Frequency Adjustments - Icom IC-F4011 Service Manual

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5-2 FREQUENCY ADJUSTMENT
1) Select an adjustment item using cursor or [↑] / [↓] of the PC's keyboard.
2) Set or modify the adjustment value as specifi ed using [←] / [→] of the PC's keyboard, then push [ENTER].
ADJUSTMENT
ADJUSTMENT CONDITION
PLL LOCK
1
VOLTAGE
RX
2 • Channel
• Receiving
TX
3 • Channel
• Transmitting
LOCK
1
VOLTAGE
VERIFICATION
RX
2 • Channel
• Receiving
TX
3 • Channel
• Transmitting
REFERENCE
1
FREQUENCY
2 • Channel
• Transmitting
• Connect an RF power meter to the
antenna.
: CH.1
• Adjust the [RX LVA] using [←] / [→]
on the PC's keyboard until the "LVIN"
in the "ADJUSTMENT WINDOW"
shows the specifi ed value, then push
[ENTER].
• Set the [RX LVA] to "51", then push
[ENTER].
: CH.1
• Adjust the [TX LVA] using [←] / [→]
on the PC's keyboard until the "LVIN"
in the "ADJUSTMENT WINDOW"
shows the specifi ed value, then push
[ENTER].
• Set the [TX LVA] to "51", then push
[ENTER].
• Connect an RF power meter to the
antenna.
: CH.2
• Verify the lock voltage displayed at
the "LVIN" in the "ADJUSTMENT
WINDOW" (see the previous page).
: CH.2
• Loosely couple a frequency counter
to the antenna connector.
: CH.2
1) Adjust the frequency using [←] / [→]
on the PC's keyboard.
2) Push [ENTER] to store the adjust
value.
5 - 4
OPERATION
or
or
ADJUSTMENT
VALUE
ITEM
[RX LVA]
1.0 V
(at the "LVIN"
item)
or
"51"
(at the [RX/TX
LVA])
[TX LVA]
3.3–4.5 V
(Verify)
3.3–4.5 V
[LVIN]
[Low band]
3.0–4.2 V
[High band]
(Verify)
470.0000 MHz
[Low band]
[REF]
512.0000 MHz
[High band]

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