IC-910H Service manual - n7tgb

SOFTWARE ADJUSTMENT (continued)
ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION
TX POWER/
METER
(for 430 M)
7
• Connect an RF power meter to [UHF ANT]
connector.
CW
Push [RIT] key to strat transmitting.
8
CW
Tune the [MAIN DIAL] to 75 W (High
power). Push [RIT] key to store the
adjustment value into memory, and
to step next.
9
CW
Tune the [MAIN DIAL] to 37.5 W
(Middle power). Push [RIT] key to
store the adjustment value into
memory, and to step next.
10
CW
Verify the output power (Low) is 1–5
W, then push [RIT] key to step next.
ADJUSTMENT
ITEM (8)
DEVIATION
1
2
3
• Enter software adjustment mode (Refer
page 5-12).
• Push [8] key to enter the deviation adjustment.
• 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] connector
and set as:
Frequency : 1.0 kHz
Level : 20 mVrms
FM
FM
FMN
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.
4
• Apply no audio signals to [MIC] connector.
FM
T
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.
5
T
FM
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.
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