Receiver Adjustment - Icom IC-T2H Service Manual

5-3 RECEIVER ADJUSTMENT

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