Main Unit - Icom IC-F2721 Service Manual

5-3 SOFT WARE ADJUSTMENT
Select an operation using [↑] / [↓] keys, then set specifi ed value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT ADJUSTMENT CONDITION
PLL LOCK 1 • Operating CH.
VOLTAGE • Preset LV(RX1)
[LV (RX LVA1)] • Receiving
[LV (RX LVA2)]
2 • Operating CH.
[LV (TX LVA)]
• Preset LV(RX2)
• Receiving
3 • Operating CH.
• Preset LV(TX)
• Transmitting
CONVENIENT:
The PLL lock voltage can be adjustment automatically.
Set the cursor to "RX LVA"/"TX LVA" and then push [ENTER] key.
REFERENCE 1 • Operating CH.
• Connect an RF power meter or 50 Ω
FREQUENCY
[REF] dummy load to the antenna connector.
• Transmitting
DSP 1 • Operating CH.
• Connect an RF power meter or 50 Ω
FREQUENCY
[Dig REF] dummy load to the antenna connector.
(IC-F2721D/ • Transmitting
F2821D only)
BASE BAND 1 • Operating CH.
FREQUENCY • Preset Dig Mode
• Connect an RF power meter or 50 Ω
[Dig DA]
(IC-F2721D/ dummy load to the antenna connector.
F2821D only) • Transmitting

• MAIN UNIT

UNIT
: CH 1 PC
: 34 [0.67 V] screen
: CH 8
: 34 [0.67 V]
: CH 1
: 51 [1.00 V] [L]
34 [0.67 V] [H]
: CH 12 Rear
panel
: CH 14 MAIN
unit
: CH 14 Rear
: 13 panel
5 - 5
MEASUREMENT
LOCATION
Check the "LVIN" item on the
CS-F70/F1700 ADJ's screen.
Loosely couple a frequency
counter to the antenna connec-
tor.
Connect a frequency counter to
CP19.
Loosely couple a frequency
counter to the antenna connec-
tor.
CP19: DSP frequency
VALUE
0.67 V
0.67 V
1.00 V [L]
0.67 V [H]
470.0000 MHz [L]
520.0000 MHz [H]
12.288000 MHz
470.0000 MHz [L]
520.0000 MHz [H]
check point