Icom IC-7600 Instruction Manual page 9

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
occasionally moves up-scale during normal voice
transmission in SSB, AM or FM mode.
Decreases
Push
Recommended level for
an Icom microphone
i AF CONTROL [AF] (inner control; p. 34)
Varies the audio output level of the speaker or
headphones.
Decreases
o RF POWER CONTROL [RF POWER] (p. 36)
Continuously varies the RF output power from
minimum to maximum
(2 W*)
*AM mode: 1 W to 30 W
Decreases
Push
min. 2 W
(1 W for AM)
Increases
MIC GAIN
Increases
.
(100 W*)
Increases
max. 100 W
(30 W for AM)
PANEL DESCRIPTION
!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.
• The 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)
SET MODE SETTING
MODE
AUTO
SSB, CW
RF GAIN
RTTY/PSK
AM, FM SQL
• When setting as RF gain/squelch control
Noise squelch (FM mode)
Squelch is
open.
RF gain
adjustable
range
• When functioning as RF gain control
(Squelch is fixed open; SSB, CW, RTTY and PSK only)
Adjustable
range
Minimum RF gain
• When functioning as squelch control
(RF gain is fixed at maximum.)
Noise squelch (FM mode)
Noise squelch
threshold
(FM mode)
Squelch is
open.
Shallow
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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SQL RF GAIN + SQL
SQL RF GAIN + SQL
SQL RF GAIN + SQL
Recommended level
Maximum
RF gain
S-meter
squelch
Maximum
RF gain
S-meter squelch
threshold
S-meter
squelch
Deep
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