Icom IC-F4021T Service Manual

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

Contents

Icom IC-F4021T Service Manual Manual pdf 17 page image

6 - 46-2 FREQUENCY 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 OPERATIONPLL LOCKVOLTAGE[RX LVA]1 • Channel• Receiving: CH 1 PCscreenClick [Reload (F5)] button, thencheck the “LVIN” item on theCS-F3020 ADJ’s screen as below.1.2 V[TX LVA] 2 • Channel• Transmitting: CH 1CONVENIENT: The “PLL LOCK VOLTAGE” can be adjusted automatically.1: Set the Lock voltage preset ([RX LVA] and [TX LVA]) to “179 (3.15 V).”2: Push the [ENTER] key on the connected PC’s keyboard.1 • Channel• Receiving: CH 2 PCscreenClick [Reload (F5)] button, thencheck the “LVIN” item on theCS-F3020 ADJ’s screen.2.8–4.0 V[Low band]3.0–4.2 V[High band](Verify)2 • Channel• Transmitting: CH 2 3.0–4.2 V[Low]/[High] bands(Verify)REFERENCEFREQUENCY[REF]1 • Channel : CH 1 ToppanelLoosely couple a frequencycounter to the antenna connector.470.000 MHz[Low band]• Connect an RF power meter to theantenna connector.• Transmitting512.000 MHz [USA]520.000 MHz [GEN][High band]