Icom IC-M73 Service Manual page 17

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