Icom IC-F4261DT Service Manual

Contents

Icom IC-F4261DT Service Manual Manual pdf 58 page image

5 - 5FREQUENCY ADJUSTMENTS1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, and then push [ENTER].(The values shown above are exsample only.Each transceiver has own values.)Lock voltage will be displayed here.• I/O Check windowADJUSTMENT TRANSCEIVER’SCONDITION OPERATION ADJUSTMENTITEM VALUEPLL LOCKVOLTAGE1–1) Connect an RF power meter to the an-tenna connector.2) Set the preset adjustment value on theadjustment utility window.[LV (RX 1)][LV (RX 2)][LV (TX)]"51"(for each)(RX band low) 2 • Channel : 1-1• Receiving• Select the item [RX LVA1], and then push[ENTER].[RX LVA1] 1.00 V(RX band center) 3 • Channel : 1-2• Receiving• Select the item [RX LVA2], and then push[ENTER]. [RX LVA2](TX) 4 • Channel : 1-3• Transmitting• Select the item [TX LVA], and then push[ENTER]. [TX LVA](RX band center) 5 • Channel : 1-4• Receiving• Click the [Reload (F5)] button to check onthe "I/O Check window" as below.[LVIN](On the "I/OCheck window")3.2–4.4 V*3.4–4.4 V**3.5–4.5 V***(Verify)(RX band high) 6 • Channel : 1-5• Receiving3.2–4.4 V*3.4–4.4 V**3.5–4.5 V***(Verify)(TX) 7 • Channel : 1-6• Transmitting3.2–4.4 V*2.5–3.5 V**3.2–4.4 V***(Verify)REFERENCEFREQUENCY1 • Channel : 1-7• Transmitting• Loosely couple a frequency counter to theantenna connector.[REF]470.000000MHz*520.000000MHz**400.000000MHz***(±50 Hz)*; [Low band] **; [High band] ***; [350 MHz band]