SECTION 1 - CALIBRATION 1-1 GENERAL ‘This section contains calibration procedures for the following assemblies and systems: PARA TITLE 18 POWER SUPPLY CALIBRATION 8 TCXO/OGXO CALIBRATION 8 DVM CALIBRATION a GENERATOR OUTPUT LEVEL CALIBRATION SINAD METER CALIBRATION RF GENERATE FM DEVIATION CALIBRATION RF GENERATE PM DEVIATION CALIBRATION RF GENERATE AM MODULATION CALIBRATION © RF GENERATE EXTERNAL MODULATION CALIBRATION 1 SPECTRUM ANALYZER CALIBRATION 2 MIXER NULL CALIBRATION 3 FM DEVIATION METER CALIBRATION 4 5 6 4 2 3 4 6 DIETONTION METER CALIDRATION 6 7 8 PM DEVIATION METER CALIBRATION AM MODULATION METER CALIBRATION POWER METER CALIBRATION ‘These procedures should be performed as a result of one or more of the following conditions: {© ‘It, during the course of notmal operation, the COM-1208 or any major function thereot fails to meet the performance specifications, © 11.4 module is found to be detective and requires replacement, © Ir the recommended 12 month calibration interval is due, Figu module, All procedures must be performed for the annu t-1-1 SAFETY PRECAUTIONS {As with any plece of electronic equipment, extreme caution should be taken when working with “tive” circults. When performing the calibration procedures in this section, be sure to observe the following precautions: WARNING: REMOVE ALL JEWELRY BEFORE PERFORMING ANY CALIBRATION PROCEDURES INVOLVING LIVE CIRCUITS. HEED ALL WARNINGS AND CAUTIONS CONCERNING MAXIMUM VOLTAGES AND POWER INPUTS. 1-1 lists the calibration procedures required based on the replacement of a specitic ‘ealibrat 11-1-2 ESD PRECAUTIONS CAUTION: THESE CALIBRATION PROCEDURES SHOULD ONLY BE PERFORMED IN AN ESO ENVIRONMENT AND ALL PERSONNEL PERFORMING THIE PROCEDURES. SHOULD KNOW ACCEPTED ESD PRACTICES OR BE ESD CERTIFIED. wy CAUTION wy THIS EQUIPMENT CONTAINS PARTS ‘SENSITIVE TO DAMAGE BY ELECTROSTATIC DISCHARGE (ESD) 1-2 TEST EQUIPMENT REQUIREMENTS. Table 1-1 contains a comprehensive list of test equipment suitable for performing any of the procedures listed in thie manual. Any other equipment meeting the specifications listed in ‘Table 1-1 may be substituted in place of the recommended models, NOTE: For certain procedures contained in this manual, th exceed the minimum required specifications squipment listed in Appendix A may 1-9 DISASSEMBLY REQUIREMENTS To perform the calibration procedures, the case assembly must be removed. 1-4 CALIBRATION ADJUSTMENTS Before making adjustments, always observe the measurement. If the measuroment is within the tolerances given, do not proceed with the adjustment. When an adjustment is required, attempt to obtain a preci urement, Instead of just within tolerance. 1-5 CONTROLS, CONNECTORS AND INDICATORS ‘The front and ied in the calibration 'é $-2 In the COM-1208 connectors and indicators spe: fer to Figure 1-6 COMPLETION OF CALIBRATION TEST PROCEDURES: Upon completion of a specific calibration procedure, the calibration procedure may be terminated. Control seltings, operating commands and test equipment do not carry over from ‘one procedure to another and are not assumed at the beginning of a procedure. 1-7 CALIBRATION RECORD ‘A Calibration Record Is provided for racording the results obtaines while performing the Calibration Procedures. it ie recommended the technician reproduce tne Calibration Record, rather than use the copy in this manualType Mode! Digital Multimeter (OMM) HP34401A or equivalent Calibrator Fluke 51008 oF equivalent ‘Audio Analyzer HP99098 oF equivalent Frequency Rang: 20. Hy to 20 He Accuracy 20.1 dB Frequency Counter Phittps PMeoos ‘of equivalent Frequency TOHs to 1.9 GHe Resolution 27 digits Measuring Receiver HP8902A (opt. 30, 32, 37) for equivalent RF Power: -20't0 +20 dam RF Power Range. to | GHz RF Level: Tuned 0 10 -127 48m RF Power Accuracy. 30.108 ‘Measuring Receiver Sensor HP11722A oF equivalent ‘Modulation Analyzer HP9901A or equiv: FM Meter Range: 20 Hz to 200 kH2 FM Motor Accuracy’ 1% 41 digit 25% 11 digit 10 Mite Stancard Accuracy: 22K 10% (Traceable to NIST) (COM-120 Maintenance Kit PIN 7001-8743-800 Signal Generator HP8B5TA or equivalent ‘Amplifier Research Gain: ‘ow 1000 140 JB Nominal owl Ampliies or equivalent eandwiatn MHZ to 1 GHz ENI 51001 oF equivalent Gain: '50 dB Nominal Banewiath 1.5 to 150 MHZ Table 1-1 Test Equipment Requirements vaWBLBN WaMOd Nolwwar¥o 18416 ouvusnvo uaa souvANGOW ny 1845, ‘WBLBW NOUMIAQ Wd Nowyuenvo eu ‘HSISWY NOLLMIASO Wis Nowyeervo va Nowvearvo THAW HBX 1812 waz) Nomwuarnvo WNY WMLO3ES ven Nolwnnaow a Nouwaarvo 190 BUVENSO 3 N NOLLWUEFWS {OuINGON Wy BAVUaNaO 4 199 Nouvaervo NOUWIASO We BiveaNaD Ju 108 NOLLWuerTvo ROUWINZO Ws BAVEBNO tu ad Nouwwarvo UaLaW OWNS 198 ala NoWMOIsIO ouwuervo 125 BAM Nain Nowweervo 184 YOLVUBNIO Nowvuervo NAG 89 nowwuareo ‘OxOO'0xOL, 192 AlaaNs UaMOd NowwuarWo 184 THE FOLLOWING ‘CALIBRATION J PROCEDURES MUST BE PERFORMED lr wens ASSEMBLY 15 REPAIRED OR REPLACED WOTHERBOARD PC BOARD ASSEMBLY FRONT PANEL ASSEMBLY DIGITAL TRAY "ATTENUATOR CONTROL PC BOARD ASSEMBLY ‘CONTROLLER TRAY “ANALYZER TRAY RECEIVER TRAY ‘SYNTHESIZER TRAY ‘GENERATOR TRAY POWER TERMINATION ASSEMBLY ‘GENERATOR OUTPUT ASSEMLY “CONVERTER ASSEMBLY REFERENCE FREQUENCY ASSEMBLY FAN ASSEMBLY ‘POWER SUPPLY ASSEMBLY Module Replacement and Calibration Requirements Figure 1-1CALIBRATION PROCEDURES POWER SUPPLY CALIBRATION PREREQUISITES: Nowe EQUIPMENT REQUIRED: 1 DIGITAL MULTINETER (oMM) FIGURES: 12 sver proceoure 1. Apply Power to COM-1208, Allow 90 minute warm-up period, 2. Verity Voltages at Motherboard Connector 87AGJ10 per Table 1-2 using DMM. Refer to Figure 1-2 for pin locations. Use Chassis for ground, Supply voltage Location way saver (2025) | a7Asut0 PIN.19, sy | eas deve vy a7assiorin asa | “10.5 10.5 vac (0.5 vy | e7A6sIO PIN 3.18 +105 #1045 vde (0.25 v)_|_@7ABII0 PIN 4.16, 45 V Analog 45 Va (40.2 v0.0 v) | @7AGI10 PIN 5,17 +8V Digital #5. ¥de (40.2 vi0.0 vy | A7ABIIOPIN 7.19 wevel +12 vue (20.25 ¥) | e7Aest0 PIN 9,21 Table 1-2 Power Supply Voltages and Locations 8. Set COM-1208 to OFF and disconne: est equipment. 15a7agsn0 Figure 1-2 Power Supply Voltage Locations (8706510)1-8-2 TCXO/OCXO CALIBRATION PREREQUISITES: 1 1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 FREQUENCY COUNTER FIGURES: 13 STEP. PROCEDURE 4. Apply Power to COM:120B. Allow § minute warm-up period. 2. Connect Frequency Counter to AUX FF OUT Connector (13). 3. Press GEN Test Mode Key (3) to access RF Generate Operation Scr 4. Sot RF Field to 998.0000 Miz 5. Sot Output to AUX and Output Level to -19 48m. 6. Set all Modulation Sources to OFF. 7. WOCKO is installed, go to Step 10. 8. Verity Frequency Counter reads 999.0000 (2199.6 Hz). Adjust B7A1GAIRI as required (Figure 1-3) 9. Set COM-1208 Power to OFF and disconnect test equipment 10. I OCXO is installed, verity Frequency Counter reads 998.0000 (10 Hz). If not, go to Stop 12, 11, Set COM-1208 Power to OFF and disconnect test equipment. 12, Remove Protectod Serew from OCXO to access adjustment, Adjust OCXO unti! Frequency Counter reads 998.0000 (+10 Ha). 18, Replace Protected Screw, set COM-1208 Power to OFF and disconnect t ‘equipment.MM onasenae Figure 1-8 TCXOIOGXO Adjustments 81-8-3 DVM CALIBRATION STEP 10. 4" PREREQUISITES: 1-6-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 CALIBRATOR FIGURES: NONE PROCEDURE Apply Power to COM-1208. Allow § minute warm up periods Connect Calibrator to SCOPE/DVM Connector (20) Pross MTRS Instrumente Key (4) Select “3. DVM" on Moters Menu, Set Peak Hold to OFF. Set Average to OFF. Set Source to Sc/DVM AC. Set me Reading Units to Vrms. Set Range as shown in Table 1-3. For each Range setting, set Calibrator for stated input. Verily Meter Reading matches input within specified tolerance. If not, go to Step 13, Range Frequency nce 200 V 50 He 20 19 vems 1 kee av 1.9 vem 20 KHz 4108 mv Table 1-3 SC/DVM AG Range Settings Sot Source to SC/DVM De. ‘Set Range as shown in Table 1-4. For each Range setting, set Calibrator or stated input, Verily Meter Reading matches input within specified tolerance. If not, go to Stop 13 Range Calibrator Input 200 190 vee 20V 19 vae 2 1.9 voe 2106 av Table 1-4 SC/DVM DG Range Settings 19STEP PROCEDURE 12, Set COM-1208 to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 19, Press SETUP MEMORY Key (21) 14, Solect “1, Calibration” rom Setup Screen 15, Press ENTER Key to access Password Field, Presa GHIFT, FM, ¥, 6, VC, Dang SHIFT Data Entry Keys (5). Press ENTER Key 16, Select “1. OVI" fo access DVM METER CALIBRATION Screen, 17. Move cursor to AG RANGE X1 18. Set Calibrator to 4.000 Vis at 60 Hz 19. Press ENTER Key twice and walt until current Field displays CALIBRATED. 20. Move cursor to AG RANGE X%0. 21. Set Calibrator to 10.00 Vrms at 60 Hz 22, Prose ENTER Key twice and walt until current Field éisplays CALIBRATED. 25, Move cursor to AG RANGE X100. 24, Set Calibrator to 100.0 Vims at 60 Hz 25. Press ENTER Key twice and walt until current Field displays CALIBRATED. 26. Move cursor to OC RANGE Xt 27. Set Calibrator to 2.000 Vée. 28. Press ENTER Key twice and wait until current Field éisplays CALIBRATED. 29, Press RETURN Soft Function Key F6. 30. Pross MTRS Instruments Key (4). 31, Select “3, DVM" on Meters Monw. 92, Proceed at Step 7. 1-101-8-4 GENERATOR OUTPUT LEVEL CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 MEASURING RECEIVER FIGURES NONE STEP PROCEDURE 1. Apply Power to COM-120B, Allow & minute warm wp poriod. 2. Press GEN Test Mode Key (9) to access RF Generate Operation Sereen. 3. Set RF Field to 405.5000 MHz, 4. Sot all Modulation Sources to OFF. 5. Set Output to 7/ and connect Measuting Receiver to T/R Connector. Set Measuring leceiver for Automatic Tuning and Tuned RF Level Measurement. 6. Set Output Level to -20 dBm. Verity Measuring Receiver reads -20 dBm (22 JB). not, 90 t0 Stop 14 7. Set Output Level to -90 dBm. Verity M jor reads -90 dBm (£2 4B). It no, 90 10 Step 14 suring Fes 8. Set Output Level to -130 dBm. Verity Measuring Receiver reads -190 dBm (42.5 d8). If not, go to Step 14. ‘8. Sot Output to AUX and connect Measuring Recelver to AUX RF OUT Connector (13), 10. Set Output Level to -20 dBm. Verity Mi 90 to Step 14, ing Receiver reads -20 dBm (=2 dB), 11 not, 11, Sot Output Level te -90 dBm. Verity Measuring Receiver reads -90 dBm (+2 4B). If not, 90 t0 Step 14, 12, Set Output Level to -130 dBm. Verity Measuring Receiver reads -190 dBm (22.6 dB). If rot, go to Step 14, 43, Set COM-1208 to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 14, Press SETUP MEMORY Key (21). 18, Select “1, Caliration” trom Setup Sersen. 16. Press ENTER Key fo access Password Field. Pross SHIFT, F, M, Y,S, V, ©, D and SHIFT Data Entry Keys (5). Press ENTER Key. 17, Select “6. RF GENERATOR - OUTPUT LEVEL" to access RF GENERATOR LEVEL CALIBRATION Sereon enster. 18. 20. a 22, 23. 26. 25, 26, 27. 28. 29, 20. 3 92, a 34 36, 36 m7, 38 PROCEDURE Press LEVEL Sott Function Key F2, if displayed Connect Measuring Receiver to T/R Connecter. Move cursor to -20 dBm Field. Press ENTER Key to access Data Field. Eait Data Field using DATA SCROLL Keys (17) for Measuring Receiver roading closest to 20 68m, Press ENTER Key and walt until -20 dBm Field displays CALIBRATED. Move cursor to -22 dBm Field. Pross ENTER Key to access Data Field. Eait Data Field using DATA SCROLL Keys (17) for Measuring Receiver reading closest to 22 dBm. Pross ENTER Key and walt until -22 dBm Field displays CALIBRATED. Move cursor to -24 dm Field. Press ENTER Key to access Data Field Edit Data Field using DATA SCROLL Keys (17) for Measuring Receiver reading closest to "24'dBm, CALIBRATED. Pross ENTER Koy and wait until -24 dBm Fiold display Move cursor to -26 dBm Fiold. Pross ENTER Key to access Data Field. Eait Data Field using DATA SCROLL Keys (17) for Measuring Receiver reading closest to 25 dBm. Pross ENTER Key and wail until -26 dBm Field displays CALIBRATED. Move cursor to -28 dBm Field. Press ENTER Key to access Data Field Edit Data Fi "28'd8m. id using DATA SCROLL Keys (17) for Measuring Receiver reading closest to Pross ENTER Key and wait until -28 dBm Field displays CALIBRATED. Move cursor to -20.9 dim Field. Press ENTER Key to accose Data Field alt Data Field using DATA SCROLL Keys (17) for Measuring Receiver reading closest to 20.9 40m, Prose ENTER Key and wait unti -29.9 dBm Flold displays CALIBRATED. Pross T/R Soft Function Key F3. Sot Measuring Receiver for RF Power Measurement,see PROCEDURE 39. Access each Data Fi Perform following: 1d for frequencies 0.2500 to 998.9899 MHz. For each Data Field © ross ENTER Key fo access Data Fieta © Edit Data Field using DATA SCROLL Keys (17) for Measuring Receiver reading losest t0 -20 dBm © Prose ENTER Key and wait unl currant Field dleplays CALIBRATED, © Continue with next Field 40. Press AUX Soft Function Key FA, 41, Connect Measuring Receiver to AUX RF OUT Connector (13) 42, Access each Data Field for frequencies 0.2500 to 998.9989 MHz, For perform following (© Press ENTER Key to access Data Field © Edit Data Field using DATA SCROLL Keys (17) for Measuring Rect closest to -13 dBm. 18 ENTER Key and walt until current Field dieplays CALIBRATED. © Continue with noxt Field 43. If Optional Amplifier is installeg, press AUX AMP Soft Function Key FS. 44, Access each Data Field for 1requencies 0.2500 to 999.0999 MHz. For each Data Fi perform following (© Pross ENTER Key to access Data Field, (© Edit Data Field using DATA SCROLL Keys (17) for Measuring Receiver Closest to 0.0 dBm sading (© Pros ENTER Key and wait until current Field displays CALIBRATED. © Continue with next Feta 45 Prass RETURN Soft Function Koy F6. 46, Press GEN Test Mode Key (3) 47. Continue at Step 2.1-8-5 DISTORTION METER CALIBRATION PREREQUISITES 1-8-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 AUDIO ANALYZER FIGURES, 14 ‘com-1208 AUDIO ANALYZER ca) 0a, AUDIOWDATAIN, AUDIODATAGEN HIGH mPEDANCE nur Figure 1-4 Distortion/SINAD Meter Test Equipment Setup STEP PROCEOURE 1. Apply Power to COM-1208. Allow § minute warm-up ps Gonnect Test Equipment as shown In Figure 1-4 Pross AUDIO GEN Instruments Key (4) 4. Set Audio Generator 2 to ON. 5. If Optional Audio Generator 2 is installed, set Tone Frequency for 1000.0 Hz and Shape to SINE. 6. Set Aucio Generator 2 Level for 41 Vp. 7. Set Audio Generator + 10 OM. 8. Set Audio Generator 1 Format to TONE. 9, Set Aucio Generator + Tone Frequency to 2600.0 He. 10, Set Ausio Generator 1 Shape to SINE. 11, Set Aucio Generator 1 Level to 0.14 Vp. 12, Set Audie Generator 1 Mode to CONT.STEP PROCEDURE 18. Set Audio Analyzer to measure Distortion with all fters of. 14. Verity Audio Analyzer reads approximately 10% Distortion, 15, Press MTRS Instruments Key (4) 16, Soleet Distortion Meter Operation 17. Sot Distortion Motor Source to AUDIO/DATA-IN. 18. Set Peak Hold to OFF. 10 20, Set Low-Pass Filter to 20 kHz 21. Verity Distortion Meter Reading matches Audio Analyzer (20.6%). 1f not, go to Step 29, 22, Set COM-120B Power to OFF and disconnect test equipment, PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 28, Set Audio Generator 2 for 1.41 Vp. 24, Set Audio Generator 1 for 0.14 Vp. 25. Press SETUP MEMORY Key (21) 26. Select “1. Calibration” from Setup Screen, 27. Press ENTER Key to access Password Field. Press SHIFT, FM, Y, S, V, C, O and SHIFT Data Entry Keys (5). Press ENTER Key. 28, Select "2. DISTORTION METER" to access DISTORTION METER CALIBRATION Screen. 29. Enter Audio Analyzer Reading using DATA ENTRY Keys (5). Press ENTER Key 30. Goto Stop 15. 451-8-6 SINAD METER CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 AUDIO ANALYZER FIGURES: 14 ster PROCEDURE 1. Apply Power to COM-1208. 2. Connect Test Equipment as shown in Figure 1-4 3. Press AUDIO GEN Instruments Key (4). 4. Set Audio Generator 2 to OW. 5. If Optional Auio Generator 2 is installed, sot Tone Frequency for 1000.0 Hz and Shape to SINE, 6, Set Audio Generator 2 Le Hor 1.41 vp. 7. Set Audio Generator 1 10 ON. 8. Set Audio Generator 1 Format to TONE. 8. Set Audio Generator 1 Tone Frequency to 2600.0 Hs. 10. ‘Set Audio Generator 1 Shape to SINE. 11. Set Audio Generator + Level to 0.14 Vp. 12. Set Audio Generator 1 Mode to CONT. 18. Set Audio Analyzer to measure SINAD with filters of 14. Verity Audio Analyzer 1d8 approximately 20 48 SINAD. 15. Prose MRS instruments Key (4). 16. Select SINAD Meter Oper 17, Sot SINAD Me 18, Set Peak Hold to OFF. Source to AUDIO/DATA-IN. 19, Sot Average to OFF, 20, Set Low-Pase Filter to 20 ks. 21. Verily SINAD Meter Reading matches Augio Analyzer (21.1 dB). If not, go to Step 22, 22. Set COM-120B Power fo OFF and disconnect test equipmentster PROCEDURE PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 23, Sot Audio Generator 2 for 41 vp. 24, Set Audio Generator 1 tor 0.14 Vp. 25, Prose SETUP MEMORY Key (21). DR Salnct “1 Calibration” tram Setup Sereen, 27. Press ENTER Key to accoss Password Field. Pross SHIFT, F, M, Y, 8, V, C, D and SHIFT Data Entry Koys (5). Pross ENTER Key, 28, Solect “3. SINAD METER" to access SINAD METER CALIBRATION Screen. 29, Enter Audio Analyzer Reading using Data Entry Keys (5). Press ENTER Key. 30, Goto Step 15.1-8-7 RE GENERATE FM DEVIATION CALIBRATION PREREQUISITES: 1-0-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 MODULATION ANALYZER FIGURES. NONE ster PROCEDURE 1. Apply Power lo COM-1208, Allow 5 ininule waten-up period. 2. Connect T/A Connector (12) to Modulation Analyzer Input 3. Press GEN Test Mode Key (3) to access RF Generate Operation Screen 4. Set RF Field to 107.0000 Miz. 5, Set Output to 7/R and Output Level to -20.0 dBm. 7. Set Modulation Analyzer to 101 MHz RF. Sot Modulation Analyzer for 3 kHz Low-Pase Filter, Peakt ang FM Measurement. Record Residual on Modulation Analyzer. 8. Set GENT Modulation Type for FM. 9. Sot Deviation for 10.0 kee 10. Set Format for TONE, With Cursor on Format, pross CONT Soft Function Key F2. 11, Set Tone Freg for 10.0 He 12, Set Shape to SINE. 10, Verity Modulation Analyzer ret ‘90 to Step 45. 13 10 kHz Deviation (1600 Hz + residual [Step 7}). If not, 14, Engage 800 Hz High-Pass Filter on Modulation Analyzer. 15. Sot GENT Modulation Type to OFF. Record Residual on Modulation Anaiyz0r 16. Set GENI Modulation Type to FM. 17. Set Tone Frog 10 10 18. Verity Modulation Analyzer reads 10 kHz Deviation (2600 Hz + residual [Step 15). {f not, go to Stop 45, to 20 kez, 18. Set Modulation Analyzer Low-Pass Fil 20. Set GEN1 Modulation Type to OFF. Record Residual on Modulation Analyzer 21. Set GENT Modulation Type to FM.ster PRoceDURE 22, Set Tone Freq to 10000.0 He. 23, Verily Modulation Analyzer reads 10 kHz Deviation (2600 Hz + residual [Stop 20}), If not, 90 10 Step 45, 24, Sot Tone Freq to 15000.0 Hz. 28. Verity Modulation Analyzer reads 10 kH2 Deviation (4600 Hz + residual [Step 20). I not, go 10 Stop 45, 26, Set Modulation Analyzer High-Pass Filler to NONE and Low-Pass Filler to 3 kHz 27. Set GEN Modulation Type to OFF, Record Residual on Modulation Analyzer 28. Sot GEN1 Modulation Type to FA 29. Set Tone Freg to 10.0 He. 30, Set Deviation for 100.0 kis. 31. Verity Modulation Analyzer reads 100 kH2 Deviation (45.6 kHz + residual [Step 27]). If not, go to Step 45, 82. Set Modulation Analyzer High-Pass Filter to 300 H2, Residual on Modulation Analyzer. 98. Set GEN1 Modulation Type to OFF, Recor 34. Set GEN Modulation Type to FM. 35. Set Tone Freq to 1000.0 Hs. 86. Verlly Modulation Analyzer reads 100 kHz Deviation (45.6 kHz + not, go 10 Step 45; idual [Step 33). It 37. Set Modulation Analyzer Low-Pass Fliter to 20 kHz 88. Set GEN1 Modulation Type to OFF. Record Residual on Modulation Analyzer. 88. Sot GEN Modulation Type to FM. 40, Set Tone Freq to 10 kHz 41. Verity Modulation Analyzer reade 100 kH2 Dovistion (28.6 kM + rosidual (Stop 20)). If not, go 10 Step 45, 42. Set Tone Freq to 75000.0 Hz. 48. Verity Modulation Analyzer reads 100 kHz Deviation (45.5 kHz + residual [Step 26)). If not, go 10 Step 45, 44. Set COM-1208 power to OFF and disconnect test equipment.ster. pRoceDuRE PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 45, Set Modulation Analyzer for 300 Hz High-Pass Filler and 5 kHz Low: Pass Filter. 40, Press SETUP MEMORY Key (21). 47. Select “1. Calibration” trom Setup Screen. 49, Proce ENTER Key to accote Paceword Field. Proce SHIFT, F, M, Y, 8 Vy C, D and SHIFT Data Entry Keys (5). Press ENTER Key 49. Select *7. RF GENERATOR - FM DEVIATION" to access RF GENERATOR - FM DEVIATION CALIBRATION Screen ‘50. With cursor on “FM DEVIATION 50 kHz,” press ENTER Key. ‘51, Edit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 50 KHz Deviation. 52. Pross ENTER Key and walt unt Field digplays CALIBRATED. 153, With cursor on "FM DEVIATION 16 kHz,” press ENTER Key 54, Edit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 15 kHz Deviation. 55. Prose ENTER Key and wail until Field dieplays CALIBRATED. 556. With cursor on “FM DEVIATION 10 kHz," pross ENTER Key. 57. Edit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 10 kez Deviation 58. P 3 CALIBRATED. ile displ ENTER Key and wait until ‘59. With cursor on “FM DEVIATION 1 kHz," press ENTER Key. 60. Edit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 1 kHz Deviation, 61. Pross ENTER Key and wait until Field displays CALIBRATED, 62, Repost etepe 60 through 61 thon go to Stop 62 63. Pross RETURN Soft Function Key F6 to return fo Calibration Ser n. Go to Step 2.1-8-8 RF GENERATE PM DEVIATION CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 MODULATION ANALYZER FIGURES: Nowe ster PROCEDURE 1. Apply Power @ COM-1208._ Allow 5 minute warm-up perio. 2, Conneet T/R Connector (12) to Modulation Analyzer Input 8. Press GEN Test Mode Key (3) to access AF Generate Operation Ser 4. Set RF Field to 101.0000 Mix. 5. Set Output to T/A and Output Level to -20.0 dBm. 6. Set All Modulation Sources to OFF. 7. Set Modulation Analyzer for 101 MHz RF. Set Modulation Analyzer fot 20 kHz Low-Pass Fitter, 800 Hz High-Pass Filter, Peak+ and PM Measurement. Record Residual on Modulation Analyzer 8. Sot GEN1 Modulation Type for Pat 9. Set Deviation for 8.0 Red. 10, Set Format for TONE. With Cursor on Format, pross CONT Soft Function Key F2. 11, Set Tone Freq for $000.0 Hz. 12. Set Shape to SINE, 13, Verity Modulation Analyzer roads @ Radian Deviation (20.5 Radians + residual (Step 7) Wnot, go to Step 15. 14, Set COM-1208 power to OFF and disconnect test equipment PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 15. Press SETUP MEMORY Key (21) 16. Select “1, Calioration” from Setup Screen, 14. Press SHIFT, F, MY, S, V, C, D and SHIFT 17. Press ENTER Koy to accoss Password Data Entry Keys (6). Press ENTER Key 18, Set Modulation Analyzer for 800 Hz High-Pass Filler and 3 kHz Low-Pass Filter 18. Solect "8. RF GENERATOR - PM DEVIATION" to accost RF GENERATOR - PM DEVIATION CALIBRATION Ser vetSTEP 20. a 22, 2a, 2a 2s. 26. 27, 28, 29, 1-22 PROCEDURE With cursor on “PM DEVIATION 15 RAD,” press ENTER Key. Egit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 15 Radians, Proce ENTER Key and wait until Field displays CALIBRATED. With cursor on “PM DEVIATION 10 RAD," pross ENTER Key Edit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 1 Radians: Press ENTER Key and wait until Field displays CALIBRATED. With cursor on “PM DEVIATION 1 RAD," pross ENTER Key. Edit Data Field using DATA SCROLL Keys (17) for Modulation Analyzer reading closest to 1 Radian. Press ENTER Key and wait until Field displays CALIBRATED. Press RETURN Soft Function Key F6 to return to Calibration Screen. Go to Step 31-8-9 RF GENERATE AM MODULATION CALIBRATION PREREQUISITES: 1-0-1 POWER SUPPLY CALIBRATION EQUIPMENT REQUIRED: 1 MODULATION ANALYZER FIGURES: NONE ster PROCEDURE 1. Apply Power te COM-120B. Allow 6 minute warm up period 2. Gonnset T/R Connector (12) to Modulation Analyzer Input 3. Press GEN Test Mode Key (3) to access AF Generate Operation Ser 4. Set RF Field to 101.0000 maz. 5. Set Oulput to T/A and Output Level to -20 dBm, 6, Set All Mogulation Sources to OFF. 7. Set Modulation Analyzer for 101 MHz RF. Set Modulation Analyzer for 9 kHz Low-Pass. $ Filter, Peaks and AM Measurement. Record Residual on Modulation Analyzer, 8. Set GEN1 Modulation Type for AM 9. Set Modulation for 30% 10. Set Format for TONE. With Cursor on Format, pross CONT Solt Function Koy F2. 11, Set Tone Freq for 1000.0 Hs. 42, Set Shape to SINE. 13. Verity Modulation Analyzer reads 30% Modul Stop 24 ion (26% + residual [Step 7). If not, goto 14, Set Modulation to 50%. 15. Verify Modulation Analyzer reads 50% Modulation (6% + residual [Step 71). H not, go to Step 21 16. Get Modulation to 70% 17. Verily Modulation Analyzer reads 70% Modulation (26% + residual [Step 7}). If not, goto Step 27 18, Set Modulation to 90%. 18. Verity Modulation Analyzer reads 90% Modulation (26% + residual [Step 7)). If not, go te Step 21ster PROCEOURE 20. Set COM-1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 21. Set Modulation Analyzer for 300 Hz High-Pass Filter and 3 kHz Low-Pass Filter. 22. Press SETUP MEMORY Key (21). 29, Select “1, Cate jon" Hom Selup Screen. 24. Press ENTER Key to access Password Field. Press SHIFT, F,M, Y, S, V, C, D and SHIFT Data Entry Keys (5). Press ENTER Key, 25, Select “9. RE GENERATOR - AM MODULATION" to access RF GENERATOR - AM MODULATION CALIBRATION Scrat © ENTER Key. Edit Data Field using DATA SCROLL Keys (17) for Modul /eading closest 10 70% Modulation 26, 27. Prose ENTER Key and wait until Field displays CALIBRATED. 28, Press RETURN Solt Function Key F6 to return to Calibration Screen. Go to Stop 3. 4241-8-10 RF GENERATE EXTERNAL MODULATION CALIBRATION PREREQUISITES. 1-8-1 POWER SUPPLY CALIBRATION 1-8-7 RF GENERATE FM DEVIATION CALIBRA 1-8-8 RF GENERATE PM DEVIATION CALIBRATION, 189 RF GENERATE AM MODULATION CALIBRATION EQUIPMENT REQUIRED: 1 AUDIO ANALYZER 1 MODULATION ANALYZER FIGURES: 18 ‘AUDIO ANALYZER ‘com MooULATION. 208 ‘ANALYZER (92 HGH IMPEDANCE xr Moo a eur oureur Figure 1-8 External Modulation Calibration Setup Ter PROCEOURE 1. Apply Power to COM-1208, Allow 5 minute warm-up period. 2. Connect Test Equipment as shown in Figure 1-5 8. Press GEN Test Mode Key (3) to access AF Generate Operation Screen 4. Set RF Flold to 107.0000 mts. 5, Sot Output to T/R and Output Level to -20 dBm. 6. Set All Modulation Sources to OFF: 1. Set Modulation Analyzer for 3 kHz Low-Pags Filter, 300 Hz High-Pass Filte Measurement, Peaks and AM 8. Set EXT Modulation Type for AM. 8. Set Ausio Analyzer for 1 kH2 tone at approximately 6.667 Vems output, Adjust Audio Analyzer for Modulation Analyzer reading of 80%.STEP PROCEDURE 10. Verity COM-1208 Modulation Reading is 80% (210%). 11 not, go to Step 32 11, Set EXT Modulation Type for FM. Set Modulation Analyzer for FM Measurement. 12, Sot Deviation Range for NAR 19, Adjust Audio Analyzer for Modulation Analyzer reading of 16 KHz 14, Verity COM-1208 Modulation Reauing is 10 hie (31.0 KH2). Hl, yo to Step 92. 15. Set Deviation Range for NAR 2 16. Adjust Ausio Analyzer for Modulation Analyzer reading of 8 KHz. 17. Verity COM-1208 Modulation Reading is 8 kHz (20.8 KHz). If not, go to Step 92. 18, Set Deviation Range for NAR 3. 19, Adjust Audio Analyzer for Modulation Analyzer reading of 1.55 kHz, 20. Verify GOM-1208 Modulation Reading is 1.56 KHz (20.186 kHz). If not, go to Step 22. 21. Set Deviation Range for WIDE. 22, Adjust Audio Analyzer for Modulation Analyzer ding of 80 kHz 28. Verify COM-1208 Modulation Reading is 80 kHz (8 kHz). II not, go to Step 92. 24, Sot EXT Modulation Type for PM. Set Modulation Analyzer for PM Measurement. 25. Set Deviation Rango for NAR 1. 26. Verify COM-1208 Modulation Reading is 16 Radians (21.6 Radians). If not, go to Step 92. 27. Set Deviation Range for NAR 2. 28. Verily COM-1208 Modulation Reading is 8 Radians (£0.8 Radians). If at, go to Step 32. 29, Set Deviation Range for NAR 3. 20, Verily COM-1208 Modulation Reading is 1.56 Radlans (40.185 Radians). I not, go to Stop 2, 31, Sot COM-1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 82, Press SETUP MEMORY Key (21). 29, Select “I. Calibration” trom Setup Sereenster. PROCEDURE 1d. Press SHIFT, F, M, Y, S, ¥, C, D and SHIFT 34. Press ENTER Koy to access Password Fi Data Entry Keys (5). Prose ENTER Key 85. Select “10. RF GENERATOR - EXTERNAL MODULATION" and prees ENTER to access EXTERNAL MODULATION CALIBRATION SCREEN. 86, Cursor to EXTERNAL MODULATION Field and press ENTER, 97, Scroll to AM. Press ENTER, 388, Set Audio Analyzer 1 kHlz tone to approximately 5.8 Vems tor 80% Modulation on the Modulation Analyzer. Adjust Audio Analyzer output as required. 89. Cursor to MEASURED MODULATION Field and press ENTER, 40. Use DATA ENTRY Keypad to enter Modulation Analyzer reading. 41, Press ENTER Key and wait until Field displays CALIBRATED, 42, Cursor to EXTERNAL MODULATION Field and press ENTER, 43. Scroll to FM NARR 1. Prose ENTER. 44, Sot Audio Analyzer 1 kHz tone to approximately 5.45 Vrme for 15 kHz Deviation on the Modulation Analyzer. Adjust Audio Analyzer output as required, 45, Cursor to MEASURED DEVIATION Field and press ENTER, 46. Use DATA ENTRY Keypad to enter Modulation Analyzer reading. until Fielé dleplays CALIBRATED. 47, ross ENTER Key and w 48, Repeat Stops 43 through 47 for the remaining FM calibrations using this table as a guide: Deviation Audio Modulation | Range (kHz) | Analyzer (cvrms) FM NARR 2 10 7.20 FM NARA 3 1 3.68 FM WIDE 50 3.66 49. Cursor to EXTERNAL MODULATION Field and press ENTER, 50. Scroll to PM NARA 1. Press ENTER. 51. Set Audio Analyzor 1 kHz tone to approximately 5.45 Vims for 15 lad Deviation on the Modulation Anaiyzer. ‘Adjust Ausio Analyzer output ae required.STEP. PROCEDURE, 52, Cursor to MEASURED DEVIATION Field and pross ENTER. 58. Use DATA ENTRY Keypad to enter Modulation Analyzer roading. 54. Press ENTER Key and wail until Flold displ ys CALIBRATED. 55. Repeat Steps 81 through 84 for the remaining PM calibrations using this table as a guide: PM NARR 2 10 7.20 PM NARR 3 1 3.66 56. Disconnect coarial cable from EXT MOD IN Connector, 57. Perform procedures in para 1 3-7 through ps 0 until no adjustments are requires. 58. Set COM-120B power to OFF and disconnect test equipment,1-8-11 SPECTRUM ANALYZER CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION "8:2 TOXO/OGXO CALIBRATION COM-1208 MAINTENANCE KIT DIGITAL MULTIMETER (DMM) SIGNAL GENERATOR, EQUIPMENT REQUIRED: FIGURES: svasztrara erases rasan Figure 1 ‘Analyzor Tray Calibration Pointe STEP PROCEDURE 1. Apply Power to COM-1208. Allow 5 minute warm-up period. 2, Press ANLYZ Instruments Key (4) 19 access Spectrum Analyzer Ope! 8. Set Spectrum Analyzer Fields as follows: ‘Scan Width 1 kde Logarithmic Func apm Tracking Generator = OFF Moa UWE Attenuation op Rr input ANT Scale 10.8 Conter Frequency 100.0000 mz 4. Verily top of screen is -80 dBm. If not, move cursor to Reterence, Press ENTER Key. Press DATA SCROLL Keys (17) until -30 dBm is top of screen, Press ENTER Key, 5. Disconnect W24 from B7A12d1 (Figure 1-6)15. 16. Ww. 18, 20, a 22, 2, 24, 25. PROCEDURE Connect Signal Generator to 87A12J1 (Figure 1-6). Set Signal Generator for 10.7 MHZ signal at -20-d8m Measure de vol 1.4 Vée on DMM at B7A12TP202 (Figure 1-6). Adjust Signat Generator Output for Cursor to Conter Frequency, press Set Ref Soft Function Key F1. Note Trace peak level. Disconnect Gignal Generator fram O7A12U1 {Figure 1-6). Connoot W24 to O7AI2I1 (Figure 18) Set Signal Generator for 100 MHz at -40 dBm. Connect Signal Generator to ANTENNA Connector (7), Verify Trace peak level matches coference lovel {rom Step 8 (22 dBm). Adjust 87A12R113 (Figure 1-6) as required. Labeled as Analyzer IF Gain. With Cursor on Genter Frequency, press Set Rot Soft Function Key F' Set Scan Width to 100 kHz, Note Signal Level. Set Scan Width to 10 MHz, 500 kHz, 10 kHz and 1 kHz. Verity Signal Level matche: Reference (Step 12) for each Scan Width setting (+2 dB). I in tolerance, go to Step 32. PERFORM STEPS 15 THROUGH 32 ONLY WHEN REQUIRED. ‘Set COM-1208 Main Power Switch to OFF Disconnect coaxial cables from Analyzer Tray. Remove Analyzer Tray trom COM-120B. Install Analyzer Tray Extender Card in COM-120B. Install Analyzer Tray on Analyzer Tray Extender Card, coaxial cables using SMB-SMB Tray. Conneet Extender Coaxial Cables to Analyzer Tr ‘adapters. Install Extender Coaxial Gables to Analy2: ‘Set COM-1208 Main Power Switch {0 ON. Apply Power 10 COM-1208. Allow 5 minute warmup period, Press ANLYZ Instruments Key (4) to access Spectrum Analyzer Operation Screen. ‘Set Sean Width to 100 kHz. Note Signal Love ‘Set Scan Width to 500 kHz. Verity Signal Level matches Reference (Step 21) (#2 4B) ‘Adjust B7A12R221 as necessary (Figure 1-7) Set Sean Width to 10 kHz. Verity Signal Levé Adjust O7A1ZR254 as necessary (Figure 1-7), ‘Sot Scan Width to 1 kHz. Verity Signal Level matches Reference (Step 21) (42 48}. Adjust 87A12A286 as necessary (Figure 1-7) ‘Set Scan Width to 10 MHz, Note Signal Level.(ee Here se me a a ps “Ue 3 a One eo ° oe ‘te ho soot s7arznaso— a7ataRas B7ALZAIIS il oo i a evasenans Figure 1-7 Extended Analyzer Tray Calibration PointsSTEP. 26. 27. 28. 29, 20. a 22 33 a4 36. 36, 97, 38, 39 40. 4“ 42, 43, 4 45, PROCEDURE ‘Sot COM-1208 Main Power Switch to OFF. Disconnect coaxial eables trom Analyzer Tray. Remove Analyzer Tray from Analyzer Tray Extender Card. Remove Analyzer Tray Extender ‘Card trom COM-1208. Install Analyzer Tray in COM-1208, \dor Coaxial Cables and SMB-SMB Adapters trom Analyzer Tray coaxial jeer Tray Coaxial Cablea to Analyeer Tray. Fomove Ext Set COM-1208 Main Power Switch to ON. Apply Power to COM-120B. Allow 5 minute warm-up period. Press ANLYZ Instruments Key (4) to access Spectrum Analyzer Operation Screen. Goto Step 13. Set Soan Width to 100 kHz. ‘Stop Signal Generator trom -30 to -90 dBm. Vorily each 10 dB stop decreases signal peak 10 8 (22 dB) from provious step. Use -40 dBm as reterence. it In tolerance, go to Slop 50, PERFORM STEPS 35 THROUGH 49 ONLY WHEN REQUIRED, Set COM-1208 Main Power Switch to OFF. Disconnect coaxlal cables from Analyzer Tray. Remove Analyzer Tray from GOM-1208. Install Analyzer Tray Extender Cacd in COM-120B.. Install Analyzer Tray on Analyzer Tray Extender Card, Connect Extender Coaxial Cables to Analyzer Tray coaxial cables using SMB-SMB adapters. Install Exlondor Coaxial Cables to Analyzer Tray. Set COM-1208 Main Power Switch 10 ON. Apply Power to COM-120B. Allow 5 minuto warm-up period, Press ANLYZ Instruments Key (4) to access Spectrum Analyzer Operation Sereen. 1-7), a8 needed, for ‘Set Signal Generator for -40 dBm output. Adjust 87A12R977 (Figu proper display 1-7), a8 needed, tor ‘Set Signal Generator for -90 dBm output. Adjust 87A12R980 (Figu proper display. Repeat Steps 40 and 41 as naeded for proper display. ‘Sot COM-1208 Main Power Switeh to OFF. Disconnect coaxial cables from Analyzer Tray Romove Analyzer Tray trom Analyzer Tray Extender Gard. Remove Analyzer Tray Extender Card from COM-1208. Install Analyzer Teay in COM-1200,ste PROCEDURE lal Cables and SMB-SMB Adapters from Analyzer Tray coaxial cables. Install Analyzer Tray Coaxial Gables to Analyzer Tray. 47, Set COM-1208 Main Power Switch to ON. Apply Power fo COM-1208, Allow 5 minute warm-up period. 48. Press ANLYZ Instruments Key (4) to access Spectrum Analyzar Operation Ser 49. Goto Step 24 50. Set Signal Generator for -40 48m. 51, Sot Sean Width to 20 KH. 52, Verity Signal Peak is on conter graticule (40.5 Major Divisions). If in tolerance go to Step 67 PERFORM STEPS 53 THROUGH 66 ONLY WHEN REQUIRED. 53. Set COM-1208 Main Power Switch to OFF. ‘54, Disconnect coaxial cables trom Analyzer Tray. 55. Remove Analyzer Tray {rom COM-120B. Install Analyzer Tray Extender Card in COM-1208.” Install Analyzer Tray on Analyzer Tray Extender Card. 56. Connect Extender Coaxial Cables to Analyzer Tray coaxial cables using SMB-SMB. adapters. install Extender Coaxial Cables to Analyzer Tray. 57. Set COM-1208 Main Power Switch to ON. Apply Power to COM-1208, Allow 5 minute warm-up period. 58. Press ANLYZ Instruments Key (4) lo access Spectrum Analyzer Operation Screen. 59, Switch Sean Width between 20 kHz and 200 kHz, allows boih settings to be closest fo center gratlcul dusting 87A12R440 for setting that 60. Sel COM-1208 Main Power Switch to OFF 61, Disconnect coaxial cables trom Analyzer Tray. 62. Remove Analyzer Tray from Analyzer Tray Extender Card. Remove Analyzer Tray Extender Cara trom COM-120B. Inetall Anaiyzor Tray in COM 1208. 63, Remove Extender Coaxial Cables and SMB-SMB Adapters from Analyzer Tray coaxial cables. Install Analyzer Tray Coaxial Cables to Analyzer Tray. 64. Set COM-1208 Main Power Switch to ON. Apply Power to COM-1208, Allow § minute warm-up period 65. Press ANLYZ Instruments Key (4) to access Specttum Analyzer Operation Sereen, 66. Goto Step 52, 1-33step. 67. 69, 70. n 7, na ” %. 7. 7. 79, 80. 82, 8. 84, 285, 86, 87, 4.94 PROCEDURE Pross ANLYZ Instruments Key (4). Set Scan Width to 1 KHz. Verity Signal Peak is on center graticule (20.5 Major Divisions). If in tolerance, go to Step 76. PERFORM STEPS 69 THROUGH 75 ONLY WHEN REQUIRED. Pross SETUP MEMORY Koy (21). Solect “1. Calibration” trom Setup Sereen Pross ENTER Key to access Password Field. Pross SHIFT, F, M, Y, S, V, C, D and SHIFT Data Entry Keys (5). Press ENTER Key Select “5. SPECTRUM ANALYZER" to access SPECTRUM ANALYZER CALIBRATION. Sereen Press ENTER Key. Edit Data Field using DATA SCROLL Keys (17) until signal is centered Pross ENTER Key and walt until Field dleplays CALIBRATED. ross RETURN Solt Function Key F6 to return to Calibration Seren, Go 10 Step 68. Set Signal Generator or 1 kH2 tone at 5 kHz devation, Verity signal peaks on Major Divisions (20.5 Majar Divisions). 1H in tolerance, go to Step 92, PERFORM STEPS 78 THROUGH 01 ONLY WHEN REQUIRED. Set COM-1208 Main Power Switch to OFF. Disconnect coaxial cables trom Analyzer Tray. Remove Analyzer Tray trom COM-120B. Install Analyzer Tray Extender Gard in COM-1208. Install Analyzer Tray on Analyzer Tray Extender Cars, Connect Extender Coaxial Cables to Analyzer Tray coaxial cables using SMB-SMB adapters. Inetall Extender Coaxial Cables to Analyzer Tray. Set COM-1208 Main Power Switch to ON, Apply Power to COM-1208. Allow 5 minute warm-up period Press ANLYZ Instruments Key (4) {0 access Spectrum Analyzer Operation Screen. ‘Adjust 87A12R26 (Figure 1-7) until signal peaks on Major Divisions: Set COM-1208 Main Power Switch to OFF. Disconnect coaxial cables trom Analyzer Tray. Romove Analyzer Tray {rom Analyzer Tray Extender Card. Remove Analyzer Tray Extender Gard from COM:1208. Install Analyzer Tray in COM-1205,STEP. 28, 89, 90, ot 92. PROCEDURE. Remove Extender Coaxial Cables and SMB-SMB Adapters from Analyzer Tray coaxial ‘cables. Install Analyzer Tray Coaxial Cables to Analyzer Tray. ‘Set COM-1208 Main Power Switch to ON. Apply Power to COM-120B. Allow 5 minute warm-up period, Press ANLYZ Instruments Kay (4) to access Spactcum Analyzer Operation Screen. Go to Gtop 77. Set COM-1208 power to OFF and disconnact test equipment. 195,1-8-12 MIXER NULL CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION 158-2 TGXOJOCKO CALIBRATION EQUIPMENT REQUIRED: None FIGURES: 18 ster PROCEDURE 4. Apply Power to COM-1208, Allow § minute warm-up period 2. Press ANLYZ Instruments Key (4) to access Spectrum Analyzer Oper 3, Set Spectrum Analyzer Fields as follows: tion Screen, ‘Sean Wieth 1 mHe Logarithmic Function dm Tracking Generator” = OFF Mode uve Attenuation os AF input ANT Seal i008 Genter Frequency 0.2500 mz 4A. Verity Zero Frequency Response is 21.5 Major Divisione down from top of screer 190 to Step 6. Wot, 5. Set COM-1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 6. Set COM-1208 Main Power Switeh (25) to OFF. 7. Disconnect coaxial cables and remove Receiver Tray trom COM-1208, 8, Install Receiver Extender Tray into COM-120B. Install Receiver Ribbon Cable between Receiver Extender Tray and Receiver Tray. Connect coaxial cables, 9. Apply Power to COM-120B. Allow 5 minute warm-up period 10. Pross ANLYZ Instruments Key (4) to access Spectrum Analyzer Operation Screon 11, Set Spectrum Analyzer Flelas as rotlows: Sean Wigth 1 mie Logarithmic Function 8m Tracking Generator «= OFF Mode Live Attenuation ods RF Input ANT. Scale f0ae Center Frequency 0.250 MHzster PROCEDURE 2 18 4, 15 16. a7ataatase. mm a @ ® Figure 1-8 Mixer Null Calibration Points ‘Adjust 87A1SA1ASRS and 87A13A1ASRT (Figure 1-8) uni Zero Frequency Responsi 21.5 Major Divisions down from top of screen, Set COM-1208 Main Power Switch (25) to OFF. Disconnect coaxial cables and Receiver Ribbon Gable from Receiver Tray. Remove Receiver Extender Card and Receiver Ribbon Cable from COM-1208. Install Receiver Tray into COM-120B. Connect coaxial cables. Go to Step 1 1.971-818 FM DEVIATION METER CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION 118-2 TGXO/OGXO CALIBRATION EQUIPMENT REQUIRED: 1 MODULATION ANALYZER 1 Shar Geneearon iaunes 1 ceneraron ce “avern ” ourwur satenna wut Figure 1-9 Modulation M STEP PROCEDURE 1. Apply Power to COM-120B. Allow § minute waem-up period. 2. Press REG Test Mode Key (9) to access RF Receive Oper lon Screen, 8. Set Receive Operation Screen Parameters as follows: RF Fiela 101.0000 MHz Input aur ‘Attenuation 3008 Demedulation Type FM IF Banowisth 300 kis 4. Move cursar to Line. 5. Press CONFIG Soft Function Key F6 to access Recelver Audio/Data Fi 6. Set Modulation Meters Filter Line High-Pass Filter tor 900 Hz. 7. Set Modulation Meters Filler Line Low-Pase Filter for 4 kzster PROCEDURE 8. Press EXEC Soft Function Key F6. 9. Press RETURN Solt Function Key F6 to return to AF Receive Operation Screen, 40. Connect Test Equipment as shown in Figure 1-9. 11. Access Full Seroon Deviation Motor 12, Sot FM Deviation Moter Parameters ae follows: Seope/Demod Coupling AC Range 20 kHz Peak Hold Orr Average OFF 19. Set Signal Generator for 101 MHiz Signal FM Modulated with 1 kHz tone at 10 kHz ialon at 10 output level 14. Sot Modulation Analyzer for FM Measurement with 300 Hz High-Pass Filler, 3 kH2 Low-Pass Filter ang Peaks detector activated, 15. Vority Modulation Analyzer reading and FM Deviation Meter Reading mateh (1.1 kH2). if not, go to Step 18, 16. Set Range to 50 kHz, 17. Set Signal Generator tor 20 kHz Deviation. 18. Verity Modulation Analyzer reading and FM Deviation Mater Reading match (2.6 kHz). not, go to Stop 18, 18, Sot Range to 100 KHz 20. Set Signal Generator for 50 kHz Deviation, 21. Verily Modulation Analyze fot, go t0 Step 1 fading and FM Deviation Meter Reading match (45,1 kH2). if 22. Sel COM-1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 20. Prose SCTUP MEMORY Key (21). 24, Select “1, Calibr ion" {rom Setup Screen 25. Press ENTER Key to accost Pastword Field, Prats SHIFT, F. M, Y, S, V, C, D and SHIFT Data Entry Keys (5). Press ENTER Key, 26. Select “11. FM DEVIATION METER" to access FM DEVIATION METER CALIBRATION Sereen, 27. Set Signal Generator for 10 kHz deviationstep. 28, 29. 30. a 32 33, 34, 35. 36, a7, 38, 39, 40. “1 42. 43. 1-40 PROCEDURE Move cursor to 10 kH2 Field. Enter Modulation Analyzer Reading in Data Field using DATA ENTRY Keys (5). Pross ENTER Key and wait until Flold displays CALIBRATED. ‘Set Signal Generator for 20 kHz deviation Move cursor (o 20 KHz Field, Entor Modulation Analyzer Reading in Data Field using OATA ENTRY Keys (5) Press ENTER Key and wait until Field displays CALIBRATED. Sot Signal Generator for 50 kHz deviation Move cursor to 50 KHz Fiel Enter Modulation Analyzer Reading in Data Field using DATA ENTRY Keys (5). Press ENTER Key and wall unl Field displays CALIBRATED. Sot Signal Generator for 100 kHz deviation Move cursor to 100 ki Field. Enter Modulation Analyzer Reading in Data Fleld using DATA ENTRY Keys (5) Pross ENTER Key and wait until Fiold cieplays CALIBRATED. Press RETURN Soft Function Key F6. Go to Step 2.1-8-14 PM DEVIATION METER CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION 1-8-2 TCXO/OCXO CALIBRATION EQUIPMENT REQUIRED: 1 MODULATION ANALYZER 1 SIGNAL GENERATOR, FIGURES +9 STEP. PROCEDURE 1. Apply Power to COM-120B. Allow 5 minute warm-up period 2. Press REC Test Mode Key (3) to access RF Receive Operation Sereen 3. Set Receive Operation Screen Parameters as follows: RF Field 101.0000 MHz Input ant Attenuation 3008 Demodvlation Type Pak IF Bandwidth 900 ke 4. Move cursor to Line, Press CONFIG Solt Function Key FS to access Receiver Augio/Data Filters Setup Menu ‘Set Modulation Meters Filter Line High-Pass Filter for 300 Hs. 7. Set Modulation Meters Filter Line Low-Pats Filter for 4 kHe, 8. Press EXEC Soft Function Key FS. 8, Press RETURN Soft Function Key F6 10 return to AF Re 10. Connect Test Equipment as shown in Figure 1-9. 11. Access Full Screen Phase Meter, 12, Set Phase Meter Parameters as follows: Range soRaD Peak Hold OFF Average, Ore 19, Set Signal Generator for 101 MHz Signal FM Modulated with 1 kHz tone at § kHz deviation at -10 dBm output le 14, Set Modulation Analyzer for PM Measuroment with 200 Hz High-Paee Filter, @ kHz Low-Pass Filler and Poak+ detector activated 15. Verily Modulation Analyzer reading and Phase Meter Reading match (40.7 Radians). If not, go 10 Step 12,ster PROCEDURE 16. Set COM-1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 17. Press SETUP MEMORY Key (21), 16. Select “1. Calibr jon" from Setup Screen. 19, Press ENTER Kuy to accuss Password Field, Press SHIFT. F,M, , 8, ¥, ©, D and SHIFT Data Enity Keys (5). Press ENTER Key. 20, Select “12. PM DEVIATION METER to access PM DEVIATION METER CALIBRATION Sereen 21, Enter Modulation Analyzer Reading in Data Field using DATA ENTRY Keys (5). 22. Press ENTER Key and wait until Field displays CALIBRATED. 28, Press RETURN Soft Function Key F6. Go to Step 2 1421-8-15 AM MODULATION METER CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION 1-8-2 TGXO/OGXO CALIBRATION EQUIPMENT REQUIRED: 1 MODULATION ANALYZER i SIGNAL GENERATOR FIGURES: 19 ster PROCEDURE 1. Apply Power to COM-1208. Allow § minute warm-up period. 2. Press REC Test Mode Key (3) to access RF Receive Operation Screen, 3. Set Receive Operation Screen Parameters as follows: RF Fiela 101 Miz Input ANT. Altenvation 3008 Demodulation Type AM IF Bandwidth 300 ke 4. Move cursor to Line. Press CONFIG Soft Function Key F6 to access Receiver Audio/Data Selup Menu. Set Modulation Meters Filter Line High-Pass Filler for 300 Hz. Sot Line Low-Pass Filler for 4 kiiz. Press EXEC Soft Function Key FS. Press RETURN Sott Function Key F6 to return to RF Receive Operation Screen. 5. Connect Test Equipment as shown in Figure 1-8. 6. Access Full Screen Modulation Mater 7. Set AM Modulation Meter Parameters as follows: Range 100% Peak Hole orr Average Orr 8. Set Signal Generator for 101 MHz Signal AM Modulated with 1 kH2 tone at 70% Modulation at-10.d8m output lovel, 9, Set Modulation Analyzer for AM Masi Low-Pass Filler and Peaks detector 10. Verity Modulation Analyzer reading and AM Modulation Meter Reading match (5.1%). tt ot, go to Step 12. 11, Sot COM.1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 12, Press SETUP MEMORY Key (21) 1. Select “1. Calibration” trom Setup Screen.STEP PROCEDURE 14, Prase ENTER Key to accese Password Field. Pross SHIFT, F, M, ¥, S, V, C, D and SHIFT Data Entry Keys (5). Press ENTER Key. 15, Select “13. AM MODULATION METER" to access AM MODULATION METER CALIBRATION Sereen, Reading in Data Field using DATA ENTRY Keys (5) 16. Enter Modulation Analyzs 17. Press ENTER Key and wait unl Field displays CALIDRATED. 18. Press RETURN Soft Function Key F6, Go to Step 2. 1481-8-16 POWER METER CALIBRATION PREREQUISITES: 1-8-1 POWER SUPPLY CALIBRATION 4-8-2 TEXOJOCXO CALIBRATION 10 WRF AMPLIFIER, 20 dB ATTENUATOR, 50 © TERMINATION 200 W AF AMPLIFIER, ‘COAXIAL COUPLER SIGNAL GENERATOR EQUIPMENT REQUIRED: 1 1 1 1 1 FIGURES: ‘sicNAL GENERATOR ; sown 200 W AF MEASURING ‘AMPLIFIER ‘AMPLIFIER RECEIVER, cone 1208 ner eo a euwur| —coaxiat — | ootrur 20s 18 couPLER ATTENUATOR Figure 1-10 Power Meter Calibration Setup Ter PROCEDURE 1. Apply Power to COM-1208, Allow 5 minute warm-up period, 2. Pross REC Test Mode Key (3) to access RF Receive Operation Ser 3. Set Receive Operation Sereon Parameters as follows: RE Fiold 101 Me Input TA Attenuation ode IF Bandwicth 300 kHe 4. Access Full Seroen RF Power Meter,ster PROCEDURE 5. Set Power Motor Parameters as follows: ange 20 mw Peak Hold orr Average OFF Cable Loss 0.048 6. Connect $0.2 Termination to T/R Connector (7). With cursor on Range, press RE-ZERO Son Ponction Key F3. 7. Connect Test Equipment as shown in Figure 1-10. ‘8, Set Test Equipment for 101 MHz signal with 15 mW output level at connection to T/R. Connector (7): NOTE: Test Equipment must be characterized for accuracy of 2.5% of required setting 9. Vority Power Meter Reads 15 mW (1.7 mW). If not, go to Step 21 10, Set Range to 2 w. 11, Connect 50 0 Termination to T/R Connector (7). With cursor on range, press RE-ZERO Soft Function Key F3. 12, Connect Test Equipment as shown in Figure 1-9, 13, Sot Test Equipment for 1.5 W output lovel at connection to T/R Connector (7). NOTE: Tost Equipment must be characterized for accuracy of 2.5% of required selting 14. Verity Power Meter Reads 1.5 W (40.5 W). If not, go to Step 21 18. Set Range to 50 W, 16. Connect 50 9 Termination to T/R Connector. With cursor on range, press RE-ZERO Soft Function Key F3, 17. Connect Tost Equipment as shown in Figure 1-9. 18. Sot Test Equipment for 40 W output love! at connoction to T/R Connector (7) NOTE: Test Equipment must be characterized for accuracy of 2.5% of required setting 19. Verily Power Meter Reads 40 W (44.1 W). If not, go to Step 21 20. Set COM-1208 power to OFF and disconnect test equipment. PERFORM THE FOLLOWING ONLY WHEN REQUIRED. 21. Press SETUP MEMORY Key (21). 22. Select “1, Calibration” trom Setup Screen,STEP. PROCEDURE 29, Press ENTER Key to access Password Field. Press SHIFT, F, M, Y, S, V, C, D and SHIFT Data Entry Keys (5). Press ENTER Key, 24. Select “4. RF POWER METER" to access RF POWER METER CALIBRATION Seren, 25. Connect 502 Termination to T/R Connector (7). With cursor on “WITHOUT ANY INPUT PRESS THE ZERO KEY" Field, press ZERO Soft Function Key F1 m8 26. Connect Test Equipment as shown in Fi 27. Move Cursor to 18.0 mW Fiele, 28, Set Test Equipment for 101 MHz signal with 15 mW output level at connection to TR Connector (7) NOTE: Test Equipment must be characterized for accuracy of 2.5% of required setting, 29. Enter Power Level applied in Dai Field using DATA ENTRY Keys (5) 90. Press ENTER Key and wait until Field displays CALIBRATED. 81. Move Cursor to 1.50 W Fiela. fel at connection to T/R Connector (7). 82. Set Test Equipment for 1.5 W output I ott Test Equipment must be characterized for accuracy of 2.5% of required setting 89. Enter Power Level applied in Data Field using DATA ENTRY Keys (6). 34. Press ENTER Key and wait until Flold displays CALIBRATED. 35, Move Cursor to 40 W Field. 36. Set Test Equipment for 49 W output level at connection to TIR Connector (7). NOTE: Test Equipment must be characterized for accuracy of 2.5% of required setting 47. Enter Power Lovel applied in Data Field using DATA ENTAY Keys (8). 88. Press ENTER Key and wait until Field displays CALIBRATED. 89. Press RETURN Soft Function Key F6, Go to Step 2, varCOM-1208 CALIBRATION RECORD Technician: PARA STEP DATA RESULT 1 2 ata We (40.28 V), A7AGINO PIN 4,18 495 Ve (21 V), B7AGJ10 PIN 2.14 “10.5 Ve (40.5 V), 87AGJ10 PIN 3,15 $10.8 Vode (40.25 V), B7AGITO PIN 6.16 #5 Vde (+0.2 VI-0.0 V), 87A610 PIN 5,17 +5 Vdo (40.2 VI-0.0 V), B7AGI0 PIN 7,19 412 Vee (20.28 V), 87A6I10 PIN 9,24 9. 998,0000 (199.6 H2) 10,998,000 «210 He) 12,998,000 (410 Hz) (Adjustment Required) 8. 190.Veme (410.1 V) 49 Vems (21.02 V) 1.9 Vems (106 mV} — 1 190 ¥de (410.1 vy 19 Vée (44.02 V) — 1.9 vide (£108 mv) 6 -20.d8m (42 40) 7. -90.dBm (22 48) — 8-390 dam 22.6 48) — 10,20 dBm (22 8) — 11. -90 dBm (22 8) — 12-130 68m (22.5 48) =oPARA STEP DATA AeSULT 1-8-5 14. Audio Analyzer reads 10% Distortion _ 21. Readings mateh (20.6%) — 106 14 Audio Analyzer reads 20 48 SINAD. — 21. Readings match (41.1 48). — 107 7. Record Modulation Analyzer Residual — 18, 10 kMz Deviation (£600 Hz « residual (Step 7)) — 15. Record Modulation Analyzer Residual. — 48. Readings match (£600 He + resioval [Step 15)) — 20. Record Modulation Analyzer Residual. __ 2810 AM Deviation (2600 He + residual (Step 20)) — 25. 10 hitz Deviation (2600 Hz + residual [Step 20}) — 27. Record Modulation Analyzer Residual. — 81.100 KMz Deviation (25.5 KHz + residual [Stop 27) 33. Record Modulation Analyzer Residual __ 96, 100 kHz Deviation (45.5 kHz + residual [Stop 29) 38, Record Modulation Analyzer Residual — 41,100 kHz Deviation (25.5 kHz + residual (Stop 98)) — 48.100 kHz Deviation (45.5 kHs + residual [Stop 3)) — 1-08 7. Record Modulation Analyzer Residual. a 49. Radians Deviation (0.5 Radians + residual (Step 7) __ 7. Record Residual on Modulation Analyzer — 19. 90% Modulation (20% + resiaual (Step 7)) — 15, 50% Modulation (26% + residual (Step 7)) — 17, 70% Modulation (26% + residual (Step 7]) — 19. 80% Modulation (46% + resigual {Step 7)) — 1810 10, 0% (#10%)PARA vet 012 1019 STEP. 4, 2. 20, 2, 28, 30. 4 13. 14 3a. 52, ee. 7 10. 13, 16 DATA 16 hie (21.6 KHz) fie (40.8 KHz} 1.55 kttz (20.185 kH2) 80 kit (8 kH2) 16 Radians (44.6 Radians) 8 Radiane (40.8 Radians) 1.85 Ragians (20.188 Radians) Top of sereen is -30 Bm Note Trace peak level ‘Trace peak level matches relerence level irom Step 8 (12 68m}. Note Signal Level Traco peak lavel matches reference let from Step 13 (22 68m) 500 KHz io Kz 100 ke to Miz -30 to -40 dBm, decreases 10 dB (+2 dB) “40 to -80 dBm, decreases 10 48 (22 dB) “50 to -60 dBm, decreases 10 dB (22 dB) “60 10-70 dBm, decreases 10 dB (:2 dB) “70 to -80 dBm, decreases 10 JB (22 dB) “80 10 -80 dBm, decreases 10 dB (22 dB) Peak is on Genter Graticule (20.8 Major Divisions). Peak Is on Center Graticule (20,6 Major Divisions}. Peaks are on Major Divisions (20.8 Major Divisions), Zoro Frequency Response is 21.5 Major Divisions ‘down trom top of sereen. Readings match (1.1 kH2) Readings match (22.6 kH2} Readings match (45.1 kH2) RESULT LTTE HUTT [|PARA 10-14 18-16 1-816 STEP. 10. 10, 9. 14 v9, DATA Readings match (20.7 Racians) Readings match (28.1%) 15 mw (1.7 mw) 1.5 W (40.9 W) sow Gat wy) RESULT 4-51/1-82 Blank