Software Adjustment - Icom IC-M88 Service Manual

5-2 SOFTWARE ADJUSTMENT

Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT
PLL LOCK 1 • Operating channel : center frequency
VOLTAGE • Receiving
2 • Operating channel : center frequency
• Connect the RF power meter or 50 Ω
dummy load to the antenna connector.
• Transmitting
1 • Operating channel : center frequency
REFERENCE
• Connect the RF power meter or 50 Ω
FREQUENCY
dummy load to the antenna connector.
• Transmitting
1 • Operating channel : center frequency
OUTPUT
• [H/L] switch
POWER
• Transmitting
2 • [H/L] switch
• Transmitting
3 • [H/L] switch
• Transmitting
4 • [H/L] switch
• Transmitting
1 • Operating channel : center frequency
FM
• Channel spacing
DEVIATION
• [H/L] switch
(Wide)
• Connect the audio generator to the
[MIC] jack and set as:
• Set the FM deviation meter as:
HPF
LPF
De-emphasis
Detector
• Transmitting
2 • Channel spacing
(Narrow)
• Transmitting
1 • Operating channel : center frequency
MODULATION
• Channel spacing
BARANCE
• [H/L] switch
(Wide)
• Set the DTCS as
• Transmitting
2 • Channel spacing
(Narrow)
• Transmitting
ADJUSTMENT CONDITION
: High
: Mid
: Low
: Extra low
: Wide
: High
1.0 kHz/200 mV rms.
: OFF
: 20 kHz
: OFF
: (P–P)/2
: Narrow
: Wide
: High
: Code 007
: Narrow
MEASUREMENT
UNIT LOCATION
MAIN Connect the
digital multimeter to
the check point LV.
Top Loosely couple the frequnecy
panel counter to the antenna connec-
tor.
Top Connect the RF power meter to
panel the antenna connector.
Top Connect the FM deviation meter
panel to the antenna
through the attenuator.
Top Connect the FM deviation meter
panel with an oscilloscope to the
antenna connector through the
attenuator.
5 - 4
VALUE
1.5–3.0 V (Verify)
1.8–3.3 V (Verify)
160.000000 MHz
5.0 W
3.0 W
0.75 W
0.45
±4.15–4.25 kHz
connector
±2.00–2.10 kHz
Set to flat wave
form
Set to flat wave
form