Using If Shift And Width Together - Yaesu FT DX 3000 Operating Manual

i
nterference
width ( iF dSp b
he I I tuning system allo s you to ary the idth of the
oreo er the and idth may actually e expanded from its default setting should you ish to enhance incoming sig-
nal fidelity hen interference on the and is lo .
otate the [ WIDTH knob to the left or right to re-
.
duce the interference.
A :
dvice
he fre uency display
the IF passband for 3 seconds whenever the [ WIDTH
knob is turned.
A :
dvice
he I and idth ill e memori ed independently on
each stac of
eferring to igure B you can see the default
bandwidth on the SSB mode.
By rotating the [ WIDTH
and idth ill narro
rotation of the [ WIDTH
depicted in igure C
width.
A
IF BANDWIDTH IF BANDWIDTH
SHIFT SHIFT
he default and idths and total and idth ad-
justment range ill ary according to the operat-
ing mode
ode .
ode .
odes
Page 54
r
ejection
) t
Andwidth
ill sho the and idth of
and .
no to the left the
see igure A hile
no to the right as
ill increase the and-
B C
IF BANDWIDTH
SHIFT
. default . .
default .
. default
( SSb/cw/rtty/pKt M
uning
I pass and to reduce or eliminate interference.
[ WIDTH ] Knob
width i

Using IF SHIFT and WIDTH Together

he I I
together form a ery effecti e interference fight-
ing filtering system.
or e ample in igure A
interference has appeared both on the high
and lo sides of the desired signal.
[ WIDTH
no
can e eliminated
[ SHIFT
no to re position the pass and
the interference on the opposite side can e
C
remo ed ithout re introducing the interference
pre iously eliminated in igure B .
A
Desired Signal
QRM
QRM
IF BANDWIDTH
A :
dvice
or est interference reduction the
SHIFT features are the primary tools you should
use after narro ing the and idth
and or adjusting the center of the pass and
I . he
additional signal-enhancement benefits on
the net residual and idth.
ilter descri ed later may also e
used in conjunction ith these filter systems to
significant ad antage.
FT
DX
odeS
ndicAtor
and aria le I I features
you can see ho
otate the
the interference from one side
igure B . e t rotate the
B C
Desired Signal Desired Signal
QRM
QRM QRM
IF BANDWIDTH IF BANDWIDTH
I
I
ontour control may then yield
en more the I
3000 O M
peraTing
)
igure
QRM
and
anual