Kenwood TK-885 Service Manual

Also see for TK-885: Instruction manual Service manual

Contents

ADJUSTMENTMeasurementTest-equipment Unit TerminalAdjustmentUnit Parts Method Specifications/RemarksConditionItem36TK-885Receiver Section1. Discriminator 1) Set test mode SSG Rear ANT TX-RX L6 AF output voltageCH : CH1 - Sig1 panel (A/2) maximum.SSG output : –53dBm AF VTVM ACCAF : 1.4V/4Ω Oscilloscope (EXT.SP)2. Sensitivity 1) Set test mode SSG ANT Adjust forSelect “SENS” in tuning mode. maximum SINAD.“L SENS” AF VTVM ACCSSG freq’ : 440.050MHz Distortion (EXT.SP)SSG output : –118dBm/0.31μV meterSSG MOD : 1.5kHz OscilloscopeAF output : 1V/4Ω AG2) “C SENS”SSG freq’ : 455.050MHz3) “H SENS”SSG freq’ : 469.950MHz3. Squelch 1) Set test mode Squelch must beSelect “L SQL” in tuning mode. closed once.SSG freq’ : 440.050MHz Then adjust forSSG output : Sensitivity squelch open point.value of 12dB SINAD.SSG MOD : 1.5kHz2) “C SQL”SSG freq’ : 455.050MHz3) “H SQL”SSG freq’ : 469.950MHz4. RSSI (Low) 1) Set test mode Writing values only.Select “L LRSI” in tuning mode.SSG freq’ : 440.050MHzSSG output : Sensitivityvalue of 12dB SINAD.SSG MOD : 1.5kHz2) “C LRSI”SSG freq’ : 455.050MHz3) “H LRSI”SSG freq’ : 469.950MHz5. RSSI (High) 1) Set test mode Writing values only.Select “L HRSI” in tuning mode.SSG freq’ : 440.050MHzSSG output : –70dBmSSG MOD : 1.5kHz2) “C HRSI”SSG freq’ : 455.050MHz3) “H HRSI”SSG freq’ : 469.950MHz6. Squelch 1) Set test mode Check Squelch must be opened.check CH : CH1 - Sig1SSG freq’ : 455.050MHzSSG output : 15dB SINAD level2) SSG output : OFF Squelch must be closed.