ID-880H/E880 SERVICE MANUAL

5-4 ANALOG DEVIATION ADJUSTMENTS (UHF BAND)Select an adjustment item using [VFO/MHz] / [M/CALL], then set the adjustment value as specifi ed using [DIAL].ADJUSTMENTADJUSTMENTITEMOPERATIONVALUEUHF BANDFM DEVIATION1 1) Connect a modulation analyzer to the antenna connectorthrough an attenuator, and set is as;HPF: OFFLPF: 20 kHzDe-emphasis : OFF–Detector : (P-P)/2[FMS]2) Connect an audio generator and an AC millivoltmeter tothe JIG cable (See the page 5-1).[BAND LOW] (FM) 2 1) Set the audio generator as;Frequency : 1 kHz±4.2 kHz[BAND LOW] (FMN) 3 Level : 80 mVrms [USA]±2.1 kHz[BAND HIGH] (FM) 4 : 20 mVrms Except [USA]±4.2 kHz2) While transmitting, adjust the deviation using [DIAL], then[BAND HIGH] (FMN) 5push [BAND] to store the adjustment value.±2.1 kHzVHF BANDMODULATIONBALANCE1 1) No audio signals are applied.2) Connect an oscilloscope to the modulation analyzer. –[BAND LOW] (FM) 2 • While transmitting, adjust the waveform using [DIAL], then Set to square wave[BAND LOW] (FMN)[FMB]3push [BAND] to store the adjustment value.[BAND HIGH] (FM) 4[BAND HIGH] (FMN) 5DTCS DEVIATION1 1) Connect a modulation analyzer to the antenna connectorthrough an attenuator, and set is as;HPF: OFFLPF: 20 kHz–De-emphasis : OFF[MDT]Detector : (P-P)/22) No audio signals are applied.[UHF BAND] (FM) 4 • While transmitting, adjust the deviation using [DIAL], thenpush [BAND] to store the adjustment value.±0.80 kHz[UHF BAND] (FMN) 5 • Push [VFO/MHz] to skip this item. –CTCSS DEVIATION1 1) Connect a modulation analyzer to the antenna connectorthrough an attenuator, and set is as;HPF: OFFLPF: 20 kHz–De-emphasis : OFF[MCT]Detector : (P-P)/22) No audio signals are applied.[UHF BAND] (FM) 4 • While transmitting, adjust the deviation using [DIAL], thenpush [BAND] to store the adjustment value.±0.75 kHz[UHF BAND] (FMN) 5 • Push [VFO/MHz] to skip this item. –5 - 5