Icom IC-F4021T Service Manual

Also see for IC-F4021S: Instruction manual Instruction manual Instruction manual

Contents

Icom IC-F4021T Service Manual Manual pdf 18 page image

6 - 56-3 TRANSMIT ADJUSTMENTSelect an adjustment item using [↑] / [↓] keys, then set to the specified value using [←] / [→] keys on the connected PC’s keyboard.ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT VALUEUNIT OPERATIONOUTPUTPOWER[Power (Hi)]1 • Channel• Transmitting: CH 3 ToppanelConnect an RF power meter tothe antenna connector.4.0 W[Power (L2)] 2 • Channel• Transmitting: CH 4 2.0 W[Power (L1)] 3 • Channel• Transmitting: CH 5 1.0 WFMDEVIATION(NARROW)[MOD N]1 • Channel : CH 5 ToppanelConnect the FM deviation me-ter to the antenna connectorthrough an attenuator.±2.05 to ±2.15 kHz• Connect an audio generator to the JIGcable and set as;Frequency : 1.0 kHzLevel : 150 mV rms• Set the FM deviation meter to same condi-tion as “MODULATION BALANCE."• Transmitting(WIDE)[MOD ratio]2 • Channel• Transmitting: CH 6 ±4.05 to ±4.15 kHz(MIDDLE)*[MOD ratio]3 • Channel• Transmitting: CH 7 ±3.15 to ±3.25 kHzMODULATIONBALANCE[BAL]1 • Channel : CH 5 ToppanelConnect the FM deviation me-ter to the antenna connectorthrough an attenuator.Set to square wave form• No audio applied to the JIG cable.• Set an FM deviation meter same as;HPFLPFDe-emphasisDetector: OFF: 20 kHz: OFF: (P–P)/2• TransmittingCTCSS/DTCSDEVIATION[CTCS/DTCS]1 • Channel : CH 8 ToppanelConnect an FM deviation meter tothe antenna connector throughan attenuator.±0.68 to ±0.72 kHz• No audio applied to the JIG cable.• Set the FM deviation meter to same condi-tion as “MODULATION BALANCE."• Transmitting*; [EUR] only.