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PANEL DESCRIPTION
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-!)."!.$2&'!).#/.42/,
SQUELCH CONTROL [RF/SQL]
OUTERCONTROLP
Rotate to adjust the RF gain and squelch threshold
level for the MAIN Band.
The squelch removes noise output to the speaker
when no signal is received. (closed condition)
s4HESQUELCHISPARTICULARLYEFFECTIVEFOR!-AND&-BUT
also works in other modes.
s4HETOOCLOCKPOSITIONISRECOMMENDED
for the
most effective use of the
[RF/SQL]
control.
s
[RF/SQL]
operates as only an RF gain control in SSB,
#7AND2449
Squelch is fixed open), or a squelch
control in AM, FM and DV (RF gain is fixed at maxi-
mum sensitivity), when “Auto” is selected as the “RF/
SQL Control” item option in the Set mode. (p. 162)
s7HENUSEDASAN2&GAINSQUELCHCONTROL
Maximum
RF gain
S-meter
squelch
Noise squelch (FM/DV modes)
Squelch is
open.
RF gain
adjustable
range
Recommended level
s7HENUSEDASAN2&GAINCONTROL
3QUELCHISlXEDOPEN33"#7AND2449ONLY
Minimum RF gain
Adjustable
range
Maximum
RF gain
While rotating the RF gain control, a faint noise may
be heard. This comes from the DSP unit and does
not indicate an equipment malfunction.
s7HENUSEDASASQUELCHCONTROL
(RF gain is fixed at maximum.)
Squelch is
open.
S-meter
squelch
S-meter squelch
threshold
Noise squelch
threshold
(FM mode)
Shallow
Deep
Noise squelch (FM/DV modes)
!0
-!)."!.$!&#/.42/,;!&=
INNERCONTROLP
Rotate to adjust audio output level to the speaker or
headphones on the MAIN Band.
Increases
Decreases
!1
NOTCH SWITCH [NOTCH]
(p. 77)
-ODE!UTONOTCH 33"!-&-
-ANUALNOTCH33"#72449!-
±
In the SSB and AM modes, push to toggle the
notch function between auto, manual and OFF.
s%ITHERTHE!UTOOR-ANUALNOTCHFUNCTIONCANBE
turned OFF in the “[NOTCH] SW” item of the Set
mode. (p. 36)
±
In
the
FM mode, push to turn the Auto Notch
function ON or OFF.
±
In
the
#7OR2449
mode, push to turn the Man-
ual Notch function ON or OFF.
sh-.&vAPPEARSWHENTHE-ANUAL.OTCHFUNCTIONIS
ON.
sh!.&vAPPEARSWHENTHE!UTO.OTCHFUNCTIONIS/.
s.OINDICATORAPPEARSWHENTHENOTCHlLTERIS/&&
±
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]
OUTERCONTROLP
Rotate to adjust the notch frequency to reject an
interfering signal while the manual function is ON.
s.OTCHlLTERCENTERFREQUENCY
33"2449
n(ZTO(Z
CW
: CW pitch freq. –2540 Hz to
CW pitch freq. +2540 Hz
AM
: –5060 Hz to +5100 Hz
Higher frequency
Lower frequency
The optional UX-9100 is required for 1200 MHz frequency
band operation.
The optional UT-121 is required for DV mode operation.