in the TM500 series power supply 75 Q BNC cable 72 inches Oscilloscope TDS784D 1000001 Q 2cococ3cococo 75 feed through termination 75 BNC cable 72 inches INPUT 75 BNC cable 72 inches OUTPUT Figure 5 9 Equipment connection for adjusting the frequency response 4 Set the oscilloscope settings as indicated below Vertical scale Bandwidth Horizontal scale Trigger position Trigger source Trigger type Acquire m
45. MODULE button to display the BG7 main menu b Press the up A or down V arrow button to select CALIBRATION Press the left amp or right gt arrow button to select BLACK 1 and then press the ENTER button d Press the left lt 4 or right gt arrow button to select CAL DAC Offset 0V DC and then press the ENTER button e Press the CANCEL button f Repeat parts a through e of this step to select the calibration signal for BLACK 2 through BLACK 4 Locate variable resistor RA91 on the BG7 circuit board See Figure 7 2 Adjust R491 so that the output offset is 0 V 1 mV Change the BNC cable connection from BLACK 1 connector to the BLACK 2 connector on the BG7 Generator module Locate variable resistor R591 on the BG7 circuit board See Figure 7 2 Adjust R591 so that the output offset is 0 V 1 mV Change the BNC cable connection from BLACK 2 connector to the BLACK 3 connector on the BG7 Generator module Locate variable resistor R691 on the BG7 circuit board See Figure 7 2 Adjust R691 so that the output offset is 0 V 1 mV Change the BNC cable connection from the BLACK 3 connector to the BLACK 4 connector on the BG7 Generator module Locate variable resistor R791 on the BG7 circuit board See Figure 7 2 Adjust R791 so that the output offset is 0 V 1 mV TG700 TV Signal Generator Platform Service Manual 15 16 17 18 19 20 21 22 23 24 25 26 BG7
46. Platform Service Manual TG700 Mainframe Removal and Installation Procedures Line cord Top cover Front cover A20 Front Key board Figure 1 3 External modules TG700 TV Signal Generator Platform Service Manual 1 13 TG700 Mainframe Removal and Installation Procedures A40 LAN board Power supply module A10 Main board o E g gt Figure 1 4 Internal modules TG700 TV Signal Generator Platform Service Manual 1 14 Access Procedure TG700 Mainframe Removal and Installation Procedures When you have identified the module to be removed for service read General Instructions See page 1 10 Then use the following table to determine which procedures to use for removing the module The removal procedures end with installation instructions If the module is shown in Use this procedure Figure 1 3 use these procedures Line cord See page 1 15 Top cover See page 1 15 Front panel unit See page 1 17 Front panel assembly See page 1 18 Figure 1 4 first remove the Line Cord A10 Main board See page 1 20 procedures Procedures for External Modules Do the Access Procedure before doing any procedure in this group See page 1 15 This group contains the following procedures Line Cord 1 Top Cover 2 Line Cord Top Cover Front Panel Unit Front Panel Assembly Assemble the equipment and locate the line cord You need no equipment Locate the l
47. Setthe GPS7 module under test to internal reference mode a Press the Module button to select GPS7 1 b Press the up A or down arrow buttons to select REFERENCE and then press the ENTER button c If necessary press the up or down arrow buttons to select SOURCE d Press the left lt 4 or right gt arrow buttons to select Internal and then press the ENTER button 2 Use the frequency accuracy setup from the TG700 Specifications and Performance Verification manual available on the Web at www tektronix com manuals to compare the Black Burst signals from the instrument under test to the reference unit An alternate way to check frequency accuracy follows step 4 3 Since the instrument under test is in internal mode the timing may shift The vector will probably spin relative to the reference unit which is locked to GPS 4 Use the timing display to measure how fast the timing is shifting A 1 ps shift per second equates to a 1 ppm difference in the time bases of the two units Measure the timing shift for a reasonable time and then calculate the frequency error For example a 25 us shift in 10 seconds 25 10 a 2 5 ppm error Go to step 7 Alternate procedure As an alternative to using a reference TG700 GPS7 unit you can use a frequency counter to determine the frequency error 5 Connect the frequency counter to the BLACK 3 output 6 Configure the BLACK 3 output to produce a 10 MHz CW signal
48. Tools REQUiIred eae ie 5 22 Replacing the Rear Panel Connectors and Chassis 2 2 020 2 2 5 22 AVG7 Analog Video Generator Troubleshooting cesses een 5 24 Equipment Reg itred o oeer ero rer E ea oes TRES PRU EN dota luamesteenees 5 24 Backing Up the Instrument Settings esses emen 5 24 Troubleshooting bass Or ts 5 25 TG700 TV Signal Generator Platform Service Manual iii Table of Contents AVG7 Analog Video Generator 2 2 5 27 AVG7 Analog Video Generator Replaceable Parts 164 2 2 2 2 222 1 5 28 AWVG7 Analog Wideband Video Generator AWVG7 Analog Wideband Video Generator Theory of Operation 2 6 1 AWVG7 Analog Wideband Video Generator Adjustment Procedures 6 3 Requirements for 2 2 22 eese eee nene 6 3 Equipment Required ebbe rr 6 4 Output Offset Gain 2222 eee ee eee 6 4 Frame Timing and Clock Timing Adjustments cesses menn 6 7 Frequency Response Adjustment csse 2 2 6 10 AWVG7 Analog Wideband Video Generator Maintenance
49. and Installation Procedures 5 Spray wash dirty parts with the ethyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate 6 Use hot deionized water to thoroughly rinse them 7 Dry all parts with low pressure deionized air 8 Dry all components and assemblies in an oven or drying compartment using low temperature circulating air Lubrication There is no periodic lubrication required for the TG700 TG700 TV Signal Generator Platform Service Manual 1 9 TG700 Mainframe Removal and Installation Procedures TG700 Mainframe Removal and Installation Procedures Preparation General Instructions This subsection contains procedures for removal and installation of almost all mechanical and electrical modules Any electrical or mechanical module assembly or part listed in the Replaceable Parts List section of this manual is a module WARNING Before performing this or any other procedure in this manual read the Safety Summary found at the beginning of this manual Also to prevent possible damage to the T G700 s components read Preventing ESD in this section This subsection contains the following items B Preparatory information that you need to properly perform the procedures that follow List of tools required to remove and disassemble all modules Two module locator diagrams for finding the External modules and Internal modules in the TG700 See Figure 1 3 See Figure 1 4
50. at J830 BLACK 1 J880 BLACK 2 J930 SIGNAL and J980 BARS on the ATG7 circuit board 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector TG700 TV Signal Generator Platform Service Manual 4 3 ATG7 Analog Test Generator Removal and Replacement 4 4 Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the five screws securing the ATG7 circuit board to the chassis Lift the circuit board up and away from chassis and then place it on a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a screwdriver with a 2 Phillips tip to install the five screws securing the circuit board to the chassis Apply the rear panel to the chassis and then install all the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual ATG7 Analog Test Generator Troubleshooting ATG7 Analog Test Generator Troubleshooting Equipment Required This section contains instructions and procedures for troubleshooting the ATG7 Generator module These procedures will help you decide whether it is necessary to replace your m
51. d t r3 CJUO mmm gi Ed Aro ELI 4 R681 R781 R691 791 Figure 7 2 BG7 circuit board view BNC female to dual banana adapter Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use the 75 BNC cable BNC T connector 75 coaxial terminator and BNC female to dual banana adapter to connect the BLACK 1 connector on the BG7 Generator module to the input connector on the digital multimeter See Figure 7 3 75 BNC cable Digital multimeter TG700 mainframe rear panel BNC T connector DE 90 9 T H E56 module 75 coaxial terminator Figure 7 3 Equipment connection for adjusting the output offset and gain TG700 TV Signal Generator Platform Service Manual 7 3 BG7 Black Generator Adjustment Procedures 10 11 12 13 14 7 4 Press the MODULE FORMAT FRONT PANEL ENABLE buttons simultaneously and then release the MODULE and FORMAT buttons to restart the instrument in Factory mode Select the DAC Offset 0V DC calibration signal for BLACK 1 through BLACK 4 as follows a Pressthe
52. from the CHI signal d Change the horizontal fine timing of the BLACK 3 output from 7 0 ns to 7 0 ns and verify that the CH2 signal moves at least 13 5 ns If the CH2 signal still moves less than 13 5 ns turn R471 completely clockwise and then repeat parts a through d 14 Change the CH2 probe connection from TP430 to TP410 15 Adjust R472 so that the CH2 signal is delayed by 8 0 5 ns from the CHI signal 16 Change the CH1 probe connection from TP502 to TP504 TG700 TV Signal Generator Platform Service Manual 3 9 AGL7 Analog Genlock Adjustment Procedures 17 18 19 20 21 22 23 Change the horizontal fine timing of the BLACK 1 output from 10 0 ns to 10 0 ns and verify that the CH2 signal moves at least 18 5 ns If the CH2 signal moves less than 18 5 ns turn R473 its center position and then perform the following steps a Change the probe connection from TP504 to TP502 b Setthe horizontal fine timing of BLACK 1 output to 0 00 ns c Adjust R472 so that the CH2 signal is delayed by 8 0 5 ns from the CHI signal d Change the horizontal fine timing of the BLACK 1 output from 10 0 ns to 10 0 ns and verify that the CH2 signal moves at least 18 5 ns If the CH2 signal still moves less than 18 5 ns turn R473 completely clockwise and then repeat parts a through d Change the CH2 probe connection from TP410 to 420 Adjust R474 so that the CH2 signal is delayed by 8
53. generating or holding a static charge should be allowed on the workstation surface Keep the component leads shorted together whenever possible Pick up components by the body never by the leads Do not slide the components over any surface Avoid handling components in areas that have a floor or work surface covering capable of generating a static charge Use a soldering iron that is connected to earth ground Use only special antistatic suction type or wick type desoldering tools NOTE A 2 6 RMA flux content solder is recommended for making repairs in this instrument Cleaning of rosin residue is not recommended Most cleaning solvents tend to reactivate the rosin and spread it under components where it may cause corrosion under humid conditions The rosin residue if left alone does not exhibit these corrosive properties TG700 TV Signal Generator Platform Service Manual Maintenance for Generators and Modules Inspection and Cleaning General Care AN Inspecting and Cleaning Procedures Performance Verification Preventive maintenance consists of cleaning visual inspection performance verification and if needed readjustment The preventive maintenance schedule established for the instrument should be based on the environment in which it is operated and the amount of use Under average conditions scheduled preventive maintenance should be performed every 2000 hours of operation Protect the module from adverse
54. in the following table is required for troubleshooting Table 2 2 Equipment required for AG7 Audio Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the trouble shooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up or down V arrow button to select SAVE 4 Press the left lt 4 or right gt arrow button to select a preset number to save instrument settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual 2 5 AG7 Audio Generator Troubleshooting Troubleshooting Trees Power on the TG700 as follows 1 Connect the power cable to the instrument 2 Wait until the mainframe and the module completely initialize Check that no error messages appear on the display 3 Press the front panel MODULE button Is main menu displayed Replace the module Perform the Functional Check procedures in the
55. inches Tektronix part number 012 0074 00 50 BNC to SMA adapter Tektronix part number 015 1018 00 75 coaxial terminator Tektronix part number 011 0102 01 1 1 75 Q BNC cable 1 1 1 1 75 Q signal adapter Bandwidth 1 GHz Amplitude precision Tektronix AMT75 3 dB Output Level Adjustment Preparation To perform the output level adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Cover After you have removed the top cover find the variable resistors on the HDVG7 circuit board See Figure 12 2 TG700 TV Signal Generator Platform Service Manual 12 3 HDVG7 HDTV Digital Video Generator Adjustment Procedures Shield case R630 Or E Shield case Figure 12 2 HDVG7 circuit board view Procedure WARNING 70 avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Usethe 75 BNC cable 75 signal adapter and SMA to BNC adapter to connect the SIGNAL 1 connector on the HDVG7 Generator module to the CHI input connector on the oscilloscope as shown See Figure 12 3 NOTE Some sampling oscilloscopes do not automatically adjust their readouts to account for th
56. inside dimensions six or more inches greater than the dimensions of the instrument Use a shipping carton that has a test strength of at least 250 pounds 113 5 kg b Surround the module with a protective anti static bag c Pack dunnage or urethane form between the instrument and the carton If using Styrofoam kernels overfill the box and compress the kernels by closing the lid There should be three inches of tightly packed cushioning on all sides of the instrument 3 Sealthe carton with shipping tape industrial stapler or both xxii TG700 TV Signal Generator Platform Service Manual 1G700 Platform TG700 Mainframe Theory of Operation A10 Main Board CPU amp Memory D A Converter Oscillator Frame Pulse Generator Module I F DC DC Converter Network Interface This section describes the basic operation of the major circuit blocks or modules in the TG700 The Diagrams section includes a block diagram and an interconnect diagram See page 1 28 A diagram shows the modules and functional blocks of the TG700 See Figure 1 13 Another diagram shows how the modules interconnect See Figure 1 14 The A10 Main board consists of the following seven blocks This block consists of CPU 32 MB flash memory and 16 MB RAM The CPU controls the front panel LCD display and installed modules It also controls execution of remote commands and downloading and uploading of signal files through the Ethernet interface
57. meets the specifications Procedure 1 Use the equipment connection and controls from the frequency response adjustment See page 5 13 Check that the differences of each signal amplitude from 500 kHz to 5 MHz are less than or equal to 2 mV If necessary readjust the following variable resistors and capacitors CH 1 output C835A and R835A CH 2 output C735A and R735A CH 3 output C635A and R637A Interchannel Delay Confirmation After you have performed the group delay adjustment be sure to check that the interchannel delay meets the specifications Procedure 1 5 20 Use the equipment connection and controls from the interchannel adjustment See page 5 17 Check that the time delay among the channel outputs is less than or equal to ns If necessary readjust the following variable capacitors CH 1 output C837A CH 2 output C737A CH 3 output C637A TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Maintenance AVG7 Analog Video Generator Maintenance This section contains instructions and procedures for maintaining the AVG7 Generator module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 5 22 m Troubleshooting See page 5 24 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to p
58. menu displayed Replace the module Perform the Functional Check procedures in the user manual Figure 5 13 Troubleshooting procedure 1 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Troubleshooting Power off and remove the module then install it into TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the mole TG700 mainframe Refer to Trouble operating correctly shooting in the TG700 TV Signal Generator Platform Service Manual AVG7 module OK Replace the module Figure 5 14 Troubleshooting procedure 2 5 26 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Diagram AVG7 Analog Video Generator Diagram The following figure shows the AVG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the TG700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the AVG7 Generator module is located in the AVG7 Theory of Operation section See page 5 1 AVG7 Generator module TG700 mainframe eo J830A A10 CH 1 upper Main board d 77 o J830B CH 1 lower FD Slot 1 77 J730A 2 Rear p
59. necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the 7G700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting TG700 TV Signal Generator Platform Service Manual 10 13 HD3G7 HD 3 Gb s SDI Video Generator Maintenance The equipment listed here is needed to troubleshoot the HD3G7 HD 3 Gb s SDI Video Generator Required Equipment Table 10 4 Equipment required to troubleshoot the HD3G7 module Equipment TG700 mainframe Requirement For the HD3G7 module under test Suggested equipment Tektronix TG700 HD SDI video signal generator 1080 59 94i 100 Color Bars signal Tektronix TG700 with HDVG7 generator module HD Waveform monitor Oscilloscope Must be able to display 3 Gb s SDI signal and jitter gt 500 MHz bandwidth 50 input Tektronix WFM7120 Tektronix DPO4104 Digital Multimeter Used to check power supply voltages and fuses Fluke 87 or equivalent 75 0 BNC cables 2 Length 42 inches used to connect the instruments Tektronix part number 012 0074 00 50 0 BNC cable 1 Length 43 inches used to test trigger output Tektronix part number 012 0057 01 ROHS compliant ESD safe soldering workstation The HD3G7 boards do not contain any user serviceable parts but any soldering must be ROHS compliant Other TG700 modules Used to test mainframe operation
60. rear BNC connections and the circuits required to buffer the high speed I O signals The heart of the HD3G7 generator is an FPGA with other circuits that provide support and ancillary functions There are two basic operational modes Generator and Converter In generator mode the FPGA creates the output signal such as color bars or a ramp The information to create the signals is completely contained within the FPGA Serialization and scrambling is also done in the FPGA In converter mode an input signal at 1 5 Gb s HD rate is up converted to 3 Gb s De serialization up conversion and reserialization are all handled in the FPGA FPGA and Associated Circuits Generator Mode A Programmable Logic Device PLD configures the FPGA by loading a file from the Flash at power up This configures the FPGA for normal operation there is a separate file for calibration The CPU interface connects to both the PLD and FPGA During SW upgrade the Flash files are loaded from the mainframe via the PLD The FPGA uses the CPU connection to access the control registers In generator mode the FPGA contains horizontal and vertical counters which create the raster structure for the selected signal These counters drive the FPGA elements that create the actual video signals such as color bars or flat field along with the EAV and SAV info and the required CRCs The video signals are then scrambled serialized and sent at the full 3 Gb s out of the FPGA to
61. select STATUS 3 Use the left lt 4 or right gt arrow buttons to select Signal Quality Wait for the Signal Quality readout to stabilize This may take several minutes 4 Check Signal Quality and Sats 5 Ifsignal quality is 230 and the number of detected satellites is 24 then end this test If not then continue TG700 TV Signal Generator Platform Service Manual 9 17 GPS7 Module Maintenance If the GPS7 module under test is the antenna power source check that the GPS7 module is set to the correct antenna voltage a Press the up A or down V arrow buttons to select GPS SETUP b Press the ENTER button to enter the setup submenu c If necessary use the up or down V arrow buttons to select ANTENNA POWER d Check for proper antenna power setting e Check the Antenna Power LED If the LED 18 red or blinking green check for a problem with the antenna or the cabling system such as an RF splitter that blocks or short circuits the antenna power DC voltage Check the DC antenna output power voltage See page 9 23 DC antenna output power voltage Repeat steps 1 through 5 of this procedure for the reference unit If the reference unit passes then exchange antenna feeds between the reference unit and the GPS7 unit under test and retest the GPS7 unit under test If the GPS7 unit under test does not receive a GPS signal on a known good antenna then replace the GPS7 module Check diagnostic reported values
62. settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual Troubleshooting Trees AGL7 Analog Genlock Module Troubleshooting Power on the TG700 as follows 1 Connect the power cable to the instrument 2 Wait until the mainframe and the module completely initialize Check that no error messages appear on the display 3 Press the front panel MODULE button Is the AGL7 main menu displayed Replace the module Perform the Functional Check procedures in the user manual Figure 3 6 Troubleshooting procedure 1 TG700 TV Signal Generator Platform Service Manual 3 15 AGL7 Analog Genlock Module Troubleshooting Power off and remove the module then install it into TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the mole TG700 mainframe Refer to Trouble operating correctly shooting in the TG700 TV Signal Generator Platform Service Manual AGL7 module OK Replace the module Figure 3 7 Troubleshooting procedure 2 3 16 TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Module Diagram AGL7 Analog Genlock Module Diagram The following figure shows the AGL7 Genlock module and how it interconnects with the TG700 TV Signal Generator Platform Diagra
63. the GPS antenna is moved a new position must be acquired for correct time information There must be a good antenna feed and the GPS receiver must be locked to at least four GPS satellites for this procedure to complete successfully The unit will require approximately 60 seconds to acquire a new position 1 Navigate to GPS7 GPS SETUP ACQUIRE POSITION and then press the ENTER button 2 Select GPS7 STATUS 3 Wait until the status display shows Locked 4 This process requires four satellites to complete successfully If the signal is marginal the acquisition may take longer If the signal is poor or if there is no signal the acquisition will not finish 9 22 TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance DC antenna output power voltage The GPS7 module is capable of providing power to a GPS antenna Use this procedure to verify that the GPS7 module is providing power correctly 1 2 pie mori 10 11 12 13 Disconnect the antenna from the GPS7 module Connect the voltmeter to the GPS7 Antenna input using a coaxial cable BNC T connector and a BNC to Banana plug adapter Do not connect a terminator at this time The Antenna Power light should be blinking green Make note of the voltmeter reading for later use Set the antenna voltage to 3 3 V Check the voltmeter reading It should be between 3 1 V and 4 0 V Set the antenna voltage to 5 V Check the voltmeter read
64. the total system attenuation factor Use this procedure to adjust the SDI output amplitude 1 10 11 12 Start the TG700 in factory mode a Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously then release the MODULE and FORMAT buttons Continue to hold the FRONT PANEL ENABLE button until you see the Startup with Factory Mode message then release the button Connect the 50 cable from the HD3G7 TRIGGER OUTPUT connector using the BNC to SMA adapter with or without the 6 dB attenuator to the oscilloscope Trigger Direct input Connect the 1 m high bandwidth cable from the HD3G7 Signal 1 output to the TCA75 adapter in the left port of the 80A03 Press the TG700 MODULE button until HD3G7 STATUS appears in the display If necessary press the up or down arrow buttons to choose CALIBRATION If necessary use the left lt 4 or right gt arrow buttons to select Output 1 to adjust the Signal 1 output and then press the ENTER button Press the right arrow button to select 20 Bits Square and then press the ENTER button If necessary set the oscilloscope Time Div 2 ns Volts Div 50 mV Averaging 16 Record Length 4000 points On the oscilloscope select Measurement 3 Pulse Amplitude and then Amplitude to measure the amplitude on the flat part of the long pulse Right click on the measurement readout and select Show Statistics from the pop up menu 800 Calcula
65. the up A or down V arrow button to select SIGNAL e Press the left amp or right amp arrow button to select 40 Flat Field and press the ENTER button 9 Locate variable resistor R807 on the DVG7 circuit board See Figure 8 2 10 Adjust R807 so that the signal amplitude is equal to the height between two cursors set in step 6 This completes the output level adjustment procedures 8 6 TG700 TV Signal Generator Platform Service Manual DVG7 Digital Video Generator Maintenance DVG7 Digital Video Generator Maintenance This section contains instructions and procedures for maintaining the DVG7 Generator module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 8 8 m Troubleshooting See page 8 10 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period TG700 TV Signal Generator Platform Service Manual 8 7 DVG7 Digital Video Generator Removal Replacement DVG7 Digital Video Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the DVG7 Gen
66. the warranty period 10 10 TG700 Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Maintenance HD3G7 3 Gb s SDI Video Generator Removal and Replacement This section contains instructions on how to remove and replace the customer replaceable parts of the HD3G7 module Tools Required Table 10 3 Required tools for HD3G7 removal and replacement Tektronix part Name Description number Torque driver Accepts 1 inch screwdriver bits Torque range Standard tool of 5 to 14 in Ib T10 TORX tip TORX driver bit for T10 size screw heads Standard tool P1 Pozidriv tip Pozidriv driver tip for P1 size screw heads Standard tool Flat or Phillips tip Small tip for removing the module from the Standard tool mainframe 9 s inch wrench Wrench or deep nut driver to remove nuts Standard tool from BNC connectors Remove the HD3G7 Module Refer to the Removing a Module section to remove HD3G7 module from the mainframe See page 1 41 Removing a Module Disassembly Disassembly of the HD3G7 HD 3 Gb s SDI Video Generator module is a straightforward process and can be easily accomplished Refer to the illustration in the Replaceable Parts List if necessary See Figure 10 5 on page 10 23 Make sure to retain all the screws fasteners and fittings for reassembly NOTE The Input and Output circuit boards can only be separated from the Main board after the entire circuit board assembly has been remo
67. then release the MODULE and FORMAT buttons Continue to hold the FRONT PANEL ENABLE button until you see the Startup with Factory Mode message then release the button Allow the instrument to warm up for a minimum of 20 minutes Press the MODULE button until GPS7 STATUS appears Check that the signal status shows Locked Pi E Check that signal lock indicator displays Fine a Press the up arrow button to select DIAGNOSTICS b Press the ENTER button c Press the right gt arrow button to select TUNE d Check that Fine is showing on the right side of the LCD display 8 Press the MODULE button until TG700 appears 9 Press the up arrow button to select UTILITY 10 Press the ENTER button 11 Press the up arrow button to select CAL OVEN SELECT 12 Press the right arrow button to access the Gain Calibration submenu 13 Press the ENTER button to calculate the gain value 14 Wait approximately 20 seconds for the process to end 15 The result is displayed and should be between 125 and 185 If it is close to the ends of this range the oscillator may need servicing 16 Press the ENTER button to return TG700 TV Signal Generator Platform Service Manual GPS7 Adjustment Procedures 17 Press the CANCEL button to exit the calibration menu when the calibration is complete 18 Wait an additional 2 minutes for the loop to fully recover before returning the TG700 to service TG700 TV Signal Ge
68. type or model number Instrument serial number Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Tektronix part numbers contain two digits that show the revision level of the part For most parts in this manual you will find the letters XX in place of the revision level number Part Number Revision Level Revision Level May Show as XX A oS 670 7918 03 670 7918 XX When you order parts Tektronix will provide you with the most current part for your product type serial number and modification if applicable At the time of your order Tektronix will determine the part number revision level needed for your product based on the information you provide Modules can be serviced by selecting one of the following three options Contact your local Tektronix service center or representative for repair assistance Module exchange In some cases you may exchange your module for a remanufactured module These modules cost significantly less than new modules and meet the same factory specifications For more information about the module TG700 TV Signal Generator Platform Service Manual 1 31 TG700 Mainframe Replaceable Parts List exchange program call 1 800 833 9200 Outside North America contact a Tektronix sales office or distributor see the Tektronix Web s
69. upper CH 3 connector to the upper CH 1 connector on the AWVG7 Generator module Press the left lt 4 or right gt arrow button to select 700 397mV and then press the ENTER button Locate variable resistors R851A coarse and R851B fine on the AWVG7 circuit board See Figure 6 2 Adjust R851A and R851B so that the output gain is 700 4 mV 1 mV Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AWVG7 Generator module Locate variable resistors R751A coarse and R751B fine on the AWVG7 circuit board See Figure 6 2 Adjust R751A and R751B so that the output gain is 700 4 mV 1 mV Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AWVG7 Generator module Locate variable resistors R651A coarse and R651B fine on the AWVG7 circuit board See Figure 6 2 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Adjustment Procedures 21 Adjust R651A and R651B so that the output gain is 700 4 mV 1 mV 22 Move the BNC cable from the upper CH 3 connector to the upper CH 2 connector on the AWVG7 Generator module 23 Select the DAC Gain YPbPr 0 mV calibration signal for CH 2 and CH 3 as follows a Press the CANCEL button to display the CALIBRATION menu b Press the left lt 4 or right gt arrow button to select DAC Gain YPbPr and then press the ENTER button c Press the left lt 4 or
70. user manual Figure 2 2 Troubleshooting procedure 1 2 6 TG700 TV Signal Generator Platform Service Manual AG7 Audio Generator Troubleshooting Power off and remove the module and then install it into the TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the TG700 mainframe Refer to Trouble operating correctly shooting in the 76700 TV Signal Generator Platform Service Manual Is the module module OK Replace the module Figure 2 3 Troubleshooting procedure 2 TG700 TV Signal Generator Platform Service Manual 2 7 AG7 Audio Generator Diagram AG7 Audio Generator Diagram The following figure shows the AG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the TG700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the Generator module is located in the AG7 Theory of Operation section See page 2 1 AG7 Generator module TG700 mainframe J400 A10 A10 9 gt 6 1 2 Minos Main board 4 77 eo J410 2i Slot 2 4 77 0 J420 5 6 9 lt z Rear panel 77 P010 connectors CO e J430 7 8 9 lt 3 SILENCE 795 e 1 48 2
71. weather conditions The module is not waterproof CAUTION To avoid damage to this module do not expose it to sprays liquids or solvents Do not flex the circuit board if you remove the board from its mounting shield The circuit board can be damaged by flexing The shield provides necessary structural support to the circuit board Clean the mainframe and modules often enough to prevent dust or dirt from accumulating Refer to nspecting and Cleaning Procedures Check module performance after each 2000 hours of operation or every 12 months This helps ensure maximum performance and assists in locating defects that may not be apparent during regular operation Performance verification procedures can be found in the 7G700 Signal Generator Platform Specifications and Performance Verification Technical Reference TG700 TV Signal Generator Platform Service Manual xxi Maintenance for Generators and Modules Repackaging Instructions Use the following instructions to prepare your instrument for shipment to a Tektronix Inc Service Center 1 Attach a tag to the instrument showing the owner complete address and phone number of someone at your firm who can be contacted the instrument serial number and a description of the required service 2 Package the instrument in the original packaging materials If the original packaging materials are not available follow these directions a Obtain a carton of corrugated cardboard having
72. 0 mainframe through the Ethernet network Send the ping command to the 700 mainframe to verify that the instrument can communicate with the network Send the ping command to the 700 mainframe to verify that the instrument can communicate the network with the network Can the instrument communicate with Replace the A10 Main board Yes Can the instrument communicate with the network Replace the power supply module Figure 1 11 Troubleshooting procedure 2 1 26 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Troubleshooting TP880 VCC a J630 J620 J610 J600 TP890 GND Figure 1 12 A10 Main board view from top TG700 TV Signal Generator Platform Service Manual 1 27 TG700 Mainframe Diagrams TG700 Mainframe Diagrams This section contains the following diagrams Block diagram of the TG700 Interconnect diagram of the TG700 The Block diagram shows the modules and functional blocks in the TG700 The Interconnect diagram shows how the modules in the TG700 connect together 1 28 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Diagrams A20 Front Key Board LCD Module A10 Main Board D
73. 18 Table 10 8 HD3G7 HD 3 Gb s SDI Video Generator replaceable parts 10 22 Table 10 9 HD3G7 main board replaceable parts 0 000 10 24 Table 11 1 Required tools for removal and replacement of HDLG7 HD Dual Link Video Generator 11 4 Table 11 2 Equipment required for HDLG7 HD Dual Link Video Generator troubleshooting 11 6 Table 11 3 HDLG7 HD Dual Link Video Generator replaceable parts 11 10 Table 12 1 Equipment required for HDVG7 HDTV Digital Video Generator adjustment procedures 12 3 Table 12 2 Required tools for removal and replacement of HDVG7 HDTV Digital Video iG DC 12 8 Table 12 3 Equipment required for HDVG7 HDTV Digital Video Generator troubleshooting 12 10 Table 12 4 HDVG7 HDTV Digital Video Generator replaceable 12 14 TG700 TV Signal Generator Platform Service Manual xi General Safety Summary General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures To Avoid Fire or Personal Use proper power cord Use only the power cord specified for this product and Injury c
74. 35A so that the signal amplitudes from 500 kHz to 5 MHz are at the same level Readjust C635A and R6354 so that the differences of the signal amplitudes from 500 kHz to 5 MHz are within 2 mV TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustment Procedures Interchannel Delay Adjustment Preparation perform the interchannel adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable capacitors on the AVG7 circuit board See Figure 5 11 C737A C837A Figure 5 11 Location of the variable capacitors for the interchannel delay adjustment Procedure WARNING To avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Da
75. 4 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4MML 8 119 B143 00 1 FILTER RF1 3A 250VAC 0 5MA 0 150HM 50 60HZ ZUB2203H F 9 119 B059 00 1 FAN TUBE AXIAL 119 B055 00 W CONN 10CML 10 220 172 01 1 NUT PLATE POWER SUPPLY FAN AL 11 220 0193 00 1 NUT PLAIN HEX M4X7MM HEX STL ZN C 12 210 0008 00 1 WASHER LOCK 8 INTL 0 02 THK STL CD PL 13 119 B054 00 1 POWER SUPPLY INPUT 85 264VAC OUTPUT 5VDC 20A LEA100F 5 14 342 A142 01 1 INSULATOR PLATE POWER SUPPLY PC 15 671 B083 00 1 CIRCUIT BOARD ASSY A30 POWER 389 033 WIRED 16 211 A245 01 11 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 17 200 514 00 1 COVER TOP POWER SUPPLY AL 18 174 019 00 1 ASSY SP ELEC 0 N 9 N 10CM L 19 174 B789 00 1 CA ASSY SP ELEC 10 28AWG 30CM L FLAT 20 174 B788 00 1 CA ASSY SP ELEC 8 18AWG 10CM L 2 N 21 671 B084 51 1 CIRCUIT BOARD ASSY A40 LAN CONNECT 389 B034 XX WIRED 22 334 1378 03 1 MARKER IDENT MKD SERIAL NO FOR SONY TEK 1 38 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List Figure 1 18 Power supply module 1 39 TG700 Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List Table 1 11 Blank panel replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 1 19 614 A021 00 1 PANEL BLANK AS
76. 5 AG7 Generator module exploded View 2 70 2 2 2 20 0 202 227222 2 10 Figure 3 1 Simplified block diagram of the AGL7 Genlock 2 3 2 Figure 3 2 AGL7 circuit board view 3 4 Figure 3 3 Equipment connection for adjusting the output offset and 3 5 Figure 3 4 Timing relationship between and 2 5 2 3 9 Figure 3 5 Dressing the AGL7 BNC 2 2 3 13 Figure 3 6 Troubleshooting procedure 1 2 3 15 Figure 3 7 Troubleshooting procedure 2 22 2 3 16 Figure 3 8 AGL7 Genlock module connections 2 2 2 2 3 17 Figure 3 9 AGL7 Genlock module exploded view 90 2 2 0 3 19 Figure 4 1 Simplified block diagram of the ATG7 Generator 4 1 Figure 4 2 Troubleshooting procedure 1 212 2 2 4 6 Figure 4 3 Troubleshooting procedure 2 2 22 menn 4 7 Figure 4 4 ATG7 Generator module 0 2 22 4 8 Figure 4 5 ATG7 Generator module exploded 32 002222020222 4 10 Figure 5 1 Simplified block diagram of the AVG7 Gen
77. 7 Black Generator Replaceable Parts List BG7 Black Generator Replaceable Parts List This section contains a list of the replaceable modules for the BG7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations Table 7 4 BG7 Black Generator replaceable parts Abbreviations conform to American National Standard ANSI Y 1 1 1972 Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description T 8 116 A003 01 1 EXCHANGE MODULE BG7 116 A004 01 1 EXCHANGE MODULE BG7 CB 7 8 1 441 269 02 1 CHASSIS MODULE AGL7 ASSY 2 333 406 00 1 PANEL REAR BG7 AL 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL N1 PL CROSS REC amp SLOTTED 5 348 A128 00 E SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 6 174 B851 00 4 CABLE ASSY RF 750HM COAX RG179 5 5CM L BNC TO MCX 7 211 245 01 5 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY
78. 700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance measurement shows that the supplies are correct then the GPS7 module is not measuring them correctly Replace the GPS7 module PHASE DET RAMPS Up A Up B PHASE DET RAMPS Down A Down B These four values show critical values in the phase detector The values may vary from unit to unit as a result of the auto calibration that adjusts them but if all the power supplies are good and any of the ramp diagnostics indicate WARN for Warning then replace the GPS7 module Power supply test There are two types of power supplies in the GPS7 module those supplied by the TG700 mainframe and those that are derived on the GPS7 from the mainframe supplies The ones supplied by the mainframe are fused on the GPS7 module they have an M at the start of the supply name See Table 9 6 Derived supplies depend on the mainframe supply fuses for protection Access To perform the power supply tests you must first remove the TG700 top cover See page 1 15 Top Cover Then use the following flowchart and table of power supply test points to determine if the GPS7 power supply is operating correctly See Figure 9 3 See Table 9 6 Measure Supplies Return Mainframe for repair Return GPS7 for repair Derived Supply Missing Power Supplies Figure 9 3 GPS7 power supply test TG700 TV Signal Generator Platfo
79. 700 TV Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List Table 1 7 Main chassis replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 1 15 1 390 A086 03 1 CABINET TOP ASSY 2 211 A245 00 2 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 3 348 A128 00 15 SHLD GASKET ELEK FINGER TYPE 5 1MMX6 4MM W BE CU 97 645 02 4 351 0104 03 1 SL SECT DWR EXT 12 625 L W O HARDWARESAFETY 5 212 041 00 8 SCREW MACHINE M4X8MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 6 211 A245 01 7 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 7 161 0216 00 1 CABLE ASSY PWR 3 18 AWG 2 5M L BLACK SAFETY CONTROLLED STANDARD ACCESSORY Front panel unit Main frame Figure 1 15 Main chassis TG700 TV Signal Generator Platform Service Manual 1 33 TG700 Mainframe Replaceable Parts List Table 1 8 Main frame replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 1 16 116 0586 03 1 EXCHANGE MODULE TG700 116 1099 03 1 EXCHANGE MODULE TG700 FP 1 16 1 441 A262 00 1 CHASSIS MAIN ASSY 2 671 5802 02 1 CIRCUIT BD ASSY A10 MAIN 389 B031 XX WIRED 671 5803 02 1 CIRCUIT BD ASSY A10 MAIN OPT 389 B031 XX WIRED 3 211 A245 01 8 SCREW MACHINE M3X6MM L PNH S
80. A Frame Pulse CPU amp Memory Converter Oscillator Generator DC DC Network Converter Interface Module A30 Power Connect Module Slots Board m Power Suppl Board EPA UJ 10 BASE T RFI Filter Figure 1 13 TG700 block diagram TG700 TV Signal Generator Platform Service Manual 1 29 TG700 Mainframe Diagrams A20 Front Key Board J100 167 W500 LCD Module 2 147 600 A40 Main Board J100 A30 Power Connect Board Module Slots 10 w400 9 7 w300 W100 RFI Filter 10 BASE T 2 Figure 1 14 TG700 interconnect diagram 1 30 TG700 Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List TG700 Mainframe Replaceable Parts List This section contains a list of the replaceable modules for the TG700 mainframe Use this list to identify and order replacement parts Parts Ordering Information Part Number Revision Level Module Servicing Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements Therefore when ordering parts it is important to include the following information in your order Part number see Part Number Revision Level below Instrument
81. After Adjust Value x Total System Attenuation Factor Record the corrected value in the Calculated corrected value row After Adjustment column of the SDI Output Amplitude table See Table 10 2 Press the Cancel button to exit Channel 1 Calibration mode Move the 1 m high bandwidth cable from the HD3G7 Signal 1 output to the Signal 2 output Use the left lt 4 or right P arrow buttons to select Output 2 to adjust the Signal 2 output and then press the ENTER button Press the right arrow button to select 20 Bits Square and then press the ENTER button Repeat steps 12 through 20 for the Signal 2 output Cycle the power on the TG700 to return the generator to normal operating mode TG700 TV Signal Generator Platform Service Manual 10 9 HD3G7 HD 3 Gb s SDI Video Generator Maintenance HD3G7 HD 3 Gb s SDI Video Generator Maintenance This section contains instructions and procedures for maintaining the HD3G7 module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 10 11 m Troubleshooting See page 10 13 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during
82. BG7 AVG7 DVG7 10 14 TG700 TV Signal Generator Platform Service Manual Problem Identification HD3G7 HD 3 Gb s SDI Video Generator Maintenance If there is a problem first perform the HD3G7 Performance Verification procedure found in the 7G700 TV Signal Generator Platform Specifications and Performance Verification manual available on the Web at www tektronix com manuals Any problems found with that procedure can be a starting point for troubleshooting General problems and actions to follow are shown in the following table Table 10 5 HD3G7 troubleshooting Problem Actions Fails Power On Self Test POST HD3G7 does not appear in menu Run power on test procedure Run power on in Factory mode test procedure Check for current software Run power supply test Perform swap modules procedure No output from Signal BNCs No signal at Trigger Output BNC CRC Errors in converter mode Run power on test procedure Check diagnostics reported values Run power supply test Verify configuration Perform swap modules procedure Check diagnostics reported values Run Test Multiple Frame Rate procedure Verify configuration Check diagnostics reported values Run converter mode test procedure Run Check diagnostics procedure Generator video color errors Generator Mode Unstable video Excessive jitter Verify configuration Perform swap mod
83. Black Generator Adjustment Procedures Select the DAC Gain 1 000V DC calibration signal for BLACK 1 through BLACK 4 as follows a Press the left lt 4 or right gt arrow button to select BLACK 1 and then press the ENTER button b Press the left lt 4 or right gt arrow button to select CAL DAC Gain 1 000V DC and then press the ENTER button c Press the CANCEL button d Repeat parts a through c of this step to select the calibration signal for BLACK 2 through BLACK 4 Locate variable resistor RA81 on the BG7 circuit board See Figure 7 2 Adjust R481 so that the output gain is 1 V 1 mV Change the BNC cable connection from the BLACK 1 connector to the BLACK 2 connector on the BG7 Generator module Locate variable resistor R581 on the BG7 circuit board See Figure 7 2 Adjust R581 so that the output gain is 1 V 1 mV Change the BNC cable connection from the BLACK 2 connector to the BLACK 3 connector on the BG7 Generator module Locate variable resistor R681 on the BG7 circuit board See Figure 7 2 Adjust R681 so that the output gain is 1 V 1 mV Change the BNC cable connection from the BLACK 3 connector to the BLACK 4 connector on the BG7 Generator module Locate variable resistor R781 on the BG7 circuit board See Figure 7 2 Adjust R781 so that the output gain is 1 V 1 mV TG700 TV Signal Generator Platform Service Manual 7 5 BG7 Black Generator Adjustment Procedures
84. C female to dual banana adapter 75 coaxial termination Figure 5 3 Equipment connection for adjusting the output offset and gain 2 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously and then release the MODULE and FORMAT buttons to restart the instrument in Factory mode Continue holding down the FRONT PANEL ENABLE button until the TG700 Startup with Factory Mode message appears TG700 TV Signal Generator Platform Service Manual 5 5 AVG7 Analog Video Generator Adjustment Procedures 5 6 10 11 12 13 14 15 16 17 18 19 20 21 Select the DAC Gain GBR 0 mV calibration signal as follows a Pressthe MODULE button to display the AVG7 main menu b Press the up A or down V arrow button to select CALIBRATION c Press the left lt 4 or right amp arrow button to select DAC Gain GBR and then press the ENTER button d Press the left lt 4 or right gt arrow button to select OmV and then press the ENTER button Locate variable resistor R856A on the AVG7 circuit board See Figure 5 2 Adjust R856A so that the output offset is 0 V 1 mV Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AVG7 Generator module Locate variable resistor R756A on the AVG7 circuit board See Figure 5 2 Adjust R756A so that the output offset is 0 V 1 mV Move the BNC cable from the upper CH 2 connector to the upper CH 3 con
85. C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance Access When adjusting the output level you need to remove the top cover of the TG700 mainframe See page 1 15 Top Cover Equipment Required The following table lists the equipment required to adjust the output level Table 8 1 Equipment required for DVG7 Digital Video Generator adjustment procedures Item No Minimum requirement Recommended equipment TV signal generator platform 1 Tektronix TG700 Oscilloscope 1 Bandwidth 1 GHz or higher Tektronix TDS784D 75 Q BNC cable 1 Length 42 inches Tektronix part number 012 0074 00 75 coaxial terminator 1 Tektronix part number 011 0102 01 75 0 signal adapter 1 Bandwidth 1 GHz Tektronix AMT75 Amplitude precision 3 dB Output Level Adjustment Preparation perform the output level adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors on the DVG7 circuit board See Figure 8 2 TG700 TV Signal Generator Platform Service Manual 8 3 DVG7 Digital Video Generator Adjustment Procedures Shield R807 R507 Shield case Figure 8 2 DVG7 circuit board view Pro
86. DI IN The following figure shows the HDLG7 module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the 7G700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the HDLG7 module is located in the HDLG7 Theory of Operation section See page 12 1 HDLG7 module TG700 mainframe A10 Main board 9 p 6 H J912 Slot 2 4 J922 1 0 P010 J921 J711 pd 4 6 A10 Main board Figure 11 4 HDLG7 module connections TG700 TV Signal Generator Platform Service Manual HDLG7 HD Dual Link Video Generator Replaceable Parts List HDLG7 HD Dual Link Video Generator Replaceable Parts List This section contains a list of the replaceable modules for the HDLG7 module Use this list to identify and order replacement parts Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 11 3 HDLG7 HD Dual Link Video Generator replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 11 5 1 441 A269 02 1 CHASSIS ASSY MAIN AGL7 AL W GASKET SAFETY CONTROLLED 2 333 4528 00 1 PANEL REAR HDLG7 SAFETY CONTROLLED 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26MM 4 213
87. E 4 Press the left lt 4 or right gt arrow button to select a preset number to save instrument settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual 7 11 Black Generator Troubleshooting Troubleshooting Trees Power on the TG700 as follows For Option CB 1 Connect the power cable to the instrument Power on the TG700 in factory mode and execute 2 Wait until the mainframe and the module completely diagnostics as follows initialize Check that no error messages appear on the display 1 Connect the power cable to the instrument with the 3 Press the front panel MODULE button FRONT PANEL ENABLE button pressed 2 Press the up and down arrow button to select UTILITY and then press the ENTER button 3 Press the up and down arrow button to select DIAGNOSTICS and then press the ENTER button 4 Press the left and right arrow button to select Memory and then press the ENTER button i Is the message Is the BG7 main eu menu displayed Replace the module Fail BG7 Diag error displayed Perform the Functional Check Perform the Functional Check procedures in the user manual procedures in the user manual Figure 7 5 Troubleshooting procedure 1 7 12 TG700 TV Signal Generator Platform Service Manual BG7 Black Generator Tr
88. E M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUTDRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM 5 28 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Replaceable Parts List e rad Figure 5 16 AVG7 Generator module exploded view TG700 TV Signal Generator Platform Service Manual 5 29 AVG7 Analog Video Generator Replaceable Parts List 5 30 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator AWVG7 Analog Wideband Video Generator Theory of Operation Bus Interface Line Memory Address Generator Frame Memory Overlay Controller Overlay Memory D A Converter amp Amp This section describes the basic operation of the major circuit blocks in the AWVG7 Generator module This block provides the communication between the mainframe and the module circuit Line memory holds the actual sample points which define a digital signal This block consists of a frame delay an MPU interface a sequencer an SDRAM controller and a blanking data generator It interfaces the Frame Memory and the Line Memory and controls the output sequence of the video data in these memories Frame memory co
89. ER button c Press the right gt arrow button to select TUNE d Check that Fine is showing on the right side of the LCD display Press the MODULE button until TG700 appears Press the up arrow button to select UTILITY Press the ENTER button Press the up A arrow button to select CAL OVEN SELECT Press the ENTER button to access the Internal Frequency Calibration submenu Press the ENTER button to execute the calibration The resulting value should be between 6 000 and 20 000 If the value is outside this range the oven oscillator may need to be replaced Press the ENTER button to return Press the CANCEL button to exit the calibration menu when the calibration 18 complete TG700 TV Signal Generator Platform Service Manual 9 7 GPS7 Adjustment Procedures 9 8 Gain calibration Perform the following procedure to characterize the oscillator frequency as a function of voltage This adjustment needs to be performed in factory mode and is only needed once to characterize the oscillator CAUTION To avoid signal errors only perform the Gain Calibration when the instrument is out of service This calibration temporarily disrupts the frequency of all signals in the instrument If proceeding from the previous procedure skip to step 8 of this procedure 2 Connect a GPS signal to the antenna input on the rear of the module 3 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously
90. ION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUT DRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM 12 14 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator Replaceable Parts List Figure 12 7 HDVG7 Generator module exploded view am USA TEquip pment An Interworld Highway LLC Company TG700 TV Signal Generator Platform Service Manual 12 15
91. L D n BLACK 1 H Rear panel lt connectors P010 BARS O 50 10 Main board Figure 4 4 ATG7 Generator module connections 4 8 TG700 TV Signal Generator Platform Service Manual ATG7 Analog Test Generator Replaceable Parts List ATG7 Analog Test Generator Replaceable Parts List Abbreviations This section contains a list of the replaceable modules for the ATG7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 4 3 ATG Analog Test Generator replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 4 5 116 A014 00 1 EXCHANGE MODULE ATG7 4 5 1 441 A269 02 1 CHASSIS MODULE 7 55 2 333 427 00 1 PANEL REAR ATG7 AL 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL N1 PL CROSS REC amp SLOTTED 5 348 128 00 En SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 6 174 B851 00 4 CABLE ASSY RF 750HM COAX RG179 5 5CM L BNC TO MCX 7 211 A245 01 5 SC
92. L color bar signals D A Converter amp Amp The block consists of a D A converter two amplifiers and two filters one is for NTSC PAL and another is for HD The D A converter converts the digital data from the Sync Generator to an analog signal and reconstructs the signal for output lt D A Converter Interface Generator 1 amp Amp 1 BLACK 1 Sync D A Converter Generator 2 amp Amp 2 BLACK 2 1 D A Converter Sync D A Converter Generator 4 amp Amp 4 BLACK 4 Option CB only Figure 7 1 Simplified block diagram of the BG7 Generator module TG700 TV Signal Generator Platform Service Manual 7 1 BG7 Black Generator Adjustment Procedures BG7 Black Generator Adjustment Procedures This section contains information needed to adjust the BG7 Generator module Adjustment in the BG7 Generator module are for the output offset output gain and luminance gain Requirements for Adjustment Before doing the adjustment note the following requirements Personnel This procedure is only to be performed by trained service technicians Warm Up Period BG7 Generator module requires a 20 minute warm up time in a 20 C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance Access When adjusting the blanking luminance and chrominance levels you need to remove the top cover of the TG700 mainfram
93. L7 Genlock module 7 Locate variable resistor R491 on the AGL7 circuit board See Figure 3 2 TG700 TV Signal Generator Platform Service Manual 3 5 AGL7 Analog Genlock Adjustment Procedures 10 11 12 13 14 15 16 17 18 19 20 3 6 Adjust R491 so that the output offset is 0 V 1 mV Move the BNC cable from the BLACK 2 connector to the BLACK 3 connector on the AGL7 Genlock module Locate variable resistor R591 on the AGL7 circuit board See Figure 3 2 Adjust R591 so that the output offset is 0 V 1 mV Select the DAC Gain 1 000V DC calibration signal for BLACK 1 through BLACK 3 as follows a Press the left amp or right gt arrow button to select BLACK 1 and then press the ENTER button b Press the left lt 4 or right gt arrow button to select CAL and then press the ENTER button c Press the left lt 4 or right gt arrow button to select DAC Gain 1 000V DC and then press the ENTER button d Press the CANCEL button twice to return the AGL7 main menu e Repeat parts a through d of this step to select the calibration signal for BLACK 2 BLACK 3 uses the previous setting same as BLACK 2 Locate variable resistor R681 on the AGL7 circuit board See Figure 3 2 Adjust R681 so that the output gain is 1 V 1 mV Move the BNC cable from the BLACK 1 connector to the BLACK 2 connector on the AGL7 Genlock module Locate variable resistor R481 on the AGL7 c
94. M HEAD HEIGHT 2MM BRIGHT NICKEL FINISH STEEL SLOTTED PHILLIPS 5 348 A128 00 eu SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 6 131 6383 00 116 A001 03 6 CONN RF JACK BNC 500HM FEMALE STR SNAP IN PNL MTG 12 5MM 131 1315 01 116 A001 04 116 A001 04 6 CONN RF JACK BNC PNL 50 OHM FEMALE STR PELTOLA PNL MNT SILVER ALLOY 0 576 MLG X 0 366 TERMN 0 375 32 THD D FLAT Attached Parts 210 0012 00 STAR WASHER 220 0495 00 NUT 131 8257 00 116 A001 05 6 CONNECTOR PANEL MOUNT BNC TO MCX 7 211 245 01 4 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 8 174 A278 00 116 A001 03 6 CA ASSY RF 75 OHM COAX 120MM L BLACK QQB 0120 0 174 5660 00 116 A001 04 116 A001 04 6 ASSY RF 50 OHM COAX 6 0INCH LENGTH PELTOLA TO RA MCX AG7 174 5660 01 116 A001 05 6 ASSY RF 50 OHM COAX 6 0INCH LENGTH MCX TO RA MCX AG7 9 334 1378 03 MARKER IDENT MKD SERIAL NO TG700 TV Signal Generator Platform Service Manual 2 9 AG7 Audio Generator Replaceable Parts List STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A042 00 1 NUTDRIVER BOX 11MM HEX BNC RETAINING NUT MODIFIED 14 5MM Figure 2 5 AG7 Generator module exploded view 2 10 TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Module AGL7 Analog Genlock Module Theory of Operat
95. PG M3X8MM L PNH STL BLK ZN PL CROSS PTP3X8ZB 12 213 1127 00 2 SCREW TPG M3X8MM L PNH STL BLK ZN PL CROSS REC PTP3X8ZB 13 174 B790 00 1 CA ASSY SP ELEC 16 28AWG 20CM L FLAT 14 174 B791 00 1 CA ASSY SP ELEC 14 28AWG 15CM L FLAT 15 671 082 00 1 CIRCUIT BOARD ASSY A20 FRONT KEY 389 B032 XX WIRED 16 348 A120 00 33 GASKET SHIELD CONDUCTIVE URETHANE FORM 2MMX4MM W ADHESIVE CM E028040020 17 348 A132 00 8 GASKET SHIELD CONDUCTIVE URETHANE FORM CM STRIP 7MMWX1MMT W ADHESIVE TAPE 1 36 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List Figure 1 17 Front panel unit 1 37 TG700 Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List Table 1 10 Power supply module replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 1 18 650 A810 00 1 COMPONENT KIT POWER SUPPLY W CARTON TG700 1 18 1 441 A263 00 1 CHASSIS P S ASSY 2 333 A041 00 1 PANEL REAR POWER SUPPLY AL 3 211 A256 00 4 SCREW MACHINE M3X40MM L PNH STL NI 055 REC W KOGATAMARU amp LOCK WASHER 4 131 4131 00 1 CONN PLUG ELEC MALE W LOCKING ADPTR EXT MTG 5 211 A266 00 2 SCREW MACHINE M3X12MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 6 213 1129 00 2 SCREW MACHINE M2 5X11MM L PAN HD STL NI PL CROSS REC amp SLOTTED 322401 05 7 21
96. Press the ENTER button d Press the right arrow button until NTSC Burst appears and then press the ENTER button e Press the CANCEL button TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance 5 Configure Black 2 of the GPS7 module to Enable Loop Output from Black 1 Use the up A or down V arrow button to select SELECT OUTPUT b Press the right gt arrow button until BLACK 2 appears and then press the ENTER button c Use the up A or down V arrow button to select LOOP FROM BLACKI d Press the right arrow button until Enable appears and then press the ENTER button e Press the CANCEL button 6 Use the WFM7120 to examine the video Check that the signal level is appropriate The normal level is approximately twice the normal video size Check for clipping or distortion of the signal If the signal level is not appropriate or there is clipping or distortion replace the GPS7 module TG700 TV Signal Generator Platform Service Manual 9 27 GPS7 Module Replaceable Parts List GPS7 Module Replaceable Parts List This section contains a list of the replaceable modules for the GPS7 module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviation
97. Press the MODULE button to display the AWVG7 main menu b Press the up A or down V arrow button to select CALIBRATION c Press the left lt 4 or right amp arrow button to select Frame Timing and then press the ENTER button d Press the left 6 or right amp arrow button to select Frame 0 0 nsec and then press the ENTER button Save the CH 2 waveform on the oscilloscope in Ref1 and then display the saved waveform Select Delay from the Measure menu and then set the oscilloscope to measure the time delay between the Refl and CH 2 waveforms Press the up or down arrow button to select 2 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right gt arrow button to adjust the delay value to 2 0 ns Press the up A or down V arrow button to select 10 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right arrow button to adjust the delay value to 10 0 ns Press the up A or down V arrow button to select 22 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right arrow button to adjust the delay value to 22 0 ns Press the CANCEL button to return the CALIBRATION menu Press the left lt 4 or right f arrow button to select Clock Timing and then press the ENTER button Move CH 1 probe from TP200 to TP202 Move Ch 2 probe from TP210 to TP212 Press the up or down a
98. REW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUTDRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM TG700 TV Signal Generator Platform Service Manual 4 9 ATG7 Analog Test Generator Replaceable Parts List Figure 4 5 ATG7 Generator module exploded view 4 10 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator AVG7 Analog Video Generator Theory of Operation Bus Interface Line Memory Address Generator Frame Memory Overlay Controller Overlay Memory D A Converter amp Amp This section describes the basic operation of the major circuit blocks in the AVG7 Generator module This block provides the communication between the mainframe and the module circuit Line memory holds the actual sample points which define a digital signal This block consists of a frame delay an MPU interface a sequencer an SDRAM controller and a blanking data generator It interfaces the Frame Memory and the Line Memory and controls the output sequence of the video data in these memories Frame memory contains a series of pointers that control the order the video lines stored in the Line Memory are used to produce digital signals
99. Rear Panel Connectors and Chassis 444 4 2 2 4 8 8 DVG7 Digital Video Generator Troubleshooting 2 00 00 0 70 22 8 10 Equipment Required eerte Ren 8 10 Backing Up the Instrument 8 10 TProubleSHOGUNG 1665 E 8 11 DVG7 Digital Video Generator Diagram sss eee e ene 8 13 DVG7 Digital Video Generator Replaceable Parts 1184 2 2 2 8 14 GPS7 GPS and Genlock Module with Timecode GPS7 Theory of sve E eris des PODES 9 1 GPS7 Adjustment A EANNA EN ENEE 9 4 Requirements for 2 2 9 4 Equipment Reg ired eiie i 9 4 GPS7 Black Burst 2 2 2 22 2 24 EE ar eee ee 9 5 Mainframe Oscillator Adjustments 2 2 2 0 9 7 GPS7 Module Maintenance oeste torte E eee ee EpL EUR A E Fre HOM D Ee exe puede Rd 9 10 GPS7 Module Removal and 2 een 9 10 GPS7 Troubleshooting erci PIE De ES ETUR V 9 13 GPS7 Module Replaceable Parts 1184 2 2 2
100. SY TG700 W GASKET amp LOCK SCREW 1 19 1 333 A411 00 1 CHASSIS MODULE BLANK ASSY 2 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26MM SUS304 5 4MM L 3 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL NI PL CROSS REC amp SLOTTED 4 348 A128 00 2 5 SHLD GASKET ELEC FINGER TYPE 5 1 MM LX6 4MM W BE CU 97 645 05 CM Figure 1 19 Blank panel Table 1 12 Standard and optional accessories for TG700 mainframe Component Tektronix Serial no Serial no number part number effective discont d Qty Name amp description STANDARD ACCESSORIES 351 0751 XX 1 TRK SL OUT SECT STATIONARY amp INTERMEDIATE SAFETY CONTROLLED 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD 071 1970 XX 1 MANUAL TECH USERS 161 0216 00 1 CABLE ASSY PWR 3 18 AWG 2 5M L BLACK STANDARD ONLY OPTIONAL ACCESSORIES 614 A021 XX 1 BLANK PANEL 1 40 TG700 TV Signal Generator Platform Service Manual Removing a Module Removing a Module To remove a module from the mainframe perform the following procedure CAUTION To make module removal easier attach terminations or BNC cables to the module connectors The connectors may be damaged if too much force is applied during module removal 1 Unplug the power cord from the power connector on the mainframe rear panel 2 Attach 75 terminations or BNC cables to the BNC connectors on the module to be removed Module removal becomes easier if the terminations or cables are attached
101. TL N1 PL CROSS REC W KOGATAMARU amp LOCK WASHER 4 348 A130 00 96 cm GASKET SHIELD CONDUCTIVE URETHANE FORM STRIP 5MM WX0 5MM T WITHOUT ADHESIVE 5 348 A132 00 24 cm GASKET SHIELD CONDUCTIVE URETHANE FORM STRIP 7MM WX1MM W ADHESIVE 6 348 A132 00 42 cm GASKET SHIELD CONDUCTIVE URETHANE FORM STRIP 7MM WX1MM W ADHESIVE 7 348 A559 51 1 MARKER IDENT MKD WARNING 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO 9 348 A133 00 20 cm GASKET SHIELD CONDUCTIVE URETHANE FORM STRIP 5 5MM WX13MM 1 34 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Replaceable Parts List Table 1 9 Front panel unit replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 1 17 1 426 A165 00 1 FRAME FRONT ASSY 2 119 053 01 1 LCD MODULE LCD W CONN 3 211 A245 01 4 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 4 200 A513 01 1 COVER FRONT PC CONDUCTIVE COATED TG700 5 378 A047 01 1 FILTER LCD ACRYLIC TG700 6 333 A400 01 1 PANEL FRONT LEXAN TG700 7 213 A245 00 1 THUMBSCREW 10 32UNFX21 6MM L 10 3MM OD HD STL W NYLON WASHER 8 361 A174 00 1 SPACER 8MM ODX3MM L POLYACETATE HIROSUGI KEIKI CZ 503 9 354 A054 00 1 RING RETAINING EXT TYPE E U O 3 0 MM DIA GROOVE SST 1110201 11040 10 260 147 00 1 SWITCH RUBBER SILICON TG700 11 213 1127 00 4 SCREW T
102. The flash memory holds the firmware data and signal data output from modules For the Option FP another 32 MB flash memory is added to hold frame picture data The block converts the digital data received from the AGL7 Analog Genlock module to analog voltage This block generates four clock signals and supplies them to the installed modules a 54 MHz master clock signal a 14 43 MHz clock signal for D2 a 74 25 MHz or a 74 25 1 001 MHz clock signals for HD and a 12 288 MHz clock signal for Audio The master clock signal is generated from the 13 5 MHz OCXO with high accuracy The frequency is controlled by the 16 bit D A converter This block generates three frame pulses used for multi format signal generation This block provides the interface between the TG700 and the installed modules It provides CPU related signals such as data bus and address bus clock signals power and other control signals to the modules This block converts the 5 V power supplied by the Power Supply module to 5 V 3 3 V 8 V and 12 V This block controls the Ethernet interface The TG700 has a 10 BASE T port on the rear panel TG700 TV Signal Generator Platform Service Manual 1 1 TG700 Mainframe Theory of Operation Power Supply Module The Power Supply module derives the 5 V power supply voltages from the line and supplies it to the A10 Main board 1 2 TG700 TV Signal Generator Platform Service Manual TG700 Adjustment Procedures TG700
103. There are several internally detected physical measurements which are reported by the GPS7 module Check the following see the TG700 User manual for detailed procedures Temperature Temperature is detected on the Trimble GPS receiver board This temperature is normally about 15 C above ambient temperature If the temperature is very high or low check that the fan is operating the installation clearances are correct and that all cables in the GPS7 module are connected properly If there is still a problem replace the GPS7 module Tune Phase The Phase value indicates the second by second differences between the Pulse per Second PPS signal from the GPS receiver and the Local 1 PPS signal from the Master Time of Day clock At lock this signal should be near hex 8000 0000 Tune DAC This indicates the current value written to the DAC on the Main board that controls the Oven Oscillator The legal range for this value is 0 to 32 767 but when locked the value should be in the range of 6 000 to 20 000 to allow for fast locking and drift compensation If the unit locks well but these values are out of this range then replace the Main board Voltage Mon 1 5V 8V Voltage Mon 2 5V rel to 3 3V The voltage monitors measure the mainframe supplies If the display indicates they are out of range then check them manually See page 9 19 Power supply test If one of these supplies is bad then replace the Main board If manual TG
104. a Press the MODULE button to select GPS7 b Use the up A or down arrow buttons to select SELECT OUTPUT c Press the left lt 4 or right gt arrow buttons to select BLACK 3 Press the ENTER button to confirm this selection d Ifnecessary press the up or down V arrow buttons to choose SELECT FORMAT e Use the left 4 or right f arrow buttons to choose CW 10 MHz Press the ENTER button to confirm this selection f Measure the frequency accuracy directly At 10 MHz 1 ppm 10 Hz so a measured frequency of 10 000 010 Hz is 1 ppm high 9 24 TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance 7 Ifthe difference is gt 1 ppm then the mainframe may need calibration or the oven may not be able to tune to the correct frequency 8 Ifthe GPS7 module will lock to GPS then perform an oven calibration See page 9 7 Internal frequency calibration If that fixes the problem then the system is functioning correctly 9 Ifthe GPS7 module will not lock but you have an AGL7 module you can perform an oven calibration using that module If that works then the mainframe oven is functioning correctly 10 If the internal frequency is gt 3 ppm off or steps 8 or 9 are not able to calibrate it to the correct frequency then replace the mainframe ADC bus diagnostics Perform this procedure to determine if all the bits on the ADC are properly connected to the FPGA logic NOTE ADC bus di
105. a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a screwdriver with a 2 Phillips tip to install the six screws securing the circuit board to the chassis Apply the rear panel to the chassis and then install all the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual 12 9 HDVG7 HDTV Digital Video Generator Troubleshooting HDVG7 HDTV Digital Video Generator Troubleshooting Equipment Required This section contains instructions and procedures for troubleshooting the HDVG7 Generator module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the 7G700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed in the following table is required for troubleshooting Table 12 3 Equipment required for HDVG7 HDTV Digital Video Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings 12 10 Before you begin the troubleshooting procedures create a preset to save your instru
106. a wide bandwidth filter for the HDTV trilevel sync signal Word Clock Generator This block generates a 48 kHz word clock signal TG700 TV Signal Generator Platform Service Manual 3 1 AGL7 Analog Genlock Module Theory of Operation c Bus Interface Genlock Sync Controller REF Separator Amp amp Restorer AID cw Converter Word Clock Generator Black Burst Generator 1 D A Converter amp Amp 1 Black Burst Generator 2 D A Converter amp Amp 2 D A Converter amp Amp 3 Trilevel Sync Generator Figure 3 1 Simplified block diagram of the AGL7 Genlock module 3 2 TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Adjustment Procedures AGL7 Analog Genlock Adjustment Procedures This section contains information needed to adjust the AGL7 Genlock module Adjustments in the AGL7 Genlock module are for the output offset output gain and clock timing Requirements for Adjustment Before doing the adjustment note the following requirements Personnel This procedure is only to be performed by trained service technicians Warm Up Period AGL7 Genlock module requires a 20 minute warm up time in a 20 C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance Access When adjusting the output offset output gain and clock timing you need to r
107. again GPS7 does not lock GPS7 does not acquire satellite Run power on test procedure See page 9 16 Power on self test Check DC antenna power voltage See page 9 23 DC antenna output power voltage Check GPS antenna signal source See page 9 17 Check GPS antenna signal source Check diagnostics reported values See page 9 18 Check diagnostic reported values Swap the module with a known good GPS7 module and try again Unstable GPS lock determined by Performance Verification or through normal use Verify 20 minute warm up then recheck stability relative to reference unit Check GPS antenna signal source See page 9 17 Check GPS antenna signal source Verify configuration See page 9 17 Verify configuration Check diagnostics reported values See page 9 18 Check diagnostic reported values Run Internal Mode Oven test See page 9 24 Internal mode oven test If both units have not acquired position run Acquire New Position procedure Frame phase wrong determined by Performance Verification Time of Day wrong Verify configuration See page 9 17 Verify configuration Check time zone offset configuration and time of day source See the T6700 User manual for directions Check diagnostics reported values See page 9 18 Check diagnostic reported values Run Acquire New Position procedure See page 9 22 Acquire new position No Black Burst outputs
108. agnostics is only available on GPS7 modules with the REF IN connector on the rear panel Ensure nothing is connected to the BLACK 1 REF IN connector Go to the REFERENCE menu of the GPS7 under test Press the ENTER button PO oU qr You should see SOURCE in the menu If you do not press the down V arrow button until it appears 5 Press the right arrow button until Internal appears and then press the ENTER button 6 Press the CANCEL button to exit the menu 7 Press the down VW arrow button until SELECT OUTPUT appears 8 You should see BLACK 1 in the menu If you do not press the left lt 4 arrow button until it appears and then press the ENTER button 9 You should see INPUT OUTPUT in the menu If you do not press the down arrow button until it appears 10 You should see OUTPUT if allowed in the menu If you do press the ENTER button If you do not press the right arrow button until it appears in the menu and then press the ENTER button 11 Press the down arrow button until SELECT FORMAT appears in the menu and then press the ENTER button 12 You should see NTSC in the menu If you do press the ENTER button If you do not press the right f arrow button until it appears and then press the ENTER button TG700 TV Signal Generator Platform Service Manual 9 25 GPS7 Module Maintenance 9 26 13 14 15 16 17 Press the right gt arrow button until Black Bu
109. ain menu Repeat parts a through d of this step to select the NTSC Black Burst signal for BLACK 2 Press the left lt 4 or right gt arrow button to select BLACK 3 and then press the ENTER button Press the left lt 4 or right gt arrow button to select 1080 59 94i and then press the ENTER button Press the CANCEL button to return the AGL7 main menu TG700 TV Signal Generator Platform Service Manual 3 7 AGL7 Analog Genlock Adjustment Procedures 3 8 2 Setthe horizontal fine timing for BLACK 1 through BLACK 3 to 0 00 ns as follows 1902 a a Press the up A or down V arrow button to select GENLOCK and then press the ENTER button Press the left lt 4 or right gt arrow button to select INTERNAL and then press the ENTER button Press the CANCEL button to return the AGL7 main menu Press the up A or down V arrow button to select SELECT OUTPUT Press the left lt 4 or right gt arrow button to select BLACK 1 and then press the ENTER button Press the up or down V arrow button to select TIMING and then press the ENTER button Press the up or down V arrow button to select Horizontal Fine and then press the left lt 4 or right arrow button to set the timing to 0 00 ns Press the CANCEL button twice to return the AGL7 main menu Repeat parts e through h of this step to set the horizontal fine timing for BLACK 2 and BLACK 3 to 0 00 ns Attach the two 6139
110. ainframe rear panel BNC T connector 9 eC 7e H O Om a H E ooo f jJ 4 OOS ple 0230 004 BNC female to dual banana adapter GPS7 module 75 Q precision coaxial terminator Figure 9 2 Equipment connections for GPS7 adjustments 3 Press the MODULE button to display the GPS7 main menu TG700 TV Signal Generator Platform Service Manual 9 5 GPS7 Adjustment Procedures 4 Set the Black level Press the up or down V arrow button to select SELECT OUTPUT Press the left lt 4 or right gt arrow button to select BLACK 1 and then press the ENTER button Press the up or down arrow button to select CALIBRATION Press the left lt 4 or right gt arrow button to select AMPLITUDE CALIBRATION and then press the ENTER button Press the left lt 4 or right gt arrow button to select the 0 mV signal Make a note of the voltmeter reading Press the left lt 4 or right gt arrow button to select the 700 mV signal Make a note of the voltmeter reading Subtract the voltage measured in part e of this step 0 mV setting from the voltage measured in part g of this step 700 mV setting If the result is 698 mV or 7702 mV use the up or down arrow buttons to adjust the gain Repeat parts d through 1 of this step until the difference between the two signals is 700 mV 2 mV Press the ENTER button to save the setting and exit the amplitude calibration menu
111. al Generator Platform Service Manual Introduction This manual contains information needed to safely and effectively service the TG700 mainframe and installed modules To prevent personal injury or damage to the mainframe or modules consider the following before attempting service m The procedures in this manual should be performed only by a qualified service person Read the General Safety Summary and the Service Safety Summary See page xii See page xiv When using this manual for servicing be sure to follow all warnings cautions and notes Performance Check Interval Strategy for Servicing Generally the performance check described in the Specifications and Performance Verification manual should be done every 12 months In addition a performance check is recommended after repair The Specifications and Performance Verification manual is available on the Web at www tektronix com If the TG700 mainframe or any installed product modules do not meet performance criteria repair is necessary Throughout this manual the term module appears referring to any field replaceable component or assembly References to a module are different than references to a product module such as AGL7 Genlock module which is a product installed in the TG700 mainframe This manual contains all the information needed for periodic maintenance of the TG700 mainframe and installed product modules Examples of such information are proc
112. ame phase when locked to GPS the instrument times the frame pulses to an Epoch This means they are timed as though they all started on the time indicated by TAI and the proposed SMPTE time of GMT midnight 00 00 00 on January 1st 1958 The video sequences generated by the GPS7 are set to the correct time by calculating the total time from the SMPTE epoch to the present and adjusting the frame reset pulses accordingly The frame reset pulses are used to reset the video generation outputs start position in time The GPS7 has 1 GPI General Purpose Interface input and 2 GPI outputs that can be set up for event triggering or detection as configured by the user These are under SW control via FPGA registers The time code reader operates on the same ADC data as the genlock This data is processed to extract the VITC bits and check for valid CRC and continuity When valid time code is detected the SW reads the time values from the reader circuits The Time Code Reader is only available on GPS7 modules with the REF IN connector on the rear panel TG700 TV Signal Generator Platform Service Manual GPS7 Theory of Operation GPS7 Module receiver board Averaging and loop control receiver registers Local 1 PPS c CPU IO Bus input 2 GPI outputs Black and LTC engine control status HD15 connector 4 LTC outputs 4 Delay Video connectors S
113. and then press the ENTER button to access the UTILITY submenu 4 Press the up A and down V arrow button to select DIAGNOSTICS and then press the ENTER button to access the DIAGNOSTICS submenu 5 Press the left lt 4 or right arrow button to select Memory and then press the ENTER button to execute the memory test 6 Check that the message Pass Install Module s is displayed on the display If the message Fail a module name Diag error is displayed replace the module 1 24 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Troubleshooting Troubleshooting Trees Insert four generator modules DVG7 HDVG7 or BG7 Option CB that are functioning correctly into the TG700 mainframe and then connect the power cable to the AC line connector Is the fan in the Power Supply Replace the power supply module module working Is TP880 on the A10 Main board at 5V Replace the power supply module Do the LEDs and Do the LEDs and No LCD display on the Replace the LCD module LCD display on the front panel light front panel light Run the diagnostics routine Yes Yes No Is Pass All Installed Module s displayed Replace the A10 Main board Figure 1 10 Troubleshooting procedure 1 TG700 TV Signal Generator Platform Service Manual 1 25 TG700 Mainframe Troubleshooting Connect a PC to the TG70
114. and tight Remove the LTC GPI connector from the rear panel Remove the four T10 screws that attach the circuit board to the chassis When reassembling torque these screws to 8 in lb Lift the Main board assembly off of the chassis and set it on a static free work surface TG700 TV Signal Generator Platform Service Manual GPS7 Troubleshooting Required Equipment GPS7 Module Maintenance This section contains instructions and procedures for troubleshooting the GPS7 module These procedures help you decide whether it 1s necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the 7G700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed here 1s needed to troubleshoot the GPS7 module Table 9 3 Equipment required for GPS7 module troubleshooting Equipment Requirement Suggested equipment TG700 mainframe For the GPS7 module under test Tektronix TG700 TG700 mainframe with GPS7 installed Fully functional operating system for Tektronix TG700 with GPS7 module reference Waveform monitor Used to verify correct GPS phase lock Tektronix WFM7120 operation Must be able to lock to a reference and display composite inputs GPS Antenna signal source 2 Good GPS signal required for both the GPS7 under test and the reference unit If only one antenna feed is available a signal splitter may be u
115. and variable resistors R835A R735A and R635A on the AVG7 circuit board See Figure 5 8 11 Turn the LEVEL knob on the peak detector amplifier so that the green LED lights 12 Adjust C835A so that the signal amplitudes of 500 kHz and 5 MHz are at the same level See Figure 5 10 TG700 TV Signal Generator Platform Service Manual 5 15 AVG7 Analog Video Generator Adjustment Procedures Run 12 5kS s Detect SD CHE S 9 V 12 Jun 2002 Gil 2 00mv 5 163128 Figure 5 10 Adjusting the signal amplitudes 13 14 15 16 17 18 19 20 21 22 Adjust R835A so that the signal amplitudes from 500 kHz to 5 MHz are at the same level See Figure 5 10 Readjust C835A and R8354 so that the differences of the signal amplitudes from 500 kHz to 5 MHz are within 2 mV Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AVG7 Generator module Adjust C7354 so that the signal amplitudes of 500 kHz and 5 MHz are at the same level Adjust 735 so that the signal amplitudes from 500 kHz to 5 MHz are at the same level Readjust C735A and R735A so that the differences of the signal amplitudes from 500 kHz to 5 MHz are within 2 mV Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector the AVG7 Generator module Adjust C635A so that the signal amplitudes of 500 kHz and 5 MHz are at the same level Adjust R6
116. anel lt P301 connectors J730B CH 2 lower y 77 J630A CH 3 upper Ce 77 FD J630B CH 3 lower X 77 Figure 5 15 AVG7 Generator module connections TG700 TV Signal Generator Platform Service Manual 5 27 AVG7 Analog Video Generator Replaceable Parts List AVG7 Analog Video Generator Replaceable Parts List This section contains a list of the replaceable modules for the AVG7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 5 4 AVG7 Analog Video Generator replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 5 16 116 A017 00 1 EXCHANGE MODULE AVG7 5 16 1 441 A269 02 1 CHASSIS MODULE AGL7 ASSY 2 333 453 00 1 PANEL REAR AVG7 AL 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL N1 PL CROSS REC amp SLOTTED 5 348 A128 00 SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 6 174 B851 00 6 CABLE ASSY RF 750HM COAX RG179 5 5CM L BNC TO MCX 7 211 A245 01 5 SCREW MACHIN
117. ansactions to and from the GPS7 module Antenna Connector GPS7 module requires an external antenna to receive the GPS time signals from up to 12 satellites The antenna connector applies these signals to the GPS Receiver board GPS Receiver Loop GPS Receiver board block is a Trimble Resolution T module which track up to 12 satellites and extract and average the time information from them The GPS receiver produces a pulse at the rate of 1 pulse per second PPS which is compared to a locally generated pulse per second Local 1 PPS in the Phase Detector block The output from the Phase Detector contains a Quantization Error due to the time sampling method used in the GPS receiver board The GPS receiver also produces a serial data stream detailing the error which can be up to 20 ns that is arithmetically removed from the phase detector output the Quantize Correction path This corrected phase detector output can be seen on the module diagnostic display The corrected phase is first filtered in the averaging and loop control block and then read by software The software then writes this to a DAC on the TG700 mainframe board to control the frequency of the mainframe master oscillator OCXO This frequency control value can also be seen on the module diagnostic display The mainframe OCXO oscillator clocks the GPS7 Master Time of Day MTOD counter This completes the loop spread over the two boards locking the mainfra
118. assis Lift the circuit board up and away from chassis and then place it on a static free surface Use the 11 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away Perform steps 2 through 5 in reverse order to replace the connector Perform the following procedure to replace the chassis 1 Perform steps 1 through 4 in Replacing the Rear Panel Connectors See page 2 3 Use the 11 mm nut driver to remove the nuts from each of the rear panel connectors Set the replacement chassis on a firm flat static free work surface Apply the rear panel to the chassis and then install all the connectors to the chassis Carefully place the AG7 circuit board in place on the chassis Use a screwdriver with a 2 Phillips tip to install the four screws securing the circuit board to the chassis Reconnect all the cables to the rear panel connectors TG700 TV Signal Generator Platform Service Manual AG7 Audio Generator Troubleshooting AG7 Audio Generator Troubleshooting Equipment Required This section contains instructions and procedures for troubleshooting the AG7 Generator module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the TG700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed
119. at J830A upper CH 1 J830B lower CH 1 J730A upper CH 2 J730B lower CH 2 J630A upper CH 3 and J630B lower CH 3 on the AVG7 circuit board 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector 5 22 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Removal and Replacement Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the five screws securing the AVG7 circuit board to the chassis Lift the circuit board up and away from the chassis and then place it on a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a screwdriver with a 22 Phillips tip to install the five screws securing the circuit board to the chassis Apply the rear panel to the chassis and then install all the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual 5 23 AVG7 Analog Video Generator Troubleshooting AVG7 Analog Video Generator Troubleshooting This section contains instructions and procedures for troubleshooting the AVG7 Generator module These procedures will help you decid
120. atform Service Manual 10 19 HD3G7 HD 3 Gb s SDI Video Generator Maintenance 10 20 Connect the HD3G7 outputs to a waveform monitor Apply power to the TG700 mainframe Recall the Factory Default preset as follows a Press the MODULE button until TG700 appears b Press Enter button to select Preset c Press the up A or down V arrow button to select RECALL d Press the left lt 4 or right gt arrow button to select Factory Default e Press the ENTER button to reset the instrument to the factory default settings f Press the CANCEL button to return the TG700 main menu Verify that both HD3G7 outputs provide a 59 94 1080p format 75 color bar signal Check the DDS1 Phase lock status as described in the Module Diagnostics See page 10 16 Check module diagnostics Change the HD3G7 format to 60 Hz a Press the MODULE button to select the HD3G7 module b Press the FORMAT button to enter the HD3G7 format menu c Press the left 4 or right arrow button to select 1080 60 Check the DDS1 Phase lock status as described in the Module Diagnostics See page 10 16 Check module diagnostics If one of the formats 59 94 Hz or 60 Hz works correctly but the other one does not the mainframe sync pulse may be missing Perform the Swap Modules procedure below to determine the source of the problem Swap modules The interface between the mainframe and the module may make it difficult to determine whet
121. ation between the mainframe and the module circuit Deserializer This block contains a cable equalizer and deserializer circuit that converts the HDTV Serial Digital Input signal to a 20 bit parallel video signal with the recovered parallel clock The circuitry also detects the presence of input signal and identifies the format and rate of the incoming signal Signal Processing Signal Processing block up interpolates the Cb and Cr data and then color space converts the incoming video signal to RGB 4 4 4 YCbCr and RGB signals are available at the output of this block If XYZ 1s desired as the output the gamma correction is removed from the RGB data and the data is color space converted to linear XYZ data The linear XYZ data is then converted using the digital cinema gamma correction factor Converter Formatter This block allows selection of the output sample structure separating the video data into the dual link format reinsertion of EAV SAV data to the two output signals and adding incoming ancillary data and embedded audio to the Link A output video signal Address Generator This block consists of sample and line counters that can be frame delayed from a frame reference pulse using the MPU interface The counter outputs are used to control the signal generation Signal Generator Engine The Signal Generator Engine contains circuitry to generate the selected test signal and the EAV and SAV blanking data using the sample and line c
122. ay cause errors in performance The following table lists the equipment required to perform the adjustments needed for this module Table 10 1 Equipment required for HD3G7 HD 3 Gb s SDI Video Generator adjustment procedures Item No Minimum requirement Recommended equipment TV signal generator platform 1 Tektronix TG700 Digital signal analyzer 1 Digital signal analyzer with a 20 GHz Tektronix DSA8200 with an 80E04 electrical sampling module and a probe electrical sampling module and an interface module 80A03 Tek Connect Probe Interface module Stable 10 kHz sine wave 1 CW sine wave with 800 mV 5 Tektronix AFG3101 generator into 75 0 THD 60 dBc 10 kHz and 50 mV DC offset Tekconnect 75 010500 1 Tektronix TCA75 adapter with BNC input connector Precision RMS voltmeter 1 Keithley 2700 DMM 6 dB SMA attenuator 1 Tektronix part number 015 1001 01 SMA male to BNC female Tektronix part number 015 0554 00 adapter 1 m 3 ft BNC to BNC 1 Belden 1694 MarkerTek 1694 B B 3 high bandwidth cable 10 4 TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures Table 10 1 Equipment required for HD3G7 HD 3 Gb s SDI Video Generator adjustment procedures cont Item No Minimum requirement Recommended equipment 1 m 3 ft BNC to BNC 50 Q 1 Tektronix part number 012 0057 01 cable 75 Q precision terminator 1 75 0 0 1 Tektronix part numbe
123. cations or you can visit our Web site for service information www tektronix com Tektronix supports repair to the module level by providing module exchange Module exchange This service reduces downtime for repair by allowing you to exchange most modules for remanufactured ones Each module comes with a 90 day service warranty For more information Contact your local Tektronix service center or sales engineer for more information on any of the repair or adjustment services just described TG700 TV Signal Generator Platform Service Manual Maintenance for Generators and Modules The following information applies to all of the generators and modules that can be used with the TG700 mainframe Before doing maintenance procedures on any module read the following information Preparation Read and follow these preparation instructions before attempting to perform any maintenance or service to the instrument Servicing Prerequisites Ensure the following before beginning any instrument service The maintenance or service of this instrument must be performed by qualified service personnel only Read the Service Safety Summary located at the beginning of this manual before attempting to perform any maintenance or service to the instrument This section contains instructions and procedures for maintaining the AG7 Generator module The following information can be found in this section B Preparation See page xix Inspect
124. cedure WARNING 70 avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use the 75 Q BNC cable and 75 Q signal adapter to connect the SIGNAL 1 connector on the DVG7 Generator module to the CH1 input connector on the oscilloscope See Figure 8 3 NOTE Some sampling oscilloscopes do not automatically adjust their readouts to account for the 5 attenuation of the AMT75 You must remember to account for this attenuation while viewing the oscilloscope readouts if you are using an oscilloscope of this type 2 Use the 75 coaxial terminator to terminate the SIGNAL 2 connector on the DVG7 Generator module 8 4 TG700 TV Signal Generator Platform Service Manual TG700 mainframe rear panel DVG7 Digital Video Generator Adjustment Procedures Oscilloscope TDS784D 75 Q BNC cable LE 97 9 eL IS d le 75 coaxial terminator DVG7 module 75 O signal adapter Figure 8 3 Equipment connection for adjusting the output level 3 Set the oscilloscope settings as indicated below Vertical 160 mV div Horizontal 1 ns div Record Length 500 points in 10 div Trig Position CH4 Trig Source 50 Trig Slope Rising Edge Acquire Menu Sample DPO InstaVu Infinite Persistence Recall the Factory Default
125. cked check the input module NO INPUT DETECT test point along the top edge of the input board If the voltage on the test point is low an input is detected and the fault is probably on the main module board Figure 10 4 No Input Detect test point location Power up in factory mode Putting the instrument into factory mode allows access to calibration but it also allows the module to show in the menus even if it fails the POST routine 1 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously then release the MODULE and FORMAT buttons Continue to hold the FRONT PANEL ENABLE button until you see the Startup with Factory Mode message then release the button 2 Runthe Check module diagnostics routine See page 10 16 Check module diagnostics TG700 TV Signal Generator Platform Service Manual 10 21 HD3G7 HD 3 Gb s SDI Video Generator Replaceable Parts List HD3G7 HD 3 Gb s SDI Video Generator Replaceable Parts List This section contains a list of the replaceable modules for the HD3G7 Generator module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List This section contains a list of the replaceable parts and modules for the HD3G7 Generator modu
126. cts used by Tektronix for warranty work may be new or reconditioned to like new performance replaced parts modules and products become the property of Tektronix In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment 15 to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment c to repair any damage or malfunction caused by the use of non Tektronix supplies or d to service a product that has been modified or integrated with other products when the effect of such modification or integ
127. d capacitors on the AVG7 circuit board See Figure 5 5 C704B C804B C837A R835A C835A Qi Oo E R735A E LE oo lo C735A o C604B C637A R635A C635A Figure 5 5 Location of the variable resistors and capacitors for the group delay adjustment Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe Use the 75 Q BNC cable and the 75 Q signal adapter to connect the upper CH 1 connector on the AVG7 Generator module to the CH 1 input connector on the oscilloscope See Figure 5 6 Use the 75 O BNC cable and the 75 Q feed through termination to connect the BLACK 1 connector on the test signal generator to the CH 2 input connector on the oscilloscope See Figure 5 6
128. d install the SDI Output circuit board 878 0200 xx into J922 of the Main circuit board Slide the circuit board assembly onto the chassis guiding the BNC connectors through the holes in the rear panel Loosely install the six T10 TORX screws that attach the Main circuit board to the chassis CAUTION prevent damage to the circuit boards and to the FPGA do not tighten these screws at this time 4 5 10 12 If necessary position the outer rear panel over the BNC connectors Install the three P1 Posidriv flathead screws from the bottom through the chassis into the heat sink Torque these screws to 5 0 in Ib TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Maintenance 6 Replace the washers 9 16 inch nuts onto the BNC connectors Torque these nuts to 14 0 in Ib 7 Tighten the eight T10 screws that attach the Main circuit board to the chassis and to the heat sink in the sequence shown below See Figure 10 2 Note that the two screws that attach the Main board to the heat sink are tightened last 7 and 8 Torque all these screws to 8 0 in Ib Figure 10 2 HD3G7 main board installation The HD3G7 HD 3 Gb s SDI Video Generator module is now ready to install in the mainframe HD3G7 Troubleshooting This section contains instructions and procedures to troubleshoot the HD3G7 HD 3 Gb s SDI Video Generator module These procedures will help you decide whether it is
129. de Verify timecode is present on the input signal Use a WFM7120 or WFM8300 waveform monitor Verify GPS7 time source select is set to VITC See the TG700 User manual for directions Verify GPS7 time sync method is set as needed The Follow mode is best for troubleshooting purposes See the TG700 User manual for directions Check the GPS7 status menu for the Genlock input amplitude and VITC present indicators See the TG700 User manual for directions Run Loop Out Reference test See page 9 26 Loop output reference test Swap modules mainframes If no other problem found replace the GPS7 module TG700 TV Signal Generator Platform Service Manual 9 15 GPS7 Module Maintenance Procedures Power on self test When you first apply power to a TG700 it runs a Power On Self Test POST If an error is encountered during this POST the display will show one of several error codes See Table 9 5 Watch the display during boot up and note any error codes Table 9 5 POST error codes Error Code Meaning Action 1 CPLD constant 1 check OxAAAA or 0x00AA based on cpld version at addr 0x8 Try another GPS7 module in 2 CPLD constant 2 check 0x5555 or 0x0055 based on cpld version at addr the mainframe slot 1 If you 3 CPLD R W error writes 0x5555 to addr 0x102 and confirms do not have another module 4 CPLD R W error writes OxAAAA to addr 0x102 and confirms or if the 2n
130. ds before removing protective panels soldering or replacing components To avoid electric shock do not touch exposed connections TG700 TV Signal Generator Platform Service Manual Preface Manual Structure Manual Conventions This is the service manual for the TG700 TV Signal Generator Platform and associated modules This manual contains information needed to service a TG700 and its modules to the module level This manual is divided into sections Each section contains information about the mainframe or a module Further sections are divided into subsections Read the introductions to the procedures you find in each subsection They provide information you need to perform the service correctly and efficiently Each section in this manual contains the following subsections W Theory of Operation contains circuit descriptions that support service to the module level m Adjustment Procedures contains procedures for adjusting a TG700 to meet warranted characteristics m Removal Procedures contains procedures to safely remove replaceable modules from the mainframe and product modules Maintenance contains information and procedures for performing preventive and corrective maintenance for a TG700 These instructions include cleaning module removal and installation and fault isolation to the module level B Troubleshooting contains information and procedures to help you isolate and fix various problems m Diagrams conta
131. e See page 1 15 Top Cover Equipment Required The following table lists the equipment required to adjust the output offset output gain and luminance gain Table 7 1 Equipment required for BG7 Black Generator adjustment procedures Item No Minimum requirement Recommended equipment TV signal generator platform Tektronix TG700 Digital multimeter 5 1 2 digits FLUKE 8842A Video measurement set Tektronix VM700T Option 01 11 75 BNC cable Length 42 inches Tektronix part number 012 0074 00 75 Q coaxial terminator Tektronix part number 011 0102 03 Tektronix part number 103 0030 00 Tektronix part number 103 0090 00 BNC T connector So oS Oo Oo Ml BNC female to dual banana adapter 7 2 TG700 TV Signal Generator Platform Service Manual BG7 Black Generator Adjustment Procedures Output Offset and Gain Adjustment Preparation perform the output offset and gain adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors on the BG7 circuit board See Figure 7 2 R481 R581 R491 R591 IC JJ
132. e 5 attenuation of the AMT75 You must remember to account for this attenuation while viewing the oscilloscope readouts if you are using an oscilloscope of this type 2 Use the 75 coaxial terminator to terminate the SIGNAL 2 connector on the HDVG7 Generator module 12 4 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator Adjustment Procedures Sampling Oscilloscope TDS820 75 O BNC cable 0 ooo TG700 mainframe Deu S rear panel O m amp 75 coaxial terminator 75 signal adapter HDVG7 module SMA to BNC adapter Figure 12 3 Equipment connection for adjusting the output level 3 Setthe sampling oscilloscope settings as indicated below Vertical 30 mV div Horizontal 200 ps div Trig Position 50 Main Position 700 ps Trig Level OV Trig Slope Rising Edge Acquire Menu Normal DISPLAY Variable persistence 500 ms 4 Recall the Factory Default preset as follows Press the up or down V arrow button to select RECALL b Press the left lt 4 or right arrow button to select Factory Default c Press the ENTER button to recall the factory default settings d Press the CANCEL button to return the TG700 main menu 5 Select the 75 Color Bars signal as follows a Press the MODULE button to display the HDVG7 main menu b Press the COLOR BAR test signal button un
133. e 1 41 Removing a Module 2 Disconnect the cables at J830A upper 1 J830B lower CH 1 J730A upper CH 2 J730B lower CH 2 J630A upper CH 3 and J630B lower CH 3 on the AWVG7 circuit board 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector TG700 TV Signal Generator Platform Service Manual 6 15 AWVG7 Analog Wideband Video Generator Removal and Replacement Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the five screws securing the circuit board to the chassis Lift the circuit board up and away from the chassis and then place it on a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a screwdriver with a 22 Phillips tip to install the five screws securing the circuit board to the chassis Apply the rear panel to the chassis and then install all the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Troubleshooting AWVG7 Analog Wideband Video Generator Troubleshooting Equipment Required This section contai
134. e 5 3 Equipment required for AVG7 Analog Video generator troubleshooting 5 24 Table 5 4 AVG7 Analog Video Generator replaceable parts 5 28 Table 6 1 Equipment required for AWVG7 Analog Wideband Video Generator adjustment juez 6 4 Table 6 2 Required tools for removal and replacement of AWVG7 Analog Wideband Video HT LIT EEUU 6 15 Table 6 3 Equipment required for AWVG7 Analog Wideband Video Generator troubleshooting 6 17 Table 6 4 AWVG7 Analog Wideband Video Generator replaceable 6 21 Table 7 1 Equipment required for BG7 Black Generator adjustment procedures 7 2 Table 7 2 Required tools for removal and replacement of BG7 Black Generator 7 9 Table 7 3 Equipment required for BG7 Black Generator 7 11 Table 7 4 BG7 Black Generator replaceable 0 7 15 Table 8 1 Equipment required for DVG7 Digital Video Generator adjustment procedures 8 3 Table 8 2 Required tools for removal and replacement of DVG7 Digital Video Generator 8 8 X TG700 TV Signal Generator Platform Service Manual Table of Contents Table 8 3 Equipment required for DVG7 Digital Video Generator troubleshooting
135. e equipment as follows a Connect the m high bandwidth cable from the AFG3101 output to the TCA75 in the left port of the 80A03 b Connect 50 cable from the AFG3101 trigger output and connect the other end to the BNC to SMA adapter c Connect the BNC to SMA adapter to the 6 dB SMA attenuator and connect the attenuator to the trigger input on the oscilloscope 3 Keep the AFG3101 settings the same as in step 2 of the Characterize the Reference to the DMM procedure above 4 Set the oscilloscope Time Div 20 us Volts Div 50 mV Averaging 16 Record Length 4000 points 5 Onthe oscilloscope select measurement 1 then select pulse amplitude and then select it to measure Cycle RMS Record the value in the SDI Output Amplitude table See Table 10 2 6 On the oscilloscope select measurement 2 then select pulse amplitude and then select it to measure Cycle Mean Record the value in the SDI Output Amplitude table See Table 10 2 7 Calculate the corrected RMS sine wave amplitude V cycle RM S cycle mean TG700 TV Signal Generator Platform Service Manual 10 7 HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures 10 8 Adjust SDI Output Amplitude Record the result in the SDI Output Amplitude table See Table 10 2 DM M measurement Corrected RM S sine wave amplitude Record this total system attenuation factor in the SDI Output Amplitude table See Table 10 2 Calculate
136. e screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the HDVG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Usethe Removing a Module section to remove the HDVG7 Generator module from the mainframe See page 1 41 Removing a Module 2 Disconnect the cables at P500 SIGNAL 1 and P502 SIGNAL 2 on the HDVG7 circuit board If Option BK is installed also disconnect the cables at J800 BLACK 1 and J802 BLACK 2 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector 12 8 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator Removal Replacement Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the six screws securing the circuit board to the chassis Lift the circuit board up and away from chassis and then place it on
137. e taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period 6 14 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Removal and Replacement AWVG7 Analog Wideband Video Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the AWVG7 Generator module Tools Required The following tools are required to perform the removal and replacement procedures Table 6 2 Required tools for removal and replacement of AWVG7 Analog Wideband Video Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the AWVG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Usethe Removing a Module section to remove the AWVG7 Generator module from the mainframe See pag
138. e whether it is necessary to replace your module Equipment Required The equipment listed in the following table is required for troubleshooting Table 5 3 Equipment required for AVG7 Analog Video generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the troubleshooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears Press the ENTER button to access the PRESET submenu Press the up A or down V arrow button to select SAVE Press the left lt 4 or right gt arrow button to select a preset number to save instrument settings Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created 5 24 TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Troubleshooting Troubleshooting Trees Power on the TG700 as follows 1 Connect the power cable to the instrument 2 Wait until the mainframe and the module completely initialize Check that no error messages appear on the display 3 Press the front panel MODULE button Is the AVG7 main
139. eatsink to expose the adhesive 9 Step 1 Peel off protective plastic to expose the adhesive on one side 4 0230 008 Figure 10 5 HD3G7 HD 3 Gb s SDI Video Generator replaceable parts TG700 TV Signal Generator Platform Service Manual 10 23 HD3G7 HD 3 Gb s SDI Video Generator Replaceable Parts List Table 10 9 HD3G7 main board replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 10 6 1 159 5022 00 3 FUSE 5 0A 125V FAST BLOW 0 1 X 0 1 X 0 24 UL REG CSA 451005 5 CONTROLLED 2 159 0463 00 2 FUSE SMD 2A 32V FAST ACTING 0 024 OHM 0603 SIZE UL CSA REG SAFETY CONTROLLED TAPE amp REEL 5000PCS PB FREE 3 131 8270 00 3 CONN EDGECARD PCB STRAIGHT FEMALE SOCKET 2X20 40 POS HIGH SPEED 0 8MM PITCH 0 062 BOARD SMT SAMTEC MEC8 120 02 L D DV A K 0230 008 Figure 10 6 HD3G7 main board replaceable parts 10 24 TG700 Signal Generator Platform Service Manual HDLG7 HD Dual Link Video Generator HDLG7 HD Dual Link Video Generator Theory of Operation This section describes the basic operation of the major circuit blocks in the HDLG7 module Bus Interface This block provides the communic
140. edures for performing adjustments Further the manual contains information for corrective maintenance down to the module level To isolate a failure use the fault isolation procedures found in the troubleshooting sections for the mainframe and product modules To remove and replace any failed module follow the instructions in the removal procedure sections for the mainframe and product modules After isolating a faulty module replace it with a fully tested module obtained from the factory Use the replaceable parts list sections for the mainframe and product modules for part numbers and ordering information for all replaceable modules TG700 TV Signal Generator Platform Service Manual xvil Introduction Tektronix Service Offerings Warranty Repair Service Self Service Tektronix provides service to cover repair under warranty and other services that may provide a cost effective answer to your service needs Whether providing warranty repair service or any of the other services listed below Tektronix service technicians are well trained to service the TG700 They have access to the latest information on improvements to the TG700 and the latest new options Tektronix warrants this product for one year from date of purchase The warranty appears after the title page in this manual Tektronix technicians provide warranty service at most Tektronix service locations The Tektronix product catalog lists all worldwide service lo
141. ee Figure 1 7 a Useascrewdriver with a 2 Phillips tip to remove the two screws securing the front cover to the left and right sides of the front frame b Grasp the front cover and pull it forward 1 18 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Removal and Installation Procedures 3 Remove the A20 Front Key board See Figure 1 7 a Useascrewdriver with a 2 Phillips tip to remove the four screws securing the A20 board to the front cover b Lift the board away 4 Remove the LCD module See Figure 1 7 a Useascrewdriver with a 2 Phillips tip to remove the four screws securing the LCD module to the front frame b Lift the board away 5 Now hand disassemble the front panel assembly components See Figure 1 7 Reverse the procedure to reassemble 6 Reinstallation Perform steps 2 through 5 in reverse order to reinstall the front panel assembly Front frame LCD module Front cover A20 Front Key board Figure 1 7 Disassembly of front panel assembly TG700 TV Signal Generator Platform Service Manual 1 19 TG700 Mainframe Removal and Installation Procedures Procedure for Internal Modules 1 20 A10 Main Board Perform the Access Procedure before doing any procedure in this group See page 1 15 The procedures are 10 Main Board Power Supply Module Assemble equipment and locate modules to be removed a You need a screwdriver with a 2 Phillips tip it
142. emove the top cover of the TG700 mainframe See page 1 15 Top Cover Equipment Required The following table lists the equipment required to adjust the output offset output gain and clock timing Table 3 1 Equipment required for AGL7 adjustment procedures Item No Minimum requirement Recommended equipment TV signal generator platform 1 Tektronix TG700 Digital multimeter 1 5 1 2 digits FLUKE 8842A Oscilloscope 1 Bandwidth 500 MHz or higher Tektronix TDS754D with two P6139A probes 75 Q BNC cable 75 coaxial terminator Length 42 inches Tektronix part number 012 0074 00 Tektronix part number 011 0102 03 Tektronix part number 103 0030 00 Tektronix part number 103 0090 00 BNC T connector female to dual banana adapter TG700 TV Signal Generator Platform Service Manual 3 3 AGL7 Analog Genlock Adjustment Procedures Output Offset and Gain Adjustment Preparation perform the output offset and gain adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors on the AGL7 circuit board See the following figure
143. ems 1 and 3 b Locate the module to be removed in the locator diagram nternal modules See Figure 1 4 Orient the instrument Set the TG700 so its bottom is down on the work surface and its right side is facing you Remove the A10 Main board See Figure 1 8 a Unplug these cables The cables from the LCD module at J720 J725 cable from the A20 Front Key board at J710 b Use a screwdriver with a 2 Phillips tip to remove the eight screws securing the 10 Main board to the chassis c Lift the board up and away from the chassis to complete the removal Reinstallation Do step 2 in reverse order to reinstall the 10 Main board TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Removal and Installation Procedures gt Figure 1 8 A10 Main board removal Power Supply Module 440 LAN board m Fan m RFI filter 1 Assemble equipment and locate modules to be removed a You need screwdrivers with 1 and 2 Phillips tips items 1 2 and 3 and a 7 mm nut driver item 4 b Locate the module to be removed in the locator diagram Internal modules See Figure 1 4 2 Orient the instrument Set the TG700 so its bottom is down on the work surface and its back is facing you 3 Remove the power supply module a Use a screwdriver with a 1 Phillips tip to loosen the two screws securing the power supply module to the mainframe b Pull the
144. en release the MODULE and FORMAT buttons to restart the instrument in Factory mode Continue holding down the FRONT PANEL ENABLE button until the TG700 Startup with Factory Mode message appears TG700 TV Signal Generator Platform Service Manual 6 5 AWVG7 Analog Wideband Video Generator Adjustment Procedures 6 6 10 11 12 13 14 15 16 17 18 19 20 Select the DAC Gain GBR 0 mV calibration signal as follows a Pressthe MODULE button to display the AWVG7 main menu b Press the up A or down V arrow button to select CALIBRATION c Press the left lt 4 or right amp arrow button to select DAC Gain GBR and then press the ENTER button d Press the left lt 4 or right gt arrow button to select OmV and then press the ENTER button Locate variable resistor R856A on the AWVG7 circuit board See Figure 6 2 Adjust R856A so that the output offset is 0 V 1 mV Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AWVG7 Generator module Locate variable resistor R756A on the AWVG7 circuit board See Figure 6 2 Adjust R756A so that the output offset is 0 V 1 mV Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AWVG7 Generator module Locate variable resistor R656A on the AWVG7 circuit board See Figure 6 2 Adjust R656A so that the output offset is 0 V 1 mV Move the BNC cable from the
145. ent Procedures 6 Select the CH1 2 3 Composites video configuration as follows a Press the up A or down arrow button to select CONFIGURATION and then press the ENTER button to access the CONFIGURATION submenu b Press the left lt 4 or right gt arrow button to select CH1 2 3 Composites and then press the ENTER button 7 Locate variable capacitors C837A C737A C637A C804B C704B C604B C835A 735 and C635A and variable resistors R835A R735A R635A See Figure 5 6 8 Rotate C837A C737A and C637A 180 from its initial position and set R835A R735A and R635A to its center position 9 Adjust C804B and C835A so that the baseline of the modulated 20T pulse signal is flat See Figure 5 7 Run 500MS s Average MJE F 00us Ch f 460mV 19 Mar 2002 WM ov M1 D 500ns Runs After 19 57 28 Figure 5 7 Adjusting the baseline of the modulated 20T pulse signal 10 Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AVG7 Generator module 11 Adjust C704B and C735A so that the baseline of the modulated 20T pulse signal is flat 12 Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AVG7 Generator module 13 Adjust C604B and C635A so that the baseline of the modulated 20T pulse signal is flat TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustm
146. ent Procedures Frequency Response Adjustment Preparation perform the frequency response adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors and capacitors on the AVG7 circuit board See Figure 5 8 R835A 93 ODE E R735A lo AO SUE pe coger E R635A C635A Figure 5 8 Location of the variable resistors and capacitors for the frequency response adjustment Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Use the two 75 BNC cable peak detector head and BNC female to female connector to connect the upper CH 1 connector on the AVG7 Generator module to the
147. ent connection for adjusting the output offset and gain 2 Press and hold the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously until TG700 Preset is displayed then release the MODULE and FORMAT buttons to restart the instrument in Factory mode 3 Select the DAC Offset 0V DC calibration signal for BLACK 1 through BLACK 3 as follows a b c je Press the MODULE button to display the AGL7 main menu Press the up or down V arrow button to select SELECT OUTPUT Press the left lt 4 or right gt arrow button to select BLACK 1 and then press the ENTER button Press the left lt 4 or right gt arrow button to select CAL and then press the ENTER button Press the left lt 4 or right gt arrow button to select DAC Offset 0V DC and then press the ENTER button Press the CANCEL button twice Repeat parts c through f of this step to select the calibration signal for BLACK 2 Press the left lt 4 or right gt arrow button to select BLACK 3 and then press the ENTER button Press the left lt 4 or right amp arrow button to select Black Burst Same as BLACK2 and then press the ENTER button Press the CANCEL button to return the AGL7 main menu 4 Locate variable resistor R691 on the AGL7 circuit board See Figure 3 2 5 Adjust R691 so that the output offset is 0 V 1 mV 6 Move the BNC cable connection from the BLACK 1 connector to the BLACK 2 connector on the AG
148. enu Output selection Signal format Test signal CH 1 2 mV div CH 2 1 00 V div 20 MHz CH 1 2 ms div 1096 CH 2 Edge Peak Detect Set the test signal generator ATG7 module settings as indicated below BLACK 1 NTSC Field Reference TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustment Procedures 6 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously and then release the MODULE and FORMAT buttons to re start the instrument in Factory mode 7 Select the 525 GBR signal format as follows a Press the MODULE button to display the AVG7 main menu b Press the FORMAT button to select 525 GBR and then press the ENTER button c Press the COLOR BAR button 8 Select the DAC Test calibration signal as follows a Press the up A or down V arrow button to select CALIBRATION b Press the left lt 4 or right amp arrow button to select DAC Test and then press the ENTER button c Press the ENTER button again to confirm the signal output 9 Select the Sync ON Channels mode as follows a Press the up A or down arrow button to select VIDEO and then press the ENTER button to access the VIDEO submenu b Press the up or down V arrow button to select GBR SYNC c Press the left 4 or right P arrow button to select Sync ON Channels and then press the ENTER button 10 Locate variable capacitors C835A C735A and 635
149. erator 2 2 emen eene 2 5 Equipment Reg ired SF Tete areae ues Fed Pus ee 2 5 Backing Up the Instrument 2 2 5 Troubleshooting Trees e I tance cites EE To Y rea S PNE TREE cages land 2 6 AG7 Audio Generator 2 ne EEE Ea 2 8 Audio Generator Replaceable Parts 184 2 00020 2 9 AGL7 Analog Genlock Module AGL7 Analog Genlock Module Theory 2 02 3 1 Analog GEnlOCK cU 3 1 Black Burst Generator vidoes danced ce SE ER suena de E E EEEN 3 1 AGL7 Analog Genlock Adjustment 2 0 3 3 Requirements for Adjustment 0 cece cece eee ee nen ehe ehe eme see 3 3 Equipment Required d ou Ed 3 3 Output Offset Gain 3 4 Clock Timing Adjustment Board Number 671 B089 XX and 671 279 00 3 7 AGL7 Analog Genlock Module 2 2 meme eme 3 11 AGL7 Analog Genlock Module Removal and 3 12 Tools Reg tred ee eb e 3 12 Replacin
150. erator module 2 5 2 TG700 TV Signal Generator Platform Service Manual vii Table of Contents viii Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 5 11 Figure 5 12 Figure 5 13 Figure 5 14 Figure 5 15 Figure 5 16 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 7 1 Figure 7 2 Figure 7 3 Figure 7 4 Figure 7 5 Figure 7 6 Figure 7 7 Figure 7 8 Figure 8 1 Figure 8 2 Figure 8 3 Figure 8 4 Figure 8 5 Figure 8 6 Figure 8 7 Location of the variable resistors for the output offset and gain adjustment 5 5 Equipment connection for adjusting the output offset and gain 5 5 Location of the test points for the frame timing and clock timing adjustment 5 8 Location of the variable resistors and capacitors for the group delay adjustment 5 10 Equipment connection for adjusting the group 4 2 5 11 Adjusting the baseline of the modulated 20T pulse 5 12 Location of the variable resistors and capacitors for the frequency response adjustment 5 13 Equipment connection for adjusting the frequency 5 14 Adjusting the
151. erator module Tools Required The following tools are required to perform the removal and replacement procedures Table 8 2 Required tools for removal and replacement of DVG7 Digital Video Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the DVG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Usethe Removing a Module section to remove the DVG7 Generator module from the mainframe See page 1 41 Removing a Module 2 Disconnect the cables at P500 SIGNAL 1 and P502 SIGNAL 2 on the DVG7 circuit board If Option BK is installed also disconnect the cables at J800 BLACK 1 and J802 BLACK 2 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector 8 8 TG700 TV Signal Generator Platform Service Manual DVG7 Digital Video Generator Removal Replacement Replaci
152. ertified for the country of use Ground the product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe all terminal ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Power disconnect The power cord disconnects the product from the power source Do not block the power cord it must remain accessible to the user at all times Do not operate without covers Do not operate this product with covers or panels removed Do not operate with suspected failures If you suspect that there is damage to this product have it inspected by qualified service personnel Avoid exposed circuitry Do not touch exposed connections and components when power is present Do not operate in wet damp conditions Do not operate in an explosive atmosphere Keep product surfaces clean and dry Provide proper ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation xii TG700 TV Signal Generator Platform Service Manual General Safety Summary Terms in This Manual These terms may appear in this manual WARNING Warni
153. ety Summary Finding Other Information xvi The following documents relate to the TG700 mainframe and product modules These documents be located on the 7G700 Signal Generator Platform SW Library and Documentation DVD shipped with the instruments or on the Tektronix Web site at www tektronix com manuals The 7G700 TV Signal Generator Platform User Manual contains a tutorial to quickly describe how to operate the TG700 It also includes an in depth discussion on how to more completely use the TG700 features This manual is available in both English Tektronix part number 071 1970 XX and Japanese Tektronix part number 071 1971 XX The 7G700 TV Signal Generator Platform PC Tools Technical Reference Tektronix part number 077 0138 X X describes how to use the PC tools that are available for the mainframe and related modules The TG700TV Signal Generator Platform Specifications and Performance Verification Technical Reference Tektronix part number 077 0137 XX describes the mechanical electrical and environmental specifications for the mainframe and related modules This manual also provides performance verification procedures The 7G700 TV Signal Generator Platform Release Notes Tektronix part number 077 0229 X X describes the new features improvements and limitations of the most recent available firmware for the TG700 TV Signal Generator Platform This information is provided in both Japanese and English TG700 TV Sign
154. f the HD3G7 Generator module Power Supplies HD3G7 HD 3 Gb s SDI Video Generator Theory of Operation Ref clock Convertor jitter attenuator Digital sine wave data Flexible generator clock Input board Input Trig out Trigger output mux Output board Signal 1 2 Signal 2 0230 005 There are three switching supplies and several linear supplies in the module Most of the power for the module comes in as 5 V and is converted to the voltage needed by the switching supplies The mainframe supplies a small amount of 3 3 V for the processor interface but the bulk of the 3 3 V used on the board is produced by the switching supply There are also 1 8 V and 1 2 V supplies which are used for the memory and FPGA cores TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures The HD3G7 HD 3 Gb s SDI Video Generator has one adjustments associated with it Requirements for Adjustment Personnel Warm Up Period Equipment Required Before doing the adjustment note the following requirements This procedure is only to be performed by trained service technicians The HD3G7 Generator module requires a 20 minute warm up time in a 18 C to 28 C environment before it is adjusted Adjustments done before the operating temperature has stabilized m
155. functioning correctly Is the module operating correctly The problem is probably in the S STIR TG700 mainframe Refer to Trouble operating correctly shooting in 76700 TV Signal Generator Platform Service Manual HDVG7 module OK Replace the module Figure 12 5 Troubleshooting procedure 2 12 12 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator Diagram HDVG7 HDTV Digital Video Generator Diagram The following figure shows the HDVG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the 7G700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the HDVG7 Generator module is located in the HDVG7 Theory of Operation section See page 12 1 HDVG7 Generator module TG700 mainframe e SIGNAL 1 Ee T 10 Main board 77 oOo P502 SIGNAL 2 Slot 2 4 Rear panel PN connectors BLACK 1 P010 P802 BLACK 2 ll 0 01 3 9 O Option BK only A10 Main board Figure 12 6 HDVG7 Generator module connections TG700 TV Signal Generator Platform Service Manual 12 13 HDVG7 HDTV Digital Video Generator Replaceable Parts List HDVG7 HDTV Digital Video Generator Replaceable Parts List This section contains a lis
156. g the Rear Panel Connectors and Chassis 2 3 12 AGL7 Analog Genlock Module Troubleshooting 2 25 3 14 Equipment Required 55e ooo reete ee Tg ER e ges 3 14 Backing Up the Instrument 2 2 2 2 00 2 008 4 3 14 Troubleshooting Trees iioc irre EUR ERR ERE PUU RATES bete 3 15 ii TG700 TV Signal Generator Platform Service Manual Table of Contents AGL7 Analog Genlock Module Diagram 3 17 AGL7 Analog Generator Module Replaceable Parts 184 3 18 ATG7 Analog Test Generator ATG7 Analog Test Generator Theory of Operation 2 22002 4 1 ATG7 Analog Test Generator Maintenance 2 2 2 4 2 ATG7 Analog Test Generator Removal and 4 3 gSIERHG pci 4 3 Replacing the Rear Panel Connectors and Chassis 2 2 222 2 4 3 ATG7 Analog Test Generator Troubleshooting 222 2 2 2 2 4 5 Equipment Reguired 5 ee o renes es 4 5 Backing Up the Instrument 222 0 2 4 5 Troubleshooting TTees oer
157. h the module or with the input clock from the mainframe or with the input signal Flex 0 is not used currently and may indicate lock or unlock m DDS Status DDSI Phase Lock should be displayed when in generator mode Lock or Unlk may be displayed when in converter mode DDSO is not used currently and may indicate lock or unlock TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Maintenance m CRC Errors Displays a count of errors detected on the converter input Errors will occur at power up and should be cleared after an input is connected in converter mode m Clear CRC Errors Press enter to clear the input CRC error counters B Temperatures The HD3G7 module detects the temperature on the board This temperature is normally about 15 C above ambient temperature If the temperature is very high or low check that the fan is operating the installation clearances are correct and that all cables are connected properly If there is still a problem replace the HD3G7 module E FPGA Version Current shows the FPGA version that is loaded Expected shows the version that the operating firmware expects If these are different consider upgrading the software VOLTAGE MON 1 2 3 amp 4 All internal voltages except the mainframe 5 V supply are measured and displayed with OK if they are within the established limits If any voltages are out of the established limits the HD3G7 module
158. he AWVG7 circuit board See Figure 6 5 Turn the LEVEL knob the peak detector amplifier so that the green LED lights Adjust C804B so that the amplitude changes from 500 kHz to 20 MHz are at a minimum See Figure 6 7 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Adjustment Procedures Run 10 0kS s Average SOOKH2 7 0mv 1 4mV 20271227 Ws 00ms Cht J 24 0mW 5 00mV 5 Figure 6 7 Minimizing the amplitude changes 11 2002 14 01 18 9 Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AWVG7 Generator module 10 Adjust C704B so that the amplitude changes from 500 kHz to 20 MHz are at a minimum 11 Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AWVG7 Generator module 12 Adjust C604B so that the amplitude changes from 500 kHz to 20 MHz are at a minimum TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Maintenance AWVG7 Analog Wideband Video Generator Maintenance This section contains instructions and procedures for maintaining the AWVG7 Generator module The following information can be found in this section E Removal and Replacement See page 6 15 BW Troubleshooting See page 6 17 If the instrument does not function properly troubleshooting and corrective measures should b
159. he BG7 main menu b Press the left 4 or right gt arrow button to select BLACK 3 and then press the ENTER button c Press the left lt 4 or right arrow button to select PAL and then press the ENTER button d Press the left lt or right gt arrow button to select 75 Colour Bars and then press the ENTER button e Press the CANCEL button twice to return the module main menu f Repeat parts b through d of this step to select the 75 Colour Bars signal for BLACK 4 Press the Measure button on the video measurement set to open the Measure mode display Touch the Video Standard soft key to change the acceptable video standard for PAL In the Measure mode display touch the Color Bar soft key to open the Color Bar measurement display Press the Menu button to display the Color Bar main menu Touch the Average soft key and rotate the front panel knob to set the value to 16 Locate variable resistor R681 on the BG7 circuit board See Figure 7 2 Adjust R681 so that the luminance gain White is 700 mV 1 5 mV Verify that chrominance gain Red is within the range of 658 8 mV to 668 8 mV Change the BNC cable connection from the BLACK 3 connector to the BLACK 4 connector on the BG7 Generator module Locate variable resistor R781 on the BG7 circuit board See Figure 7 2 Adjust R781 so that the luminance gain White is 700 mV 1 5 mV Verify that chrominance gain Red is within the ra
160. he factory Semiconductors Loosely inserted in sockets Distorted pins Firmly seat loose semiconductors Remove devices that have distorted pins Carefully straighten pins as required to fit the socket using long nose pliers and reinsert firmly Ensure that straightening action does not crack pins causing them to break off Wiring and cables Loose plugs or connectors Burned broken or frayed wiring Firmly seat connectors Repair or replace modules with defective wires or cables Chassis Dents deformations and damaged hardware Straighten repair or replace defective hardware Cleaning Procedure Interior To clean the TG700 interior perform the following steps 1 Blow off dust with dry low pressure deionized air approximately 9 psi 2 Remove any remaining dust with a lint free cloth dampened in ethyl alcohol and rinse with warm deionized water A cotton tipped applicator is useful for cleaning in narrow spaces and on circuit boards NOTE If after performing steps 1 and 2 a module is clean upon inspection skip the remaining steps 1 8 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Maintenance 3 Ifsteps 1 and 2 do not remove all the dust or dirt the TG700 may be spray washed using a solution of ethyl alcohol by performing steps 4 through 8 4 Gain access to the parts to be cleaned by removing easily accessible shields and panels see Removal
161. he master clock frequency Initial Setup Signal Generator Frequency 10 000000 MHz Output Level 8 dBm Procedure 1 Use the 75 Q BNC cable and the 50 Q to 75 minimum loss attenuator to connect the CW connector on the AGL7 Genlock module to the output connector on the signal generator as shown in the following figure 75 BNC cable Signal Generator TG700 mainframe rear panel AGL7 module 50 Q to 75 minimum loss attenuator Figure 1 1 Equipment connection for adjusting master clock frequency 2 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously and then release the MODULE and FORMAT buttons to restart the instrument in Factory mode 3 Setthe genlock source to CW of the AGL7 Genlock module as follows a Pressthe MODULE button to display the AGL7 main menu b Press the up or down V arrow button to select GENLOCK and then press the ENTER button to access the GENLOCK submenu c Press the left lt 4 or right f arrow button to select CW and then press the ENTER button d Press the CANCEL button to return to the AGL7 main menu 4 Press the MODULE button until the TG700 main menu is displayed 5 Press the up A or down V arrow button to select UTILITY and then press the ENTER button to access the UTILITY submenu 6 Press the up A or dow
162. her the problem lies in the mainframe or in the module Trying the HD3G7 module in another slot or in a known good mainframe is a simple way to quickly isolate which is at fault 1 Try the HD3G7 module in known good mainframe in another slot where a DVG7 BG7 or AVG7 module is known to work correctly These modules use the same clocks and frame pulses If the HD3G7 module works correctly here replace or repair the original mainframe Try another HD3G7 module or a DVG7 BG7 or AVG7 module all of which use the same clocks and frame pulses in the same mainframe and slot If another module works correctly in the original slot then replace the HD3G7 module TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Maintenance Converter mode test Follow this procedure if there is a problem when the HD3G7 module is set for converter mode 1 Confirm that the input signal is present and that the format is compatible with the selected output Specifically the input must be interlace video at the same frame rate as the progressive output same frame rate 50 59 94 or 60 Hz 2 Remove and reconnect the input signal a few times to see if that clears the problem 3 Verify the input is good a Apply the input signal directly to the WFM7120 b Check for general status problems correct format EDH errors and excessive Jitter 4 Ifthe HD3G7 status screen continues to report Input Signal Unlo
163. hese procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 11 4 m Troubleshooting See page 11 6 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period TG700 TV Signal Generator Platform Service Manual 11 3 HDLG7 HD Dual Link Video Generator Removal and Replacement HDLG7 HD Dual Link Video Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the HDLG7 module Tools Required The following tools are required to perform the removal and replacement procedures Table 11 1 Required tools for removal and replacement of HDLG7 HD Dual Link Video Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the HDLG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connector
164. ht RF BNC RF L IN Center RF BNC CW IN CW BNC on the AGL7 circuit board 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector NOTE When you are reinstalling the BNC cables dress the cables so that the top three cables cross over the bottom three cables at right angles In addition position the cables to minimize bending at the exit points of the black heat shrink That is make bends in the brown portion of the coax cable between the heat shrink tubing ends not within the heat shrink See Figure 3 5 TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Module Removal and Replacement Figure 3 5 Dressing the AGL7 BNC cables Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the six screws securing the AGL7 circuit board to the chassis Lift the circuit board up and away from chassis and then place it on a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a screwdriver with a 2 Phillips tip to install the five screws securing the circuit board to the chassis Apply the rear panel
165. ial no Serial no number part number effective discont d Qty Name amp description 3 9 116 1125 00 1 EXCHANGE MODULE AGL7 3 9 1 441 A269 02 1 CHASSIS MODULE AGL7 ASSY 2 333 405 00 1 PANEL REAR AGL7 AL 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL N1 PL CROSS amp SLOTTED 5 348 A128 00 2 5 SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 CM 6 174 B851 00 1 ASSY RF 75 OHM COAX RG179 5 5 CM L BNC TO MCX 7 211 A245 01 5 SCREW MACHINE M3X6MM L PNH STL NI PL CROSS REC W KOGATAMARU amp LOCK WASHER 8 334 1378 03 1 MARKER IDENT MKD SERIAL NO 9 342 A146 00 1 INSULATOR PLATE HEAT CONDUCTOR RUBBER 20MMX20MMX100MM THK TC1000 TKC 10 174 B847 00 5 CABLE ASSY RF 750HM COAX RG179 7 5CM L BNC TO MCX STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTATION DVD OPTIONAL ACCESSORIES 003 A041 00 1 NUTDRIVER BOX 14MM HEX BNC RETAINING NUT MODIFIED 19MM 3 18 TG700 TV Signal Generator Platform Service Manual AGL7 Analog Generator Module Replaceable Parts List 0230 010 Figure 3 9 AGL7 Genlock module exploded view TG700 TV Signal Generator Platform Service Manual 3 19 AGL7 Analog Generator Module Replaceable Parts List 3 20 TG700 TV Signal Generator Platform Service Manual ATG7 Analog Test Generator ATG7 Analog Test Ge
166. in For this to work deterministically the phase of the two clocks is automatically controlled The status of this automatic control system is shown in the module diagnostic menu as DDS1 phase In converter mode the fixed 148 5 MHz Ref clock is used as a training clock in the input de serializer The FPGA then outputs a clock that was recovered from the input This clock is passed through the jitter attenuator to remove possible jitter from the HD input and then like the generator mode clock it drives the serializer clocks and the trigger output multiplexer Input and Output Boards 10 2 The input board contains a cable equalizer to accommodate various cable lengths The equalizer output is sent to the FPGA The input board also contains the trigger output The user can select the active pixel clock or if in generator mode a pulse at either line or field rate The output is 50 Q to drive typical oscilloscope inputs The output board takes two channels from the FPGA serializers and buffers them to drive 75 Q cable The output level is set by non volatile electronic potentiometers on the output board so the calibration is captured in the board TG700 TV Signal Generator Platform Service Manual Connector to lainframe flash Frame pulse 3 Configuration Configuration data and control 54 MHz Clock 33v Switching 18 power supplies 15 Figure 10 1 Simplified block diagram o
167. ine cord in the location diagram External Modules See Figure 1 3 Orient the instrument Set the TG700 so its bottom is down on the work surface and its rear is facing you Remove the line cord Find the line cord on the rear panel Grasp the plug and pull the line cord and clamp away to complete the removal Reverse procedure to reinstall Assemble equipment and locate modules to be removed a You need screwdriver with a 2 Phillips tip items 1 and 3 b Locate the modules to be removed in the locator diagram External modules See Figure 1 3 Orient the instrument Set the TG700 so its bottom is down on the work surface and its rear is facing you TG700 TV Signal Generator Platform Service Manual 1 15 TG700 Mainframe Removal and Installation Procedures 3 Remove the top cover a Useascrewdriver with a 2 Phillips tip to remove the two screws securing the front of the top cover to the TG700 b Slide the top cover toward the rear and then lift it off the TG700 See Figure 1 5 4 Reinstall top cover a Perform step 3 in reverse order to reinstall the top cover b Plug the line cord into its receptacle on the rear panel This completes the TG700 reassembly Figure 1 5 Top cover removal 1 16 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Removal and Installation Procedures Front Panel Unit 1 Assemble equipment and locate modules to be removed a b You need a scre
168. ing It should be between 5 V and 6 V Connect 75 precision terminator to BNC T connector to simulate a typical load The Antenna Power light should change from blinking green to solid green Check the voltmeter reading It should be between 4 V and 5 V If the GPS7 module does not provide the correct voltages replace the GPS7 module Disconnect the cable from the GPS7 Antenna connector Reset the GPS7 module to the voltage noted in step 3 or to the correct voltage for the antenna in use Reconnect the antenna Swap modules and mainframes If you have other TG700 modules or mainframes available they can be used to help isolate problems Swap the GPS7 module into slot 1 of another TG700 mainframe If the GPS7 module works in that mainframe the problem is in the original mainframe Swap a second GPS7 module into slot 1 of the test mainframe If this module works in the test mainframe the problem is the original GPS7 module Put a module of a different type into slot 1 of the test mainframe An AGL7 module is a good one to use as it uses most of the same signals as a GPS7 module If that module works in the test mainframe then suspect the original GPS7 module but the problem could still be in the mainframe TG700 TV Signal Generator Platform Service Manual 9 23 GPS7 Module Maintenance Internal mode oven test Perform this procedure to determine if the oven oscillator is working and within specifications 1
169. ins a block diagram and an interconnect diagram Replaceable Parts List includes a table of all replaceable modules their descriptions and their Tektronix part numbers This manual uses certain conventions with which you should become familiar Some sections of the manual contain procedures for you to perform To keep those instructions clear and consistent this manual uses the following conventions B Names of front panel controls and menus appear in the same case initial capitals all uppercase etc in the manual as is used on the TG700 front panel and menus Instruction steps are numbered unless there is only one step TG700 TV Signal Generator Platform Service Manual xv Preface Modules Safety Bold text refers to specific interface elements that you are instructed to select click or clear 7 Example Press the ENTER button to access the PRESET submenu Italic text refers to document names or sections Italics are also used in NOTES CAUTIONS and WARNINGS Example The Diagrams section includes a block diagram and an interconnect diagram Throughout this manual the term module appears A module is composed of electrical and mechanical assemblies circuit cards and interconnecting cables References to a module are different than references to a product module such as AGL7 Genlock module which is a product installed in the TG700 mainframe Symbols and terms related to safety appear in the General Saf
170. ion This section describes the basic operation of the major circuit blocks in the AGL7 Genlock module Analog Genlock The Analog Genlock consists of the following blocks Bus Interface This block provides the communication between the mainframe and the module circuit Amp amp Restorer This block consists of amplifiers to adjust the amplitude of the signal from REF or CW input and restorer to recover the DC component of the signal Sync Separator sync separator separates the sync signals such as H sync V sync or composite sync from the conditioned REF signal if the signal contains the sync AID Converter The A D converter digitizes the analog input signal to 10 bits digital data for genlock operation This data is read by the CPU in the mainframe and used to control the master oscillator frequency Genlock Controller This block controls the A D converter memory and sync separator to obtain correct digital data Black Burst Generator The Black Burst Generator consists of the following blocks Black Burst Generator This block generates NTSC or PAL black burst digital data Trilevel Sync Generator This block generates trilevel sync digital data D A Converter amp Amp This block consists of a D A converter two amplifiers and a filter It converts the digital data from the black burst generator or trilevel sync generator to an analog signal and reconstructs the signal for output The D A Converter amp Amp 3 also has
171. ion and Cleaning preventive maintenance See page xxi m Repackaging Instructions See page xxii Removal and Replacement See page 2 3 Troubleshooting See page 1 24 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period Electrostatic Damage This instrument contains electrical components that are susceptible to damage Prevention from electrostatic discharge Static voltages of 1 kV to 30 kV are common in unprotected environments CAUTION Static discharge can damage any semiconductor component in this instrument TG700 TV Signal Generator Platform Service Manual xix Maintenance for Generators and Modules XX Observe the following precautions to avoid static damage Minimize handling of static sensitive components Transport and store static sensitive components or assemblies in their original containers on a metal rail or on conductive foam Label any package that contains static sensitive assemblies or components Discharge the static voltage from your body by wearing a wrist strap while handling these components Servicing static sensitive assemblies or components should only be performed at a static free workstation by qualified personnel Nothing capable of
172. ircuit board See Figure 3 2 Adjust R481 so that the output gain is 1 V 1 mV Move the BNC cable from the BLACK 2 connector to the BLACK 3 connector on the AGL7 Genlock module Locate variable resistor R581 on the AGL7 circuit board See Figure 3 2 Adjust R581 so that the output gain is 1 V 1 mV TG700 TV Signal Generator Platform Service Manual AGL7 Analog Genlock Adjustment Procedures Clock Timing Adjustment Board Number 671 B089 XX and 671 B279 00 Only Preparation perform the clock timing adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors on the AGL7 circuit board See Figure 3 2 Procedure WARNING avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 1 Select the NTSC Black Burst signal for BLACK 1 and BLACK 2 and 1080 59 94i signal for BLACK 3 as follows a Press the left lt 4 or right gt arrow button to select BLACK 1 and then press the ENTER button Press the left lt 4 or right amp arrow button to select NTSC and then press the ENTER button Press the left lt 4 or right gt arrow button to select Black Burst and then press the ENTER button Press the CANCEL button twice to return the AGL7 m
173. ired for troubleshooting Table 8 3 Equipment required for DVG7 Digital Video Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the troubleshooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up A or down arrow button to select SAVE 4 Press the left lt 4 or right f arrow button to select a preset number to save instrument settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual Troubleshooting Trees DVG7 Digital Video Generator Troubleshooting Power on the TG700 in factory mode and execute diagnostics as follows 1 Connect the power cable to the instrument with the FRONT PANEL ENABLE button pressed 2 Press the up and down arrow button to select UTILITY and then press the ENTER button 3 Press the up and down arrow button to select DIAGNOSTICS and then press the ENTER button 4 Press the left and right arrow b
174. ital multimeter 1 5 1 2 digits FLUKE 8842A 75 Q BNC cable 1 Length 42 inches Tektronix part number 012 0074 00 75 coaxial precision 1 75 Q 0 1 Tektronix part number 011 0102 03 terminator BNC T connector Tektronix part number 103 0030 00 BNC female to dual banana adapter Tektronix part number 103 0090 00 GPS antenna feed with good signal level Less than 5 dB attenuation since last amplifier Trimble Bullet Ill 5v 35 dB gain antenna with F connector or equivalent Cable use only if you do not have a GPS feed up to 200 ft Belden 1694A or equivalent with an F connector on one end and a BNC connector on the other end 9 4 TG700 TV Signal Generator Platform Service Manual GPS7 Adjustment Procedures GPS7 Black Burst Adjustments Black burst level and offset adjustments Perform the following procedure to adjust the GPS7 Black Burst Level and Black Burst Offset 1 Press the MODULE FORMAT and FRONT PANEL ENABLE buttons simultaneously then release the MODULE and FORMAT buttons Continue to hold the FRONT PANEL ENABLE button until you see the Startup with Factory Mode message then release the button 2 Connect the Black 1 output to the multimeter as shown See Figure 9 2 75 Q BNC cable Digital multimeter TG700 m
175. ite for a list of offices www tektronix com Module repair and return You may ship your module to us for repair after which we will return it to you New modules You may purchase replacement modules in the same way as other replacement parts Using the Replaceable Parts List This section contains a list of the mechanical and or electrical components that are replaceable for the TG700 Use this list to identify and order replacement parts The following table describes each column in the parts list Table 1 6 Parts list column descriptions Column Column name Description 1 Figure amp Index Number Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow 2 Tektronix Part Number Use this part number when ordering replacement parts from Tektronix 3 and 4 Serial Number Column three indicates the serial number at which the part was first effective Column four indicates the serial number at which the part was discontinued No entries indicates the part is good for all serial numbers 5 Qty This indicates the quantity of parts used 6 Name amp Description An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification Abbreviations Abbreviations conform to American National Standard ANSI Y1 1 1972 1 32 TG
176. ith deionized water TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Maintenance Inspection Exterior Inspect the outside of the TG700 for damage wear and missing parts using the following table as a guide A TG700 that appears to have been dropped or otherwise abused should be checked thoroughly to verify correct operation and performance Immediately repair defects that could cause personal injury or lead to further damage to the TG700 Table 1 2 External inspection checklist Item Inspect for Repair action Cracks scratches deformations damaged hardware or gaskets Cabinet front panel and cover Repair or replace defective module Front panel buttons Missing or damaged Repair or replace missing or buttons defective buttons Connectors Broken shells cracked Repair or replace defective insulation and deformed modules Clear or wash out contacts Dirt in connectors dirt Accessories Missing items or parts of Repair or replace damaged items bent pins broken or frayed cables and damaged connectors or missing items frayed cables and defective modules Cleaning Procedure Exterior To clean the TG700 exterior perform the following steps 1 Remove loose dust on the outside of the TG700 with a lint free cloth 2 Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners 3 Clea
177. ive measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period 4 2 TG700 TV Signal Generator Platform Service Manual ATG7 Analog Test Generator Removal and Replacement ATG7 Analog Test Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the ATG7 Generator module Tools Required The following tools are required to perform the removal and replacement procedures Table 4 1 Required tools for removal and replacement of ATG7 Test Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the ATG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel replace the rear panel connector Connectors 1 Use the Removing a Module section to remove the ATG7 Generator module from the mainframe See page 1 41 Removing a Module 2 Disconnect the cables
178. iver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the BG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Use the Removing a Module section to remove the BG7 Generator module from the mainframe See page 1 41 Removing a Module Disconnect the cables at P830 BLACK 1 J880 BLACK 2 J930 BLACK 3 and J980 BLACK 4 on the BG7 circuit board Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away Perform steps 2 and 3 in reverse order to replace the connector Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a Z2 Phillips tip to remove the six screws securing the BG7 circuit board to the chassis TG700 TV Signal Generator Platform Service Manual 7 9 Black Generator Removal Replacement Lift the circuit board up and away from chassis and then place it on a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a scre
179. le Use this list to identify and order replacement parts Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 10 8 HD3G7 HD 3 Gb s SDI Video Generator replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 10 5 1 116 1146 00 1 MODULE ASSEMBLY HD3G7 2 211 0408 00 8 SCR ASSY WSHR 4 40 X 0 250 PNH STEEL ZINC FINISH T 10 TORX DR SEMS 3 878 0199 00 1 CIRCUIT BD SUB ASSEMBLY SDI INPUT 389409500 WIRED 4 878 0200 00 1 CIRCUIT BD SUB ASSEMBLY SDI OUTPUT 389409600 WIRED 5 131 M057 00 4 CONN RF PCB FEMALE BNC 750HM EDGE LAUNCH 6 348 1944 00 1 GAP PAD 3000530 T 214 5166 00 1 HEATSINK PCB TO CHASSIS 8 441 2555 00 1 CHASSIS MODULE 9 333 4576 00 1 PANEL REAR SAFETY CONTROLLED 10 214 4946 01 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 MM SUS304 5 4 MML 11 213 1129 01 2 SCREW MACHINE M2 5 X 11MM L PAN HD STL NI PL CROSS amp SLOTTED 12 220 0497 00 4 NUT PLAIN HEX 5 28 X 562 HEX BRS NI NICKEL PLATED 13 210 1039 00 4 WASHER LOCK 0 521 ID INT 0 025 STEEL ZINC FINISH 14 211 0101 00 3 SCREW MACHINE 4 40 X 0 25 FLH 100 DEG ZINC PLATED STEEL T8 10 22 TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Replaceable Parts List Step 2 Peel protective plastic from the h
180. level or 1 V This feature is available through jumper J452 on the circuit board Bus Interface Channel 1 2 Buffer Channel 3 4 Buffer Audio Data Controller Channel 546 Buffer 5 6 Channel 7 8 Buffer 7 8 m gt SILENCE oe 48 kHz Clock 48kHz CLOCK Decoder Figure 2 1 Simplified block diagram of the AG7 Generator module TG700 TV Signal Generator Platform Service Manual 2 1 AG7 Audio Generator Maintenance Audio Generator Maintenance This section contains instructions and procedures for maintaining the AG7 Generator module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 2 3 m Troubleshooting See page 2 5 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period 2 2 TG700 TV Signal Generator Platform Service Manual AG7 Audio Generator Removal and Replacement AG7 Audio Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the Tools Required AG7 Generator module The following tools are required to perfo
181. me oven and MTOD counter to the incoming GPS The TG700 OCXO and related circuits produce the 54 MHz and 74 MHz clocks for all modules used in the TG700 Signal Generator System Genlock Control Loop When in Genlock mode the Black 1 output is turned off and the BNC is used as an input The input reference video is buffered then drives a sync separator and an Analog to Digital Converter ADC The sync signals allow the Genlock logic to roughly align the internal sync to the incoming video The sync signal also allows the genlock logic to window on the ADC samples from the sync edge or the burst The samples are read by the SW which then closes the loop by writing to the DAC that controls the OCXO This sets the phase and frequency of all the internal clocks TG700 TV Signal Generator Platform Service Manual 9 GPS7 Theory of Operation 9 2 MTOD Clock Outputs Time Code Reader The Genlock Control Loop is only available on GPS7 modules with the REF IN connector on the rear panel The Master Time of Day MTOD clock contains the precise current time which is phase locked to the selected time source The MTOD is used for all time code generation and positioning of the frame reset pulses The three Black Generation Engines and the four LTC engines each receive one of three frame reset pulses from the TG700 mainframe which lock the video frames in all engines to exact references based on MTOD In order for many units to have the s
182. ment procedures 12 6 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator Maintenance HDVG7 HDTV Digital Video Generator Maintenance This section contains instructions and procedures for maintaining the HDVG7 Generator module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 12 8 m Troubleshooting See page 12 10 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period TG700 TV Signal Generator Platform Service Manual 12 7 HDVG7 HDTV Digital Video Generator Removal and Replacement HDVG7 HDTV Digital Video Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the HDVG7 Generator module Tools Required The following tools are required to perform the removal and replacement procedures Table 12 2 Required tools for removal and replacement of HDVG7 HDTV Digital Video Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 siz
183. ment settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up A or down arrow button to select SAVE 4 Press the left lt 4 or right f arrow button to select a preset number to save instrument settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual Troubleshooting Trees HDVG7 HDTV Digital Video Generator Troubleshooting Power on the TG700 in factory mode and execute diagnostics as follows 1 Connect the power cable to the instrument with the FRONT PANEL ENABLE button pressed 2 Press the up and down arrow button to select UTILITY and then press the ENTER button 3 Press the up and down arrow button to select DIAGNOSTICS and then press the ENTER button 4 Press the left and right arrow button to select Memory and then press the ENTER button Is the message Fail HDVG7 Diag error displayed Replace the module Perform the Functional Check procedures in the user manual Figure 12 4 Troubleshooting procedure 1 TG700 TV Signal Generator Platform Service Manual 12 11 HDVG7 HDTV Digital Video Generator Troubleshooting Power off and remove the module and then install it into the TG700 mainframe that is
184. messages appear on the display 3 Press the front panel MODULE button Is the main menu displayed Replace the module Perform the Functional Check procedures in the user manual Figure 4 2 Troubleshooting procedure 1 4 6 TG700 TV Signal Generator Platform Service Manual ATG7 Analog Test Generator Troubleshooting Power off and remove the module and then install it into the TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the TG700 mainframe Refer to Trouble operating correctly shooting in the 76700 TV Signal Generator Platform Service Manual Is the module module OK Replace the module Figure 4 3 Troubleshooting procedure 2 TG700 TV Signal Generator Platform Service Manual 4 7 ATG7 Analog Test Generator Diagram ATG7 Analog Test Generator Diagram The following figure shows the ATG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the TG700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the ATG7 Generator module is located in the ATG7 Theory of Operation section See page 4 1 Generator module TG700 mainframe O J830 A10 Main board v J880 BLACK 2 Slot 2 4 SIGNA
185. module module in another slot or mainframe If that is not possible or if that fails then replace the HD3G7 module configured Check the SW version If necessary reload the Module flash that holds the FPGA configuration file If the SW is current and correctly installed and this error is still encountered then replace the HD3G7 module FPGA R W check 0x55 failed 0x20040A These errors indicate the main processor FPGA R W check 0x55 failed 0 20040 cannot communicate with the FPGA on the FPGA R W check OxAA failed 0x20040A HD3G7 module If possible try the module in FPGA R W check failed 0x20040C another slot or mainframe If that is not possible or if that fails then replace the HD3G7 module 10 16 Check module diagnostics There are several internally detected physical measurements which are reported by the HD3G7 module diagnostics Use this procedure to access the module diagnostics 1 Press the Module button to select HD3G7 x 2 Press the up A or down V arrow buttons to choose Diagnostics and then press the Enter button to enter the diagnostics submenu 3 Press the left lt 4 or right gt arrow buttons to scroll through these diagnostic tests PLL Status Jit Locked should be displayed in converter mode and Flex1 Lock should be displayed in generator mode If the appropriate Locked message is not displayed when expected it can indicate a problem wit
186. module does not 5 Error copying DO Fpga to GPS7 EEPROM show an error code return the Error copying Fpga to GPS7 EEPROM GPS7 module for repair 9 DO Fpga constant check 0x55 at addr 0x501000 10 DO Fpga R W error writes 0x5555 to addr 0x501024 and confirms 11 DO Fpga R W error writes OxAAAA to addr 0x501024 and confirms 12 BB Fpga R W error writes 0x5555 to addr 0x400008 and confirms 13 Fpga R W error writes OxAAAA to addr 0x400008 and confirms 14 DO fpga Trimble Module communications error GPS receiver is disconnected or failed 255 Not an error This code may appear following some firmware updates No action Check installed software Use this procedure to check the installed software versions 1 Access the Utilities menu a From the TG700 main menu press the up or down V arrow buttons to select UTILITY b Press the ENTER button to enter the utility submenu 2 Access the Software Version information a Press the up A or down arrow buttons to select VERSION INFO F W CPU 0 b Read the firmware version 3 Ifthe CPU is not Ver 5 11 or later then install current software The latest software is available on the Web at www tektronix com software 4 Check that the GPS7 module version is v5 12 or later a Press the left 4 or right gt arrow buttons to select GPS7 1 b Read the firmware version 5 Ifthe GPS7 software is not Ver 5 12 or later then install current software The latest s
187. module slowly in a horizontal direction back from the mainframe TG700 TV Signal Generator Platform Service Manual 1 21 TG700 Mainframe Removal and Installation Procedures 4 Remove the A40 LAN board See Figure 1 9 a f Use a screwdriver with a 2 Phillips tip to remove the screw securing the top cover to the chassis Lift the cover up and away from the chassis to complete the removal Unplug the cable from the fan at J120 on the A40 LAN board Unplug the cable from the A30 POWER CONNECT board at J110 on the A40 LAN board When reconnecting this cable make sure that it is completely within the cable guide Use a screwdriver with a 2 Phillips tip to remove the three screws securing the A40 LAN board to the chassis Lift the board up and away from the chassis to complete the removal 5 Remove the Fan See Figure 1 9 a b c Unplug the fan s power cable from J120 on the A40 LAN board Use a screwdriver with a Z2 Phillips tip to remove the four screws securing the fan to the chassis Lift the fan up and away from the chassis to complete the removal 6 Remove the RFI filter See Figure 1 9 a b d Unplug the two cables from the RFI filter Use a 7 mm nut driver to remove the nut securing the ground lead to the chassis Use a screwdriver with a 2 Phillips tip to remove the two screws securing the RFI filter to the chassis Pull the RFI filter away 7 Reinstallation a b
188. ms showing mainframe component interconnections such as power supply and oscillator can be found in the 7G700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the AGL7 Genlock module is located in the AGL7 Theory of Operation section See page 3 1 AGL7 Genlock module TG700 mainframe E Co FD J000 A10 A10 Main board Main board 77 c Slot 1 REF i 77 i 9 Cw F 48 kHz CLOCK 77 a 9 Rear panel connectors e BLACK 1 99 bi e 77 BLACK 2 F F e 77 COO e BLACK 3 99 3 3 Figure 3 8 AGL7 Genlock module connections TG700 TV Signal Generator Platform Service Manual 3 17 AGL7 Analog Generator Module Replaceable Parts List AGL7 Analog Generator Module Replaceable Parts List This section contains a list of the replaceable modules for the AGL7 Genlock module Use this list to identify and order replacement parts For parts ordering or servicing information see Parts Ordering Information or Module Servicing in the TG700 Mainframe Replaceable Parts List section of this manual See page 1 31 TG700 Mainframe Replaceable Parts List Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 3 4 AGL7 Analog Generator module replaceable parts Fig amp index Tektronix Ser
189. must be replaced DDS SWEEP This diagnostic capability is available only in factory mode and is not used in normal module troubleshooting Check installed software Use this procedure to check the installed software versions 1 Access the Utilities menu a From the TG700 main menu press the up or down V arrow buttons to select UTILITY b Press the ENTER button to enter the utility submenu 2 Access the Software Version information a Press the up or down V arrow buttons to select VERSION INFO F W CPU 0 b Read the firmware version 3 Ifthe CPU is not Ver 5 2 or later then install current software The latest software is available on the Web at www tektronix com software TG700 TV Signal Generator Platform Service Manual 10 17 HD3G7 HD 3 Gb s SDI Video Generator Maintenance 4 Check that the HD3G7 module version is v5 21 or later a Press the left lt 4 or right amp arrow buttons to select HD3G7 1 b Read the firmware version 5 Ifthe HD3G7 software is not Ver 5 21 or later then install current software The latest software is available on the Web at www tektronix com software NOTE Make sure to follow all the instructions to ensure that the FPGA configuration data is loaded into the module flash Verify configuration The HD3G7 can be configured to operate in either generator mode or converter mode depending on your operational requirements To eliminate the co
190. n arrow button to select CALIBRATION and then press the ENTER button 7 Verify that the message CALIBRATION result 0xxxxx is displayed This completes the master clock frequency adjustment procedures 1 4 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Maintenance TG700 Mainframe Maintenance This section contains the information needed to do periodic and corrective maintenance on the TG700 The following subsections are included Preparation Introduction plus general information on preventing damage to internal modules when doing maintenance Inspection and Cleaning Information and procedures for inspecting the TG700 and cleaning its external and internal modules Removal and Installation Procedures Procedures for the removal of defective modules and replacement of new or repaired modules Troubleshooting Information for isolating and troubleshooting failed modules Included are instructions for operating the TG700 s internal diagnostic routines and troubleshooting trees Related Maintenance Procedures Preparation Preventing ESD The following section contain information and procedures related to maintenance Theory of Operation contains a circuit description at the module or block level Adjustment Procedures addresses after repair adjustment and the interval between periodic adjustments It contains a procedure for adjusting the master clock frequency of the TG700 Diag
191. n the light filter protecting the monitor screen with a lint free cloth dampened with a gentle general purpose detergent and water solution N CAUTION To prevent getting moisture inside the TG700 during external cleaning use only enough liquid to dampen the cloth or applicator Inspection Interior To access the inside of the TG700 for inspection and cleaning refer to the Removal and Installation Procedures in this section Inspect the internal portions of the TG700 for damage and wear using the table as a guide Defects found should be repaired immediately CAUTION prevent damage from electrical arcing ensure that circuit boards and components are dry before applying power to the TG700 TG700 TV Signal Generator Platform Service Manual TG700 Mainframe Maintenance Table 1 3 Internal inspection checklist Item Inspect for Repair action Circuit boards Loose broken or corroded solder connections Burned circuit boards Burned broken or cracked circuit run plating Remove failed module and replace with a fresh module Resistors Burned cracked broken blistered condition Remove failed module and replace with a fresh module Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Corroded solder on leads or terminals Remove damaged module and replace with a fresh module from t
192. n to select GBR SYNC c Press the left 4 or right amp arrow button to select Sync ON Channels and then press the ENTER button 10 Adjust 756 so that the CH 2 blanking level is aligned to the CH 1 blanking level 11 Move the BNC cable from the CH 2 connector to the CH 3 connector on the AVG7 Generator module 12 Adjust 656 so that the CH 3 blanking level is aligned to the CH 1 blanking level 13 Change the oscilloscope settings as follows Vertical offset 150 mV CH 1 and CH 2 Horizontal delay time 2 ns div Delayed runs time 6 224 us Delayed Only 14 Check the time delay between the CH 1 and CH 3 signals and then perform the following steps a Ifthe CH 1 signal is delayed from the CH 3 signal move the BNC cable from the CH 3 connector to the CH 2 connector on the AVG7 Generator module b Ifthe CH 3 signal 1s delayed from the CH 1 signal move the BNC cable from the CH 1 connector to the CH 2 connector on the AVG7 Generator module 15 Using the most delayed signal as a reference adjust the following variable capacitors so that the other signals are delayed within 0 5 ns from the most delayed signal CH 1 output C837A CH 2 output C737A CH 3 output C637A TG700 TV Signal Generator Platform Service Manual 5 19 AVG7 Analog Video Generator Adjustment Procedures Frequency Response Confirmation After you have performed the group delay adjustment be sure to check that the frequency response
193. nector on the AVG7 Generator module Locate variable resistor R656A on the AVG7 circuit board See Figure 5 2 Adjust R656A so that the output offset is 0 V 1 mV Move the BNC cable from the upper CH 3 connector to the upper CH 1 connector on the AVG7 Generator module Press the left 4 or right gt arrow button to select 700 397mV and then press the ENTER button Locate variable resistors R851A coarse and R851B fine on the AVG7 circuit board See Figure 5 2 Adjust R851A and R851B so that the output gain is 700 4 mV 1 mV Move the BNC cable from the upper CH 1 connector to the upper CH 2 connector on the AVG7 Generator module Locate variable resistors R751A coarse and R751B fine on the AVG7 circuit board See Figure 5 2 Adjust R751A and R751B so that the output gain is 700 4 mV 1 mV Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AVG7 Generator module Locate variable resistors R651A coarse and R651B fine on the AVG7 circuit board See Figure 5 2 Adjust R651A and R651B so that the output gain is 700 4 mV 1 mV TG700 TV Signal Generator Platform Service Manual AVG7 Analog Video Generator Adjustment Procedures 22 Move the BNC cable from the upper CH 3 connector to the upper CH 2 connector on the AVG7 Generator module 23 Select the DAC Gain YPbPr 0 mV calibration signal for CH 2 and CH 3 as follows a Pressthe CANCEL button to displa
194. nerates timings to multiplex the line memory data and the overlay data used for a circle ID text and logo overlay This block consists of an audio control packet generator a data packet generator an MPU interface and an SRAM controller The formatter inserts embedded audio data in serial digital signals The memory contains embedded audio data This block converts a 10 bits parallel data to SDI signal This block generates black or gray 40 gray signal for the BLACK 1 and BLACK 2 outputs TG700 TV Signal Generator Platform Service Manual 8 1 DVG7 Digital Video Generator Theory of Operation Bus Interface Address Generator Overlay Controller Overlay Memory SIGNAL 1 Formatter gt SIGNAL 2 Serializer Black Generator Option BK only BLACK 1 Formatter gt BLACK 2 Serializer Figure 8 1 Simplified block diagram of the DVG7 Generator module 8 2 TG700 Signal Generator Platform Service Manual DVG7 Digital Video Generator Adjustment Procedures DVG7 Digital Video Generator Adjustment Procedures The only adjustment in the DVG7 Generator module is for the output level Requirements for Adjustment Before doing the adjustment note the following requirements Personnel This procedure is only to be performed by trained service technicians Warm Up Period The DVG7 Generator module requires a 20 minute warm up time in a 20
195. nerator Platform Service Manual 9 9 GPS7 Module Maintenance GPS7 Module Maintenance This section contains instructions and procedures for maintaining the GPS7 module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 9 10 m Troubleshooting If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period GPS7 Module Removal and Replacement Tools Required Remove the GPS7 Module This section contains instructions on how to remove and replace the customer parts of the GPS7 module Table 9 2 Required tools for GPS7 removal and replacement Tektronix part Name Description number Screwdriver handle Accepts inch screwdriver bits Standard tool T10 TORX tip TORX driver bit for T10 size screw heads Standard tool Flat or Phillips tip Small tip for removing the module from the Standard tool mainframe 9 16 inch wrench Wrench or deep nut driver to remove nuts Standard tool from BNC connectors 3 4g inch socket Socket or nut driver to remove jackscrews Standard tool from DSUB connector Use the Removing a Module section to remove the GPS7 m
196. nerator Theory of Operation This section describes the basic operation of the major circuit blocks in the ATG7 Generator module Bus Interface This block provides the communication between the mainframe and the module circuit Black Burst Generator This block generates NTSC or PAL black burst digital data BARS Generator This block generates digital data for color bars black burst and other signals SIGNAL Generator This block generates digital data for the test signals assigned to the front panel buttons D A Converter amp Amp This block consists of a D A converter two amplifiers and a filter It converts the digital data from the black burst generator BARS generator and SIGNAL generator to analog signal and reconstruct the signal for output 2 ET S BLACK 1 ane BLACK 2 dis m te BARS 2 SIGNAL Figure 4 1 Simplified block diagram of the ATG7 Generator module TG700 TV Signal Generator Platform Service Manual 4 1 ATG7 Analog Test Generator Maintenance ATG7 Analog Test Generator Maintenance This section contains instructions and procedures for maintaining the ATG7 Generator module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 4 3 m Troubleshooting See page 4 5 If the instrument does not function properly troubleshooting and correct
197. nfiguration as the source of a problem set the module to the factory default 1 Ifnecessary save the user configuration in a preset The user configuration may already be saved as the power on preset 2 Restore the factory default a b c f Press the MODULE button until TG700 appears Press Enter to select Preset Press the up or down V arrow button to select RECALL Press the left lt 4 or right gt arrow button to select Factory Default Press the ENTER button to reset the instrument to the factory default settings Press the CANCEL button to return the TG700 main menu 3 Check to see if the problem still exists If the problem has been fixed compare the settings between the factory default and the user configuration to find the issue See Table 10 7 Table 10 7 HD3G7 module factory default settings Men item name Settings STATUS 1080 59 94p SMPTE Color Bars 3 Gb s Level YCbCr 4 2 2 10b OUTPUT MODE Level A MOVING PICTURE H Step 0 Sample s V Step 0 Line s Period 1 Frame s Random Disable 10 18 TG700 TV Signal Generator Platform Service Manual HD3G7 HD 3 Gb s SDI Video Generator Maintenance Table 10 7 HD3G7 module factory default settings cont Men item name Settings TIMING Vertical 0 Line s Horizontal 0 0000 us VIDEO Y ON Cb ON ON TRIGGER OUTPUT System Clock Check power supplies The module diagnostics check most of the power supplies but there are
198. ng statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Symbols and Terms onthe These terms may appear on the product Product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product The following symbol s may appear on the product A AB CAUTION WARNING Double Protective Ground Refer to Manual High Voltage Insulated Earth Terminal TG700 TV Signal Generator Platform Service Manual xiii Service Safety Summary Service Safety Summary xiv Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service procedures Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test lea
199. ng the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the six screws securing the DVG7 circuit board to the chassis Lift the circuit board up and away from chassis and then place it on a static free surface If Option BK is installed skip this step a Useascrewdriver with a 2 Phillips tip to remove the two screws securing the rear panel to the chassis Set the replacement chassis on a firm flat static free work surface If Option BK is installed skip this step a Use a screwdriver with a 2 Phillips tip to install the two screws securing the rear panel to the chassis Use a screwdriver with a 2 Phillips tip to install the six screws securing the circuit board to the chassis TG700 TV Signal Generator Platform Service Manual 8 9 DVG7 Digital Video Generator Troubleshooting DVG7 Digital Video Generator Troubleshooting Equipment Required This section contains instructions and procedures for troubleshooting the DVG7 Generator module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the TG700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed in the following table is requ
200. nge of 658 8 mV to 668 8 mV TG700 TV Signal Generator Platform Service Manual 7 7 Black Generator Maintenance BG7 Black Generator Maintenance This section contains instructions and procedures for maintaining the BG7 Generator module Before following these procedures read Maintenance for Generators and Modules See page xix The following information can be found in this section m Removal and Replacement See page 7 9 m Troubleshooting See page 7 11 If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to prevent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period 7 8 TG700 TV Signal Generator Platform Service Manual BG7 Black Generator Removal and Replacement BG7 Black Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the BG7 Generator module Tools Required The following tools are required to perform the removal and replacement procedures Table 7 2 Required tools for removal and replacement of BG7 Black Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screws 2 Phillips tip Phillips driver bit for 2 size screws Nut dr
201. ngerous potentials exist at several points within the TG700 mainframe 1 Use the 75 Q BNC cable and the 75 signal adapter to connect the upper CH 1 connector on the AVG7 Generator module to the CH 1 input connector on the oscilloscope See Figure 5 12 2 Use the 75 Q BNC cable and the 75 Q signal adapter to connect the upper CH 2 connector on the AVG7 Generator module to the CH 2 input connector on the oscilloscope See Figure 5 12 3 Use the 75 Q BNC cable and the 75 Q feed through termination to connect the BLACK 1 connector on the test signal generator to the CH 3 input connector on the oscilloscope See Figure 5 12 TG700 TV Signal Generator Platform Service Manual 5 17 AVG7 Analog Video Generator Adjustment Procedures Oscilloscope TDS784D Test signal M gt 9 generator ATG7 AVG7 module 2 TG700 mainframe 0 oe Z 1 C Z FL D n e ale GC I 2 75 signal adapter 75 Q feed through 75 Q BNC cable 72 inches 75 Q BNC cable 72 inches 75 BNC cable 72 inches Figure 5 12 Equipment connection for adjusting the interchannel delay 4 Setthe oscilloscope settings as indicated below Vertical scale CH 1 and CH 2 5 mV div CH 3 1 00 V div Bandwidth 250 MHz CH 1 and CH 2 Vertical offset 0 mV CH 1 and CH 2
202. ns instructions and procedures for troubleshooting the AWVG7 Generator module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the TG700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed in the following table is required for troubleshooting Table 6 3 Equipment required for AWVG7 Analog Wideband Video Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the troubleshooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up A or down arrow button to select SAVE 4 Press the left lt 4 or right gt arrow button to select a preset number to save instrument settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual 6 17 AWVG7 Analog Wideband Video Generat
203. ntains a series of pointers that control the order the video lines stored in the Line Memory are used to produce digital signals This block consists of an MPU interface and an overlay controller It inserts data from the Overlay Memory into the Line Memory data stream to create circular patterns ID text and logo Overlay memory generates timings to multiplex the line memory data and the overlay data used for a circle ID text and logo overlay This block consists of a D A converter two amplifiers and a filter It converts the digital data from the Overlay Controller to analog signal and reconstruct the signal for output TG700 TV Signal Generator Platform Service Manual 6 1 AWVG7 Analog Wideband Video Generator Theory of Operation Bus Interface Line Memory for YIG Line Memory for Pb B Line Memory for Pr R Address Generator D A Converter amp Amp D A Converter Overlay amp PbiB Controller D A Converter amp Amp Overlay Memory Figure 6 1 Simplified block diagram of the AWVG7 Generator module 6 2 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Adjustment Procedures AWVG7 Analog Wideband Video Generator Adjustment Procedures This section contains information needed to adjust the AWVG7 Generator module Adjustment in the AWVG7 Generator module are for the output offset and gain frame timing and clock timing and frequency resp
204. ocedures Item No Minimum requirement Recommended equipment TV signal generator platform 1 Tektronix TG700 Oscilloscope 1 Bandwidth 1 GHz or higher Function Tektronix TDS784D Option 2C Mask testing Digital multimeter 1 5 1 2 digits FLUKE 8842A Peak detector amplifier 1 Tektronix part number 015 0408 00 and TM500 series power supply Peak detector head 1 Tektronix part number 015 0413 00 Probe 2 X 10 Tektronix P6139A 75 Q BNC cable 2 Length 72 inches Tektronix part number 012 0159 01 75 Q BNC cable 1 5C 2V 1m Canare DH5C01 S SA 75 feed through termination 1 Tektronix part number 011 0103 02 75 Q coaxial termination 1 Tektronix part number 011 0102 03 BNC T connector 1 Tektronix part number 103 0030 00 BNC female to dual banana 1 Tektronix part number 103 0090 00 adapter BNC female to female connector Canare BCJ J Flat blade screwdriver for adjusting C604B C704B and C804B Bit shape 0 8X0 35 mm Murata KMDRO60 Output Offset and Gain Adjustment Preparation 6 4 To perform the output offset and gain adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors on the AWVG7 circuit board See Figure 6 2 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Adjustment Procedures 757 851 R856A R851A R756A E
205. odule If the TG700 mainframe does not boot up or if the display 1s not working refer to the 7G700 Troubleshooting section in this manual See page 1 24 7G700 Mainframe Troubleshooting The equipment listed in the following table is required for troubleshooting Table 4 2 Equipment required for ATG7 Test Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin troubleshooting create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up or down arrow button to select SAVE 4 Press the left A or down arrow button to select a preset number to save instrument settings 5 Press the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual 4 5 ATG7 Analog Test Generator Troubleshooting Troubleshooting Trees Power on the TG700 as follows 1 Connect the power cable to the instrument 2 Wait until the mainframe and the module completely initialize Check that no error
206. odule from the mainframe See page 1 41 Removing a Module TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance Replacing the ANTENNA POWER Indicator Light Pipe CAUTION Do not remove the light pipe board connector from the board unless you have a replacement board connector available Removing the light pipe board connector damages it so it can not be reused 1 Pullthe light pipe out of its board connector This is a slip fit and should come apart easily 2 Remove the external rear panel a Use the 9 15 inch wrench to remove the nuts from the four BNC connectors on the rear panel b Move the external rear panel away from the chassis pulling the light pipe out with it 3 Pull the light pipe out of the light pipe lens in the external rear panel This is a slip fit and should come apart easily 4 Gently remove the light pipe lens from the external rear panel 5 When reassembling follow this sequence a Insert the light pipe into the light pipe lens b Thread the light pipe through the external rear panel until the lens is against the rear panel c Gently push the light pipe lens into place in the rear panel d Replace the external rear panel e Plug the light pipe into the light pipe board connector NOTE The Black 1 Black 2 and Black 3 BNC connectors are not customer replaceable Replacing Damaged Connectors Antenna connector To remove the Antenna connector
207. of the major circuit blocks in the HDVG7 Generator module This block provides the communication between the mainframe and the module circuit This block consists of a frame delay an MPU interface a sequencer an SDRAM controller and a blanking data generator It interfaces the Frame Memory and the Line Memory and controls the output sequence of the video data in these memories Frame memory contains a series of pointers that control the order the video lines stored in Line Memory are used to produce serial digital signals Line memory holds the actual sample points which define a serial digital signal This block consists of an MPU interface and an overlay controller It inserts data from the Overlay Memory into the Line Memory data stream to create circular patterns ID text and logo The memory generates timings to multiplex the line memory data and the overlay data used for a circle ID text and logo overlay This block consists of a line number and CRC generator an audio control packet generator a data packet generator an MPU interface and an SRAM controller It inserts line numbers and embedded audio data in the serial digital signals The memory contains embedded audio data The serializer converts a 20 bits parallel data to SDI signal This block generates black or gray 40 gray signal for the BLACK 1 and BLACK 2 outputs HDVG7 HDTV Digital Video Generator Theory of Operation Bus Addre
208. oftware is available on the Web at www tektronix com software 9 16 TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance Verify configuration Before beginning any of these procedures the GPS7 under test and the GPS7 reference unit must be configured to correctly use the GPS signal If they do not have the correct configuration it will cause problems while troubleshooting The best way to ensure a common setup is to set both instruments to the factory presets Press the MODULE button until TG700 appears Press ENTER to select PRESET If needed use the up or down arrow buttons to select Recall Press the left 4 arrow button until Factory Preset appears Press the ENTER button to load the preset A nw FF YS c When loading is complete press the CANCEL button to exit the Factory Default menu When finished troubleshooting disconnect and reconnect the power cord to cycle the power This will return the unit s to the user settings that were in effect before invoking the factory presets Check GPS antenna signal source For proper operation an outside antenna signal source must be connected to the GPS7 module and functioning correctly If a sufficient signal is not applied to the antenna connector the GPS7 module will not operate properly Use this procedure to verify the antenna signal 1 Press the MODULE button to select GPS7 1 2 Ifnecessary use the up or down V arrow buttons to
209. on and Cleaning General Care Inspection and Cleaning Procedures A Inspection and Cleaning describes how to inspect for dirt and damage It also describes how to clean the exterior and interior of the TG700 Inspection and cleaning are done as preventive maintenance Preventive maintenance when done regularly may prevent TG700 malfunction and enhance its reliability Preventive maintenance consists of visually inspecting and cleaning the TG700 and using general care when operating it How often preventive maintenance should be performed depends on the severity of the environment in which the TG700 is used A proper time to perform preventive maintenance is just before TG700 adjustment The top cover helps keep dust out of the TG700 and is needed to meet EMI and cooling requirements The top cover should be in place when operating the TG700 Inspect and clean the TG700 as often as operating conditions require The collection of dirt on components inside can cause them to overheat and breakdown Dirt acts like an insulating blanket preventing efficient heat dissipation Dirt also provides an electrical conduction path that could cause a TG700 failure especially under high humidity conditions CAUTION Avoid the use of chemical cleaning agents that might damage the plastics used in this TG700 Use only deionized water when cleaning the menu buttons or front panel buttons Use an ethyl alcohol solution as a cleaner and rinse w
210. onse Requirements for Adjustment Personnel This procedure is only to be performed by trained service technicians Warm Up Period AWVG7 Generator module requires a 20 minute warm up time in a 20 C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance WARNING To avoid potential shock use caution when removing TG700 mainframe top cover with power connected Access When adjusting the AWVG7 Generator module you need to remove the top cover of the TG700 mainframe See page 1 15 Cover NOTE If the serial number of your instrument is 010600 and above replace the resistor and capacitor numbers in the figures and procedures as follows R6xxx R xxx 1 for example R651A R651A_1 R7xxx R xxx 2 for example R751A R651A_2 R8xxx 3 for example R651A4 R651A 3 R xxx 1 for example C604B 604 1 C7xxx R6xxx_2 for example C704B 604 2 C8xxx 3 for example C804B 604 3 TG700 TV Signal Generator Platform Service Manual 6 3 AWVG7 Analog Wideband Video Generator Adjustment Procedures Equipment Required The following table lists the equipment required to adjust the output offset and gain frame timing and clock timing and frequency response Table 6 1 Equipment required for AWVG7 Analog Wideband Video Generator adjustment pr
211. ontents The Access Procedure first directs you to the procedure s if any that required to access the module to be serviced then it directs you to the procedure to remove that module Table 1 4 Summary of procedures Procedure Module Page External Modules Line cord See page 1 15 Top cover Front panel unit Front panel assembly Internal Modules A 10 Main board See page 1 20 Power supply module Equipment required Most modules in this TG700 can be removed with a screwdriver handle mounted with a 2 Phillips tip Use this tool whenever procedure step instructs you to remove or install a screw unless a different size screwdriver is specified in that step All equipment required to remove and reinstall each module is listed in the first step of its procedure Table 1 5 Tools required for module removal Item No Name Description 1 Screwdriver handle Accepts Phillips driver bits 2 1 Phillips tip Phillips driver bit for 1 size screw heads 3 2 Phillips tip Phillips driver bit for 2 size screw heads 4 7 mm Nut Driver Socket or driver for 7 mm nuts TG700 TV Signal Generator Platform Service Manual 1 11 TG700 Mainframe Removal and Installation Procedures TG700 Orientation this manual procedures refer to front rear top etc of the TG700 The following figure shows how the sides are referenced Figure 1 2 TG700 orientation 1 12 TG700 TV Signal Generator
212. or Troubleshooting Troubleshooting Trees Power on the TG700 as follows 1 Connect the power cable to the instrument 2 Wait until the mainframe and the module completely initialize Check that no error messages appear on the display 3 Press the front panel MODULE button Is the AWVG7 main menu displayed Replace the module Perform the Functional Check procedures in the user manual Figure 6 8 Troubleshooting procedure 1 6 18 TG700 TV Signal Generator Platform Service Manual AWVG7 Analog Wideband Video Generator Troubleshooting Power off and remove the module then install it into a TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the TG700 mainframe Refer to Trouble operating correctly shooting in the 76700 TV Signal Generator Platform Service Manual Is the module AWVG7 module OK Replace the module Figure 6 9 Troubleshooting procedure 2 TG700 TV Signal Generator Platform Service Manual 6 19 AWVG7 Analog Wideband Video Generator Diagram AWVG7 Analog Wideband Video Generator Diagram The following figure shows the AWVG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the TG700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams
213. or information on where to return your instrument if it requires repair during the warranty period TG700 TV Signal Generator Platform Service Manual 3 11 AGL7 Analog Genlock Module Removal and Replacement AGL7 Analog Genlock Module Removal and Replacement Tools Required This section contains the instructions on how you can remove and replace the customer replaceable parts of the AGL7 Genlock module The following tools are required to perform the removal and replacement procedures Table 3 2 Required tools for removal and replacement of AGL7 Analog Genlock module Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the AGL7 module Replacing the Rear Panel Connectors and Chassis Replacing the Rear Panel Connectors It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Perform the following procedure to replace the rear panel connector 1 Use the Removing a Module section to remove the AGL7 Genlock module from the mainframe See page 1 41 Removing a Module 2 Disconnect the cables at OUT BLACK1 BNC CH2 OUT BLACK2 BNC CH3 OUT BLACK3 BNC RF R IN Rig
214. oubleshooting Power off and remove the module and then install it into the TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the TG700 mainframe Refer to Trouble operating correctly shooting in the 76700 TV Signal Generator Platform Service Manual Is the module BG7 module OK Replace the module Figure 7 6 Troubleshooting procedure 2 TG700 TV Signal Generator Platform Service Manual 7 13 BG7 Black Generator Diagram BG7 Black Generator Diagram The following figure shows the BG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the TG700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the BG7 Generator module is located in the Theory of Operation section See page 7 1 BG7 Black Generator Theory of Operation BG7 Generator module TG700 mainframe iN Tee Co o J830 10 Main board 3 Y or FD J880 Slot2 4 e 1930 o 1 1980 3 3 Rear panel lt connectors KD BLACK 3 010 4 I 3 N A10 Main board Figure 7 7 BG7 Generator module connections 7 14 TG700 TV Signal Generator Platform Service Manual BG
215. ounts from the Address Generator Generator Formatter Generator Formatter separates the generated video into two output signals Link A and Link B Link A Serializer Link A Serializer block transforms the selected 20 bit parallel video signal converted or generated to a serial digital signal and drives a 75 Q BNC output In addition CRC line numbers and payload packet are generated and inserted within this block TG700 TV Signal Generator Platform Service Manual 11 1 HDLG7 HD Dual Link Video Generator Theory of Operation Link B Serializer The Link B Serializer block transforms the selected 20 bit parallel video signal converted or generated to a serial digital signal and drives a 75 Q BNC output In addition CRC line numbers and payload packet are generated and inserted within this block TG700 Bus Main Board Interface HDSDI Input Deserializer Signal Processing Address Signal Generator Generator Engine LINK A Converter E Serializer Formatter Generator LINK B Formatter Serializer Figure 11 1 Simplified block diagram of the HDLG7 module TG700 TV Signal Generator Platform Service Manual Link A Upper Link A Lower Link B Upper Link B Lower HDLG7 HD Dual Link Video Generator Maintenance HDLG7 HD Dual Link Video Generator Maintenance This section contains instructions and procedures for maintaining the HDLG7 module Before following t
216. ow button to select Clock Timing and then press the ENTER button Move CH 1 probe from TP200 to TP202 Move Ch 2 probe from TP210 to TP212 Press the up or down V arrow button to select Clock 0 0 nsec and then the ENTER button Save the waveform on the oscilloscope in Refl Press the up A or down V arrow button to select 2 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right gt arrow button to adjust the delay value to 2 0 ns Save the waveform on the oscilloscope in and then press the up A down arrow button to select 10 0 ns TG700 TV Signal Generator Platform Service Manual 5 9 AVG7 Analog Video Generator Adjustment Procedures 24 25 26 27 Group Delay Adjustment Preparation While seeing the Delay Timing value on the oscilloscope press the left lt 4 or right gt arrow button to adjust the delay value to 8 0 ns Save the waveform on the oscilloscope in Refl and then press the up A or down arrow button to select 22 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right gt arrow button to adjust the delay value to 12 0 ns Press the CANCEL button to return to the CALIBRATION menu To perform the group delay adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable resistors an
217. preset as follows a Press the up A or down V arrow button to select RECALL b Press the left 4 or right gt arrow button to select Factory Default c Press the ENTER button to recall the factory default settings d Press the CANCEL button to return the TG700 main menu Select the 75 Color Bars signal as follows a Press the MODULE button to display the DVG7 main menu b Press the COLOR BAR test signal button until the 75 Color Bars signal is selected Turn on the Cursor HBars of the sampling oscilloscope and then set the nV to 800 mV Change the cursor mode to Track and then position the cursors so that they are symmetrical about the center graticule Locate variable resistor R507 on the DVG7 circuit board See Figure 8 2 Adjust R507 so that the signal amplitude is equal to the height between the two cursors set in step 6 TG700 TV Signal Generator Platform Service Manual 8 5 DVG7 Digital Video Generator Adjustment Procedures BLACK output level adjustment Option BK only 7 Move the BNC cable from the SIGNAL 1 connector to the BLACK 1 connector and move the 75 terminator from the SIGNAL 2 connector to the BLACK 2 connector on the DVG7 Generator module 8 Select the 40 Flat Field signal as follows a Pressthe CANCEL button to return the module main menu b Press the up A or down V arrow button to select BLACK OPTION c Press the ENTER button to access the BLACK submenu d Press
218. r 011 0102 03 BNC T connector 1 Tektronix part number 103 0030 00 BNC female to dual banana 1 Tektronix part number 103 0090 00 adapter HD3G7 Module Adjustment Procedure There is only one adjustment for the HD3G7 module Perform this adjustment if the module fails the SDI Output Amplitude portion of the Performance Verification procedure This procedure replicates part of the Performance Verification Before adjusting the SDI Output Amplitude you must first characterize the Reference to the DMM and then characterize the test system Characterization Characterize the reference to the DMM 1 Connect the equipment as follows a Connect the 1 m high bandwidth cable to the AFG3101 output and connect the BNC T to the other end b Connect the 75 precision terminator to the other end of the BNC T and connect the banana plug adapter to the side c Connect the banana plug adapter to the DMM 2 Set the AFG3101 for an 800 mV 10 kHz sine wave into a 75 load 3 Check that the AFG3101 output is On 4 Set the DMM to measure Volts with a medium filter and set the range to display four digits 5 Record the DMM AC Voltage reading in the SDI Output Amplitude table See Table 10 2 TG700 TV Signal Generator Platform Service Manual 10 5 HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures Table 10 2 SDI output amplitude Characterization DMM Measurement typically 0 2880 V Oscilloscope Cycle RMS
219. rams contains a block diagram using individual modules as blocks and an interconnect diagram showing connections between the modules Replaceable Parts List lists all field replaceable modules by part number Before servicing this product read the Safety Summary and Introduction at the front of the manual and the ESD information below CAUTION Static discharge can damage any semiconductor component in the TG700 When performing any service which requires internal access to the TG700 adhere to the following precautions to avoid damaging internal modules and their components due to electrostatic discharge ESD TG700 TV Signal Generator Platform Service Manual 1 5 TG700 Mainframe Maintenance 1 Minimize handling of static sensitive modules 2 Transport and store static sensitive modules in their static protected containers or on a metal rail Label any package that contains static sensitive modules 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Do service of static sensitive modules only at a static free work station 4 Nothing capable of generating or holding a static charge should be allowed on the work station surface 5 Handle circuit boards by the edges when possible 6 Do not slide the modules over any surface 7 Avoid handling modules in areas that have a floor or work surface covering capable of generating a static charge Inspecti
220. ration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES W2 15AUG04 Table of Contents Genera Safety Summary Ji estt e toa eed e dt dod dee E de uns xii Service Safety aso Ed unen eds lur XV Stricture XV Manual de o RR RA IR RI QI A DR ERA de ee us T Pi E EN e Pis XV Finding Other 22 2222 eme he sese xvi renuit E EEEE A ER Performance Check Interval tr E Dessus eR een xvil Strategy fOr ServiCM Gs ER xvii Tektromx Service Offerings terrier E Ee
221. ress the ENTER button to save the current instrument settings to the new preset After the problem is solved recall the preset you created TG700 TV Signal Generator Platform Service Manual Troubleshooting Trees HDLG7 HD Dual Link Video Generator Troubleshooting Power on the TG700 as follows 1 Connect the power cable to the instrument 2 Wait until the mainframe and the module completely initialize Check that no error messages appear on the display 3 Press the front panel MODULE button Is the HDLG7 main menu displayed Replace the module Perform the Functional Check procedures in the user manual Figure 11 2 Troubleshooting procedure 1 TG700 TV Signal Generator Platform Service Manual 11 7 HDLG7 HD Dual Link Video Generator Troubleshooting Power off and remove the module then install it into TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the mole TG700 mainframe Refer to Trouble operating correctly shooting in the TG700 TV Signal Generator Platform Service Manual HDLG7 module OK Replace the module Figure 11 3 Troubleshooting procedure 2 11 8 TG700 TV Signal Generator Platform Service Manual HDLG7 HD Dual Link Video Generator Diagram HDLG7 HD Dual Link Video Generator Diagram Rear panel 4 connectors LINK A upper LINK A lower LINK B upper LINK B lower HD S
222. revent additional problems NOTE Contact your local Tektronix representative for information on where to return your instrument if it requires repair during the warranty period TG700 TV Signal Generator Platform Service Manual 5 21 AVG7 Analog Video Generator Removal and Replacement AVG7 Analog Video Generator Removal and Replacement This section contains the instructions on how you can remove and replace the customer replaceable parts of the AVG7 Generator module Tools Required The following tools are required to perform the removal and replacement procedures Table 5 2 Required tools for removal and replacement of AVG7 Analog Video Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 14 mm Special nut driver for removing the BNC 003 A041 00 connectors of the AVG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to replace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Usethe Removing a Module section to remove the AVG7 Generator module from the mainframe See page 1 41 Removing a Module 2 Disconnect the cables
223. right arrow button to select OmV and then press the ENTER button 24 Locate variable resistor R757A on the AWVG7 circuit board See Figure 6 2 25 Adjust R757A so that the output offset is 0 V 1 mV 26 Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AWVG7 Generator module 27 Locate variable resistor R657A on the AWVG7 circuit board See Figure 6 2 28 Adjust R657A so that the output offset is 0 V 1 mV Frame Timing and Clock Timing Adjustments NOTE Instruments serial numbered B010600 or above do not require this adjustment Preparation perform the frame timing and clock timing adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the test points on AWVG7 circuit board See Figure 6 4 TG700 TV Signal Generator Platform Service Manual 6 7 AWVG7 Analog Wideband Video Generator Adjustment Procedures TP200 TP210 7 UUUI gt
224. rm Service Manual 9 19 GPS7 Module Maintenance Table 9 6 Power supply test points Test point Supply name Limits Notes Mainframe supplies TP111 M 5VD 4 75 V to 45 25 V Mainframe Fused 5 V digital supply fuse F132 TP211 M 3 3V 3 1 V to 3 5 V Mainframe Fused 3 3 V digital supply fuse F131 TP213 M 5VA 4 5V to 5 25 V Mainframe Fused 5 V analog supply fuse F111 TP214 M 5VA 4 75 V to 5 25V Mainframe Fused 5 V analog supply fuse F121 TP215 M 8V 7 6 V to 84 V Mainframe Fused 8 V analog supply fuse F122 Derived supplies TP311 ANT 5V 0 to 5 8 V Switched GPS antenna supply user setup TP411 RAMP 7V 6 75 V to 7 25 V Derived from M 8V TP511 RAMP 4V 4 25 V to 3 75 V Derived from M 5V TP711 CIR 2 5V 2 375 V to 2 625 V Derived from M 3 3V TP911 VID 4 1 4 08 V to 4 11 V Derived from M 5VA TP821 LTC 3 3V 3 30 V to 3 39 V Derived from M 5VA TP0821 BB 1 2V 1 15 V to 1 25 V Derived from M 3 3V TP0421 DO 1 2V 1 15 V to 1 25 V Derived from M 3 3V test point is under Trimble GPS receiver board 9 20 TG700 TV Signal Generator Platform Service Manual GPS7 Module Maintenance 4 TP821 TP0821 TP0421 TP212 GND F122 F131 F111 F132 Figure 9 4 GPS7 voltage test point and fuse locations TG700 TV Signal Generator Platform Service Manual 9 21 GPS7 Module Maintenance Oven oscillator frequency adjus
225. rm the removal and replacement procedures Table 2 1 Required tools for removal and replacement of AG7 Audio Generator Tektronix part Name Description number Screwdriver handle Accepts Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads 2 Phillips tip Phillips driver bit for 2 size screw heads Nut driver 11 mm Special nut driver for removing the BNC 003 A042 00 connectors of the AG7 module Replacing the Rear Panel Connectors and Chassis It is usually not necessary to repl ace the rear panel connectors or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Use the Removing a Module section to remove the AG7 Generator module from the mainframe See page 1 41 Removing a Module 2 Disconnect these cables cable from J400 at 14 cable from J410 at 34 cable from J420 at 54 7 cable from J430 at 74 2 connector 4 connector 6 connector 8 connector cable from J440 at SILENCE connector The cable from J450 at 48 kHz CLOCK connector 3 Use a screwdriver with a 2 Phillips tip to remove the four screws securing the AG7 circuit board to the chassis TG700 TV Signal Generator Platform Service Manual 2 3 AG7 Audio Generator Removal and Replacement 2 4 Replacing the Ch
226. rrow button to select Clock 0 0 nsec and then the ENTER button Save the waveform on the oscilloscope in Refl Press the up A or down V arrow button to select 2 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right gt arrow button to adjust the delay value to 2 0 ns Save the waveform on the oscilloscope in and then press the up A down arrow button to select 10 0 ns While seeing the Delay Timing value on the oscilloscope press the left 4 or right arrow button to adjust the delay value to 8 0 ns TG700 TV Signal Generator Platform Service Manual 6 59 AWVG7 Analog Wideband Video Generator Adjustment Procedures 25 Save the waveform on the oscilloscope in Refl and then press the up or down arrow button to select 22 0 ns 26 While seeing the Delay Timing value on the oscilloscope press the left or right gt arrow button to adjust the delay value to 12 0 ns 27 Press the CANCEL button to return to the CALIBRATION menu Frequency Response Adjustment Preparation To perform the frequency response adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the variable capacitors on the AWVG7 circuit board See Figure 6 5 C804B 0000
227. rst with Field REF appears and then press the ENTER button Press the CANCEL button twice to exit the menu Press the up arrow button until DIAGNOSTICS appears and then press the ENTER button Press the right arrow button until ADC BUS appears Check for the following conditions bits in the Stuck field show or an L then the bit is not moving Replace the GPS7 module bits in the Short field show an S then there is a short between some of the bits Replace the GPS7 module Loop output reference test Perform this procedure to view the reference input data looped out to the BLACK 2 connector This can help determine correct functionality of the input circuitry or problems in the input signal NOTE The loop output reference test is only available on GPS7 modules with the REF IN connector on the rear panel At the same time press the MODULE FORMAT and FRONT PANEL ENABLE buttons briefly then continue to hold the FRONT PANEL ENABLE button until TG700 Start up with factory mode shows on the display Connect Black 1 of the reference unit to the Black 1 of the GPS7 module Connect the Black 2 of the GPS7 module to the composite input of the WRM7120 waveform monitor Terminate the loop output on the WFM7120 Configure the Reference Source of the GPS7 module to be NTSC Burst a Press the MODULE button until GPS7 appears b Use the up A or down V arrow button to select REFERENCE c
228. s Table 9 7 GPS7 module replaceable parts Abbreviations conform to American National Standard ANSI Y1 1 1972 Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 9 5 1 352 1117 00 1 LIGHT PIPE SET 1 BD CONN 1 LIGHT PIPE 1 LENS 2 174 5509 00 1 CABLE FEMALE SMB FEMALE BNC 8 0IN 3 214 3903 00 2 VENDOR LYNTRON SCREW JACK 4 40 X 0 312 LONG 0 188 HEX HEAD STAND OFF 4 40 INT THD X 0 312 THD EXT 4 40 STEEL SN PLATED 4 214 4946 01 2 SPRING CONICAL VXI MOUNTING SCREW 0 26 SUS304 5 4 MML 5 213 1129 01 2 SCREW MACHINE M2 5 X 11MM L PAN HD STL NI PL CROSS amp SLOTTED 6 210 1039 00 3 WASHER LOCK 0 521 ID INT 0 025 STEEL ZINC FINISH 7 220 0497 00 3 NUT PLAIN HEX 5 28 X 562 HEX BRS NI NICKEL PLATED 8 333 4575 00 010100 019999 1 PANEL REAR WITHOUT TIMECODE AND SAFETY CONTROLLED 333 4575 01 B020000 1 PANEL REAR WITH TIMECODE AND GENLOCK SAFETY CONTROLLED C020000 9 441 2544 00 1 CHASSIS MODULE 10 211 0408 00 8 SCR ASSY WSHR 4 40 X 0 250 PNH STEEL ZINC FINISH T 10 TORX DR SEMS 11 116 1144 00 010100 019999 1 MODULE ASSEMBLY GPS7 WITHOUT TIMECODE AND GENLOCK 116 1157 00 B020000 1 MODULE ASSEMBLY GPS7 WITH TIMECODE AND GENLOCK C020000 12 174 5521 00 CABLE 2X4 2MM PITCH FEMALE TO FEMALE SQUARE PINS 13 119 7518 00 MODULE GPS TIMING 1PPS 15NS
229. s or chassis However if a connector or chassis becomes damaged you can replace it Replacing the Rear Panel Perform the following procedure to replace the rear panel connector Connectors 1 Use the Removing a Module section to remove the HDLG7 module from the mainframe See page 1 41 Removing a Module 2 Disconnect the cables at J911 upper LINK A J912 lower LINK A J922 upper LINK B J921 lower LINK B and J711 HD SDI IN on the HDLG7 circuit board 3 Use the 14 mm nut driver to remove the nut securing the damaged connector to the chassis Pull the connector away 4 Perform steps 2 and 3 in reverse order to replace the connector 11 4 TG700 TV Signal Generator Platform Service Manual HDLG7 HD Dual Link Video Generator Removal Replacement Replacing the Chassis Perform the following procedure to replace the chassis 1 Use the 14 mm nut driver to remove the nuts from each of the rear panel connectors Use a screwdriver with a 2 Phillips tip to remove the six screws securing the circuit board to the chassis Lift the circuit board up and away from chassis and then place it on a static free surface Set the replacement chassis on a firm flat static free work surface Carefully place the circuit board in place on the chassis Use a screwdriver with a 2 Phillips tip to install the six screws securing the circuit board to the chassis Apply the rear panel to the chassis and then install all
230. s only to be performed by trained service technicians Warm Up Period AVG7 Generator module requires 20 minute warm up time in a 20 C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance WARNING avoid potential shock which could cause injury or death use caution when removing the TG700 mainframe top cover with power connected Access When adjusting the AVG7 Generator module remove the top cover of the TG700 mainframe See page 1 15 Top Cover NOTE If the serial number of your instrument is B010600 and above replace the resistor and capacitor numbers in the figures and procedures as follows R xxx 1 for example R651A R651A 1 R7xxx 2 for example R751A R651A 2 R8xxx 3 for example R851A R651A 3 C xxx R xxx 1 for example C604B C604B 1 C7xxx R xxx 2 for example C704B 604 2 8 3 for example C804B C604B 3 TG700 TV Signal Generator Platform Service Manual 5 3 AVG7 Analog Video Generator Adjustment Procedures Equipment Required The following table lists the equipment required to adjust the output offset and gain frame timing and clock timing group delay frequency response and interchannel delay Table 5 1 Equipment required AVG7 Analog Video Generator adjustment procedures
231. sed Digital Multimeter Used to check power supply voltages and Fluke 87 or equivalent fuses 75 BNC cables 4 Length 42 inches used to connect the Tektronix part number 012 0074 00 instruments ROHS compliant ESD safe soldering workstation The GPS7 boards do not contain any user serviceable parts but any soldering must be ROHS compliant Frequency Counter optional Used for an alternate method to check Fluke PM6685 or equivalent frequency accuracy Problem Identification If there is a problem first perform the GPS7 Performance Verification procedure found in the 7G700 TV Signal Generator Platform Specifications and Performance Verification manual available on the Web at www tektronix com manuals Any problems found with that procedure can be a starting point for troubleshooting General problems and actions to follow are shown in the following table See Table 9 4 TG700 TV Signal Generator Platform Service Manual 9 13 GPS7 Module Maintenance Table 9 4 GPS7 module troubleshooting Problem Actions Fails Power On Self Test POST GPS7 does not appear in menu Verify the GPS7 module is installed in slot 1 of the mainframe Run power on test procedure See page 9 16 Power on self test Check for current software See page 9 16 Check installed software Run power supply test See page 9 19 Power supply test Swap the module with a known good GPS7 module and try
232. signal amplitudes sess ee 5 16 Location of the variable capacitors for the interchannel delay adjustment 5 17 Equipment connection for adjusting the interchannel 5 18 Troubleshooting procedure 1 sss mme mene 5 25 Troubleshooting procedure 2 22 meme 5 26 AVG7 Generator module connections 1 4000777042 5 27 AVG7 Generator module exploded 2 0 00 5 29 Simplified block diagram of the AWVG7 Generator module 6 2 Location of the variable resistors for the output offset and gain adjustment 6 5 Equipment connection for adjusting the output offset and 6 5 Location of the test points for the frame timing and clock timing adjustment 6 8 Location of the variable capacitors for the frequency response adjustment 6 10 Equipment connection for adjusting the frequency 6 11 Minimizing the amplitude 2 6 13 Troubleshooting procedure 1 2 2 222 2 eme eme emen 6 18 Troubleshooting procedure 2 2 6 19 AWVG7 Generator module connections 2 6 20 AWVG7 Generator module exploded view
233. ss Overlay SIGNAL 1 lt Interface Generator Controller Formatter Serializer gt SIGNAL 2 Overlay Memory Black Formatter BLACK 1 Generator Serializer BLACK 2 Option BK only Figure 12 1 Simplified block diagram of the HDVG7 Generator module 12 2 TG700 TV Signal Generator Platform Service Manual HDVG7 HDTV Digital Video Generator Adjustment Procedures HDVG7 HDTV Digital Video Generator Adjustment Procedures The only adjustment in the HDVG7 Generator module is for the output level Requirements for Adjustment Personnel Warm Up Period Access Equipment Required Before doing the adjustment note the following requirements This procedure is only to be performed by trained service technicians The HDVG7 Generator module requires a 20 minute warm up time in a 20 C to 30 C environment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance When adjusting the output level you need to remove the top cover of the TG700 mainframe See page 1 15 Top Cover The following table lists the equipment required to adjust the output level Table 12 1 Equipment required for HDVG7 HDTV Digital Video Generator adjustment procedures Item No Minimum requirement Recommended equipment TV signal generator platform Tektronix TG700 Sampling Oscilloscope Bandwidth 6 GHz or higher Tektronix DSA8200 Length 42
234. t of the replaceable modules for the HDVG7 Generator module Use this list to identify and order replacement parts Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Table 12 4 HDVG7 HDTV Digital Video Generator replaceable parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 12 7 116 007 05 1 EXCHANGE MODULE HDVG7 116 A008 05 1 EXCHANGE MODULE HDVG7 BK 12 7 1 441 A275 00 1 CHASSIS MODULE HDVG7 ASSY 2 333 A409 00 1 PANEL REAR HDVG7 AL 333 A410 00 1 PANEL REAR HDVG7 OPTION AL 3 214 4946 00 2 SPRING CONICAL VXI MOUNTING SCREW 0 26MM 4 213 1129 01 2 SCREW MACHINE M2 5X11MM L PAN HD STL NI PL CROSS amp SLOTTED 5 348 A128 00 Eu SHLD GASKET ELEK FINGER TYPE 5 1MM LX6 4MM W BE CU 97 645 02 6 174 B846 00 2 CABLE ASSY RF 750HM COAX RG179 6CM L BNC TO PL71 LP 1 5C 174 B846 00 4 ASSY RF 750HM COAX RG179 6CM L BNC TO PL71 LP 1 5C OPTION 7 211 245 01 6 SCREW MACHINE M3X6MM L PNH STL NI 5 REC W KOGATAMARU amp LOCK WASHER 8 334 1378 03 MARKER IDENT MKD SERIAL NO 9 342 A146 00 INSULATOR PLATE HEAT CONDUCTOR RUBBER 20MMX20MMX10MM THK TC1000 TCK 342 A146 00 2 INSULATOR PLATE HEAT CONDUCTOR RUBBER 20MMX20MMX10MM THK TC1000 TCK STANDARD ACCESSORIES 075 0986 XX 1 MANUAL TECH MODULE INSTALLATION INSTRUCTIONS 063 3939 XX 1 KIT SOFTWARE LIBRARY DOCUMENTAT
235. te the expected direct value 77 record this value in SDI Output Amplitude table See Table 10 2 Record the average value which is indicated by the letter u in the Measured direct u row Before Adjustment column of the SDI Output Amplitude table See Table 10 2 TG700 TV Signal Generator Platform Service Manual 13 14 15 16 17 18 19 20 21 22 23 24 25 HD3G7 HD 3 Gb s SDI Video Generator Adjustment Procedures Multiply by the attenuation factor obtained at the end of system characterization and enter the result in the Calculated corrected value row Before Adjustment column of the SDI Output Amplitude table See Table 10 2 Press the TG700 up or down V arrow button and then press the Enter button to activate the adjustment mode Press the Clear Data button on the oscilloscope and wait about 5 seconds before proceeding to the next step Press the TG700 up or down arrow button to change the amplitude to the expected average value calculated in step 11 Repeat steps 15 and 16 until the average direct value u is within 1 mV of the corrected direct value and then press the TG700 Enter button to save the new amplitude calibration value and exit the Channel 1 Adjustment mode Record the new measured direct value in the After Adjustment column of the SDI Output Amplitude table See Table 10 2 Calculate the corrected value
236. the output boards TG700 TV Signal Generator Platform Service Manual 10 1 HD3G7 HD 3 Gb s SDI Video Generator Theory of Operation Converter Mode Clocks and Frames Generator Mode Converter Mode In converter mode the FPGA de serializes and de scrambles the 1 5 GHz input signal Each active line from the input is used twice to double the data rate for the output The lines are multiplexed into the output according to the level A or B protocol and then scrambled and serialized In generator mode the mainframe provides three frame pulse signals The actual frame signal used is the appropriate one for the rate of the signal being generated The selected input frame resets the counters in the FPGA establishing the correct video timing These frames are not used in converter mode as the converter output is always a slightly delayed version of the input signal The mainframe also provides a 54 MHz clock for generator mode This 54 MHz clock drives a DDS in the FPGA to create a digitized sine wave which is then applied to the flexible generator clock circuit Depending on the output format the flexible clock output is at either 148 5 MHz or 148 35 MHz This clock is fed back to the FPGA to drive the generator core functions and sent to the FPGA serializer clock inputs and the trigger output multiplexer The 54 MHz input clock also registers the input frame pulse After it is registered at 54 MHz it needs to cross to the 148 5 MHz doma
237. the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual 11 5 HDLG7 HD Dual Link Video Generator Troubleshooting HDLG7 HD Dual Link Video Generator Troubleshooting Equipment Required This section contains instructions and procedures for troubleshooting the HDLG7 module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the 7G700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed in the following table is required for troubleshooting Table 11 2 Equipment required for HDLG7 HD Dual Link Video Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the troubleshooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up A or down arrow button to select SAVE 4 Press the left lt 4 or right f arrow button to select a preset number to save instrument settings 5 P
238. til the 75 Color Bars signal is selected 6 Turnon the Cursor HBars of the sampling oscilloscope and then set the nV to 159 6 mV 7 Change the cursor mode to Track and then position the cursors so that they are symmetrical about the center graticule 8 Locate variable resistor R530 on the HDVG7 circuit board See Figure 12 3 9 Adjust the R530 so that the signal amplitude is equal to the height between the two cursors set in step 6 TG700 TV Signal Generator Platform Service Manual 12 5 HDVG7 HDTV Digital Video Generator Adjustment Procedures BLACK Output Level Adjustment Option BK Only 1 Move the BNC cable connection from the SIGNAL 1 connector to the BLACK 1 connector and move the 75 terminator from the SIGNAL 2 connector to the BLACK 2 connector on the HDVG7 Generator module 2 Select the 40 Flat Field signal as follows a Pressthe CANCEL button to return the module main menu b Press the up A or down V arrow button to select BLACK OPTION c Press the ENTER button to access the BLACK submenu d Press the up A or down arrow button to select SIGNAL e Press the left lt 4 or right gt arrow button to select 40 Flat Field and press the ENTER button 3 Locate the variable resistor R630 on the HDVG7 circuit board See Figure 12 3 4 Adjust the R630 so that the signal amplitude is equal to the height between the two cursors set in step 6 This completes the output level adjust
239. tment The oven oscillator frequency adjustment saves the current tune voltage for the oven This will be used when the instrument is in internal mode If the instrument is locked to a GPS signal this should be done periodically to account for crystal drift This adjustment can be done without any disruption to operation and is best done in the instrument s operating environment This adjustment can be done without putting the instrument into Factory Mode so the instrument does not have to be taken out of service 1 Allow the instrument to warm up for a minimum of 20 minutes with a GPS signal connected Verify that the instrument is locked to the GPS signal Make sure the instrument is in Fine mode Navigate to TG700 Utilities Oven frequency Calibration Press the ENTER button to save the current oven tune value SA Nt 2 595 559 Note the value displayed Normally this value will be in the range of 12 000 to 14 000 If it is 6 000 or 720 000 then the oven is near the end of it s tune range and the main board should be replaced Gain calibration Perform a Gain calibration as shown in the Adjustment Procedures to characterize the oscillator frequency as a function of voltage This adjustment needs to be performed in factory mode and is only needed once to characterize the oscillator See page 9 8 Gain calibration Acquire new position The GPS7 module must have a valid 3D GPS position to properly lock to GPS time If
240. to the chassis and then install all the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual 3 13 AGL7 Analog Genlock Module Troubleshooting AGL7 Analog Genlock Module Troubleshooting Equipment Required This section contains instructions and procedures for troubleshooting the AGL7 Genlock module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the TG700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting The equipment listed in the following table is required for troubleshooting Table 3 3 Equipment required for AGL7 Analog Genlock module troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the troubleshooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up A or down V arrow button to select SAVE 4 Press the left lt 4 or right f arrow button to select a preset number to save instrument
241. to the connectors on the left and right sides of the module 3 Use screwdriver with a 1 Phillips tip to loosen the two screws securing the module to the mainframe CAUTION Be careful not to damage the parts and cables inside of the module when you remove the module from the mainframe 4 Pull the module slowly toward you while supporting the terminations or BNC cables attached to the connectors TG700 TV Signal Generator Platform Service Manual 1 41 Removing a Module 1 42 TG700 TV Signal Generator Platform Service Manual Audio Generator AG7 Audio Generator Theory of Operation This section describes the basic operation of the major circuit blocks in the AG7 Generator module Bus Interface This block provides the communication between the mainframe and the module circuit Audio This block contains 20 24 bits audio data for all of the serial audio outputs Audio Data Controller and block is a part of the FPGA It receives audio data from the Audio Memory 48 kHz Decoder and encodes these data to serial audio data stream that comply with the AES EBU standard It also generates 48 kHz clock signal Channel Buffers 1 2 3 4 These blocks receive the digital audio data from the FPGA and set the output 5 6 7 8 and Silence amplitude to the specified level 48 kHz Clock Buffer block outputs 48 kHz clock signal The output level of the clock signal can be set to either a CMOS compatible
242. tor Adjustment Procedures 757 R851B R856A R851A R756A 2 3 5 BER 3 N R751B R657A R651B R651A R656A R751A Figure 5 2 Location of the variable resistors for the output offset and gain adjustment Procedure WARNING To avoid serious injury do not touch exposed connectors or components when operating the TG700 mainframe with the top cover removed Dangerous potentials exist at several points within the TG700 mainframe 700 mainframe rear panel Use the 75 BNC cable BNC connector 75 coaxial termination and BNC female to dual banana adapter to connect the upper CH 1 connector on the AVG7 Generator module to the INPUT connector on the digital multimeter See Figure 5 3 75 O BNC cable Digital multimeter BNC T connector m 9 9 AVG7 module BN
243. two that need manual verification 1 Remove the TG700 top cover See page 1 15 Cover 2 Check the 5 V supply by measuring the voltage at F121 which should be in the range of 4 75 V to 5 25 V See Figure 10 3 This fuse is located under one of the mainframe support bars and is difficult to access 3 Check the 43 3 V supply by measuring the voltage at F122 which should be in the range of 43 135 V to 43 465 V See Figure 10 3 This fuse is located under one of the mainframe support bars and is difficult to access Make sure that the voltage is present on both ends of the fuse If the voltage is present on only one end of the fuse the module must be replaced If the voltage 18 not present on either end of the fuse check the mainframe power and the connector between the module and the mainframe If they are okay the mainframe must be repaired F122 33 V Figure 10 3 HD3G7 power supply test points Check multiple frame rates The mainframe provides three frame pulses which are used to set the module timing relative to the rest of the instrument Different frame pulses are used depending on the signal format the instrument is set for Use this procedure to investigate problems in that circuitry TG700 TV Signal Generator Pl
244. uit board view 2 eee eee 12 4 Figure 12 3 Equipment connection for adjusting the output 12 5 Figure 12 4 Troubleshooting procedure 1 2 12 11 Figure 12 5 Troubleshooting procedure 2 2 emen 12 12 Figure 12 6 HDVG7 Generator module connections esses e 12 13 Figure 12 7 HDVG7 Generator module exploded view 2 22 2 12 15 TG700 TV Signal Generator Platform Service Manual ix Table of Contents List of Tables Table 1 1 Equipment required for TG700 adjustment procedures 2 1 3 Table 1 2 External inspection checklist lesse me enn 1 7 Table 1 3 Internal inspection 84 2 22 1 8 Table 1 4 Summary 2 mese esee 1 11 Table 1 5 Tools required for module 1 2 2 2 ene e es 1 11 Table 1 6 Parts list column descriptions 22 22 menm 1 32 Table 1 7 Main chassis replaceable parts 2 1 33 Table 1 8 Main frame replaceable parts 1 34 Table 1 9 Front panel unit replaceable parts 0 4 1 36 Table 1 10 Power supply module replaceable parts
245. ules procedure Check diagnostics reported values Run Test Multiple Frame Rate procedure Converter Mode Unstable video Excessive jitter Check diagnostics reported values Run converter mode test procedure Generator output lost when format is changed Run Test Multiple Frame Rate procedure If no other problem found replace the HD3G7 module TG700 TV Signal Generator Platform Service Manual 10 15 HD3G7 HD 3 Gb s SDI Video Generator Maintenance Procedures Power on self test When you first apply power to a TG700 it runs a Power On Self Test POST If an error is encountered during this POST the display will show one of several error codes See Table 10 6 Watch the display during boot up and note any error codes Error codes may appear for as short a time as three seconds Table 10 6 POST error codes Error code Meaning Action 1 No input board in slot 0 The input module is not detected Replace the Input module by the processor 2 No output board in slot 2 The output module is not detected Replace the Output module by the processor 3 PLD keyword OxAAAA The processor did not read the These errors indicate a failure of basic correct code interfacing to the module communications between the mainframe processor PLD keyword 0x5555 The processor did not read the and the PLD on the module If possible try the correct code interfacing to the
246. utton to select Memory and then press the ENTER button Is the message Fail DVG7 Diag error displayed Replace the module Perform the Functional Check procedures in the user manual Figure 8 4 Troubleshooting procedure 1 TG700 TV Signal Generator Platform Service Manual 8 11 DVG7 Digital Video Generator Troubleshooting Power off and remove the module and then install it into the TG700 mainframe that is functioning correctly Is the module operating correctly The problem is probably in the S STIR TG700 mainframe Refer to Trouble operating correctly shooting in 76700 TV Signal Generator Platform Service Manual DVG7 module OK Replace the module Figure 8 5 Troubleshooting procedure 2 8 12 TG700 TV Signal Generator Platform Service Manual DVG7 Digital Video Generator Diagram DVG7 Digital Video Generator Diagram The following figure shows the DVG7 Generator module and how it interconnects with the TG700 TV Signal Generator Platform Diagrams showing mainframe component interconnections such as power supply and oscillator can be found in the 7G700 Diagram section of this manual See page 1 28 TG700 Mainframe Diagrams A block diagram of the DVG7 Generator module is located in the DVG7 Theory of Operation section See page 8 1 DVG7 Generator module TG700 mainframe A10 SIGNAL 1 1 Main board 9 p 6 H Slot 2 4
247. ved from the chassis Reassembly Reassembly is more complex than disassembly and must be done in a specific order to prevent damage to the HD3G7 module These procedures will start as if the instrument has been completely disassembled You may start at an appropriate step and proceed to the end Installing a new heat sink Follow this procedure to install a new heat sink You will need a new gap pad as well as the heat sink TG700 TV Signal Generator Platform Service Manual 10 11 HD3G7 HD 3 Gb s SDI Video Generator Maintenance 1 Place the heat sink on the work surface as shown with the bosses up Peel the protective film off of one side of the gap pad and adhere the gap pad to the top of the heat sink Peel the protective film off of the top side of the gap pad Position the HD3G7 Main circuit board over the heat sink and gap pad aligning the holes in the circuit board on each side of the FPGA with the threaded bosses of the heat sink Press the circuit board down slightly to adhere the gap pad to the circuit board Loosely install two of the T10 TORX screws through the circuit board and into the heat sink CAUTION prevent damage to the FPGA do not tighten these screws at this time Replace the circuit board into the chassis Follow this procedure to reinstall the circuit board assembly into the chassis 1 Install the SDI Input circuit board 878 0199 xx into J910 of the Main circuit board an
248. wdriver with a 2 Phillips tip items 1 and 3 Locate the module to be removed in the locator diagram External modules See Figure 1 3 2 Orient instrument Set the TG700 so its bottom is down on the work surface and its front is facing you 3 Remove front panel unit See Figure 1 6 a Use a screwdriver with a 2 Phillips tip to remove the three screws securing the front panel unit to the top of the chassis Set the TG700 so its top is down on the work surface and its front is facing you Use a screwdriver with a 2 Phillips tip to remove the four screws securing the front panel unit to the bottom of the chassis Set the TG700 so its bottom is down on the work surface and its front is facing you Unplug the cables at J710 J720 and J725 on the A10 Main board Grasp the front panel unit and pull it forward 4 Reinstallation Perform step 3 in reverse order to reinstall the front panel unit TG700 TV Signal Generator Platform Service Manual 1 17 TG700 Mainframe Removal and Installation Procedures To J725 on the A10 Main board To J720 on the A10 Main board To J710 on the A10 Main board Figure 1 6 Front panel unit removal Front Panel Assembly 1 Assemble equipment and locate modules to be removed a You need a screwdriver with a 2 Phillips tip items 1 and 3 b Locate the module to be removed in the locator diagram External modules See Figure 1 3 2 Remove the Front Cover S
249. wdriver with a 22 Phillips tip to install the five screws securing the circuit board to the chassis Apply the rear panel to the chassis and then install all the rear panel connectors to the chassis TG700 TV Signal Generator Platform Service Manual BG7 Black Generator Troubleshooting BG7 Black Generator Troubleshooting This section contains instructions and procedures for troubleshooting the BG7 Generator module These procedures will help you decide whether it is necessary to replace your module If the TG700 mainframe does not boot up or if the display is not working refer to the TG700 Mainframe Troubleshooting section in this manual See page 1 24 TG700 Mainframe Troubleshooting Equipment Required The equipment listed in the following table is required for troubleshooting Table 7 3 Equipment required for BG7 Black Generator troubleshooting Equipment description Minimum requirements example Screwdriver handle Accept Phillips driver bits 1 Phillips tip Phillips driver bit for 1 size screw heads TG700 mainframe A TG700 mainframe that is functioning correctly Backing Up the Instrument Settings Before you begin the trouble shooting procedures create a preset to save your instrument settings as follows 1 Press the MODULE button until the mainframe main menu TG700 PRESET appears 2 Press the ENTER button to access the PRESET submenu 3 Press the up or down V arrow button to select SAV
250. y the CALIBRATION menu b Press the left lt 4 or right gt arrow button to select DAC Gain YPbPr and then press the ENTER button c Press the left amp or right arrow button to select OmV and then press the ENTER button 24 Locate variable resistor R757A on the AVG7 circuit board See Figure 5 2 25 Adjust R757A so that the output offset is 0 V 1 mV 26 Move the BNC cable from the upper CH 2 connector to the upper CH 3 connector on the AVG7 Generator module 27 Locate variable resistor R657A on the AVG7 circuit board See Figure 5 2 28 Adjust R657A so that the output offset is 0 V 1 mV Frame Timing and Clock Timing Adjustments NOTE The instrument with serial number B010600 and above does not require this adjustments Preparation To perform the frame timing and clock timing adjustment you must first remove the top cover of the TG700 mainframe See page 1 15 Top Cover After you have removed the top cover find the test points on the AVG7 circuit board See Figure 5 4 TG700 TV Signal Generator Platform Service Manual 5 7 AVG7 Analog Video Generator Adjustment Procedures TP200 TP210 i LET Ho gt i TE diia io DLJ
251. yne Separator Black generation engine Black generation engine Time code Reader TG 00 Mainframe Figure 9 1 Simplified block diagram of the GPS7 module 0230 001 NOTE The timecode reader and genlock circuitry is only available on GPS7 modules with the REF IN connector on the rear panel TG700 TV Signal Generator Platform Service Manual 9 3 GPS7 Adjustment Procedures GPS7 Adjustment Procedures The GPS7 module has several adjustments associated with it both to the module Black Burst Amplitude and Black Burst Offset and to the mainframe oscillator Requirements for Adjustment Personnel Warm Up Period Equipment Required Before doing the adjustment note the following requirements This procedure is only to be performed by trained service technicians The GPS7 Generator module requires a 20 minute warm up time in a 20 C to 30 C environment before it is adjusted An external antenna or GPS signal must be connected during the warm up time Adjustments done before the operating temperature has stabilized may cause errors in performance The following table lists the equipment required to perform the adjustments needed for this module Table 9 1 Equipment required for GPS7 module adjustment procedures Item No Minimum requirement Recommended equipment TV signal generator platform 1 Tektronix TG700 Dig

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