Main Band Rf Gain Control; Main Band Af Control; Notch Switch; Manual Notch Filter Control - Icom IC-9100 Instruction Manual

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SQUELCH CONTROL [RF/SQL]
Rotate to adjust the RF gain and squelch threshold
level for the MAIN Band.
The squelch removes noise output to the speaker
when no signal is received. (closed condition)
also works in other modes.
most effective use of the [RF/SQL] control.
[RF/SQL] operates as only an RF gain control in SSB,
Squelch is fixed open), or a squelch
control in AM, FM and DV (RF gain is fixed at maxi-
mum sensitivity), when "Auto" is selected as the "RF/
SQL Control" item option in the Set mode. (p. 162)
Noise squelch (FM/DV modes)
Squelch is
open.
RF gain
adjustable
range
Adjustable
range
Minimum RF gain
While rotating the RF gain control, a faint noise may
be heard. This comes from the DSP unit and does
not indicate an equipment malfunction.
(RF gain is fixed at maximum.)
Noise squelch (FM/DV modes)
Noise squelch
threshold
(FM mode)
Squelch is
open.
Shallow
for the
Recommended level
Maximum
RF gain
S-meter
squelch
Maximum
RF gain
S-meter squelch
threshold
S-meter
squelch
Deep
PANEL DESCRIPTION
!0
Rotate to adjust audio output level to the speaker or
headphones on the MAIN Band.
Decreases
!1 NOTCH SWITCH [NOTCH] (p. 77)
In the SSB and AM modes, push to toggle the
notch function between auto, manual and OFF.
turned OFF in the "[NOTCH] SW" item of the Set
mode. (p. 36)
In FM mode, push to turn the Auto Notch
the
function ON or OFF.
In mode, push to turn the Man-
the
ual Notch function ON or OFF.
ON.
Hold down for 1 second to switch the manual
filter characteristics from wide, mid and narrow,
when the Manual Notch function is selected.
What is the notch filter?
The notch filter is a narrow filter that eliminates un-
wanted CW or AM carrier tones, while preserving
the desired voice signal. The DSP circuit automati-
cally adjusts the notch frequency to effectively elim-
inate unwanted tones.
!2 MANUAL NOTCH FILTER CONTROL [NOTCH]
Rotate to adjust the notch frequency to reject an
interfering signal while the manual function is ON.
CW : CW pitch freq. –2540 Hz to
CW pitch freq. +2540 Hz
AM : –5060 Hz to +5100 Hz
Lower frequency
The optional UX-9100 is required for 1200 MHz frequency
band operation.
The optional UT-121 is required for DV mode operation.
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Increases
Higher frequency
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