49ADJUSTMENTMeasurementTest-equipment Unit TerminalAdjustmentUnit Parts Method Specifications/RemarksConditionItemTK-780Receiver 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' : 146.050MHz Distortion (EXT.SP)SSG output : –118dBm/0.31μV meterSSG MOD : 1.5kHz OscilloscopeAF output : 1V/4Ω AG2) "C SENS" Adjust forSSG freq' : 160.050MHz maximum SINAD.3) "H SENS" Adjust forSSG freq' : 173.950MHz maximum SINAD.3. Squelch 1) Set test mode Squelch must beSelect "nL SQL" in tuning mode. closed once.SSG freq' : 146.050MHz Then adjust forSSG output : Sensitivity squelch open point.value of 12dB SINAD.SSG MOD : 1.5kHz (Narrow)2) "nC SQL"SSG freq' : 160.050MHz3) "nH SQL"SSG freq' : 173.950MHz4) "sL SQL", "sC SQL", "sH SQL"SSG freq' : Same asnarrow adjustment.SSG output : Sensitivityvalue of 12dB SINAD.SSG MOD : 2.4kHz (Semi-wide)5) "wL SQL", "wC SQL", "wH SQL"SSG freq' : Same asnarrow adjustment.SSG output : Sensitivityvalue of 12dB SINAD.SSG MOD : 3.0kHz (Wide)4. RSSI (Low) 1) Set test mode Writing values only.Select "nL LRSI" in tuning mode.SSG freq' : 146.050MHzSSG output : Sensitivityvalue of 12dB SINAD.SSG MOD : 1.5kHz (Narrow)2) "nC LRSI"SSG freq' : 160.050MHz3) "nH LRSI"SSG freq' : 173.950MHz4) "sL LRSI", "sC LRSI", "sH LRSI"SSG freq' : Same asnarrow adjustment.SSG output : Sensitivityvalue of 12dB SINAD.SSG MOD : 2.4kHz (Semi-wide)5) "wL LRSI", "wC LRSI", "wH LRSI"SSG freq' : Same asnarrow adjustment.SSG output : Sensitivityvalue of 12dB SINAD.SSG MOD : 3.0kHz (Wide)