Kenwood NXR-800 Service Manual

Also see for NEXEDGE NXR-800: Brochure Instruction manual Instruction manual Instruction manual Instruction manual

Contents

NXR-80038ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications / RemarksTest-equipment Unit Terminal Unit Parts Method15. HighTransmitPower(Pre ADJ)1) Low Power meterPCRear TX ANT PCADJValue: 1024 Fixed value writingFinal VR2 5.0W ±0.1W16. CouplerADJ1) Low DVM Final REF Final VR1 Adjust to the mini-mum value.17. HighTransmitPower(Max powerlimit ADJ)1) High Power meterPCRear TX ANT PCADJValue: 1024 Fixed value writingFinal VR2 7.0W ±0.2W18. HighTransmitPowerFrequency1) Low2) Center3) HighAttach the EXCITER/FINALshield cover.Power meterAmmeterRear TX ANT PCADJ5.0W ±0.1W4.4A or less19. LowTransmitPowerFrequency1) Low2) Center3) HighAttach the EXCITER/FINALshield cover.0.50W ±0.01W3.3A or less20. Deviation(The transmis-sion VCO bandis separatedinto A and B.3-points foreach, i.e., totalof 6-points shallbe adjusted.)Modulation pattern: 100Hz square signalConnect the deviation meter tothe TX ANT end via the ATT.Deviation meter settingHPF: OFFLPF: 15kHzDe-emp: OFFDetector: (p-p)/21) A: Low2) A: Center3) A: High4) B: Low5) B: Center6) B: HighDeviationmeterOscilloscopePCRear TX ANT PCADJ±1.10kHzAdjust it into cleansquare wave withchanging “Sub-audible Gain” and“Audible Gain”.±0.05kHzConnect the deviation meterto the TX ANT end via theATT.Exit “Deviation” screen to “TestMode” screen, then set testsignaling mode to be “NXDN”and signaling number to be “3”.Set Wide/Narrow drop downlist to be “Narrow”. Set testchannel to be “1”.Deviation meter settingHPF: OFFLPF: 15kHzDe-emp: OFFDetector: +peak, –peakPush “Transmit” button, thenmeasure the deviation.Check ±3.06kHz±0.20kHzClean sine wave.