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y MICROPHONE CONNECTOR [MIC]
Accepts the supplied or optional microphone.
See p. 161 for appropriate microphones.
See p. 23 for microphone connector information.
u MIC GAIN CONTROL [MIC GAIN] (p. 36)
Adjusts microphone input gain.
The transmit audio tone in SSB, AM and FM modes
can be adjusted independently in level set mode.
(p. 121)
How to set the microphone gain.
Set the [MIC GAIN] control so that the ALC meter
o
ccasionally moves up-scale during normal voice
transmission in SSB, AM or FM mode.
MIC GAIN
Recommended level for
an Icom microphone
Increases
Decreases
Push
i AF CONTROL [AF] (inner control; p. 34)
Varies the audio output level of the speaker or
headphones.
o RF POWER CONTROL [RF POWER] (p. 36)
Continuously varies the RF output power from
minimum (2 W*) to maximum (100 W*).
*AM mode: 1 W to 30 W
Increases
max. 100 W
(30 W for AM)
Decreases
min. 2 W
(1 W for AM)
Push
!0 RF GAIN CONTROL/SQUELCH CONTROL
[RF/SQL] (outer control; p. 33)
Adjusts the RF gain and squelch threshold level.
The squelch removes noise output from the speaker
(closed condition) when no signal is received.
The squelch is particularly effective for FM. It is also
available for other modes.
12 to 1 o’clock position is recommended for any setting
of the [RF/SQL] control.
T
he control can be set as Auto (RF gain control in
SSB, CW, RTTY and PSK; squelch control in AM and
FM) or squelch control (RF gain is fixed at maximum)
in set mode as follows. (p. 128)
MODE
SET MODE SETTING
AUTO SQL RF GAIN + SQL
SSB, CW
RTTY/PSK
RF GAIN SQL RF GAIN + SQL
AM, FM SQL SQL RF GAIN + SQL
When setting as RF gain/squelch control
Maximum
RF gain
S-meter
squelch
Noise squelch (FM mode)
Squelch is
open.
RF gain
adjustable
range
Recommended level
When functioning as RF gain control
(Squelch is fixed open; SSB, CW, RTTY and PSK only)
Minimum RF gain
Adjustable
range
Maximum
RF gain
When functioning as squelch control
(RF gain is fixed at maximum.)
Squelch is
open.
S-meter
squelch
S-meter squelch
threshold
Noise squelch
threshold
(FM mode)
Shallow Deep
Noise squelch (FM mode)
While rotating the RF gain control, noise may be
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.
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