Yaesu FT DX 9000 TFT, Manual

Page: 20 / 52

FT
DX
9000 TFT O
PERATION
M
ANUAL
U
SING THE
LBWS
(
L
IMITED
B
AND
W
IDTH
S
WEEP
)
F
UNCTION
LBWS (Limited Band Width Sweep) is a function that sweeps a limited segment of the Spectrum Scope span
without changing the span (bandwidth). As the sweep segment becomes narrower, the speed becomes faster,
and the accuracy and resolution become enhanced.
The bandwidth can be set to 50 %, 30 %, or 10 % of the full span. The sweep speed will increase as follows:
50 %: about 2 times faster, 30 %: about 3 times faster, 10 %: about 10 times faster
S
PECTRUM
S
COPE
1. By pressing the [ F7
](
CTR/FIX
) key repeatedly, the
CTR mode and the FIX mode will be toggled alter-
nately.
2. By pressing the [ F2
](
SPAN
) key, you can set the
bandwidth of the span viewed using the Spectrum
Scope.
By pressing the [
F2
](
SPAN
) key, the span will
change as follows.
25 kHz
Æ
50 kHz
Æ
100 kHz
Æ
250 kHz
Æ
500 kHz
Æ
1000 kHz
Æ
2500 kHz
Æ
25 kHz
......
3. Press the [ F3
](
ATT
) key to set the desired attenu-
ation value.
By pressing the [
F3
](
ATT
) key, the attenuation will
change as follows.
0 dB
Æ
10 dB
Æ
20 dB
Æ
0 dB ......
4. By pressing the [ F6
](
LBWS
) key, the LBWS seg-
ment width will change as follows.
NORMAL
Æ
LBWS-1(50%)
Æ
LBWS-2(30%)
Æ
LBWS-3(10%)
Æ
NORMAL ......
5. Press the [ F4
](
A/B
) key to select the Main (VFO-
A) or Sub (VFO-B) VFO.
Advice :Please note that the LBWS feature can not
be used in the FIX mode. Please use LBWS only in
the CTR mode.
While using LBWS, it is not possible to switch to the
dual display mode.
Note :The QMB marker will not appear on the screen
while LBWS is engaged.
Ø
Ï
“LBWS” Select
Ï
“LBWS” Select
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