Kenwood NXR-700H Service Manual

NXR-700H116ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications / RemarksTest-equipment Unit Terminal Unit Parts Method9. TransmitVCO LockVoltage(Check)1) A: Low DVM TX CV Check 1.0V or more2) A: High 4.4V or less3) B: Low 1.0V or more4) B: High 4.4V or less10. ReceiveVCO LockVoltage(Adjustment& Check)1) A: Low DVMPCRX CV1 PCADJ0.8V +0.15V, –0.05V2) A: High Check 4.2V or less3) B: Low PCADJ0.8V +0.15V, –0.05V4) B: High Check 4.2V or less11. ReferenceSignalThe switch-ing circuit toswitch theOCXO and theinternal refer-ence oscilla-tion1) Connecting SSG to REF INand 50Ω-load parallel.SSG frequency: 10MHzSSG output: +0dBm (224mV)SSGSpectrumanalyzerRearTXREF INREF OUTTX VR402 +8~+9dBm The OCXO LED (orange)lights.2) SSG frequency: 10MHzSSG output: +0dBm (224mV)SSGOscilloscopeRearTXREF INREF_LVVR401 2.0Vp-p The OCXO LED (green) lights.3) SSG frequency: 10MHzSSG output: +10dBm (708mV)SSGSpectrumanalyzerRearTXREF INREF OUTCheck REF 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) Confirm 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. DriverAmplifierPowerDisconnect 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 from TXOUT and insert a cable frompower meter.After the adjustment, connectthe cable to TX OUT.