Squelch And Receive Sensitivity; Adjusting Rf Gain; Adjusting Squelch; Basic Transmit Operation - Icom IC-9100 Instruction Manual

Adjusts the RF gain and squelch threshold level. The
squelch removes noise output to the speaker when no
signal is received (closed squelch).
also be used in other modes.
effective use of the [RF/SQL] control.
is fixed open) or only a squelch control (RF gain is fixed at
maximum sensitivity) depending on the "RF/SQL Control"
option in the Set mode. (p. 162)
OPERATING
SET MODE
MODE
SETTING
FM/DV
RF+SQL
(default)
AM
ALL
SQL
AUTO
AM/FM/DV
(Receive sensitivity)
Normally, [RF/SQL] is set to the 12 o'clock position.
Rotate [RF/SQL] to the 11 o'clock position for maxi-
mum sensitivity.
duces sensitivity.
While rotating the RF gain control, noise may be
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.
(Removing non-signal noise)
Rotate [RF/SQL] clockwise when no signal is received,
until the noise just disappears.
S-meter squelch— this allows you to set a minimum signal
level needed to open the squelch.
the most
Squelch
[RF/SQL]
OPERATION
Operates as an RF
gain control, and
a noise squelch or
Smeter squelch.
Operates as an RF
gain control, and an
Smeter squelch.
Operates as only a
squelch control.
maximum sensitivity.
Operates as only an
RF gain control.
Operates as only a
squelch control.
maximum sensitivity.
-
[RF/SQL](MAIN Band)
[RF/SQL](SUB Band)
Noise squelch (FM/DV modes)
Squelch is
open.
RF gain
adjustable
range
Adjustable
range
Minimum RF gain
(RF gain is fixed at maximum.)
Noise squelch (FM/DV modes)
Noise squelch
threshold
(FM mode)
Squelch is
open.
Shallow
BASIC OPERATION
Recommended level
Maximum
RF gain
S-meter
squelch
Maximum
RF gain
S-meter squelch
threshold
S-meter
squelch
Deep
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