Receiver Adjustment; Beep - Icom IC-F2610 Service Manual

5-4 RECEIVER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
RECEIVER 1 • Operating freq. : 400.000 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 freq. : 400.000 MHz
SQUELCH
THRESHOLD
POINT • Enter Initial Set Mode No. 2.
Refer to page 5-2 for details.
• 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 freq. : Any
LEVEL • Enter Initial Set Mode No. 3.
Refer to page 5-2 for details.
• Receiving
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
[L]: [L-band (400–430 MHz)], [M]: [M-band (440–490 MHz)], [H]: [H-band (490–520 MHz)]
• MAIN UNIT
[L] Number digits in the LCD
440.000 MHz [M]
490.000 MHz [H]
: 5.6 µV* (–92 dBm)
[L] Speaker output
440.000 MHz [M]
490.000 MHz [H]
: 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.
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
select the beep
level.
L8
L9
Sensitivity
L11
adjustment
L12
L13
while
.
2
to
3