Icom IC-7600 Instruction Manual page 11

y MICROPHONE CONNECTOR [MIC]
Accepts the supplied or an optional microphone.
• See page 171 for appropriate microphones.
• See page 24 for microphone connector
information.
u MIC GAIN CONTROL [MIC GAIN] (p. 40)
Adjusts the microphone gain.
• The transmit audio tone in the SSB, AM and FM modes
can be adjusted independently in the level set mode.
(p. 128)
How to set the microphone gain.
✓
Set the [MIC GAIN] control so that the ALC meter
swings within the ALC range during normal voice
level transmission, in the SSB or AM modes. (The
ALC meter must be selected.)
Decreases
Push
Recommended level for
an Icom microphone
i AF CONTROL [AF] (inner control; p. 38)
Varies the audio output level of the speaker or
headphones.
Decreases
o RF POWER CONTROL [RF POWER] (p. 40)
Continuously varies the RF output power from a
minimum of to a maximum of
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. 37)
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.
• The 12 to 1 o'clock position is recommended for the
most effective use 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
the set mode as follows. (p. 136)
SET MODE SETTING
MODE
AUTO
SSB, CW
RF GAIN
RTTY/PSK
AM, FM SQL
• When setting as an RF gain/squelch control
Noise squelch (FM mode)
Squelch is
open.
RF gain
adjustable
range
• When functioning as an RF gain control
(Squelch is fixed open; SSB, CW, RTTY and PSK only)
Adjustable
range
Minimum RF gain
• When functioning as a 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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