Frequency Adjustment - Icom IC-F5121D 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
• Receiving
(TX) 4 • Channel
• Transmitting
REFERENCE 1 • Channel
FREQUENCY • Transmitting
CONDITION
: 1-1 1) Connect an RF power meter to the
antenna 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
: 1-5 • 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)] 1.1 V
[TX LVA(Adjust)]
3.0–4.0 V
[LVIN]
(Verify)
(On the "I/O
2.5–3.5 V
Check window")
(Verify)
174.000000
[REF] MHz
(±250 Hz)
Lock voltage
appears here