Icom IC-M73

5 - 4
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT OPERATION
RECEIVE
SENSITIVITY
[BPF T1]
[BPF T2]
1 • Operating CH. : 16
• Connect the SSG to the antenna
connector, and then set it as;
Frequency : 156.8000 MHz
Level : +30 dBu* (–77 dBm)
Modulation : 1 kHz
Deviation : ±3.0 kHz
• Receiving
Top
pannel
Put the cursor on the [BPF
ALL Sweep] on the ADJ-
M73's screen, and push the
[ENTER] key.
Automatic
adjustment
SQUELCH
LEVEL
[SQL Threshold]
“RECEIVE SENSITIVITY” must be adjusted before "SQUELCH LEVEL" is adjusted. Otherwise,
"SQUELCH LEVEL" will not be properly adjusted.
1 • Operating CH. : 16
• Connect the SSG to the antenna
connector, and then set it as;
Frequency : 156.8000 MHz
Level* : –12dBu (–119 dBm)*¹
–11 dBu (–118 dBm)*²
Modulation : 1 kHz
Deviation
: ±3.0 kHz
• Receiving
Top
panel
Push the [ENTER] key on the
keyboad of the connected PC.
Automatic
adjustment
[SQL Tight] 2• Set the SSG as;
Frequency : 156.8000 MHz
Level* : –4 dBu (–111 dBm)*¹
–3 dBu (–110 dBm)*²
TRANSMIT
OUTPUT POWER
[RF Power (High)]
1 • Operating CH. : 16
• RF power : High
• Transmitting
Top
panel
Connect the RF power meter
to the antenna connector.
5.6 W
(Except [AUS], [AUS-1])
4.7 W
([AUS], [AUS-1])
[RF Power (Mid-
dle)]
2 • Operating CH. : 16
• RF power : Middle
• Transmitting
3.0 W
[RF Power (Low)] 3 • Operating CH. : 16
• RF power : Low
• Transmitting
0.75 W
[RF Power (E-Low)] 4 • Operating CH. : 16
• RF power : Low
• Transmitting
0.45 W
FM DEVIATION
[MOD]
1 • Operating CH. : 16
• Set the FM deviation meter as;
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Connect the audio generator to
the [SP/MIC] jack, through OPC-
922, and then set it as;
Frequency : 1 kHz
Waveform : Sin
Level : 25 mV rms
• Transmitting
Top
panel
Connect the FM deviation me-
ter to the antenna con-nector,
through the attenuator.
±4.30–4.40 kHz
5-3 SOFTWARE ADJUSTMENT (RECEIVE AND TRANSMIT)
1) Select an adjustment item using [
↑
]/[
↓
] on the PC’s keyboard.
2) Set or modify the adjustment value as specifi ed using [
←
]/[
→
] on the PC’s keyboard, and then push [ENTER].
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
*¹; For [USA], [EXP] and [AUS] versions.
*²; Except [USA], [EXP] and [AUS] versions.