346B Synthesized Calibrator User Manual
Contents
1. 13 14 15 16 17 18 19 Select segment 2 by performing the following keystroke sequence Observe DC mode DC units 00000 0 Hz 9999 mV Connect the DC voltmeter to the MILLIVOLT OUTPUT BNC Connector Observe 9999 70 mV indication on the DC voltmeter Select segment 3 by using the keystroke sequence SEGM mel dd Observe DC DC 00000 0 Hz 999 9 mV with an indication of 999 9 7 0 mV on the DC voltmeter Select segment 4 by the method used in Step 5 and observe DC DC 00000 0 Hz 99 99 mV with an indication of 99 99 0 70 mV on the DC voltmeter Select segment 45 and observe DC DC 00000 0 Hz 9 999 mV with an indication of 9 999 0 07 mV on the DC voltmeter Connect a frequency counter to the SQUARE WAVE OUTPUT and a true rms AC voltmeter to the MILLIVOLT OUTPUT Select segment 46 Observe SIN RMS 00100 0 Hz 9999 mV with an indication of 9999 70 mV rms on the AC voltmeter Select segment 47 Observe SIN RMS 99 999 9 Hz 9999 mV with an indication of 99 999 9 2 0 Hz on the frequency counter and 9999 120 mV rms indication on the AG voltmeter Select segment 48 Observe SIN RMS 10 000 0 Hz 9999 mV with indication of 10 000 0 2 Hz on the frequency counter and 9999 120 mV rms on the AC voltmeter Select segment 49 Observe SIN PK 01000 0 Hz 9999 mV with an indication of 7070 50 0 mV rms on the AC voltmeter Select segment 410 Observe SIN PK PK mode 01000 0 Hz 9999 mV with an indicat2. distortion at 10 50 100 500 1000 5000 and 10000 Hz Check for less than 0 5 distortion at 20 k 50 k 70 k and 100 kHz Disconnect all test equipment Replace the top cover 5 screws Astronics Test Systems Calibration Procedure 4 3 346B User Manual Publication No 980956 Rev A This page was left intentionally blank Calibration Procedure 4 4 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Chapter 5 Trouble Shooting This Chapter provides the operator with information regarding troubleshooting of the 346B The 346B consists of a mother board Assy 3984 one indicator driver board Assy 4045 and two display indicator boards Assy 4031 The two indicator boards are plugged into the indicator driver board through a 12 pin SIP connector The driver board gets connected to the mother board through a 20 pin connector and ribbon cable marked J1 Power Supply The Power Supply Section of the unit is located on the right side of the mother board The transformer marked T1 provides the 18 and 18 Volts and transformer T2 provides the 5 and 5 Volts Check the unit for 1 2 Amp Slow Blow Fuse and be sure voltage selection switcher S1 Figure 4 1 is in the proper position for the power input voltage and the primary power voltage is within the 10 limits Check the 4 regulators marked U1 U4 for the proper voltages Front Panel Keypad Problem Unable to input anything from the keypad 1
3. Check the blue connector from the front panel key pad to the display driver board Be sure it is plugged in completely 2 The probable problem is the keyboard encoder U3 on the display driver board Replace the part Astronics Test Systems Trouble Shooting 5 1 346B User Manual Publication No 980956 Rev A Save Recall Problem Cannot save or recall any file 1 Check Chapter 2 Operation and make sure the procedure is followed correctly 2 All the memory for file is filled up and there is no more room for any more files Read to the SAVE FILE in Chapter 2 Operation 3 The SRAM could be bad Replace U8 on the main board Once the new SRAM is installed you have to delete all the files in the SRAM and program the new files Refer to the SAVE FILE in Chapter 2 Operation Frequency Problem The unit reads a different frequency than is entered 1 Make sure the ENTER key has been pressed each of the 6 digits should have a number in it 2 The problem could be with any of the 5 counters marked U21 U25 Replace one at a time to fix the problem 3 The problem could also be caused by the 1 0 ports Replace the ports Ul7 U20 one at a time to fix the problem Level Problem There is no output at the BNC connector 1 Gould be a problem with the 18 or 18 Volts on the power supply Check the regulators for proper voltages 2 The output driver circuit could have been damaged if there is a signal at pin 8
4. ETEN 4 1 91 SCN Cas REE EE EE E EA E 4 1 FEN 4 2 BP og 5 5 III eae nace acon aca see acies nacelncietaceun dame enentsceeartat R 4 3 NNN 5 1 Trouble Sho Ninas 5 1 Poe SUN ar 5 1 FOM Fre REP 5 1 SAVE GR 5 2 FRESQUI A AA a 5 2 Pero 5 2 ii Astronics Test Systems Publication No 980956 Rev A 346B User Manual List of Figures Figure 1 1 346B Synthesized Calibrator oooccccccocnnconncccnoncnnonononncnncnononnnnnnnnnnnnnnnnnnnncnnnnnnnnncnnnnss 1 1 Figure 2 1 Front Panel Keypad rrrnnnnnnnrvnnnnnnvvrnnnnrnnnnnnrennnnnnennnnnnennnnnnrennnnerennnnsnennnnnssennnnssennnnseennnn 2 2 Figure 2 2 Rear Panel Terminal Strip and BNGS cocoooccnnccccnoccnnnccnonncononononncnnnnononnnnnnnonancnnncnnnnnnnnnnss 2 3 Figure 2 3 346B LayouUt rrnnnnnnrnnrnnnnvnvnnnnvnnnnnnrnnvnnnrenrnnnnrnnnnnnrnnnnnnsnnnnnnsennnnnnsnnnnnnsnnnnnnssnnnnnnennnnnunsen 2 15 Figure 4 1 115230 VAC SWIC OT it scada 4 1 Figure 4 2 Adjustment Resistor Ela ke RGAGGU OG 4 2 Astronics Test Systems 346B User Manual Publication No 980956 Rev A List of Tables T ble 31 Programming RUNCIONS use 2 1 iv Astronics Test Systems Publication No 980956 Rev A 346B User Manual DOCUMENT CHANGE HISTORY 05 18 2011 Document Control release Astronics Test Systems 346B User Manual Publication No 980956 Rev A This page was left intentionally blank vi Astronics Test Systems Publication No 980956 Rev A 346B User Manual Chapter 1
5. FILE land then SEGM TOTAL The number should appear on frequency indicator Press any key to go back to normal operation I Ikey The first file number will appear on the display simply press I ley again and it will indicate the next file number until it displays LL which means the end of the files To delete all the files press You cannot delete a single file but you can save a new file in place of the old file number For example if you have File 22 which you don t need anymore simply save the next file under the File 22 This would copy a new file in place of the old file which is no longer needed Astronics Test Systems Publication No 980956 Rev A 346B User Manual Sweep Input and Sweep UP DN The sweep input is a BNC connector on the rear panel Input a square wave signal with a level of O to 5 Volts at a frequency ten times the desired linear sweep rate The UP DN terminal when at low level 0 Volt causes the frequency to sweep down and when at 5 Volt to sweep up The SWEEP UP can be activated by pressing the SWEEP TIME land then key There must be an input signal at the Sweep input jack on the rear panel J and it will sweep down The and keys are used to change the sweep direction Press CLEAR land it stops the sweep Press the key I Astronics Test Systems Operation 2 7 346B User Manual Publication No 980956 Rev A RS 232 Bus Remote Operation The RS 232 Bus Assy TTI 4118 must be
6. Systems Operation 2 15 346B User Manual Publication No 980956 Rev A This page was left intentionally blank Operation 2 16 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Chapter 3 Performance Test Procedure General The test provides a method to test the 346B Synthesized Calibrator for compliance to the manufacturer s specifications The unit is designed with integrated circuitry and very stable parts Astronics Test Systems recommends calibration on a one year schedule Test Equipment Note Equivalent test equipment may be substituted 1 Digital Multimeter Fluke 45 or equivalent True RMS 2 Frequency Counter Leader LCD 822 or equivalent 3 Oscilloscope Tektronix 922 4 Distortion Analyzer Hewlett Packard 334A Test Set Up A program file has been stored in memory under File Number 99 To recall File 99 perform the following keystroke sequence PLE 9 9 Jana ENTER Set the program to i 1 by performing the keystroke entry SEGM Lo andlENTER The frequency should indicate 00346 2 coded for 346B and the level indication will be 4 digits with one digit to the right of the decimal point NOTE THIS FILE CAN BE ERASED THE INFORMATION FOR THIS FILE HAS BEEN INSERTED AT THE END OF THIS SECTION IN THE EVENT THIS FILE GETS ERASED Astronics Test Systems Performance Test Procedure 3 1 346B User Manual Publication No 980956 Rev A Test Procedures 1 10 11 12
7. intentionally blank Performance Test Procedure 3 4 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Chapter 4 Calibration Procedure The 346B Synthesized Calibrator is packaged on a single printed circuit board All the adjustments are accessible from the top of the unit with the top cover removed Test Equipment Note Equivalent equipment can be substituted Digital Multimeter Keithley 191 Voltage to Charge Converter Trig Tek 2030 Charge Amplifier Trig Tek 203M Distortion Analyzer Hewlett Packard 334A Procedure Before turning on the unit check the 115 230 VAC switch S1 Figure 4 1 near the transformer for proper setting to accommodate the power to be used Connect the power cord to AC power and place the ON OFF switch to ON Figure 4 1 115 230 VAC Switch S1 Astronics Test Systems Calibration Procedure 4 1 346B User Manual Publication No 980956 Rev A 1 Connect the AC Voltmeter to the mV OUTPUT jack of the calibrator 2 Select the SIN RMS mode Set the frequency for 500 0 Hz and the level for 9999 millivolts refer to Chapter 2 Operation 3 Set the Level ADJ R2 Figure 4 2 for an indication of 9999 2 millivolts on the AC voltmeter A E ar F i i T m I i il ail a 2 Figure 4 2 Adjustment Resistor R2 select the SQ PK PK mode Connect the oscilloscope to the mV OUTPUT Check that the rise and fall time 10 to 90 are less than 1 2 us at 1
8. receive the status of the present segment use the following command OT SS The status information will be put in a buffer Therefore right after the output command the controller computer has to become a receiver in order to receive the information in the buffer The received information would look like the following FR 02000 0 LE 10 00 MD 2 This indicates a sinewave of 2000 0 Hz at 10 00 millivolts RMS To receive status on Segment 8 use the following command OT SG 08 Operation 2 10 Astronics Test Systems Publication No 980956 Rev A 346B User Manual The received information would look like the following FR 10000 0 LE 580 0 MD 3 T 4 which indicates a sinewave of 10000 Hz with a Level of 580 millivolts pk and dwell time of 4 seconds If status of more than one segment is needed just list them continuously one after the other For example to receive status of segments 4 12 and 21 use the command OT SG04 SG 12 SG21 The received information will show the status of each segment in that order To check the existing file numbers in the unit use the following command OT FI The output would look like the following 05 files 08 42 55 66 12 which means there are 5 files in the unit with file numbers 08 42 55 66 and 12 Astronics Test Systems Operation 2 11 346B User Manual Publication No 980956 Rev A IEEE 488 Remote Operation The optional IEEE 488 Bus Assy TTI 3869 must be installed to ope
9. to circuit when ON Six digit selection by keypad for 0 1Hz Level Selector Four digits 0 010 9999 settings of level Selects RMS Peak pk pk or DC units at Fo the output Displays 2 00000015 LED s indicate SEGMENT NUMBER 2 LED s indicate PROG program or REM remote Introduction 1 4 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Dimensions 3 5 high 13 deep Operates either 115 or 230 V RMS AC power 50 400 Hz at approximately 25 Astronics Test Systems Introduction 1 5 346B User Manual Publication No 980956 Rev A This page was left intentionally blank Introduction 1 6 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Chapter 2 Operation Programming Functions Table 3 1 Programming Functions OPERATION MODEL 346B SYNTHESIZED CALIBRATOR PROGRAMMING FUNCTIONS TO PROGRAM PRESS THESE KEYS PROVIDES FREQ FREQ 1 2 3 4 ENTER 123 4 HZ LAST DIGIT 0 1HZ FREQ H INCREASE FREQ DECREASE LEVEL f 123 4 MILLIVOLTS LEVEL INC INCREASE LEVEL DEC DECREASE 5 SEC DWELL END OF AUTO STOPS THE AUTO STEPPING STEPPING SEQ SEQ AT PREVIOUS SEG GO TO SEG SEG 14 OF FILE SEG INC NEXT SEGMENT SEG DEC PREVIOUS SEGMENT START OR STOP START START STEPPING OF AUTO STEPPING STOP STOP STEPPING SEQ SAVE FILE SAVE 1 7 ENTER SAVES SEQ FILE 17 EE CODE FILE EXISTS PH_CODE MEM_IS_FULL FILE RECALL FILE 2 3 ENTER RECALLS FILE 23 MODES AND UNITS MOD
10. 0 100 1000 10000 and 100000 Hz PC Output The pC OUTPUT should vary less than 0 5 from the mV OUTPUT This procedure provides a means of checking the pC OUTPUT The method used is to compare the voltage to picocoulomb converter at the pC OUTPUT with a known converter the 2030 Voltage to Charge Converter The 2030 Voltage to Charge Converter is a precision 1000 pf capacitor with the proper shielding to assure noise free measurements 1 Connect the input of the 2030 Voltage to Charge Converter to the Calibrator mV OUTPUT 2 Connect the charge output of the Voltage to Charge Converter to the ACCEL input of the charge amplifier 203M or equivalent 3 Set the charge amplifier input to 10 pC g and the LP filter to HIGH select the SIN PK mode Set the frequency for 500 Hz and the level for 9999 millivolts 5 Use the sensitivity controls to set the meter for an indication of the charge amplifier for exactly 1000 g s Calibration Procedure 4 2 Astronics Test Systems Publication No 980956 Rev A 346B User Manual 6 Move the charge amplifier input lead from the output of the voltage to charge converter to the pC OUTPUT jacks front and rear panel The new indication on the charge amplifier should be between 995 and 1005 for each output front and rear panel Distortion 1 Connect the Distortion analyzer input to the calibrator mV OUTPUT Select the SIN RMS mode Set the level for 9999 millivolts Check for less than 0 25
11. AIsTRONICS TEST SYSTEMS Trig Tek 346B Synthesized Calibrator User Manual Publication No 980956 Rev A Astronics Test Systems Inc 4 Goodyear Irvine CA 92618 Tel 800 722 2528 949 859 8999 Fax 949 859 7139 atsinfo astronics com atssales astronics com atshelodesk astronics com _http www astronicstestsystems com Copyright 2011 by Astronics Test Systems Inc Printed in the United States of America All rights reserved This book or parts thereof may not be reproduced in any form without written permission of the publisher THANK YOU FOR PURCHASING THIS ASTRONICS TEST SYSTEMS PRODUCT For this product or any other Astronics Test Systems product that incorporates software drivers you may access our web site to verify and or download the latest driver versions The web address for driver downloads is http www astronicstestsystems com support downloads If you have any questions about software driver downloads or our privacy policy please contact us at atsinfo astronics com WARRANTY STATEMENT All Astronics Test Systems products are designed to exacting standards and manufactured in full compliance to our AS9100 Quality Management System processes This warranty does not apply to defects resulting from any modification s of any product or part without Astronics Test Systems express written consent or misuse of any product or part The warranty also does not apply to fuses software non rechargeable batte
12. D 2 T 5 SA SG 20 You can recall a segment and bring up the parameters on that segment by using the following command RC SG 20 This will bring up the parameters on segment number 20 To save all 31 segments under a file number use the command SA FI 55 This will save all the segments under File number 55 To recall a file use the command RC FI 60 Astronics Test Systems Operation 2 13 346B User Manual Publication No 980956 Rev A This will bring up all the 31 segments which have been saved under File number 60 There are some commands which can be used to cause the unit to output the proper information back to the computer The command OT output should be in fiont of the string of commands to receive information back from the unit For example if you need to receive the status of the present segment use the following command OT SS The status information will be put in a buffer Therefore right after the output command the controller computer has to make thr unit 346B a talker in order to receive the information in the buffer The received information would look like the following FR 02000 0 LE 10 00 MD 2 This indicates a sinewave of 2000 0 Hz at 10 00 millivolts RMS To receive status on Segment 8 use the following command OT SG 08 The received information would look like the following FR 10000 0 LE 580 0 MD 3 T 4 which indicates a sinewave of 10000 Hz with a Level of 580 millivolts
13. E SINE SQUARE TRIANGLE DC PK PK PK RMS FILE QUANTITY FILE TOTAL TOTAL FILES STORED FILES USED FILE 4 LIST FILES IN MEMORY FROM O TO 99 LL CODE END OF LIST DELETE FILES FILE MODE ENTER DELETE ALL FILES START AGAIN E IA CANCELS LAST ENTRY CALIBRATION SEQ SEQUENCE PROG PROGRAM SEG SEGMENT INC INCREASE FREQ FREQUENCY DEC DECREASE MEM MEMORY AUTO AUTOMATIC Astronics Test Systems Operation 2 1 346B User Manual Publication No 980956 Rev A Operation Grounds Operation 2 2 The 346B Synthesized Calibrator generates signals with frequencies from 0 1 Hz to 99999 9 Hz with 0 1 Hz resolution The level of the signal can be set from 0 1 to 9999 millivolts or picocoulombs lt can generate sinewave triangle wave square wave and DC The following is a description of how to set the different parameters using the front panel keypad Figure 2 1 Turn the unit on by placing the power switch to ON position MODE SEGM UNITS TOTAL SWEEP START TIME STOP LEVEL Figure 2 1 Front Panel Keypad There are two grounds on the terminal strip on the back panel of the unit Figure 2 2 marked SIG for signal ground and CHAS for chassis ground The signal ground is the same ground as all the output BNC connectors The chassis ground is connected to the chassis and the third wire on the input power line These two grounds are connected together on the terminal strip when it is shipped from the f
14. Introduction The 346B Synthesized Calibrator unit Figure 1 1 provides frequencies from 0 1Hz to 99999 9Hz in 0 1 Hz steps The signal output is in millivolt and picocoulomb levels with selected units of RMS pk pk pk or DC Levels from 0 010 to 9999 millivolts or picocoulombs can be selected The Frequency and Level can be set elther by the keypad on the front panel local or by the bus remote Remote operation is an optional feature The unit operates as a stand alone unit without the remote bus Frequency accuracy Is 2 parts in 100 000 and the level accuracy is 0 5 of set level 0 2 of full scale SYNTHESIZED CALIBRATOR MODEL H Med EZO n f ia T Ed ma fv FREQUENCY UNITS cu BA z CLAS FILM MILLAASLT F a it sea a 3 7 ld Ba ven mu g Figure 1 1 346B Synthesized Calibrator The unit has non volatile memory capacity to hold 24 files of 31 segments Each of the 31 segments can have different frequency level and units The segment can be stepped manually or a dwell time between 1 and 9 seconds can be used to step through the segments Integrated circuitry is used throughout The components are packaged on a printed circuit board with an integral power supply A rack mount kit is provided and the unit dimensions are 3 5 high 19 wide and 13 deep The MILLIVOLT output is converted to picocoulomb at the PICOCOULOMB output The frequency is the same the picocoulomb level is the same as the millivolt
15. actory Separate the grounds if the chassis ground of this 346B is not the same as the unit being tested Astronics Test Systems Publication No 980956 Rev A 346B User Manual OUTPUT INPUT F R OUTPUTS FEN Figure 2 2 Rear Panel Terminal Strip and BNCs Frequency Set Up To set a new frequency press the FREQ key Enter the desired frequency using the keypad Do not enter any decimal point since the decimal point is always on the same location 0 1 Hz resolution For example to set the frequency for 250 0 Hz press the following keys After the ENTE key is pressed the PROG light will go off and the signal with the new frequency will be at the output jacks In order to increase or decrease the frequency by the and keys simply press the key and then the and keys This will increase and decrease the Frequency setting of the unit Astronics Test Systems Operation 2 3 346B User Manual Publication No 980956 Rev A Level Set Up To set a new level press the key on the keypad Enter the desired level using the keypad Make sure the Level is in millivolts or picocoulombs For example to set the Level for 80 0 millivolts press the following keys Leve gt 8 gt o gt 0 gt ENTER After the ENTE key is pressed the PROG light will go off and the signal with the new Level will be at the output jacks If 4 digits is entered for the Level the operator does not need to press the ENTER key it automatically e
16. ct Astronics Test Systems Operation 2 9 346B User Manual Publication No 980956 Rev A The following shows some examples for different commands To set the frequency for 200 Hz use the following command FR 200 If there are more than one parameter to be set just list them continuously one after the other For example to set the frequency for 500 6 Hz Level for 20 8 millivolts rms sinewave Mode 2 and dwell time of 5 seconds use the following commands FR 500 6 LE20 8 MD 2 T 5 Once all the parameters for a segment is set you can save that segment under a segment number For example to save under segment 20 use the following command SA SG 20 You can combine the two above strings into one command FR 500 6 LE 20 8 MD 2 T 5 SA SG 20 You can recall a segment and bring up the parameters on that segment by using the following command RC SG 20 This will bring up the parameters on segment number 20 To save all 31 segments under a file number use the command SA FI 55 This will save all the segments under File number 55 To recall a file use the command RC FI 60 This will bring up all the 31 segments which have been saved under File number 60 There are some commands which can be used to cause the unit to output the proper information back to the computer The command OT output should be in front of the string of commands to receive information back from the unit For example if you need to
17. ent should show up on the indicators It is also possible to increment the segments by pressing the following keys would move to the previous segment Each segment has a dwell time associated with it This time can be any number between 1 to 9 seconds This is used when the unit is programmed to step through the 31 different segments and dwell at each segment for the programmed dwell time duration PressLSWEEP TIME ang it shows the dwell time for that segment it should indicate 1 to 9 If a new dwell time is desired press any key between 1 and 9 to change it to a new time otherwise press CLEAR Once all of the 31 different segments have been programmed the operator can cause the 346B to step through each segment and dwell at each segment for the preset time duration This can be done either through the keypad or by using the two terminals on the back panel the keypad press START STOP and it will start the sequence Press START STOP again and it will stop the sequence If there are less than 31 segments set the dwell time for the segment after the last segment for 0 For example if there are only 10 segments set the dwell time for segment 11 for 0 second and it will step through segments 1 through 10 and then it will stop Remote From the remote apply 5 Volts to the ST ST Terminal and it will start the sequence If you remove the 5 Volts it will stop the sequence Also if you apply 5 Volts to the RESET ter
18. he protective third wire earth ground If the instrument fails to operate satisfactorily shows visible damage has been stored under unfavorable conditions has sustained stress Do not operate until performance is checked by qualified personnel Publication No 980956 Rev A 346B User Manual Table of Contents o 1 1 INTOAUENON ii i a a 1 1 So KE 1 2 A caa der R E R 1 2 DG Output MINH PU MING ae 1 3 Square Wave Od 1 3 SWEEP INPUT ss 1 4 ENN 1 4 PENN FN 1 4 DIMENSION A nena cade ce a a a a a ctnactees 1 5 POWO NN 1 5 Og 0 1 Zarra iii 2 1 Opera aa 2 1 FP LOGK AMINO UCU OMS EE RE EN EK 2 1 OPEN 2 2 COUN A ue EN SEE NR et KE 2 2 FV EU 2 3 ESE Oo EE EE ee Re 2 4 CUMS UNC 1 01 0 EEE 2 4 Froglaminable Fles EEE EEE NE EEE 2 4 Segment PO ETNE 2 4 HEN erre isla amcor aan cat canta antian haluaianad amet GaN amcinialtaete 2 5 ETE NST EE dr 2 6 sweep NpuUt and Sweep UP DN 00 eee 2 7 RS 232 BUS Remote OPA Vu 2 8 EEE 488 Remote OPA INN 2 12 Installing IEEE Interface Board Assembly TT 3869 ooocccooocccccccononcconcnononncnnononanccnnononancconcnnnnns 2 15 Chapler Judd 3 1 Performance Test Procedure n xnanxrnnnnnnnunnnnnnnnnnnnnennnnennnnnnnnennnnnnnvennnennnnennnnnnnnennnnennnnnnne 3 1 A EE EE MER 3 1 TEEN 3 1 A EE ER 3 1 TE PO SS 3 2 Files 99 Perfonmance FestiProdra Mesina id iia 3 3 Astronics Test Systems 346B User Manual Publication No 980956 Rev A Chapter daa 4 1 Calibration Procedure did 4 1
19. installed See Fig 2 3 for help in installation LIST OF RS 232 BUS COMMANDS ied 0108 Dwell time x 0 to 9 Seconds ST5 Stop the Sweep SA SG xx Save under segment number xx 01 to 31 RC SG xx Recall Segment xx 01 to 31 SA FI xx Save under file number xx 00 to 99 RC Fl xx Recall file number xx 00 to 99 the present segment OT SG xx Output Segment XX 01 to 31 status OT Fl Output all the existing File numbers NOTE All commands must be entered in capital letters and there must be one space between each command Operation 2 8 Astronics Test Systems Publication No 980956 Rev A 346B User Manual The MD Command could have 7 different possibilities Depending on the waveform needed one of these 7 modes should be selected for each segment There is a 4 position switch marked S1 on the plug in board for the RS 232 Interface The following shows each switch setting for S1 Input strings received over the RS 232 Interface are not executed or checked for proper syntax until an input terminator is received The valid terminator is LF Line Feed or CR Carriage Return The unit is set at 9600 baud rate even parity 7 character 1 stop bit and echo OFF at the time of shipping factory Therefore a communication port can be set up as OPEN COM1 9600 E 7 E CS DS CD AS 1 which is COM1 at 9600 baud rate even parity 7 character 1 stop bit disregard clear to send data set ready and carrier dete
20. ion of 3535 25 mV rms on the AC voltmeter Select segment 11 Observe SQ PK PK 01000 0 Hz 9999 mV with an indication of 5000 115 mV rms on the AC TRMS voltmeter or 5550 115 mV rms on the AC AVERAGING voltmeter Select segment 412 Observe TRI PK PK 01000 0 Hz 3464 mV with an indication of 1000 23 mV on the AC TRMS voltmeter and 970 23 mV on the AC AVERAGING voltmeter Connect an oscilloscope to the MILLIVOLT OUTPUT Select segment 46 and observe a clean sine wave with no distortion Press START STOP and observe the waveforms as they appear The intervals are set for 5 seconds and will stop at segment 12 Performance Test Procedure 3 2 Astronics Test Systems Publication No 980956 Rev A 346B User Manual 20 Connect the calibrator mV OUTPUT to Distortion Analyzer to verify Distortion is equal or less than the listed values with the mV OUTPUT level set at 9999 millivolts rms 100 Hz 1 kHz 10 kHz 50 kHz 5 max 100 kHz 1 0 max File 99 Performance Test Program SEGMENT FREQUENCY MODE LEVEL UNES TIME NOTES me pu oe EG 00346 2 XXX 0 XXX IS THE SERTIAL NO DC 1999 5 SEG 2 5 SEG 2 5 SEG Ed ae ee mme ee FREQ 00100 0 9999 RESPONSE CHECKS 7 999909 9 SIN 19999 a pp MODE 1000 0 9999 PEAK UNITS CHECKS e TR AN N gt La Astronics Test Systems Performance Test Procedure 3 3 346B User Manual Publication No 980956 Rev A This page was left
21. loyees subsidiaries affiliates and distributors harmless against all claims arising out of a claim for personal injury or death associated with such unintended use FOR YOUR SAFETY Before undertaking any troubleshooting maintenance or exploratory procedure read carefully the WARNINGS and CAUTION notices RISK OF ELECTRICAL SHOCK human life and safety and is capable of inflicting DO NOT OPEN personal injury A CAUTION This equipment contains voltage hazardous to If this instrument is to be powered the AC line mains through an autotransformer ensure the common connector is connected to the neutral earth pole of the power supply Before operating the unit ensure the conductor green wire is connected to the ground earth conductor of the power outlet Do not use a two conductor extension cord or a three prong two prong adapter This will defeat the protective feature of the third conductor in the power cord 3 Maintenance and calibration procedures sometimes call for operation of the unit with CAUTION power applied and protective covers removed Read the procedures and heed warnings pps to avoid live circuit points STRONG ELECTROSTATIC ELECTROMAGNETIC MAGNETIC OR RADIOACTIVE FIELDS Before operating this instrument 1 Ensure the proper fuse is in place for the power source to operate 2 Ensure all other devices connected to or in proximity to this instrument are properly grounded or connected to t
22. minal it will move to the first segment on the program Therefore if the test needs to start at segment one first apply the 5 Volts to RESET then remove it and apply the 5 Volts to the ST ST terminal Astronics Test Systems Operation 2 5 346B User Manual Publication No 980956 Rev A Save File Operation 2 6 The 346B has non volatile SRAM which allows it to save 24 different files Each file consists of up to 31 segments or setups Therefore after all the parameters have been set for the segments or segment whichever will be used the operator can save those segments under a two digit file number Press SAVE key the PROG Light comes on and the frequency indicator indicates P Enter two digits between 0 to 9 and then press ENTER If you make a mistake anywhere in the sequence pressl CLEAR and start over again For example to save under File 22 press the following keys gt 2 gt If the code PH appears on the display it indicates the 24 files are filled and no more files can be saved If the code EE appears on the display it indicates a file with that file number already exists If you presstENTER it will replace the old file with the new file if you press another key it will not save the file To recall a file press and the two digit file number and then the ENTER key For example to bring up File 22 press the following keys To check the total number of files which have been saved press
23. nters the data In order to increase or decrease the LEVEL by the and keys simply press the level key and then and keys This will increase and decrease the Level setting of the unit Units and Modes The 346B provides 7 different outputs These are DG DC Sine Wave RMS Sine Wave Peak Sine Wave pk pk Square Wave pk pk and Triangular Wave pk pk Simply press MODE UNITS and step through the seven different options and observe the unit and mode LEDS Programmable Files The 346B has an internal non volatile memory The unit has the capability to store 24 files each file can have up to 31 segments that include a frequency level and dwell time Segment Programming Operation 2 4 When programming the segments of a file the PROG STEP LED below the Freq indicator will indicate which segment is selected For example if the light for 1 and 4 are on it means the segment 5 1 4 5 is selected and it shows the frequency and level of that segment While on that segment the operator can make a change on the level and frequency of tlie segment note the mode and unit selected at the time will be stored In order to move to a different segment press the SEGM TOTAL key and the segment number For example to select segment 2 press the following keys SEGM TOTAL gt Astronics Test Systems Publication No 980956 Rev A 346B User Manual The PROG Step Light should indicate 2 and the frequency and level for that segm
24. of U46 and no signal at pin 11 of U43 any one of the transistor Q1 Q4 could be bad Problem The output level is not correct 1 Make sure the ENTER key has been pressed and each of the 4 digits should have a number in it 2 The unit may require calibration Refer to Chapter 4 Calibration 3 The D A Converter could be bad Replace U47 on the main board Trouble Shooting 5 2 Astronics Test Systems
25. ons from a competitive source or used for manufacture by anyone other than Astronics Test Systems The information herein has been developed at private expense and may only be used for operation and maintenance reference purposes or for purposes of engineering evaluation and incorporation into technical specifications and other documents which specify procurement of products from Astronics Test Systems TRADEMARKS AND SERVICE MARKS All trademarks and service marks used in this document are the property of their respective owners e Racal Instruments Talon Instruments Trig Tek ActivATE Adapt A Switch N GEN and PAWS are trademarks of Astronics Test Systems in the United States DISCLAIMER Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should ensure that they are used properly and in accordance with this document and any other instructions provided by Seller Astronics Test Systems products are not specifically designed manufactured or intended to be used as parts assemblies or components in planning construction maintenance or operation of a nuclear facility or in life support or safety critical applications in which the failure of the Astronics Test Systems product could create a situation where personal injury or death could occur Should Buyer purchase Astronics Test Systems product for such unintended application Buyer shall indemnify and hold Astronics Test Systems its officers emp
26. pk and dwell time of 4 seconds If status of more than one segment is needed just list them continuously one after the other For example to receive status of segments 4 12 and 21 use the command OT SG 04 SG 12 SG 21 The received information will show the status of each segment in that order To check the existing file numbers in the unit use the following command OT FI The output would look like the following 05 files 08 42 55 66 12 which means there are 5 files in the unit with file numbers 08 42 55 66 and 12 Operation 2 14 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Installing IEEE Interface Board Assembly TT 3869 1 Remove top and bottom covers 3 screws at rear 2 flat head screws at center Retain hardware Remove screws lockwashers on 2 threaded spacers on component side of PC Board near transformers Retain hardware Refer to Figure 2 3 Slide Interface Board Assembly TT 3869 into connector shell on rear panel Engage PI P2 headers into Hi profile sockets on main PC Board Push firmly into place after insuring all pins are engaged Install screws lockwashers removed in Step 2 above to hold board assembly Re install top and bottom covers using hardware removed in Step 1 above ADDRESS SWIT REAR PANEL CONNECTOR FUSE POWER ET AMPHENOL i 57 1912 01 Tt BUS ASSY ER o IL Kau ODO S i S I FRONT Figure 2 3 346B Layout Astronics Test
27. rate in Remote mode See Fig 2 3 for installation information LIST OF IEEE 488 BUS COMMANDS ede 0108 Dwell time x 0 to 9 Seconds ST5 Stop the Sweep SA SG xx Save under segment number xx 01 to 31 RC SG xx Recall Segment xx 01 to 31 SA FI xx Save under file number xx 00 to 99 RC Fl xx Recall file number xx 00 to 99 the present segment OT SG xx Output Segment xx 01 to 31 status OT Fl Output all the existing File numbers NOTE All commands must be entered in capital letters and there must be one space between each command Operation 2 12 Astronics Test Systems Publication No 980956 Rev A 346B User Manual The MD Command could have 7 different possibilities Depending on the waveform needed one of these 7 modes should be selected for each segment The following shows some examples for different commands To set the frequency for 200 Hz use the following command FR 200 If there is more than one parameter to be set just list them continuously one after the other For example to set the frequency for 500 6 Hz Level for 20 8 millivolts rms sinewave Mode 2 and dwell time of 5 seconds use the following commands FR 500 6 LE20 8 MD 2 T 5 Once all the parameters for a segment is set you can save that segment under a segment number For example to save under segment 20 use the following command SA SG 20 You can combine the two above strings into one command FR 500 6 LE 20 8 M
28. ries damage from battery leakage or problems arising from normal wear such as mechanical relay life or failure to follow instructions This warranty is in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular use The remedies provided herein are buyer s sole and exclusive remedies For the specific terms of your standard warranty contact Customer Support Please have the following information available to facilitate service 1 Product serial number 2 Product model number 3 Your company and contact information You may contact Customer Support by E Mail atshelodesk astronics com Telephone 1 800 722 3262 USA Fax 1 949 859 7139 USA RETURN OF PRODUCT Authorization is required from Astronics Test Systems before you send us your product or sub assembly for service or calibration Call or contact Customer Support at 1 800 722 3262 or 1 949 859 8999 or via fax at 1 949 859 7139 We can also be reached at atshelodesk astronics com If the original packing material is unavailable ship the product or sub assembly in an ESD shielding bag and use appropriate packing materials to surround and protect the product PROPRIETARY NOTICE This document and the technical data herein disclosed are proprietary to Astronics Test Systems and shall not without express written permission of Astronics Test Systems be used in whole or in part to solicit quotati
29. s 0 3 Astronics Test Systems Introduction 1 1 346B User Manual Publication No 980956 Rev A Specifications Millivolts Output Connector BNC front and rear panels Waveform Sinewave Operating Temperature Storage Temperature 9 999 99 99 999 9 or 9999 mV full scale with RMS PEAK or PK PK units Freq Range 0 1 Hz 99999 9 Hz 99999 9 Hz Accuracy Freq Set 20 ppm 0 to 70 C Level Level Set Accuracy ae p settings 0 2 FS from 1 Hz to Waveform Triangular Wave 9 999 99 99 999 9 or 9999 mV FS pk pk units Level Set Accuracy ot oe 0 3 FS 0 1 Hz to Level Waveform Square Wave Rise fall time 10 90 Less than 1 2 usec Asymmetry 10 kHz Less than 1 Introduction 1 2 Astronics Test Systems Publication No 980956 Rev A 346B User Manual Level ee 99 99 999 9 or 9999 mV FS pk pk Level Set Accuracy 2 of setting 0 3 FS DC Output Millivolt plus minus Impedance Less than 10 ohms 9 999 99 99 999 9 or 9999 mV DC full Level Set Accuracy 0 5 of setting 0 2 FS Square Wave Output Impedance Less than 1k ohm 5 mA max Waveform Square wave Level Oto 4 V 1 Volt Rise Fall Time Less than 1 0 usec Astronics Test Systems Introduction 1 3 346B User Manual Publication No 980956 Rev A SWEEP INPUT Wave Shape Square wave 0 to 5 Volt level Frequency equals 0 1 Hz sec Frequency 10Hz input is 1 Hz sec Controls Power Switch Applies power
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