Icom IC-M2A Service Manual page 16

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.
ADJUSTMENT
REFERENCE 1 • Operating channel : ch16
FREQUENCY • Output power
• Connect an RF power meter or a 50 Ω
[Fr]
dummy load to the antenna connector.
• Transmitting
OUTPUT 1 • Operating channel : ch16
POWER • Output power
[Po H] (Hi) • Transmitting
[Po M] (Mid.) 2 • Output power
• Transmitting
[Po L] (Low) 3 • Output power
• Transmitting
[Po ML] (Extra- 4 • Output power
Low) • Transmitting
FM 1 • Operating channel : ch16
DEVIATION • Output power
[dE] • Connect an audio generator to the [MIC]
jack and set as:
1 kHz/25 mV
• Set an FM deviation meter as:
HPF
LPF
De-emphasis
Detector
• Transmitting
SQUELCH 1 • Operating channel : ch16
LEVEL • Set an SSG as:
[nL] Frequency
Level
Modulation
Deviation
• Receiving
2 • Receving
S-METER 1 • Operating channel : ch16
[SL] • Set an SSG as:
Frequency
Level
Modulation
Deviation
• Receiving
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
ADJUSTMENT CONDITION
: Low
: Hi
: Mid.
: Low
: Extra-Low
: Low
: OFF
: 20 kHz
: OFF
: (P–P)/2
: 156.8 MHz
(ch. 16)
: 0.63 µV*
(–111 dBm)
: 1 kHz
: ±3.5 kHz
: 156.8 MHz
(ch. 16)
: 1 µV*
(–107 dBm)
: 1 kHz
: ±3.5 kHz
MEASUREMENT
UNIT LOCATION
Top Loosely couple the frequency
Panel counter to the antenna connec-
tor.
Top Connect an RF power meter to
panel the antenna connector.
Top Connect an FM deviation meter
panel to the antenna
through an attenuator.
Top Connect an SSG to the antenna
panel connector and a SINAD meter
with 8 Ω load to the [SP] jack.
Top Connect an SSG to the antenna
panel connector and a SINAD meter
with 8 Ω load to the [SP] jack.
5 - 4
VALUE
156.8000 MHz
5.0 W
3.0 W
0.8 W
0.45 W
±4.3 kHz
connector
12 dB SINAD
At the point where
the signals just
appears.
Push [Y] or [Z] key,
then S-METER is
adjusted automati-
cally.