Frequency Adjustment - Icom IC-F4021T Service Manual

6-2 FREQUENCY ADJUSTMENT

Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC's keyboard.
ADJUSTMENT ADJUSTMENT CONDITION
PLL LOCK 1 • Channel
VOLTAGE • Receiving
[RX LVA]
[TX LVA] 2 • Channel
• Transmitting
CONVENIENT:
1: Set the Lock voltage preset ([RX LVA] and [TX LVA]) to "179 (3.15 V)."
2: Push the [ENTER] key on the connected PC's keyboard.
1 • Channel
• Receiving
2 • Channel
• Transmitting
REFERENCE 1 • Channel
FREQUENCY
[REF]
• Connect an RF power meter to the
antenna connector.
• Transmitting
: CH 1
screen
: CH 1
The " PLL LOCK VOLTAGE" can be adjusted automatically.
: CH 2
screen
: CH 2
: CH 1
6 - 4
MEASUREMENT
UNIT OPERATION
PC Click [Reload (F5)] button, then
check the "LVIN" item on the
CS-F3020 ADJ's screen as below.
PC Click [Reload (F5)] button, then
check the "LVIN" item on the
CS-F3020 ADJ's screen.
Top Loosely couple a frequency
panel counter to the antenna connector.
VALUE
1.2 V
2.8–4.0 V
[Low band]
3.0–4.2 V
[High band]
(Verify)
3.0–4.2 V
[Low]/[High] bands
(Verify)
470.000 MHz
[Low band]
512.000 MHz [USA]
520.000 MHz [GEN]
[High band]