Receiver Adjustment - Icom IC-F1610 Service Manual

5-4 RECEIVER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
RECEIVER 1 • Operating frequency : 136.000 MHz
SENSITIVITY • Connect an SSG to the antenna con-
nector and set as:
Level
Modulation : OFF
• Connect a 4 Ω load to the external
speaker jack.
• Enter Initial Set Mode No. 5.
Refer to page 5-2 for details.
• Receiving
NOISE 1 • Make sure no signal is being applied
SQUELCH to the antenna connector.
• Enter Initial Set Mode No. 2.
THRESHOLD
POINT Refer to page 5-2 for details.
• Operating frequency : 136.000 MHz
• Receiving
2 • Connect an SSG to the antenna con-
nector and set as:
Level
Deviation
Modulation : 1 kHz
• Receiving
BEEP 1 • Enter Initial Set Mode No. 3.
LEVEL Refer to page 5-2 for details.
• Operating frequency : Any
• Receiving
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
• MAIN UNIT
Number digits in the LCD
: 5.6 µV* (–92 dBm)
Speaker output
: 0.25 µV* (–119 dBm)
: ±3.5 kHz
Speaker output
5 - 4
MEASUREMENT
METHOD
Maximum indi-
cation
At
where the noise
audio just disap-
pears.
Squelch opens
ADJUSTMENT
VALUE ADJUST
Adjust in
sequence
L8, L11, L12, L13
on the MAIN unit
the point Rotate volume
control while
pushing
P
Verify
Desired level Rotate volume
control while
pushing
P
L8
Receiver
L11
sensitivity
L12
adjustment
L13
2
3