Frequency Adjustment - Icom IC-F5220D Service Manual

6-2 FREQUENCY ADJUSTMENTS
1) 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, then push [ENTER].
TRANSCEIVER'S
ADJUSTMENT
PLL LOCK 1 • Channel
VOLTAGE • Receiving
(RX)
(TX) 2 • Channel
• Transmitting
(RX) 3 • Channel
[Verify] • Receiving
(TX) 4 • Channel
[Verify] • Transmitting
NOTE: Only when the lock voltage is not in the specifi ed range, perform following adjustments.
(RX) 5 • Channel
• Receiving
(TX) 6 • Channel
• Transmitting
REFERENCE 1 • Channel
FREQUENCY • Transmitting
CONDITION
: 1-1 1) Connect an RF power meter to the an-
tenna connector.
2) Set the adjustment value on the "Adjust
Utility" screen.
: 1-2
: 1-3 • Click the [Update (F5)] button to check on
the "I/O Check window" as below.
: 1-4
: 1-3 1) Connect an RF power meter to the an-
tenna connector.
2) Set the adjustment value on the "Adjust
Utility" screen.
: 1-4
: 1-5 • Loosely couple a frequency counter to the
antenna connector.
• I/O Check screen
(The values shown above are exsample only.
Each transceiver has own values.)
OPERATION
* * *
6 - 4
ADJUSTMENT
VALUE
ITEM
[RX LVA(Adjust)] 1.10 V
1.06 V
[TX LVA(Adjust)]
3.0–4.0 V
[LV (RX)]
2.5–3.5 V
[LV (TX)]
[RX LVA(Adjust)] 3.50 V
3.00 V
[TX LVA(Adjust)]
174.000000
[REF] MHz
(±50 Hz)
Lock voltage
appears here