Frequency Adjustments - Icom IC-F2000 Service Manual

5-2 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, and then push [ENTER].
TRANSCEIVER'S
ADJUSTMENT
PLL LOCK 1
VOLTAGE
-Preparation-
-ADJUSTMENT- 2 • Select the item [RX LVA Start], then push [ENTER] to enter the
(RX Band low) lock voltage adjustment mode.
3 • Channel:
• Receiving
(RX Band high) 4 • Channel:
• Receiving
NOTE: Only when the lock voltage is not the specifi ed value, perform the following adjustment.
5 • Channel:
• Receiving
6 • Select the item [RX LVA Start], then push [ENTER] to quit the
lock voltage adjustment mode.
(TX Band low) 7 • Select the item [TX LVA Start], then push [ENTER] to enter the
lock voltage adjustment mode.
8 • Channel:
• Transmitting
(TX Band high) 9 • Channel:
• Transmitting
10 • Select the item [TX LVA Start], then push [ENTER] to quit the
lock voltage adjustment mode.
PLL LOCK 1 • Channel:
VOLTAGE • Receiving
-Verify-
(RX Band low)
(RX Band high) 2 • Channel:
• Receiving
(TX Band low) 3 • Channel:
• Transmitting
(TX Band high) 4 • Channel:
• Transmitting
REFERENCE 1 • Channel:
FREQUENCY • Transmitting
CONDITION
1) Connect an RF power meter to the
antenna connector.
– 2) Set the preset adjustment value on the
adjustment utility window.
1-1 • Select the item [LV (RX LVA FL)], then
push [ENTER].
1-2 • Select the item [LV (RX LVA FH)], then
push [ENTER].
1-2 • Select the item [RX LVA FH], then push
[ENTER].
1-1 • Select the item [LV (TX LVA FL)], then
push [ENTER].
1-2 • Select the item [LV (TX LVA FH)], then
push [ENTER].
1-3 • Click the [Reload (F5)] button to check on
the "I/O Check window" as below.
1-4
1-3
1-4
1-5 • Loosely couple a frequency counter to the
antenna connector.
• I/O Check window
* * *
(The values shown above are only examples.
Each transceiver has own values.)
OPERATION
Lock voltage
5-4
ADJUSTMENT
VALUE
ITEM
LV (RX LVA FL) 51
LV (TX LVA FL)
LV (RX LVA FH) 158
LV (TX LVA FH) 194
–
[RX LVA Start]
1.0 V
[LV (RX LVA FL)]
3.1 V
[LV (RX LVA FH)]
3.2 V ±0.1 V
[RX LVA FH]
–
[RX LVA Start]
–
[TX LVA Start]
1.0 V
[LV (TX LVA FL)]
3.8 V
[LV (TX LVA FH)]
–
[TX LVA Start]
[LVIN] 1.0 V ±0.1 V
(On the "I/O (Verify)
Check window")
3.1 V ±0.2 V
(Verify)
1.0 V ±0.1 V
(Verify)
3.8 V ±0.2 V
(Verify)
470.000000
[REF] MHz
(±500 Hz)