Receive Adjustment - Icom ID-31A Service Manual

5-4 RECEIVE ADJUSTMENTS
1) Select an adjustment item (band) using
2) Set the SSG as specifi ed (frequency, deviation and output level), and then push
ADJUSTMENT
ADJUSTMENT
RECEIVE NOTE:
SENSITIVITY
400.02 MHz
435.02 MHz
478.95 MHz
S-METER NOTE: "RECEIVE SENSITIVITY" must be adjusted before "S-METER" and "S-METER S3 LEVEL." Otherwise,
S0 level
S3 level
Full scale
SQUELCH
[FM]
[FM-N]
†
; This output level of a standard signal generator (SSG) is indicated as SSG's open circuit.
/
.
ITEM
"RECEIVE SENSITIVITY" must be adjusted before "S-METER." Otherwise, "S-METER" will
not be adjusted properly.
1 1) Set the power supply voltage to 7.4 V.
–
2) Connect an SSG to the antenna connector, and then set it as;
Frequency
[UTL] 2
Level
[UTM] 3
Modulation
[UTH] 4
Deviation
"S-METER" and "S-METER S3 LEVEL will not be adjusted properly.
1 1) Set the power supply voltage to 7.4 V.
2) Connect an SSG to the antenna connector and set it as;
–
Modulation
Deviation
2 • Set the SSG as;
[USO] Frequency
Level
3 • Set the SSG as;
[US3]
Level
4 • Set the SSG as;
[USF]
Level
1 1) Set the power supply voltage to 7.4 V.
2) Connect an SSG to the antenna connector and set as;
Modulation
Deviation
2 • Set the SSG as;
[SQL]
Frequency
Level
3 • Set the SSG as;
Frequency
Level
to automatically adjust.
OPERATION
: (Displayed on the function display)
†
: –10 dBµ (–117 dBm)
: 1 kHz
: 3.5 kHz
: 1 kHz
: 3.5 kHz
: (Displayed on the function display)
†
: –10 dBµ (–117 dBm)
†
: –6 dBµ (–113 dBm)
†
: +10 dBµ (–97 dBm)
: 1 kHz
: 1.75 kHz
: (Displayed on the function display)
†
: OFF
: (Displayed on the function display)
†
: –24 dBµ (–131 dBm)
5 - 7
VALUE
Push .
(Automatic
adjustment)
–
Push .
(Automatic
adjustment)
–
Push .
(Automatic
adjustment)