Icom IC-M72 Service Manual page 17

5-3 SOFTWARE ADJUSTMENT (RECEIVE AND TRANSMIT)
Select the adjustment item with [↑] / [↓] keys, then set the value with [←] / [→] keys on the connected PC.
NOTE: "RECEIVE SENSITIVITY" should be adjusted before "SQUELCH LEVEL," or "SQUELCH LEVEL"
ADJUSTMENT
RECEIVE 1 • Operating CH. : 16
SENSITIVITY • Conne ct t he st and ard sig nal
[BPF T1]
[BPF T2]
• Receiving
CONVENIENT:
RECEIVE SENSITIVITY can be adjusted automatically.
1. Put the cursor on the [BPF ALL Sweep] on the CS-M72 ADJ's screen and push the [ENTER] key.
2. The connected PC tunes BPF T1 and T2 to peak level automaticaly.
1. Put the cursor on the one of BPF T1 and T2 as desired.
2. Push the [ENTER] key to start tuning.
3. Repeat 1 and 2 to perform additional BPF tuning.
SQUELCH Need to adjust "SQUELCH LEVEL" after "RECEIVE SENSITIVITY" is adjusted. Otherwise, "SQUELCH
LEVEL LEVEL" will not be adjusted properly.
[NOISE]
1 • Operating CH.
• Con nec t the s ta ndar d si gn al
• Receiving
TRANSMIT 1 • Operating CH.
OUTPUT POWER • RF power
[RF Power (High)] • Transmitting
[RF Power (Middle)] 2 • Operating CH.
• RF power
• Transmitting
[RF Power (Low)] 3 • Operating CH.
• RF power
• Transmitting
FM DEVIATION 1 • Operating CH.
[MOD] • Set the FM deviation meter as;
• Connect the audio generator to
and set as;
• Transmitting
VOX 1 • Operating CH.
• Set to VOX mode.
[VOX]
• No audio applied to the [SP MIC] jack.
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
ADJUSTMENT CONDITION
generator to the antenna connector
and set as;
Frequency : 156.8000 MHz
Level : +20 dBµ* (–87 dBm)
Modulation : 1 kHz
Deviation : ±3.0 kHz
or
: 16
generator to the antenna connector
and set as;
Frequency : 156.8000 MHz
Level : –4 dBµ* (–111 dBm)
Modulation : 1 kHz
Deviation : ±3.0 kHz
: 16
: High
: 16
: Middle
: 16
: Low
: 16
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
the [MIC/SP] jack through OPC-973
Frequency : 1 kHz
Level : 25 mV rms
: 16
(Push and hold [ ], then push
[H/L•LOCK])
MEASUREMENT
UNIT OPERATION
Top Connect the distortion meter
with an 8 Ω load to the [MIC/
pannel
SP] jack through the JIG
cable.
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
panel meter to the antenna con-
nector through the attenuator.
PC Push the [ENTER] key on the
screen
keyboad of the connected PC.
5 - 5
will not be adjusted properly.
VALUE
Minimum distortion level
Automatic
adjustment
5.6 W
(Except [AUS], [AUS-1])
4.7 W
([AUS], [AUS-1])
3.0 W
0.75 W
±4.30–4.40 kHz
Automatic
adjustment