Icom IC-910H, Service Manual

Page: 75 / 144

5 - 17
SOFTWARE ADJUSTMENT (continued)
TX POWER/
METER
(for 430 M)
ADJUSTMENT
ITEM (8)
DEVIATION
ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION
• Connect an RF power meter to [UHF ANT]
connector.
• Enter software adjustment mode (Refer
page 5-12).
• Push [8] key to enter the deviation adjust-
ment.
• MIC gain : Center
• Connect an FM deviation meter to [VHF
ANT] connector through an attenuator and
set as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Connect an audio generator to [MIC] con-
nector and set as:
Frequency : 1.0 kHz
Level : 20 mVrms
• Apply no audio signals to [MIC] connector.
7
8
9
10
1
2
3
4
5
Push [RIT] key to strat transmitting.
Tune the [MAIN DIAL] to 75 W (High
power). Push [RIT] key to store the
adjustment value into memory, and
to step next.
Tune the [MAIN DIAL] to 37.5 W
(Middle power). Push [RIT] key to
store the adjustment value into
memory, and to step next.
Verify the output power (Low) is 1–5
W, then push [RIT] key to step next.
Push [RIT] key to strat transmitting.
Tune the [MAIN DIAL] to ±4.5 kHz
FM deviation. Push [RIT] key to
store the adjustment value into
memory, and to step next.
Tune the [MAIN DIAL] to ±2.25 kHz
FM deviation. Push [RIT] key to
store the adjustment value into
memory, and to step next.
Tune the [MAIN DIAL] to ±0.6 kHz
CTCSS tone deviation. Push [RIT]
key to store the adjustment value
into memory, and to step next.
Tune the [MAIN DIAL] to ±0.6 kHz
europe tone deviation. Push [RIT]
key to store the adjustment value
into memory.
Then turn power OFF and ON to
return the normal operation mode.
CW
CW
CW
CW
FM
FM
FMN
FM
T
FM
T