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004-0690-303 - EF Johnson Technologies

1. 2 3 AUDIO ALIGNMENT CHANNEL CONTROLLER TO FROM 2 5 CARD REMOVAL AND RE INSERTION PROCEDURE GENERAL a ed a Ee He a 1 Sh aes MEARS Cae eee 1 RE INSERTDION a last 1 PAST PROCEDURES ALIGNMENT AND AUTO 1 GENERAD 1 ALIGN THRESHOLD AND TIMING B 1 DETAILED PROCEDURE GoD aoe ates 1 CALIBRATE UNI DIRECTIONAL NON REDUNDANT SYSTEMS B 3 DETERMINE AND SET OVERLAP OFFSET B 6 MANUAL TIME AND PHASE PROCEDURES B 8 GENERAD E eo Meas Mites Wane atten he E ae B 8 ADDITIONAL TEST EQUIPMENT REQUIRED To Section 2 2 B 8 SYSTEM AUDIO TIMING eet teh thd bate ds wat heed dt ees B 8 COARSE PHASE ALIGNMENT eG Sek ha B 10 FINE DATA PHASE ADJUSTMENT 11
2. 13A 734 NYO D 134 v ua D s D 134 118 NYO 25 TANNVHO 203 0109 20 2 1 883 WAY 9S WIW 1 OL anya 0096 NO WIN OL 0072 440 06 1 WAY TIVO Figure 2 4 ALIGNMENT POINTS May 1998 Part No 004 0690 303 2 7 TUNING PROCEDURE 5 52 IN 272 PPO Oa WATCHDOG BALANCED RX TX ee 5 123 5 5 123 HSDB 5 11 059 12 MULTI NET 22 918 EPROM MEMORY 135 LOADING 1 10 DS1 2 USED WITH CR3 4 FOR ALARMS 21 5 6 GRN MPC OPERATIONAL BLINKING 4 ON HIGH POWER OFF LOW POWER 9 92 5 ON LTR OFF MULTLNET CH RED 23 USED WITH DS1 FOR ALARMS RED 5V 12V PROGRAMMING SELECT CONNECTOR 321 COMPUTER I O 76800 38400 19200 J3 2 9600 4800 2400 1200 13 14 Figure 2 5 MAIN PROCESSOR CARD ALIGNMENT POINTS May 1998 Part No 004 0690 303 2 8
3. B 2 HARD WARESTOOL Mate B 2 HARDWARE gt TOOLS gt RAW TX RX B 2 HARDWARE cock B 2 OVERLAP OFFSET CONCEPT eS VARs B 6 IE NRRL B 6 FIVE MIGROSECOND OFFSET Cure B 7 a Vk Pa oN le tna se ial B 9 deh lead isin Reais Aide B 9 REMOTE SITE SMC 84 SETTINGS ole ks Eh B 12 REPEATER CONTROLLER SMC 54 SETTINGS B 12 REMOTE SITE SMC 83 SETTINGS oe B 12 REMOTE SITE SMC SWITCH 51 beads B 12 CHANNEL CONTROLLER SMC 5155 8 B 12 LIST OF TABLES CHANNEL ICONS DURING CALIBRATION eee B 5 REPEATER ICONS DURING B 5 S4 SETTINGS oi 11 November 1998 Part No 001 7600 001 ii GENERAL INFORMATION SECTION 1 GENERAL INFORMATION 1 1 SCOPE OF THE MANUAL This manual presents an overview of the ele ments in Johnson Simulcast Radio System The interconnecti
4. LINSNVAL ANIT 1 TIOULNOD ATTIONLNOD 414405 ATaHS CALVO 1 15 ALIS ALOWaY Ualvaaay ONAS ZHIN 01 Ez _ OWS 1 TANNVH 145 ZHIN 01 ZHIN 01 ZHIN 01 yaxana 549 YANIAWOD LINSNVAL Figure 1 2 SIMULCAST SYSTEM BLOCK DIAGRAM May 1998 Part No 004 0690 303 1 3 GENERAL INFORMATION May 1998 Part No 004 0690 303 1 4 TUNING PROCEDURE SECTION 2 TUNING PROCEDURE 2 1 GENERAL This section presents the procedures used for adjusting signal levels through the Simulcast System It is intended for use during system installation and for periodic maintenance It will be helpful to refer to fig ures 1 1 and 1 2 when implementing the procedures NOTE Whenever a Remote Site repeater is powered off then on during the course of this tuning procedure no activity i e a Multi Net call should be pre
5. 1998 Part 001 7600 001 1 1 1 2 2 1 2 2 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 B 3 B 4 B 5 B 6 B 4 B 5 B 6 B 3 B 4 B 8 B 10 B 12 B 13 TABLE OF CONTENTS CONT D LIST OF FIGURES MULTLNET SYSTEM BASIC 5 1 2 SIMULCAST SYSTEM BLOCK DIAGRAM 2 2 222 gt gt 25225 2 5 04 2 0 1 3 TE CONNECUOR 2 3 E 2 6 hed ed 2 6 RVM ALIGNMENT POINTS L506 bbe dim shapes es 2 7 MAIN PROCESSOR CARD ALIGNMENT POINTS 2 8 SMAC ALIGNMENT POINTS yore 2 9 REMOTE SITE SMC ALIGNMENT 5 2 10 CHANNEL CONTROLLER SITE SMC ALIGNMENT 5 241 INTERFACE ALARM CARD ALIGNMENT 5 2 12 2 13 MESSAGE BRIDGE CARD ALIGNMENT POINTS 2 14 HARDWARE MENU
6. 00 AD LEVEL TP GROUND 15V TP POWER SUPPLY DC ON OFF May 1998 Part No 004 06 EDURE ALARM 1 ALARM 2 gt INVERTED al NON INVERTING 1501 1502 2214 ALARM 3 8 1 5V 5502 15 5 a GND 1503 3 OUTPUT 1 2 ALARM 2 3 AD LEVEL 15 15 5 5V CWID HANG YEL SWITCH YEL MOBILE GRN XMIT RED 1500 1505 SQUELCH ENABLE OUTPUT ALARM 4 8 5V 2 5503 5 4 GND 1504 ALARM 4 1 2 2 3 AD LEVEL gt NON INVERTING 0503 CONTROL 8 5 2 5501 5 GND 64 32 Figure 2 9 INTERFACE ALARM CARD ALIGNMENT POINTS 90 303 2 12 500 501 SLNIOd WIO 01 2 941614 0 0690 700 Hed 8661 J31 1110987654321 YEL 0 402 404 413 GROUND 8 33 4 __ 12 ____ 95 C J MAIN RX aoe resres R44 MAIN TX TP30 5 4 MAIN INPUT Rx 22 J LINE 7 8 53 64 32 8 2 R102 J36 Jg on 414 7890 ak SA ONINNL TUNING PROCEDURE 53 52 IN sleet RESET 202945 WATCHD
7. SITE 1 SITE 2 22 Best reception is where multiple signals are received at precisely the same time SITE 1 SITE 2 Offset 0 Offset 0 50 50 Time to travel Initial calibration sets all repeaters to transmit at the same time Figure 5 NO OFFSET SITE 2 Best reception can be moved by setting overlap offset The offset offset also affects overlap areas with other repeaters SITE 1 SITE 2 Offset 5 Offset 5 45 55s Time to travel The delay at Site 1 is offset by 5 us more and the delay at Site 2 is offset by 5 us less than the initial calibration Figure B 6 FIVE MICROSECOND OFFSET B 1 5 1 DETERMINE OVERLAP OFFSET VAL UES NOTE Calibration must be completed first refer to Section B 1 4 Overlap offset values are determined by changing the buffer delay values from the SMC Configuration dialog box The buffer delay values must then be returned to their original calibrated values and the overlap offset values are entered in file With this arrangement the system can be periodically cali brated for minor propagation changes without affect ing the overlap offset values Overlap offset values apply to a site therefore only one channel needs to be used to determine the values 1 Select a System icon 2 Select menu item System gt Calibration gt SMC Configuration 3 Select a repeater from the list PAST PROCED
8. 1 5 DETERMINE SET OVERLAP OFF SET In a Simulcast System repeater coverage areas overlap A radio in the overlap area may receive two or more signals If the signal strengths are similar the radio s receive circuits capture two or more signals The signals often will not arrive at precisely the same time therefore the audio from the radio is distorted The amount of distortion is more noticeable in some locations than in other locations depending on the dis tance between the location and each site that is heard The distortion pattern of the overlap area can be changed with overlap offsets Initially repeaters are calibrated so that they all transmit at the same time An overlap offset causes a repeater to transmit a little earlier or a little later than the initial calibration time A change in the time of transmission changes the time the signal arrives at the location and therefore change the amount of distortion at each location Overlap offset values are set in increments of 1 microsecond For a rule of thumb A radio signal travels at 0 186 mile per microsecond so a setting of 5 microseconds moves the distortion pattern approxi mately 1 mile Figure B 4 illustrates the overlap offset concept May 1998 Part No 004 0690 303 B 6 In overlap areas a distorted audio signal is heard when two or more signals are received if there is a time offset between the signals Figure 4 OVERLAP OFFSET CONCEPT
9. At the Channel Controller remove the three cards associated with the required channel in this order CAUTION Cards must be removed and re inserted in proper order or severe damage may occur 5 At this time card can get switched or extender can be put into place so that re insertion of the cards can take place A 1 A 1 2 RE INSERTION The following steps must be taken to re insert cards in a required channel to complete changes or tuning etc without turning the power to the shelf off 1 At the Channel Controller re insert the three cards associated with the required channel in this order 5 SMAC NOTE If tests to be performed on this channel require more removal and re insertion of Channel Controller cards repeat the removal and re insertion steps in the order listed here 2 At the Host computer return the required channel to Normal state this should also re enable the associated CIM The channel should now be ready for operation NOTE If an MBC is present in the desired channel during removal and re insertion of the other cards it can remain in its slot Likewise if placing the MBC on an extender card for troubleshooting is necessary the channel cards can remain in their slots May 1998 Part No 004 0690 303 CARD REMOVAL AND RE INSERTION PROCEDURE May 1998 Part No 004 0690 303 A 2 PAST PROCEDURES APPENDIX B PAST PROCEDURES B 1 ALIGNMENT A
10. GND ADLEVEL TEST POINT TX DATA mE 0151 LOCAL SPKR ON OFF VOL LOCAL MIC SPEAKER MIC SPEAKER TUNING PROCEDURE J105 WATCH DOG NORMAL 2 1 RNT RS 232 SEC AUDIO TO RNT U149 TX RX NET a 4106 EXTERNAL MODEM 2 3 4 5 NORMAL OPERATION 1 2 3 4 LTR DATA MODEM SECONDARY AUDIO TO RNT SEC AUDIO FROM RNT MAIN AUDIO MAIN AUDIO FROM RNT N VOTER AUDIO 25 RX AUDIO ADJUST RX WB AUDIO 27 RX VOICE 31 15 99 TX VOICE 32 16 a VOTER 50 RX DATA I LEVEL LEVEL VOICE RX VOICE oc LEVEL LeveL N LEVEL N Figure 2 6 SMAC ALIGNMENT POINTS May 1998 2 9 Part No 004 0690 303 TUNING PROCEDURE crs O 0 O 0 1998 Part No 004 0690 303 J9 LAST SMC 1 gus SPLITTER 2 1615 TERMINATION 3 320 4 6448 5 125us FINE DELAY COURSE DELAY 6 250us 7 50005 8 1000us MW ON OFF SETUP STATE N A LEAVE OFF 125 TX LEVEL PHASE ADJUST N N RED NOT USED ALWAYS ON GREEN ON REMOTE SITE YELLOW 1 PPS 10 MHz WHEN FLASHING J5 BAUD RATE 9600 19200 RED ON TX 10 MHz IN J52 EPROM 34 56 BOOT
11. 7 Drive one tire over the base plate of the antenna mast 8 Set up two Yagi antennas on the mast One should be pointed at each of two repeater sites If the sites are visible the antennas may be visually pointed toward each site s tower If they are not visible use a compass and a map to point them in the proper direction 9 Fine tune the antenna direction to minimize interfer ence on the oscilloscope screen e Connect each antenna to the antenna jack on the two alignment radios the Simulcast Test Kit e Connect the discriminator output jacks of the radios to the two vertical inputs of the oscilloscope Chan nel 1 and Channel 2 e One radio should be tuned to Site 1 Channel 1 and the other to Site 2 Channel 2 B 2 3 2 TIMING 1 Trigger the oscilloscope off Channel 1 Carefully adjust the trigger level for a stable display A good clear display of two burst signals should appear one slightly ahead of the other The difference should be less than a few hundred microseconds If one signal is persistently weak and noisy it may be necessary to relocate Stay as close as possible to the original site so as not to skew the timing A few hundred feet is acceptable whereas a mile is not Be sure to main tain a distance from large buildings sheds barns and signs They will act as reflectors and interfere with the signal 2 If one of the sites is collocated with the Channel Controller this site should have no addition
12. Controller in SMC Link Timing Mode type 10 xx 08 xx 00 BF 02 Where xx represents the repeater number in hex 2 Press Enter 3 At Repeater Site verify that the returned values are not zero If the values are zero the Timing Tone Gain must be increased from the Host Computer B 1 3 7 TIMING TONE GAIN ADJUSTMENT To increase the Timing Tone Gain from the Host Computer if necessary follow these steps 1 Select the System icon 2 Select menu item System gt Calibration gt SMC Configuration 3 From the list select the Channel Controller cur rently being adjusted 4 Increase the Time Tone Gain value suggest 0 1 increments B 3 PAST PROCEDURES 5 Click the Write button 6 After the alarm Repeater Configuration Finished occurs repeat Section B 1 3 6 7 Repeat Steps 4 6 above until the return value at the repeater is not 00 00 B 1 3 8 REPEATER SMC NORMAL MODE 1 At the Repeater Site put the repeater in SMC Nor mal Mode type 10 xx 08 xx 00 BF 01 Where xx represents the repeater number in hex 2 Press Enter 1 3 9 CHANNEL CONTROLLER SMC MAL MODE 1 At the Channel Controller Site put the Channel Controller in SMC Normal Mode type 10 xx 08 xx 00 BF 01 Where xx represents the repeater number in hex 2 Press Enter NOTE REPEAT Section B 1 3 1 THROUGH Section 1 3 9 FOR EACH REPEATER AT EACH SITE IN THE SYSTEM B 1 3 10 ALL REPEATERS IN NORMAL STATE At t
13. 3 Enter the proper offset in the Site Settings box May 1998 Part No 004 0690 303 PAST PROCEDURES Click on the SAVE button 5 Repeat Steps 2 3 and 4 as needed for other sites 6 Close the Edit Offsets box 7 Recalibrate every channel in the system B 2 MANUAL TIME AND PHASE PROCE DURES B 2 1 GENERAL This Section describes manual procedures for timing and phasing Johnson Simulcast Radio System It will produce the same result as the proce dures discussed in Section 2 It may also be used after the procedures of Section 2 have been implemented in order to verify the results B 2 2 ADDITIONAL TEST EQUIPMENT RE QUIRED TO SECTION 2 2 800 MHz Omnidirectional Antennas 2 each Maxrad Model BMUF 8063 mag mount SINAD meter Appropriate cables connectors e Simulcast Test Set e Oscilloscope e 800 MHz Directional Yagi Antennas 2 each Sinclair Model SRL 406 1 Tire mount antenna mast e Version 8 35 beta test Repeater Programming Soft ware SED Box two total B 2 3 SYSTEM AUDIO TIMING NOTE The following procedures require two or three people to complete One at the Hub Site or Network Manager Location one at the Channel Controller if not collocated with the Network Manager and the oth er in the overlap region If other channels in the system are functional they may be used for two way commu nication during the alignment process Otherwise oth er methods are needed T
14. 5 After setting the timing for the designated location add or subtract the optimization correction factor for each site This data is supplied from a coverage optimization program The factors are in the form of plus or minus microseconds and are added or sub tracted to the settings of each site s delay setting B 2 3 5 NORMAL OPERATION When the alignment is complete restore the sys tem back to normal operation 1 When done timing a channel enter the following in 2000pgmr with the e option in Raw Rx Tx 10 xx 08 xx 00 BF 01 Where xx is the repeater number 2 At the Network Manager set the Channel Control lers SMC data gain back to the recorded level Typically 1 3 At the Network Manager or at the physical loca tions turn the repeaters that were shutdown back on 4 At the Network Manager record the final delay set tings at each site EXAMPLE Site 1 Channel 1 511 us Site 2 Channel 2 330 us Site 3 Channel 3 430 us 5 Now input the Site 1 Channel 1 level into all Site 1 repeaters Site 2 Channel 2 level into all Site 2 repeaters and Site 3 Channel 3 level into all Site 3 repeaters NOTE Keep in mind that the proper phase number 0 255 in the Network Manager corresponds to 0 360 The multiplying factor is 1 4 During the Phase procedure this needs to be input along with the delay Setting to set Remote Site Repeater SMC information with the Network Manager instead of Remote Sit
15. Enter see Figure B 4 5 Press F3 and select Mode 2 messages see Figure B 5 6 Put the Channel Controller in SMC Standby mode type 10 xx 08 xx 00 BF 03 Where xx represents the repeater number in hex 7 Press Enter B 1 3 4 REPEATER SMC LINK TIMING MODE 1 At the Repeater Site put the repeater in SMC Link Timing Mode type 10 xx 08 00 BF 02 Where xx represents the repeater number in hex 2 Press Enter 3 The repeater begins sending messages indicating the timing values The message appears as 08 xx 10 xx 00 C3 00 00 nn Where xx is the repeater number in hex nn is checksum in hex 4 If the return value indicated in bold above is not 00 00 the threshold value must be increased from the Host Computer 1 3 5 THRESHOLD VALUE ADJUSTMENT To increase the threshold value from the Host Computer if necessary follow these steps 1 Select the System icon 2 Select menu item System gt Calibration gt SMC Configuration 3 From the list select the repeater currently being adjusted 4 Increase the Threshold value suggest 0 1 incre ments 5 Click the Write button 6 After the alarm Repeater Configuration Finished occurs check the return values at the Repeater Site see Section B 1 3 4 7 Repeat Steps 4 6 above until the return value at the repeater is 00 00 1 3 6 CHANNEL CONTROLLER SMC LINK TIMING MODE 1 At the Channel Controller Site put the Channel
16. Installation Mode select It is only on to allow setup of the Channel Controller While the levels are being set this switch prevents the MAC from sending alarms that would cause the MPC to shutdown the Channel Controller can be overridden by Network Management May 1998 Part No 004 0690 303 PAST PROCEDURES Figure B 10 REMOTE SITE SMC S3 SET TINGS Figure B 7 REMOTE SITE SMC S4 SETTINGS 2 5 11 51 SIGNAL PATH SWITCHES This 8 section switch routes the audio data to and from the MAC to and from the microwave link Input is for a Channel Controller and output is for a Remote Site Figure B 8 REPEATER CONTROLLER SMC S4 SETTINGS B 2 5 9 S3 FINE DELAY COURSE DELAY These switches are the manual input for the timing delay setting at the Remote Site repeaters only can be overridden by Network Management Figure B 13 CHANNEL CONTROLLER SMC 51 1998 Part 004 0690 303 B 12
17. and possible remedies Channel Icons Description PAST PROCEDURES Table B 1 CHANNEL ICONS DURING CALIBRATION Remedy Other icons appear to the left of this icon as calibration proceeds To calibrate follow the instructions in Sec tion B 1 4 3 Flashing Data acquisition is in progress Be patient until data acquisition has fin ished Each repeater takes approximately 15 to 20 seconds The channel is writable Data acquisition for the channel is completed Two or more repeaters returned good data that may be written to the SMC If data is not to be acquired from other channels continue with the write procedure in Data acquisition for the channel was com pleted but not successful No timing values are written for this channel Fix any repeater problems and recalibrate the channel W Channel Icons The channel is reverted calibration could not be started Description Fix the problems that have caused the chan nel to revert Unrevert the channel Then calibrate the channel Table B 2 REPEATER ICONS DURING CALIBRATION Data acquisition has not occurred for the repeater To calibrate follow the instructions in Sec tion B 1 4 1 x Data acquisition was successful If data is not to be acquired from other channels continue with the write procedure in Section B 1 4 3 Data acquisition failed Possible causes 1 The repeater is rever
18. operation 55 all sec tions Off Repeater Data Path Selection Select the Data Path between the Repeater and the RNT Data over Voice Separate Data RS232 Press ENTER to Accept Press Spacebar to Select Figure 2 2 LINK TYPE Manual MAC Adjustment 0137 0140 0143 0146 0149 0138 U141 0144 0147 0150 0139 0142 0145 0148 9151 Voter Aud Mute TxA FSK J Normal Mod Mute Local Aud Mute Data To A D Tx Mod Mute Rx Mute Tx Aud Gate Tx Intcom Rx Opt Gate Tx Voice Gate Rx Sq Actv Rx Voice Gate Data Lvl Test Log Sq A D Rx Aud Gate CWID Tx Mod A D Rx Voice to Bp Lvl Detect Norm Rx FSK To Aud Gate Tx Opt Gate Digital Mod Repeat Gate Local Mic Mute Tx Net TxS To FSK Ext Mod Mute Rx Net Clear Settings Space Carrier OFF Test Freq None RSSI 0 Channel 0 Tx Freq 2489 387 Rx Freq 2444 387 Tab Select Next Field PgUp Dn 10 steps CurUp Dn 1 step FN4 Fan OFF Press F2 to Adjust Pot Press Spacebar to Select Figure 2 3 MANUAL MAC GATES May 1998 Part No 004 0690 303 2 6 TUNING PROCEDURE Lsnrav 13441 N99 dn 1 10433 38104 cme 959 159 103136
19. the same man ner as a Multi Net repeater The audio and Multi Net data from the Repeater Controller which is to be transmitted over the air is passed to splitters The outputs from the splitter are available for direct connection to the centrally located Remote Site and for linking to remotely located Remote Sites The audio data signal is connected to MA MB on the repeaters is processed and is then transmitted over the air Additional Simulcast related equipment is shown in Figure 1 2 The GPS units 10 MHz splitter drawer and OCXO drawer are required to maintain synchroni zation throughout the entire system Also shown in Figure 1 2 is standard equipment such as combiners duplexers and multiplexers May 1998 Part No 004 0690 303 GENERAL INFORMATION CHANNEL 1 CHANNEL 10 CHANNEL 1 CHANNEL 1 Te CHANNEL CONTROLLERS CHANNEL 10 a CONSOLES Figure 1 1 MULTI NET SYSTEM BASIC COMPONENTS May 1998 Part No 004 0690 303 1 2 GENERAL INFORMATION INIT XL ONAS OWS ONAS OWS AN9 TaNNVHO ALIS ee 5441
20. ATA LEVEL ADJUST 12 At the Channel Controller turn SMC switch S4 section 5 Off 1 kHz tone and turn SMC switch 54 Section 4 125 Hz Tone 13 the Remote Site use a receiving IFR to monitor deviation With Network Management adjust the appropriate Remote Site SMC Data Gain see Step 2 for location of the pop up memu for precisely 1 0 kHz deviation NOTE Adjust the Data Gain of the Remote Site Repeater which is being aligned DO NOT adjust the Channel Controller Data Gain 14 At the Channel Controller turn SMC switch S4 section 4 Off 15 This concludes the Simulcast portion of the tuning procedure for this channel at this Remote Site At the Remote Site remove the SMC from the extender card and replace the SMC in the repeater IMPORTANT Section 2 3 Steps 5 6 and 9 15 must be repeated for all Remote Site repeaters for this channel before continu ing with Section 2 4 NOTE This tunes the Simulcast transmitter portion of the channel from a single point the tones from the Channel Controller SMC 2 4 SIMULCAST THRESHOLD ALIGNMENT AND MANUAL CALIBRATION 1 When completed with the Simulcast tuning portion of a specific channel threshold alignment and man ual calibration is next to be performed with Net work Management May 1998 Part No 004 0690 303 2 2 NOTE A condensed version of the steps necessary is listed here For more detailed description of the oper ation or for troubleshooting
21. ND AUTO CALIBRATION B 1 1 GENERAL This section describes use of the Network Man agement system for performing the time and phase alignment of an Johnson Simulcast Radio System Simulcast systems must be aligned and calibrated to avoid distorted signals in areas that have repeater cov erage overlap During calibration the Channel Con troller sends a timing tone that is used to determine the length of time it takes for a signal to reach each repeater The repeaters buffer and phase delays are then adjusted so that all repeaters will transmit at the same time and phase The timing of the entire system is synchronized by Global Positioning System GPS B 1 2 ALIGN THRESHOLD AND TIMING TONE GAIN Before the Network Management System can calibrate a Simulcast System the repeaters and Chan nel Controllers must be adjusted properly This proce dure sets the appropriate parameters to ensure calibra tion by the Network Manager B 1 2 1 EQUIPMENT REQUIRED e Network Management host computer running OpenView If the System gt Calibration gt SMC Configuration menu is not present exit OpenView copy the file SERVICE INI from the first installa tion disk to the SITECTR directory then restart OpenView Two laptop computers with 2000pgmr software version 8 38 beta or later and repeater program ming cables B 1 2 2 OVERVIEW The process of setting up a Simulcast System to allow Network Management calibration invol
22. OG BALANCED RX TX 76 mee 5 123 2 3 123 HSDB 44 11 059 12 MULTI NET 24 918 EPROM MEMORY 135 LOADING 1 10 51 2 USED WITH CR3 4 FOR ALARMS 2 5 6 GRN MPC OPERATIONAL BLINKING 4 ON HIGH POWER OFF LOW POWER 22 5 OFF CE RED gt USED WITH DS1 FOR ALARMS RED 5V 12V PROGRAMMING SELECT m CONNECTOR 321 COMPUTER I O 76800 38400 19200 13 6 9600 4800 2400 1200 13 14 Figure 2 11 MESSAGE BRIDGE CARD ALIGNMENT POINTS May 1998 Part No 004 0690 303 2 14 CARD REMOVAL AND RE INSERTION PROCEDURE APPENDIX A CARD REMOVAL AND RE INSERTION PROCEDURE A 1 GENERAL This procedure assumes that removal and re insertion of Channel Controller cards for testing etc is desired and that there is at least one other channel in this Channel Controller shelf that is operating in a Simulcast system A 1 1 REMOVAL The following steps must be taken to Remove cards in a required channel with intentions of replac ing acard or to place a card in an extender card with out turning the power to the shelf off 1 At the Host Computer place the required channel in Setup State this should also disable the associ ated CIM
23. Simulcast System Alignment Manual Second Printing May 1998 Supersedes May 1997 Part No 004 0690 303 5 98mwp Printed in U S A SIMULCAST SYSTEM ALIGNMENT MANUAL Copyright 1997 by the E F Johnson Company The Johnson Company designs and manufactures two way radio equipment to serve a wide variety of communi cations needs Johnson produces equipment for the mobile telephone and land mobile radio services which include business industrial government public safety and personal users LAND MOBILE PRODUCT WARRANTY The manufacturer s warranty statement for this product is available from your product supplier or from the Johnson Company 299 Johnson Avenue Box 1249 Waseca MN 56093 0514 Phone 507 835 6222 WARNING This device complies with Part 15 of the FCC rules Operation is subject to the condition that this device does not cause harmful interference In addition changes or modification to this equipment not expressly approved by E F Johnson could void the user s authority to operate this equipment FCC rules 47CFR Part 15 19 DO NOT allow the antenna to come close to or touch the eyes face or any exposed body parts while the radio is transmitting DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere DO NOT operate the radio unless all the radio frequency connectors are secure and any open connectors are properly terminated DO NOT allow children to operate
24. UP MODE 10 CONNECTOR Re AUDIO DATA IN TX MOD RESET WATCHDOG 1 V DISABLE J6 GND TX lt 08 DATA RX J8 2 1 VOTER DATA IN 458 N J7rsil BALANCED RS2 2 ON MA MB INPUT H 3 3 ON RS4 4 OFF AUDIO DATA 5 ON OUT 216 OFF 7 OFF 5 SIGNAL PATH P2 Figure 2 7 REMOTE SITE SMC ALIGNMENT POINTS 2 10 O O CR11 O TUNING PROCEDURE J9 LAST SMC SPLITTER TERMINATION 120 1 8 5 2 16us 3 3205 4 64us 5 125us 6 250us 7 500us 81000us 70 FINE DELAY COURSE DELAY 1 STOP PASS DATA SIGNALING 2 ENABLE DISABLE SETUP STATE 125 Hz DATA TONE 1 kHz TONE RED NOT USED ALWAYS ON GREEN ON REMOTE SITE YELLOW 1 PPS 10 MHz WHEN FLASHING RED ON TX 10 MHz IN J52 4 BOOT UP MODE 10 COMPUTER AUDIO DATA IN RESET 0 9600 gt 21920 J5 2 BAUD RATE TX MOD WATCHDOG DISABLE G TX J6 NDF DSP DATA RX J8 VOTER DATA IN OPEN 158 12345 P2 BALANCED a MA MB INPUT AUDIO DATA OUT SIGNAL PATH Figure 2 8 CHANNEL CONTROLLER SITE SMC ALIGNMENT POINTS May 1998 Part No 004 0690 303 TUNING PROC 525 1 23 L 2 501 0 02 crsos 04
25. URES 4 Click the Read button 5 From the Buffer Delays section make a note of the calibrated Buffer Delay values from the User Defined sets These values need to be re entered at the end of these instruction 6 Modify the Buffer Delay value Each increment changes the transmit time 1 micro second which is the amount of time it takes the sig nal to travel approximately 0 186 mile The signal travels approximately 1 mile in 5 increments time Incrementing a positive direction increases the delay before transmitting which moves the distor tion pattern closer to the repeater Incrementing ina negative direction decreases the delay before trans mitting which moves the distortion pattern farther from the repeater 7 Click the Write button 8 Repeat Steps 3 7 above for other repeaters on the channel that affect the overlap area 9 Check the reception in the overlap area 10 If necessary repeat Steps 3 4 and 6 9 until the over lap area distortion pattern is acceptable Do not repeat Step 5 11 Make a note of the new Buffer Delay values for each repeater that was changed 12 Subtract the values noted in Step 5 from the values noted in Step 11 Results may be negative or posi tive 13 Modify the SITECTR INI file as instructed in Sec tion B 1 5 2 B 1 5 2 MODIFY SITECTR INI AND RECALI BRATE SYSTEM 1 Select System gt Calibration Edit offsets 2 Select click on the site to be changed
26. al delay added There is a special filter that simulates the group delay of the multiplexer channel cards and it adds approximately 1 ms of delay This is done by switch settings on the SMC It is necessary to add approximately 800 5 of delay to the other sites to get close to the delay of the collocated site Use the Network Management SMC Configuration menu to set the delays in each repeater By observing the scope screen see Figure B 3 it is possible to observe the approximate number of microseconds that must be added or subtracted to get the wave forms from each site even It generally takes a large change followed by two or more small changes The scope displays two traces one from Site 1 Channel 1 and one from Site 2 Channel 2 Notice the delay offset The Network Manager is used to set delays in repeaters to sync the signals B 9 PAST PROCEDURES CHANNEL 1 CHANNEL 2 DELAY OFFSET OSCILLOSCOPE Figure B 3 3 Once the traces are close to being in sync place the scope in X Y mode to show minute differences in timing A straight diagonal line with no perceiv able ellipse shows a well timed system see Figure B 4 NEEDS MORE ALIGNMENT CORRECTLY ALIGNED Figure B 4 May 1998 Part No 004 0690 303 PAST PROCEDURES 4 When the first two sites are adjusted continue to other sites until completed in the same manner Adjust timing to other repeaters at each site in the same manner
27. e 2000 at this time Place the SMAC into an extender card Connect the transmission test set to SRXA Adjust R239 Main Audio to RNT on the SMAC for 12 dBm see Figure 2 6 On the associated CIM connect the transmission test set between J11 and ground see Figure 2 10 Adjust R41 on the CIM for 6 dBm AUDIO FROM RNT 7 Set the CIM into Test 1 S5 section 1 Off sections 2 3 and 4 On Connect transmission test set between J12 and ground 9 Adjust R44 on the CIM for 12 dBm 10 Start the 2000pgmr at this time Make sure that the Link Type is Digital From the Repeater Program ming software select Test gt RNT Interface gt Select Link Type gt RS232 see Figure 2 2 May 1998 Part No 004 0690 303 TUNING PROCEDURE 11 From the Repeater Programming software select Test gt RNT Interface gt Adjust Links lt Enter gt then press F2 until the Voice Audio from screen appears This screen selects the appropriate MAC gates to on a Set SMAC S100 all sections OFF 5101 all sections OFF b The CIM is already set to generate an alignment tone c Connect the transmission test set to J100 J103 on the SMAC and adjust R243 Main Audio from RNT 6 dBm 387 mV RMS d Set switches 5100 5101 for digital communication 12 Take the Channel Controller out of the alignment mode and back into normal operation escape from the alignment screen 13 Place the CIM back to normal
28. e SMC dip switches May 1998 Part No 004 0690 303 B 2 4 COARSE PHASE ALIGNMENT NOTE One person can perform this alignment once the Network Management places phase control on the DIP switches in the repeaters However it is a good idea to have a person at the Network Management con sole in case a repeater is accidentally not in the proper configuration 1 Connect an IFR to a repeater as in Section 2 5 Modulate the generator with a 1 kHz tone at 1 5 kHz deviation and 1 kHz data deviation from a SED Box 2 Using the Network Management SMC Configura tion menu ensure that the Channel Controller data gain is set at its original level Typically 1 and that it is not shut off not set to 0 3 At each repeater connect a SED box to display Multi Net data decode The cable should be con nected to J58 pin 5 Tx MOD 4 Using the Network Management SMC Configura tion menu set the Remote Site repeater SMC to accept phase adjustment from the DIP switches Make copies of Table B 3 as needed to use in determining the best phase setting The list of numbers in Table B 3 represents switch settings on SW4 positions 5 through 8 see Figure B 8 Set the Network Management to allow DIP switch control of the phase Starting with 0000 proceed through all 16 combinations noting which ones produce steady good data on the SED box If the data fades in and out mark it bad in the Table There will be a range of positions wher
29. e there is good data Typically 7 or 8 If the range is an odd number of SMC switch settings leave the setting in the middle If the range is even leave the setting on the lower of the two middle settings Read the phase adjustment from the Network Management SMC Configuration menu and copy it into the setting box provided This will later be adjusted to fine tune the system Select this box as the setting returning phase control to Network Manage ment B 2 5 FINE DATA PHASE ADJUSTMENT CRITICAL ADJUSTMENT This procedure is extremely critical for proper Simulcast operation Failure to do it properly may result in unacceptable noise levels in overlap areas 1 Connect the IFR to a repeater as in Section 2 5 Modulate the generator with a 1 kHz tone at 1 5 kHz deviation and 1 kHz data deviation from the SED box 2 Using the Network Management disable all but two repeaters on the channel being worked on 3 Travel to the location used for overlap timing between the two repeaters for the test 4 Connect one radio of the Simulcast Test Set to an Omnidirectional antenna 5 Connect the speaker microphone output to the SINAD meter DO NOT connect the discriminator output to the meter Only the audio tone without data is required 6 Record the current reading If a service monitor is used use the analog meter if available or set the digital reading for a slow averaging response 7 Using the Network Managemen
30. ecessary CHANNEL CONTROLLER RECEIVE AUDIO LEVEL ADJUST 20 Add audio to the Data Only Multi Net call still at 1 5 kHz deviation 1 2 kHz for NPSPAC 21 This step checks the level of the Channel Controller audio input stage a Using 2000pgmr e go into Hardware gt Tools gt Manual MAC Adjust Select the following gates Voter Audio Mute Rx Mute Rx Option Gate Repeat Gate LEVEL DETECT Tx Option Gate Normal Mod Mute Tx Mode Mute Selecting Level Detect allows 7100 and J103 Ground to be monitoring points for the call s audio level at a point after the Voter Audio Input Adjust stage R233 Also select 717149 not to be adjusted at this time and Select F2 With a Test Set measure J100 J103 for 6 0 dBm at 1 kHz factory set The full range of R233 would yield levels at this test point from 14 dBm to 3 dBm The range of the EEPOT U149 which is adjusted if necessary in Steps 22 23 will NOT reach the appropriate output level if this test point is below 8 5 dBm If the level is not 6 0 dBm but above 7 5 dBm continue with Step 22 If not con tinue with the rest of Step 21 Escape the Manual MAC Adjust screen Bring down the call by placing the IFR into RCV The SMAC will need to be placed on the extender card From Step 19 the SMC should be on the extender card Turn the Channel Controller shelf off Swap the 2 cards and turn the shelf back on Bring the Multi Net call with audio
31. en Remote Repeater and associated RVM 12 Verify 12 dBm at 1 kHz signal If the value 15 incorrect verify a 12 dBm signal at RXA RXA at the Remote Site If the signal is present check the wiring and link equipment This step checks for loss between Remote Site and input to the Voter 13 Connect the Transmission Test Set to RVM voted audio output MLM Audio to the Channel Controller This is the connection between the Voter and Channel Controller NOTE If the Voter output has not been tuned proceed with Step 14 only If the Voter output has been tuned proceed with Step 15 only 14 The level should be at 12 dBm with a 1 kHz tone If incorrect and no tuning of the Voter output has been completed the RVM output EEPOT needs to be adjusted see Figure 2 4 Set 52 sections 1 3 Off 2 On Set section 4 Off to increase the output when press ing S1 Set section 4 On to decrease the output when press ing S1 b Press S1 bottom push button in to change the out put value to 12 dBm 0 5 dB at 1 kHz NOTE Step 15 is included only to verify that the chan nel s Voter output alignment was done properly 15 The level should be at 12 dBm with a 1 kHz tone If incorrect and tuning of the Voter output has been done bring the call down and wait 1 2 minutes for the Voter input for this Remote Site to self align to the Pilot Tone Bring the call back up and recheck the level Record the level if it is stil
32. en the data acquisition process for the selected channel finishes the icons next to the channel and associated repeaters change e An OK icon indicates that data acquisition was suc cessful for a repeater May 1998 Part No 004 0690 303 B 4 A Wicon indicates that the channel is writable two or more repeaters have returned good data e Other icons indicate that the data acquisition pro cess was not successful See Section B 1 4 3 for icon descriptions and remedies Repeat Steps 3 6 above to acquire data for addi tional channels 8 When data has been acquired for all channels to be calibrated continue with the Write Procedure in Section B 1 4 3 Data is only written to repeaters that display an OK icon CAUTION If all repeaters on a channel do OK icons writing that channel s data may cause poor simulcast performance The recommended pro cedure is to close the manual calibration dialog box fix any unsuccessful repeaters and recali brate the associated channels An exception can be made if a repeater is disabled and remains dis abled When the disabled repeater is put back into service the associated channel should be recalibrated B 1 4 2 DATA ACQUISITION ICONS In the System gt Calibration gt Manual Calibra tion dialog box icons appear beside the channel and repeater names to indicate the status of data acquisi tion The following tables list the icons their descrip tions
33. ender card may need 10 MHz extender cables NOTE See Appendix A for the procedure to properly remove and re insert Channel Controller cards hot swapping an operating system if necessary 5 On the Remote Site place the SMC on an extender card may need 10 MHz extender cables 6 On the Channel Controller switch the SMC switch 54 section 5 this sends 1 kHz tone to the Remote Sites CHANNEL CONTROLLER TRANSMIT LEVEL ADJUST 7 On the back of the Channel Controller connect a transmission test set to and adjust R29 on the SMC for 12 0 dBm at 1 kHz Ensure that the test set is receiving in Bridge mode and not Terminate mode 8 Connect the test set to the 1 6 splitter outputs to check for unity gain If outputs are not 12 0 dBm adjust the splitter s front panel gain control for 12 0 dBm REMOTE SITE REPEATER TRANSMIT AUDIO LEVEL ADJUST 9 On the back of the Remote Site Repeater connect the test set to MA MB and verify a 12 dBm 0 2 dBm at 1 kHz reading If outputs are not 12 dBm check the link equipment and connec tions for settings and accuracy May 1998 Part No 004 0690 303 TUNING PROCEDURE 10 On the Remote Site Repeater connect an oscillo scope to SMC WO 10 and adjust R37 for 1 9V P P 1 2 dBm at 1 kHz with a test set 11 At the Remote Site SMC use a receiving IFR to adjust R32 for 1 5 kHz deviation 1 2 kHz for NPSPAC REMOTE SITE REPEATER TRANSMIT D
34. he Host Computer Put all repeaters in the system in Normal State Click on a repeater icon Select menu item Repeater gt Normal State e Repeat for each repeater at each site in the system B 1 4 CALIBRATE UNI DIRECTIONAL NON REDUNDANT SYSTEMS The manual calibration process occurs in two steps Data Acquisition Procedure May 1998 Part No 004 0690 303 PAST PROCEDURES Information is collected that is used to automati cally calculate the repeaters buffer and phase delays see Section B 1 4 1 Write Procedure The calculated values are written to the Simulcast Modulation Cards SMCs in the repeaters see Sec tion 1 4 3 B 1 4 1 DATA ACQUISITION PROCEDURE 1 Select a System icon Select menu item System gt Calibration gt Manual Calibration 3 Select a channel from the list Click the Acquire Data button If the channel is the Status Channel a dialog box is displayed Click OK to continue the process for the Status Channel Click Cancel to cancel data acqui sition for the Status Channel Ifa Channel cannot be calibrated message appears the Channel Controller may be described incorrectly In the Channel Controller s Describe dialog box the Repeater Type should be Simulcast Controller Data acquisition requires some time A flashing icon next to the channel name indicates that data acquisition is in progress Status messages appear below the Write button Wh
35. he SED Box h Set the IFR to generate a 1 kHz tone at 1 5 kHz deviation 1 2 kHz deviation NPSPAC 2 3 TUNING PROCEDURE Figure 2 1 42 CONNECTOR REMOTE SITE REPEATER RECEIVE AUDIO LEVEL ADJUST 4 Connect transmission test set between the RXA and RXA on the green connector on the rear of the repeater 5 Ensure a call is set up see Figure 2 9 CR540 on IAC Mobile Green LED 500 Transmit Red LED 6 Set Audio Tone Level by adjusting R239 on the MAC for 12 dBm at 1 kHz tone Remember to set the test set for Bridge Mode not Terminate Mode REMOTE SITE REPEATER PILOT TONE LEVEL ADJUST NOTE Section 2 5 Steps 4 6 must be done first R239 sets the Main Level Output The Pilot Tone rides with this level 7 Take the call down by placing the IFR to RCV 8 Connect transmission test set between the RXA and RXA on the green connector on the rear of the repeater 9 Set Pilot Tone Level by adjusting R240 on the MAC for 20 dBm at 1200 Hz tone Wait 1 2 minutes for the RVM to self align stabilize when adjustment is complete especially if alignment through the voter has not been completed May 1998 Part No 004 0690 303 TUNING PROCEDURE VOTER AUDIO LEVEL ADJUST 10 Bring the call back up at the Remote Site 11 Connect the Transmission Test Set to RVM audio input RDM RDM the punch block or on the Backplane of the Voter shelf for the appropriate Remote site Betwe
36. his procedure uses two or more RF channels a different channel at each site to be timed A single channel may be used if signals are rel atively equal at the test point May 1998 Part No 004 0690 303 B 8 B 2 3 1 SYSTEM SETUP 1 At the Network Manager record the SMC data gain levels for the channel in the Channel Controller used for the test and reset them to 0 This is done by selecting the System Icon then select the System pull down and then go into SMC Configuration Write the information 2 While in the SMC Configuration set the delay of each Remote Site repeater to be used to 500 us 3 Start 2000pgmr with the e option and go to the RAW TX RX Mode 2 Enter 10 xx 08 xx 00 BF 04 Where xx is the repeater number This starts the 1 burst per second timing signal on the channel 5 Shut down all the channels that interfere with the test This can be done manually or using Network Management Example Timing a three site system e On Site 1 Channel 1 is used for the test turn off Channel 2 and Channel 3 On Site 2 Channel 2 is used for the test turn off Channel 1 and Channel 2 On Site 3 Channel 3 is used for the test turn off Channel 1 and Channel 2 Do not attempt to time two or more at one time or severe interference will be experienced on the oscillo scope screen align 1 vs 2 then 2 vs 3 6 Drive to the location designated by Applications Engineering for overlap alignment
37. information refer to the Network Management For Simulcast Service Manual Part No 001 0690 201 Section 7 Alignment and Cal ibration 2 At the Network Manager click on the System icon and pull down System gt Calibration gt Threshold Alignment A window titled Threshold Alignment should pop up 3 Click on the channel you just completed tuning at all Remote Sites to highlight both the channel and the Start Alignment box Click on the Start Alignment box Operation of the Host computer should take about 1 2 minutes to run for a 3 Site channel If it has successfully finished running will be listed next to the channel and an OK will be listed next to each Remote Site por tion of this channel The numbers that have been calculated have already been written to each com ponent of this channel Troubleshooting should be done on the repeater that did not have an OK after Threshold Alignment is complete 5 Click on the Close box NOTE A uni directional system is assumed 6 At Network Manager click on the System icon and pull down System gt Calibration gt Manual Calibration A window titled Manual Calibration should pop up 7 Click on the channel that you have just completed the successful Threshold Alignment on to highlight the channel 8 Click on the Acquire Data box Operation of the Host computer should take under 1 minute to run for Site channel If it has successfu
38. justment 3 Select menu item Hardware gt Tools May 1998 Part No 004 0690 303 PAST PROCEDURES 4 File Edit Transfer Hardware Test Utilities HSDB Monitor Rx Tx Data RF Data Input Monitor Revisions Mode Select TTY Terminal Tools Figure B 3 HARDWARE MENU In the popup box select Raw Tx Rx and press Enter Select Desired Tool 1 Gate Selection Manual MAC Adjust RF Power Manual TIC Adjust Manual TPI Adjust Synthesizer Load TLA Data Raw Tx Rx Toggle Rx Capture Figure 4 HARDWARE gt TOOLS Transmit Formatted Data on COM 1 10 xx 08 xx 00 BF 03 Mode 2 Set Mode _ F4 Repeat Last Msg Valid Messages Received on COM 1 Figure 5 HARDWARE gt TOOLS gt RAW 5 7 Press and select Mode 2 messages Select Desired Mode 5 Mode 0 Mode 1 Mode 2 Figure 6 HARDWARE gt TOOLS Put the repeater in SMC Standby Mode type 10 xx 08 xx 00 BF 03 Where xx represents the repeater number in hex Press Enter May 1998 Part No 004 0690 303 B 2 1 3 3 CHANNEL CONTROLLER SMC STAND BY MODE 1 At the Channel Controller Site connect a laptop computer to the Channel Controller on the desired channel 2 Start the 2000pgmr software with the command 2000pgmr e This enables menu items required for adjustment 3 Select menu item Hardware gt Tools see Figure B 3 4 Inthe popup box select Raw Tx Rx and press
39. l incorrect one that is outside of 0 5 dB of 12 dBm Do this for the remaining Sites for this channel to determine if there was a problem when the Voter output level was set or if there is a variance in this Site s Voter output on this RVM May 1998 Part No 004 0690 303 2 4 CHANNEL CONTROLLER RECEIVE DATA LEV EL ADJUST 16 Set up a call with no audio at the Remote Site 17 At the Channel Controller Site with the SMC in the extender card connect an oscilloscope to P100 pin 29 Tx MOD and ground The data level should 0 8V If not start 2000pgmr then adjust 0151 with the following gates ON see Figure 2 3 Hardware gt Tools gt Manual MAC Adjust Voter Audio Mute Rx Mute Rx Option Gate Repeat Gate Tx Option Gate Normal Mod Mute Tx Mod Mute NOTE Must exit the Test Screen to view adjusted result When the manual MAC adjust screen is displayed there is no data output ESC escape from this test screen to view the data The correct levels are obtained by trial and error 18 At the Remote Site with the Data Only Multi Net call still up set up a receiving IFR with the appro priate frequency and the antenna port connected to either the monitor port of a transmit combiner Using a rubber duck antenna may result in receiving adjacent site s signal 19 At the Channel Controller adjust R37 on the SMC for a data deviation of 1 0 kHz 15 Hz using the receiving IFR at the Remote Site if n
40. lly finished run ning will be listed next to the channel and an OK will be listed next to each Remote Site portion of this channel Troubleshooting should be done on the repeater that did not have an OK after Manual Calibration is complete 9 The numbers that have been calculated have not been written to each component of this channel Click on the Write box Do not click on the Write box if Manual Calibration did not success fully get completed 10 Click on the Close box 2 5 SIMULCAST TUNING RECEIVERS SETTING UP THE CALL 1 Place the MAC on the Extender Card in the Remote Site repeater 2 Turn on the repeater Wait 1 2 minutes for the RVM in the Voter to self align before bringing up a Multi Net call especially if alignment through the voter has not been completed 3 Set the IFR to Transmit a Multi Net call a Connect the SED box to the Ext Mod SINAD Port of the IFR b Power the SED Box from the repeater IAC c Set Parameters Display Entry Encode Date Encode Data Repeater Mobile Mobile Digital Analog Analog Normal Inverted Normal Encode Decode Encode Enter the data as System Key UID HOME GID GOTO STA PRIR d Connect the IFR to the Receive port of the repeater e Set the frequency to the Receive frequency f Position the IFR to generate g Check that the Data Level coming from the SED is at 1 kHz Deviation If the level is low high Adjust Data out POT on t
41. mponents of a Multi Net System with the excep tion that Channel Controllers now take the place of Multi Net repeaters The repeaters are now distrib uted across multiple sites Relative to the RNT how ever Channel Controllers appear to be repeaters Review of the RNT manual Part No 001 3039 009 is recommended in order to understand its operation with respect to the UAS SMM RMF CPP Consoles and Telephone resources Figure 1 2 presents a more detailed view of the remainder of the Simulcast System To study its oper ation imagine a subscriber radio making a transmis sion which is received by the Channel 1 Repeaters at both the remotely located Remote Site and the cen trally located Remote Site The outputs from the repeaters audio on RXA and data Received Signal Strength Information RSSI and Multi Net data on VDIN are transmitted to the RVMs associated with Channel 1 For the centrally located Remote Site this is a direct connection while link equipment is required to connect the remotely located Remote Site to the Cen tral Control Site The RVM uses received signal strength information to select which signal to pass to the Channel 1 Repeater Controller The Repeater Controller contains the logic processing of a normal Multi Net repeater with additional signal processing which has been developed to allow Simulcast opera tion however it has no RF hardware The Repeater Controller is connected to the RNT in
42. ons between the various elements of the system are also illustrated The procedures used to tune and align the system during installation and maintenance are then discussed Before attempting to implement the procedures discussed in this document it is recommended that the Johnson manuals listed below be studied Manual Part Number 009 2100 001 001 2100 200 001 2008 920 001 3039 505 Simulcast Application Note Channel Controller Manual High Stability Repeater Manual Multi Net Voter Service Manual Network Management for Simulcast Service Manual Operator Manual System Manager Manual 001 0690 201 002 0690 201 004 0690 203 1 2 WHAT IS A SIMULCAST RADIO SYSTEM Simulcast as it applies to an Johnson two way radio system is the simultaneous transmitting of a message from two or more radio sites on the same radio channel In addition the strength of the receive signal at the various sites is monitored and a Voter selects the strongest signal That signal is then routed to all the sites for retransmission 1 3 SYSTEM ELEMENTS An Johnson Simulcast Radio System will typically incorporate a Network Management Sys tem Section 2 of Network Management for Simul cast Service Manual provides a review of the ele ments of the Network Management System The discussion in this manual will therefore focus on the other Simulcast System components Figure 1 1 shows a high level view of the basic co
43. same deviation back up Repeat Step 21a here NOTE See Appendix A for the procedure to properly remove re insert Channel Controller cards hot swapping an operating system if necessary d Adjust R233 for 6 0 dBm at J100 J103 Escape the MAC Adjust screen Continue with Step 22 For Section 2 5 Steps 22 24 the SMAC can remain on the extender card 22 Shut the data off in the Channel Controller s SMC as follows In the Network Manager under System gt Calibration gt SMC Configuration change the data gain from 1 0000 to 0 0000 23 At the Channel Controller adjust U149 on the SMAC using the 2000pgmr with the same gates on as in Step 2 for an audio deviation of 1 5 kHz 15 Hz 1 2 kHz 15 Hz NPSPAC using the receiving IFR at the Remote Site if necessary 2 5 TUNING PROCEDURE 24 At the Network Manager under System gt Calibration gt SMC Configuration change the Channel Controller s SMC Data Gain from 0 0000 to 1 0000 IMPORTANT Performing Section 2 5 will tune ONE Remote Site s Repeater Receive and the channel s Vot er Audio and the Channel Controller Audio and Data levels Section 2 5 Steps 1 15 need to be performed at the remaining Remote Sites for completion of Simulcast Tuning Receivers 2 6 AUDIO ALIGNMENT CHANNEL CONTROL LER TO FROM RNT AUDIO TO RNT 1 Make sure that a Remote Site is still setup with a Multi Net call with Audio Data Do Not start th
44. sent while the repeater powering steps are occurring This and waiting 1 2 minutes after powering the Remote Site repeater on allows the RVM in the Voter to self align stabilize 2 2 TEST EQUIPMENT REQUIRED IFR 1200 or equivalent 2 each e Oscilloscope 9 Transmission Test Set 2 each e Signal Encoder Decoder Box SED Appropriate Cables Connectors e Version 8 4 Repeater Programming Software 2 3 SIMULCAST TUNING TRANSMITTERS SETTING UP 1 Place the Channel Under Test on the Channel Con troller CC and all Remote Sites RS into Set Up State The Channel Under Test needs to remain in Set Up State for the duration of the tuning proce dure Use either Network Management click on each individual icon and pull down Repeater gt Set Up State or switch SMC switch S4 section 2 On for each component see Figure 2 7 NOTE Plan ahead as using Network Management for Set Up State needs to be reset whenever a com ponent is restarted and using the hardware switch for Set Up State needs to be physically reset for Normal State at some point 2 1 2 With Network Management set the Channel con troller SMC Audio and Data Gain to 1 0000 click on the System icon and pull down System gt Calibration gt SMC Configuration and the configuration window pops up 3 With Network Management set all Remote Site SMC Audio Gains only to 1 0000 see Step 2 4 On the Channel Controller place the SMC on an ext
45. t SMC Configura tion menu carefully start incrementing the phase of one of the two repeaters Do this in steps of two each step on the Network Management console rep resents 1 4 If Noise increases and SINAD drops go in the opposite direction If there is little differ ence return to the original setting and perform this procedure with the other repeater Do not go further than 20 units from the original setting Keep track of the positions and record the SINAD readings 8 Shut down one of the repeaters if more than one and bring up another 9 Repeat Steps 3 8 with the third repeater holding the first one steady this time PAST PROCEDURES 10 Bring up all repeaters Verify that the SINAD is at an acceptable level typically 16 dB or better If not repeat the above procedure trying Network Management phase steps of one to pin point an acceptable SINAD level in Step 7 11 Remove the IFR from the repeater and restore all repeaters to normal operation Table B 3 SMC S4 SETTINGS Section 8 Section 7 Section 6 Section 5 180 90 45 22 5 2 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 ol ol 2 1 0 1 On B 2 5 6 S4 TRANSMIT LEVEL PHASE SWITCH ES This sets the data output at a Remote Site S4 section 2 is the
46. ted 2 The Channel Controller s Timing Tone Gain is set too low 3 The repeater s threshold is set too high 1 Fix the problems that have caused the repeater to revert Unrevert the repeater Recalibrate the channel 2 Perform the alignment described in Sec tion B 1 2 3 Perform the alignment described in Sec tion B 1 2 N The repeater s threshold value is set incor rectly B 5 Perform the alignment described in Section B 1 2 May 1998 Part No 004 0690 303 PAST PROCEDURES 1 4 3 WRITE PROCEDURE Click the Write button to write the timing values to the repeaters SMCs Only repeaters that have OK icons are written If a channel has a check mark icon none of that channel s repeaters are written A flash ing icon next to the channel name indicates that writ ing is in progress An information alarm occurs as each repeater is written The Write process writes the data for all channels that display the W icon every time the Write button is clicked For example if data has been acquired for Channel X and the button is clicked the data is written to all the repeaters that show OK and are associated with Channel X If data is then acquired for Channel Y and the Write button is clicked the data is written to all the repeaters that show OK and are associated with Channels X and Y To avoid rewriting data close and reopen the Manual Calibration dialog box after click ing the Write button
47. transmitter equipped radio equipment SAFETY INFORMATION Proper operation of this radio will result in user exposure below the Occupational Safety and Health Act and Federal Communication Commission limits The information in this document is subject to change without notice Johnson Company will not be liable for any misunderstanding due to misinformation or errors found in this document LTR is a registered trademark of the E F Johnson Company IBM is a registered trademark of International Business Machines Call Guard is a registered trademark of the E Johnson Company MS DOS is a registered trademark of Microsoft VIKING is a registered trademark of the E F Johnson Company B 1 B 2 TABLE OF CONTENTS GENERAL INFORMATION SCOPE OF THE MANUAL occi E pas 1 1 WHAT IS A SIMULCAST RADIO 5 1 1 SYSTEM ELEMENTS bine EE 1 1 TUNING PROCEDURE GENERAL 333255 2 552 Sic A E 2 1 TEST EQUIPMENT 0 2 1 SIMULCAST TUNING 5 2 1 SIMULCAST THRESHOLD ALIGNMENT AND MANUAL 2 2 SIMULCAST TUNING RECEIVERS
48. ves the following steps which are detailed in Section B 1 3 1 Put all repeaters in Setup State 2 Put repeaters in SMC Standby mode B 1 3 Put Channel Controller in SMC Standby mode 4 Put repeaters in SMC Link Timing mode Ensure that the returned value is 0 zero Adjust Threshold as required 5 Put the Channel Controller in SMC Link Timing mode Ensure that the repeater is returning on zero values Adjust Timing Tone Gain as required 6 Put the repeater in SMC Normal mode 7 Put the Channel Controller in SMC Normal mode 8 Put all repeaters on the channel in Normal State 1 3 DETAILED PROCEDURE The following steps must be repeated for every channel in the system and for every repeater at all sites in the system One person is needed at the site containing repeaters one person at the site containing the Channel Controllers and one person to operate the Host Computer If equipment is collocated this may be accomplished with two people B 1 3 1 REPEATER SETUP STATE From the Host Computer put all repeaters in the system in Setup State Click on a repeater icon Select menu item Repeater gt Setup State Repeat for each repeater at each site in the system B 1 3 2 REPEATER SMC STANDBY MODE 1 At the Repeater Site connect a laptop computer to the repeater on the desired channel 2 Start the 2000pgmr software with the command 2000pgmr e This enables menu items required for ad

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