Kenwood NXR-800 Service Manual

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

Contents

NXR-80074ADJUSTMENTAlignmentItem ConditionMeasurement AdjustmentSpecifications / RemarksTest-equipment Unit Terminal Unit Parts Method1. Setting 1) Connect the DC power output to the rear panel DC terminal (13.8V).2) Connect the front panel COM port (D-sub 9 connector) to the PC serial port with a cross cable.3) Activate the FPU to go to the test mode.2. TemperatureSensor1) Receive unit (Celsius orFahrenheit)Ther-mometerMeasuring roomtemperature, writethe value with PC.2) Transmit unit (Celsius orFahrenheit)3. DriverAmplifierPower(Pre ADJ)1) Low2) Center3) HighPCADJValue: 1 Fixed value writing4. RF PowerDownDetection1) High2) LowPCADJValue: 1 Fixed value writing5. MaximumDeviation(NXDN)1) NXDN Narrow PCADJValue: 22800 Fixed value writing2) NXDN Very Narrow Value: 100006. VCO LockVoltage1) REF LowSSG frequency : 10MHzSSG output: –10dBm (70.7mV)SSGDVMTX REF INREF CVCheck 1.5V or more2) REF HighSSG frequency: 10MHzSSG output: +10dBm (708mV)3.5V or less3) MOD LowSSG frequency: 10MHzSSG output: –10dBm (70.7mV)REF INMB_CV11.5V or more4) MOD HighSSG frequency: 10MHzSSG output: +10dBm (708mV)3.5V or less7. TransmitVCO LockVoltage(Adjustment)1) A: Low DVM TX CV TX L128 Adjust the interval ofthe L128.1.60V±0.05V2) B: Low L108 Adjust the interval ofthe L108.1.60V±0.05V8. ReceiveVCO LockVoltage(Adjustment)1) A: Low DVM RX CV1 RX L28 Adjust the interval ofthe L28.0.90~0.95V2) B: Low L30 Adjust the interval ofthe L30.1.05~1.10V9. Fixation ofOscillationCoil1) Apply the high-frequency varnish to the adjusted Transmit VCO coil (L128, L108) and cover it with a shield cover.2) Apply the high-frequency varnish to the adjusted Receive VCO coil (L28, L30) and cover it with a shield cover.10. TransmitVCO LockVoltage(Check)1) A: High DVM TX CV Check 3.6~4.2V2) B: High