Icom ID-51A Service Manual - Page 24

Dial], Transmit, Power, Idling Current, Transmit Power, Band Low, Band High, Hi Power, Low2 Power

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5-3 TRANSMIT ADJUSTMENT (Continued) • TRANSMIT POWER ADJUSTMENT (at 5.5 V) Select an adjustment item using / , and then set the adjustment value as specified using [DIAL]. ADJUSTMENT ADJUSTMENT ITEM OPERATION TRANSMIT POWER -VHF(BAND LOW) (BAND HIGH) [PO5] 1 1) Set the power supply voltage to 5.5 V. 2) Connect an RF power meter to the antenna connector. 2 3) While transmitting, adjust the TX power using [DIAL], and then push to store the adjustment value. 3 -UHF- 4 (BAND LOW) (BAND HIGH) 5 NOTE: When "IDLING CURRENT" is adjusted, "TRANSMIT POWER" must be also re-adjusted. VALUE 80-120 mW • TRANSMIT POWER ADJUSTMENT (at 7.4 V) Select an adjustment item using / , and then set the adjustment value as specified using [DIAL]. ADJUSTMENT ADJUSTMENT ITEM OPERATION TRANSMIT POWER -VHF(Hi power) [BAND LOW] 1 1) Set the power supply voltage to 7.4 V. 2) Connect an RF power meter to the antenna connector. 2 • While transmitting, adjust the TX power using [DIAL], and then push to store the adjustment value. [BAND HIGH] 3 -UHF- 4 (Hi power) [BAND LOW] [BAND HIGH] 5 -VHF- 6 (Mid power) [BAND LOW] [BAND HIGH] 7 -UHF- 8 (Mid power) [BAND LOW] [BAND HIGH] 9 -VHF- 10 (Low2 power) [BAND LOW] [BAND HIGH] 11 -UHF- 12 (Low2 power) [BAND LOW] [BAND HIGH] 13 -VHF- 14 (Low1 power) [BAND LOW] [BAND HIGH] 15 -UHF- 16 (Low1 power) [BAND LOW] [BAND HIGH] 17 -VHF- 18 (S-Low power) [BAND LOW] [BAND HIGH] 19 -UHF- 20 (S-Low power) [BAND LOW] [BAND HIGH] 21 VALUE - 4.8-5.2 W 2.3-2.7 W 0.9-1.1 W 0.4-0.6 W 80-120 mW 5 - 6

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5 - 6
5-3 TRANSMIT ADJUSTMENT (Continued)
• TRANSMIT POWER ADJUSTMENT (at 5.5 V)
Select an adjustment item using
/
, and then set the adjustment value as specified using
[DIAL]
.
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION
VALUE
TRANSMIT
POWER
[PO5]
1
1) Set the power supply voltage to 5.5 V.
2)
Connect an RF power meter to the antenna connector.
3)
While transmitting, adjust the TX power using
[DIAL
], and then
push
to store the adjustment value.
80–120 mW
-VHF-
(BAND LOW)
2
(BAND HIGH)
3
-UHF-
(BAND LOW)
4
(BAND HIGH)
5
NOTE:
When "
IDLING CURRENT
" is adjusted, "
TRANSMIT POWER
" must be also re-adjusted.
• TRANSMIT POWER ADJUSTMENT (at 7.4 V)
Select an adjustment item using
/
, and then set the adjustment value as specified using
[DIAL]
.
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION
VALUE
TRANSMIT POWER
1
1)
Set the power supply voltage to 7.4 V.
2)
Connect an RF power meter to the antenna connector.
–
-VHF-
(Hi power)
[BAND LOW]
2
•
While transmitting, adjust the TX power using
[DIAL]
, and then
push
to store the adjustment value.
4.8–5.2 W
[BAND HIGH]
3
-UHF-
(Hi power)
[BAND LOW]
4
[BAND HIGH]
5
-VHF-
(Mid power)
[BAND LOW]
6
2.3–2.7 W
[BAND HIGH]
7
-UHF-
(Mid power)
[BAND LOW]
8
[BAND HIGH]
9
-VHF-
(Low2 power)
[BAND LOW]
10
0.9–1.1 W
[BAND HIGH]
11
-UHF-
(Low2 power)
[BAND LOW]
12
[BAND HIGH]
13
-VHF-
(Low1 power)
[BAND LOW]
14
0.4–0.6 W
[BAND HIGH]
15
-UHF-
(Low1 power)
[BAND LOW]
16
[BAND HIGH]
17
-VHF-
(S-Low power)
[BAND LOW]
18
80–120 mW
[BAND HIGH]
19
-UHF-
(S-Low power)
[BAND LOW]
20
[BAND HIGH]
21