Une Ilter - Yaesu FT DX 3000 Operating Manual

µ-t F
une
he uning it pro ides ultra sharp
si le y the narro and design. hree
MTU-80/40 co ers the . and
hen any or all of the three optional units are connected they ill e automatically adjusted to center on your operat-
ing fre uency.
he narro and idth is especially useful on the lo
propagation ear ertical Incidence ignals
pecially helpful in pre enting I
µ-Tune Operation
ress and hold in the [ MHz/µT button for one sec-
.
ond to acti ate the une filter. he
[ MHz/µT button will glow red. The [ CLAR/VFO-
B no or s as the
A :
dvice
he une circuit ill automatically align itself
to the operating fre uency.
emem er that
and lo er ands.
otate the [ CLAR/VFO-B knob to peak the re-
.
sponse ac ground noise or reduce interference.
A :
dvice
You may observe the relative peak point of the
une filter in the uning
the fre uency display
[ CLAR/VFO-B knob.
he amount of change in the center fre uency
of the une filter
no can e configured using
VFO-B
item 044 µTUNE DIAL STEP .
If the une filter has een manually adjusted
a ay from the center fre uency you may press
the [ CLEAR button to re-center the filter re-
sponse on the current operating fre uency.
ress and hold in the [ MHz/µT button for one sec-
.
ond to disengage the
A :
dvice
lternate presses of the [ MHz/µT button will switch
the une filter et een on or off.
A :
dvice
he une ilter selection
dependently on each
.
ou may change the indication of the uning ffset
Indicator to display the
hile the une filter is acti ated. his is
item 010 BAR DISPLAY SELECT . ee the o on
the next page for details of the setting.
FT 3000 O
DX peraTing
i
nterference
( r
ilter equireS the optionAl
selecti ity for the front end of the transcei er. ery high
uning its are a aila le. he MTU-160 co ers the .
ands. he MTU-30/20 co ers
ithin a narro
and loc ing.
inside the
I no .
une only operates on the
ffset Indicator on
hile tuning the
hen rotating the [ CLAR/
enu
une filter
ill e memori ed in-
stac of the and
une filter continuously
enu
M
anual
rF µ t
. and
ands hen many strong signals are eing recei ed ia
and idth. he added protection for the
t
uning
he une filters are the most ad anced selecti e
preselector filters e er incorporated into an ma-
teur adio transcei er. he
y une can e of tremendous alue in ensur-
ing uiet intermod free reception e en in the most
cro ded ands on a contest
filters pro ide
do en at
system gain on ands
an issue. ou ill notice that the
hen une is engaged is slightly less than
it is out of the circuit this is normal. If your antenna
system gain is so low that you cannot hear the band
noise hen une is engaged highly unli ely just
s itch it out to eliminate the slight insertion loss.
r
ejection
)
K
uning it
is made pos-
and. he
ands.
stage is es-
[ MHz/µT ] Button
[ CLAR/VFO-B ] Button
o i
FFSet ndicAtor
selecti ity pro ided
ee end. he
selecti ity on the order of a fe
d at the e pense of a fe
here noise figure is seldom
meter de ection
Page 47
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une
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