Kenwood NXR-800 Service Manual

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

Contents

NXR-80091ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifi cations / RemarksTest-equipment Unit Terminal Unit Parts Method9. TransmitVCO LockVoltage(Check)1) A: Low DVM TX CV Check 0.9V or more2) A: High 4.2V or less3) B: Low 0.9V or more4) B: High 4.2V or less10. ReceiveVCO LockVoltage(Check)1) A: Low DVMPCRX CV1 Check 0.8V or more2) A: High 4.2V or less3) B: Low 0.8V or more4) B: High 4.2V or less11. ReferenceSignalThe switchingcircuit to switchthe OCXO andthe internalreference oscil-lation1) Connecting SSG to REF INand 50Ω-load parallel.SSG frequency: 10MHzSSG output: +0dBm (224mV)SSGSpectrumanalyzerRearTXREF INREF OUTCheck REF OUT: +5dBm or moreThe OCXO LED (orange)lights.2) SSG frequency: 10MHzSSG output: +0dBm (224mV)SSGOscilloscopeRearTXREF INREF_LVREF_LV: 2.0Vp-p or moreThe OCXO LED (green)lights.3) SSG frequency: 10MHzSSG output: +10dBm (708mV)SSGSpectrumanalyzerRearTXREF INREF OUTREF OUT: +10dBm or lessThe OCXO LED (orange)lights.4) SSG frequency: 10MHzSSG output: –7dBm (99.9mV)REF OUT: –50dBm or lessThe OCXO LED goes off.12. VCXO 1) Confi rm that there is noOCXO and external referenceinput.F. counterPCTX REF_IN PCADJ5.99MHz+0.3ppm ±0.15ppm(5.99000270~5.99000090MHz)It takes a time from move-ment of adjustment value tostability.13. MaximumDeviation(NXDN)1) NXDN Narrow PCADJValue: 22800 Fixed value writing2) NXDN Very Narrow Value: 1000014. DriverAmplifi erPowerDisconnect the cable from TXOUT and insert a cable frompower meter.After the adjustment, connectthe cable to TX OUT.1) Low2) Center3) HighPower meter TX TX OUT(CN802)PCADJ+20.0dBm (100mW) ±0.1dBDisconnect the cable fromTX OUT and insert a cablefrom power meter.After the adjustment, con-nect the cable to TX OUT.