Kenwood FM Transceiver TK-481 Service Manual

Also see for FM Transceiver TK-481: User manual Instruction manual Specifications Instruction manual Service manual

39ADJUSTMENTMeasurementTest-equipment Unit TerminalAdjustmentUnit Parts Method Specifications/RemarksConditionItemTK-480/4811. Sensitivity 1) SYS – GRP : 1 – 1 SSG Panel ANT Check 12dB SINAD or more.check SSG output : –116dBmMOD : 1kHz AF VTVMDEV : ± 3kHz (TK-480) Oscilloscope:± 1.5kHz (TK-481) Distortionmeter2. Squelch 1) SYS – GRP : 4 – ✽ Panel Encoder Adjust to point ofadjustment Select SQL ✽ ✽ ✽ knob closing squelch.in tuning mode.SSG output : 3dB below to12dB SINAD level3. Squelch 1) SYS – GRP : 4 – 1 Check Squelch must be opened.check SSG output : 12dB SINAD levelSee Note. 2) SSG output : OFF Squelch must be closed.Note : When squelch is adjusted, the microcomputer simultaneously reads and writes the RSSI level. Do not write adjustment values without the SSGconnected.MeasurementTest-equipment Unit TerminalAdjustmentUnit Parts Method Specifications/RemarksConditionItemReceiver Section22. BATT 1) SYS – GRP : 4 – 1 Power meter Panel ANT Panel Encoder Check Can not transmit.detection BATT terminal voltage : 5.7V Deviation knob LED (TX) blinks.check PTT : ON meterOscilloscope2) BATT terminal voltage : 6.5V TransmitPTT : ON AGAF VTVMNote : When the CPU is changed these adjustment values will become suitable values for NPSPAC, the deviations except MAX DEV in NPSPAC bandare automatically adjusted.