Frequency Adjustments - Icom IC-F24/S Service Manual Addendum

5-2 FREQUENCY ADJUSTMENT
5-2-1 FREQUENCY ADJUSTMENT FOR OTHER THAN IC-F26-L
1) Select an adjustment item using cursor or [↑] / [↓] keys of the PC's keyboard.
2) Set or modify the adjustment value as specifi ed using [←] / [→] keys of the PC's keyboard, then push the [ENTER] key.
ADJUSTMENT ADJUSTMENT CONDITION
PLL LOCK 1 <For IC-F24S/F25S/F26S only>
VOLTAGE
Clone the "ADJ CH FREQ_TXPWR.icf" into the transceiver.
-Preparation-
• Connect an RF Power Meter to
the antenna.
-Adjust- 2 • CH. (16CH/2CH) : CH.1/CH.1
RX • Receiving
TX 3 • CH. (16CH/2CH) : CH.1/CH.1
• Transmitting
LOCK 1
<For IC-F24S/F25S/F26S only>
VOLTAGE
Clone the "ADJ CH FREQ_TXPWR.icf" into the transceiver.
VERIFICATION
• CH. (16CH/2CH) : CH.2/CH.2
• Receiving
RX
TX 2 • CH. (16CH/2CH) : CH.2/CH.2
• Transmitting
REFERENCE 1 • Connect an RF Power Meter to
FREQUENCY the antenna.
2 • CH. (16CH/2CH) : CH.2/CH.2
• Transmitting
OPERATION
–
• Monitoring lock voltage at the "LVIN"
in the "ADJUSTMENT WINDOW"
(see the previous page), adjust the
[RX LVA] using [←] / [→] keys on the
PC's keyboard.
or
• Set the [RX LVA] to "51", then push
the [ENTER] key.
• Monitoring lock voltage at the "LVIN"
in the "ADJUSTMENT WINDOW"
(see the previous page), adjust the
[TX LVA] using [←] / [→] keys on the
PC's keyboard.
or
• Set the [TX LVA] to "51", then push
the [ENTER] key.
• Verify the lock voltage at the "LVIN"
in the "ADJUSTMENT WINDOW"
(see the previous page).
–
1) Adjust the frequency using [←] / [→]
keys on the PC's keyboard.
2) Push the [ENTER] key to store the
adjust value.
5 - 6
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
[LVIN]
(Verify)
– –
469.9000 MHz
[Low band]
[REF]
511.9000 MHz
[High band]