Receiver Adjustment - Icom IC-F2610 Service Manual

5-4 RECEIVER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
RECEIVER 1 • Operating frequency : 440.000 MHz
SENSITIVITY • Enter Initial Set Mode No. 5.
Refer to page 5-2 for details.
• Connect a standard signal generator
to the antenna connector and set as:
Level
Modulation : OFF
• Connect a 4 Ω load to the external
speaker jack.
• Receiving
NOISE 1 • Operating frequency : 136.000 MHz
SQUELCH • Enter Initial Set Mode No. 2.
THRESHOLD Refer to page 5-2 for details.
POINT • Make sure no signal is being applied to
the antenna connector.
• Receiving
2 • Connect an SSG to the antenna con-
nector and set as:
Level
Deviation
Modulation : 1 kHz
• Receiving
BEEP 1 • Operating frequency : Any
• Enter Initial Set Mode No. 3.
LEVEL
Refer to page 5-2 for details.
• Receiving
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
Number digits in the LCD
: 5.6 µV* (–92 dBm)
Speaker output
: 0.32 µV* (–117 dBm)
: ±3.5 kHz
Speaker output
5 - 4
MEASUREMENT
METHOD
Maximum indi-
cation
At
where the noise
audio just disap-
pears.
Squelch opens.
DC power supply
13.2 V/15 A
ADJUSTMENT
VALUE ADJUST
Adjust in sequence
L8, L9, L11, L12,
L13 on the MAIN
unit.
the point Rotate volume
control
pushing
P
Verify
Desired level Push
P
3
select the beep
level.
L8
L9
Sensitivity
L11
adjustment
L12
L13
while
.
2
to