User's Manual

2
1
PANEL DESCRIPTION
1
o-!)."!.$2&'!).#/.42/,
SQUELCH CONTROL [RF/SQL]
OUTERCONTROLP
Rotate to adjust the RF gain and squelch threshold
level for the MAIN Band.
The squelch removes noise output to the speaker
when no signal is received. (closed condition)
s4HESQUELCHISPARTICULARLYEFFECTIVEFOR!-AND&-BUT
also works in other modes.
s4HETOOCLOCKPOSITIONISRECOMMENDEDfor the
most effective use of the [RF/SQL] control.
 s[RF/SQL] operates as only an RF gain control in SSB,
#7AND2449Squelch is fixed open), or a squelch
control in AM, FM and DV (RF gain is fixed at maxi-
mum sensitivity), when “Auto” is selected as the
“RF/
SQL Control” item option in
the Set mode. (p. 162)
s7HENUSEDASAN2&GAINSQUELCHCONTROL
Maximum
RF gain
S-meter
squelch
Noise squelch (FM/DV modes)
Squelch is
open.
RF gain
adjustable
range
Recommended level
s7HENUSEDASAN2&GAINCONTROL
3QUELCHISlXEDOPEN33"#7AND2449ONLY
Minimum RF gain
Adjustable
range
Maximum
RF gain
While rotating the RF gain control, a faint noise may
be heard. This comes from the DSP unit and does
not indicate an equipment malfunction.
s7HENUSEDASASQUELCHCONTROL
(RF gain is fixed at maximum.)
Squelch is
open.
S-meter
squelch
S-meter squelch
threshold
Noise squelch
threshold
(FM mode)
Shallow Deep
Noise squelch (FM/DV modes)
!0-!)."!.$!&#/.42/,;!&=
INNERCONTROLP
Rotate to adjust audio output level to the speaker or
headphones on the MAIN Band.
n rea
e
De rea e
!1 NOTCH SWITCH [NOTCH] (p. 77)
 -ODE!UTONOTCH 33"!-&-
    -ANUALNOTCH33"#72449!-
± In the SSB and AM modes, push to toggle the
notch function between auto, manual and OFF.
   s%ITHERTHE!UTOOR-ANUALNOTCHFUNCTIONCANBE
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 #7OR2449 mode, push to turn the Man-
ual Notch function ON or OFF.
sh-.&vAPPEARSWHENTHE-ANUAL.OTCHFUNCTIONIS
ON.
  sh!.&vAPPEARSWHENTHE!UTO.OTCHFUNCTIONIS/.
s.OINDICATORAPPEARSWHENTHENOTCHlLTERIS/&&
± 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]
OUTERCONTROLP
Rotate to adjust the notch frequency to reject an
interfering signal while the manual function is ON.
 s.OTCHlLTERCENTERFREQUENCY
 33"2449 n(ZTO(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.