Icom IC-905, Основное руководство

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3-9
BASIC MANUAL
3
BASIC OPERATION
RF gain and SQL level
1. Push .
2. Touch an item to adjust. (Example: RF GAIN)
3. Rotate .
RF gain
You can adjust the receive sensitivity.
If a strong interfering signal is received, rotate
counterclockwise to reduce the RF gain.
L
“RFG” is displayed when the RF gain is reduced.
L
If a strong signal is received and “OVF” (Overflow) is
displayed, reduce the RF gain until “OVF” disappears.
Squelch (SQL) level
There are 2 types of SQL levels, depending on the
operating mode.
• Noise squelch
Rotate until the noise just disappears and
the RX indicator goes OFF.
L
Activates when the squelch level is set to between 30%
and 50% in the FM or DV mode.
• S-meter squelch
The S-meter squelch disables the audio output from
the speaker or headphones when the received signal
is weaker than the specified S-meter squelch level.
Rotate clockwise to increase the S-meter
threshold level.
L
Activates when the squelch level is set to between 50%
and 100% in any mode.
S-meter squelch level
Adjusting the microphone gain
1. Set the operating band and mode to SSB, AM,
FM, DV, or ATV. (p. 3-2)
2. Push to open the Multi-function menu.
3. Hold down [PTT].
4. Touch [MIC GAIN], and rotate to adjust
the microphone gain.
L
Information
• Hold the microphone 5 to 10 cm (2 to 4 inches) from
your mouth, then hold down [PTT] on the microphone
and speak at your normal voice level.
• In the SSB mode, touch the TX meter to select the
ALC meter, and rotate to adjust the microphone gain
until the meter reading swings between 30 to 50% of
the ALC scale.
• In the AM, FM, DV, or ATV mode, check the audio
clarity with another station, or use the Monitor
function (p. 4-2).
5. Release [PTT].
• Returns to receive.