5 - 3
L18
L19
Sensitivity
adjustment
• MAIN unit
R92
Squelch adjustment
Bottom view
Top view
S
Sensitivity check point
5-3 RECEIVER ADJUSTMENT
SENSITIVITY
S-METER
SQUELCH
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
Maximum level
0.89–0.28 µV
(–106 to –118 dBm)
At the point
where the AF
signals just
disappear.
1
1
2
1
• Operating freq.
: 146.000 MHz
• Connect an SSG to the antenna con-
nector and set as:
Frequency
: 146.000 MHz
Level
: 1 µV* (–107 dBm)
Modulation
: 1 kHz
Deviation
: ±3.5 kHz
• Receiving
• Operating freq.
: 146.000 MHz
• Connect the “JIG” to the [SP] jack.
• Connect an SSG to the antenna con-
nector and set as:
Frequency
: 146.000 MHz
Level
: 0.5 µV* (–113 dBm)
Modulation
: OFF
• Receiving
• Set an SSG output level for the S-
meter to S3 (3 dot).
• Operating freq.
: 146.000 MHz
• SQL set
: Auto
• Connect an SSG to the antenna con-
nector and set as:
Frequency
: 146.000 MHz
Level
: 0.1 µV* (–127 dBm)
Modulation
: 1 kHz
Deviation
: ±3.5 kHz
• Receiving
MAIN
Front
panel
SSG
Spea
ker
Connect a digital volt-
meter to check point S.
LCD
Output level
MAIN
Front
panel
MAIN
Adjust in
sequence
L18, L19
Verify
R92
Push and
hold the
[ ]
switch.
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.
