Operation Manual

Page 57FT
DX
3000 OperaTing Manual
digitAl NotcH FilteR
(
dNF
)
opeRAtioN
TheDigitalNOTCHFilter(DNF)isaneffectivebeat-cancelinglterthatcannulloutanumberofinterferingbeatnotes
insidethereceiverpassband.BecausethisisanAuto-Notchfeature,thereisnoadjustmentknobassociatedwiththisl-
ter.
Advice:
Ifaverystronginterferingcarrierisencountered,werecommendyourstusetheIFNOTCHlter,asitisthemostef-
fective notching tool in the receiver section.
1. Press the
[
p
/
q
/

/

]
buttontoselectthe“
DNF
”.
2. Press the
[
SELECT
]
button tochoose“
ON
”.The
“
DNF
”willappearinthedisplay.
TodisabletheDigitalNOTCHFilter,justrepeatthe
aboveprocedure,pressingthe
[
SELECT
]
buttonto
choose “
OFF
”instep2above.The“
DNF
”willturnoff,
conrmingthattheDigitalNOTCHFilterisnotactive.
digitAl NoiSe ReductioN
(
dNR
)
opeRAtioN
TheDigitalNoiseReduction(DNR)systemisdesignedtoreducethelevelofrandomnoisefoundontheHFand50
MHzbands,anditisespeciallyeffectiveduringSSBoperation.BysettingtheMenuitem“
110 DNR LEVEL
”,anyof15
differentnoise-reductionalgorithmscanbeselected;eachofthesealgorithmswascreatedfordealingwithadifferent
noiseprole.YouwillwanttoexperimentwiththeDNRsystemtondthebestsettingcorrespondingtothenoisecur-
rentlybeingexperienced.
1. Press the
[
p
/
q
/

/

]
buttontoselectthe“
DNR
”.
2. Press the
[
SELECT
]
button tochoose“
ON
”.The
“
DNR
”willappearinthedisplay.
TodisabletheDNRsystem,justrepeattheaboveproce-
dure, pressing the
[
SELECT
]
buttontochoose“
OFF
”in
step2above.The“
DNR
”willturnoff,conrmingthat
theDNRsystemisnotactive.
[
SELECT
]
button
[
SELECT
]
button
interFerence rejectiOn
DNF Indicator
DNR Indicator
【
p
/
q
/

/

】
button
【
p
/
q
/

/

】
button