Icom ID-31A Service Manual page 20

5-3 TRANSMIT ADJUSTMENT (Continued)
• TRANSMIT POWER ADJUSTMENT (at 13.5 V)
Select an adjustment item using
ADJUSTMENT
ADJUSTMENT
TRANSMIT POWER
(Hi power)
[BAND LOW]
[BAND HIGH]
(Mid power)
[BAND LOW]
[BAND HIGH]
(Low power)
[BAND LOW]
[BAND HIGH]
(S-Low power)
[BAND LOW]
[BAND HIGH]
• DEVIATION ADJUSTMENTS
Select an adjustment item using
ADJUSTMENT
ADJUSTMENT
FM DEVIATION
[FM (BAND LOW)]
[FM-N (BAND HIGH)]
[FM (BAND LOW)]
[FM-N (BAND HIGH)]
REF DEVIATION
[FM (BAND LOW)]
[FM-N (BAND HIGH)]
[FM (BAND LOW)]
[FM-N (BAND HIGH)]
DV DEVIATION
[BAND LOW]
[BAND CENTER]
[BAND HIGH]
DV BALANCE
[BAND LOW]
[BAND CENTER]
[BAND HIGH]
/
, and then set the adjustment value as specifi ed using [DIAL].
ITEM
1 1) Set the power supply voltage to 13.5 V. (supplying from [DC IN])
–
2) Connect an RF power meter to the antenna connector.
2 • While transmitting, adjust the TX power using [DIAL], and then
push [ENT] to store the adjustment value.
3
4
5
[PO1]
6
7
8
9
/
, and then set the adjustment value as specifi ed using [DIAL].
ITEM
1 1) Set the power supply voltage to 7.4 V.
2) Connect a modulation analyzer to the antenna connector through
an attenuator, and set it as;
HPF
–
LPF
De-emphasis : OFF
Detector
3) Connect an audio generator to the JIG cable (See page 5-1).
[MFL] 2 1) Set the audio generator as;
Frequency
[MNL] 3
Level
[MFH] 4
2) While transmitting, adjust the deviation using [DIAL], and then
[MNH] 5 push [ENT] to store the adjustment value.
1 1) Set the audio generator as;
[BFL]
Level
2) While transmitting, adjust the deviation using [DIAL], and then
[BNL] 2
push [ENT] to store the adjustment value.
[BFH] 3
[BNH] 4
1 1) Set the power supply voltage to 7.4 V.
2) Connect a modulation analyzer to the antenna connector through
an attenuator, and then set it as;
HPF
–
LPF
De-emphasis : OFF
Detector
3) No audio signal is applied.
2 • While transmitting, adjust the deviation using [DIAL], and then
push [ENT] to store the adjustment value.
[DVV] 3
4
1 1) Set the power supply voltage to 7.4 V.
2) Connect a modulation analyzer to the antenna connector through
an attenuator, and then set it as;
HPF
–
LPF
De-emphasis : OFF
Detector
3) No audio signal is applied.
2 • While transmitting, adjust the deviation using [DIAL], and then
push [ENT] to store the adjustment value.
[DVR] 3
4
OPERATION
OPERATION
: OFF
: 20 kHz
: (P-P)/2
: 1 kHz
: 90 mVrms
: 0 mVrms (OFF)
: OFF
: 20 kHz
: (P-P)/2
: OFF
: 20 kHz
: (P-P)/2
5 - 5
VALUE
–
4.8–5.2 W
2.3–2.7 W
0.4–0.6 W
80–120 mW
VALUE
–
±4.1 to ±4.3 kHz
±2.0 to ±2.2 kHz
±4.1 to ±4.3 kHz
±2.0 to ±2.2 kHz
Minimum
deviation
–
±0.95 to ±1.15
kHz
–
Minimum
deviation