Icom IC-M21 Service Manual - page 16
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• Operating channel : ch16
• Output power
: Low
• Connect an RF power meter or a 50
Ω
dummy load to the antenna connector.
• Transmitting
• Operating channel : ch16
• Output power
: Hi
• Transmitting
• Output power
: Mid.
• Transmitting
• Output power
: Low
• Transmitting
• Output power
: Extra-Low
• Transmitting
• Operating channel : ch16
• Output power
: Low
• Connect an audio generator to the [MIC]
jack and set as:
1 kHz/25 mV
• Set an FM deviation meter as:
HPF
: OFF
LPF
: 20 kHz
De-emphasis
: OFF
Detector
: (P–P)/2
• Transmitting
• Operating channel : ch16
• Set an SSG as:
Frequency
: 156.8 MHz
(ch. 16)
Level
: 0.63 µV*
(–111 dBm)
Modulation
: 1 kHz
Deviation
: ±3.5 kHz
• Receiving
• Receving
• Operating channel : ch16
• Set an SSG as:
Frequency
: 156.8 MHz
(ch. 16)
Level
: 1 µV*
(–107 dBm)
Modulation
: 1 kHz
Deviation
: ±3.5 kHz
• Receiving
REFERENCE
FREQUENCY
[Fr]
OUTPUT
POWER
[Po H] (Hi)
[Po M] (Mid.)
[Po L] (Low)
[Po ML] (Extra-
Low)
FM
DEVIATION
[dE]
SQUELCH
LEVEL
[nL]
S-METER
[SL]
Top
Panel
Top
panel
Top
panel
Top
panel
Top
panel
Loosely couple the frequency
counter to the antenna connec-
tor.
Connect an RF power meter to
the antenna connector.
Connect an FM deviation meter
to the antenna connector
through an attenuator.
Connect an SSG to the antenna
connector and a SINAD meter
with 8
Ω
load to the [SP] jack.
Connect an SSG to the antenna
connector and a SINAD meter
with 8
Ω
load to the [SP] jack.
156.8000 MHz
5.0 W
3.0 W
0.8 W
0.45 W
±4.3 kHz
12 dB SINAD
At the point where
the signals just
appears.
Push [
Y
] or [
Z
] key,
then S-METER is
adjusted automati-
cally.
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT
LOCATION
5-3 ADJUSTMENT MODE ADJUSTMENTS
Select an operation using [16] key, then set specified value using [
Y
] / [
Z
] keys on the transceiver’s front panel.
*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.