Kenwood NXR-901 Service Manual

Also see for NEXEDGE NXR-901: Instruction manual Instruction manual

Contents

NXR-90186ADJUSTMENTReceiver SectionItem ConditionMeasurement AdjustmentSpecifications / RemarksTest-equipment Unit Terminal Unit Parts Method1 MCF 1) NarrowTracking generatorOutput: –20dBmSpectrum analyzerFrequency: 73.05MHzSpan: 50kHzTrackinggeneratorSpectrumanalyzerRX CN46CN47RX L232L246Adjust it to look likethe wave in fi gure 1.Refer to Fig. 1. (Page 80)2. Discriminator 1) NarrowFrequency: Desired frequencySSG output: –53dBm (501μV)SSG MOD: 1kHzSSG DEV: 1.5kHzAF output: 2V/4SSGAF VMRear RX ANTTEST/SPKRjack SPO( pin 12)4 loadRX L286 Adjust AF outputmax.3. RD Level 1) Channel spacing: Analog NarrowConnect the SSG to the RXANT.SSG settingFrequency: Desired frequencyOutput: –53dBm (501μV)MOD: 1kHzDEV: ±1.5kHzSSGAF VMRear RXANTCON-TROLI/O jackRD (pin10)PCADJ80mV ±5mV4. RA Level 1) Channel spacing: Analog NarrowConnect the SSG to the RXANT.SSG settingFrequency: Desired frequencyOutput: –53dBm (501μV)MOD: 1kHzDEV: ±1.5kHzSSGAF VMRear RXANTCON-TROLI/O jackRA (pin11)PCADJ400mV ±20mV5. ReceiverSensitivityCheck1) Channel spacing: Analog NarrowConnect the SSG to the RXANT.SSG settingFrequency: Desired frequencyMOD: 1kHzDEV: ±1.5kHzAF: 0.45V/4SSGDistortionmeterRear RXANTTEST/SPKRjackSPO(pin 12)4 loadCheck –115dBm (0.4μV) or lessMeasure 12dB SINAD SSGlevel to use squelch adjust-ment.6. RF AGC 1) Channel spacing: Analog NarrowSSG settingFrequency: Desired frequencyMOD: OFFLevel: 0dBmSSGSpectrumanalyzerRearRXRXANTCN68PCADJValue: 128 Measure CN68 terminal level: –38dBm~–26dBm2) Channel spacing: Analog NarrowSSG settingFrequency: Desired frequencyMOD: OFFLevel: –25dBmCheck Measure CN68 terminal level: –45dBm~–40dBm