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LBWS (Limited Band Width Sweep) is a function that sweeps a limited
the span (bandwidth). As the sweep segment becomes narrower, the speed becomes faster, and the accuracy and resolution are
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.
1. Press and hold the FT
DX
engage the Scope Menu mode.
The SUB DISPLAY- window will show the Group name
(SCOPE), while the SUB DISPLAY- window will show
the Menu item. The SUB DISPLAY-
the setting of the currently-selected Menu item.
2. Rotate the ( VFO-A )[ SELECT ] knob to select the Menu
item "MODE", then rotate the ( VFO-B )[ SELECT ] knob
to select the desired sweep bandwidth.
LBWS-1: The sweep speed becomes about 2 times faster
(The bandwidth decreases to 50 %).
LBWS-2: The sweep speed becomes about 3 times faster
(The bandwidth decreases to 30 %).
LBWS-3: The sweep speed becomes about 10 times faster
(The bandwidth decreases to 10 %).
Note: The "CENTER" and "FIX" selections are not select
items of the LBWS function. Do not select these selec-
tions.
4. Rotate the ( VFO-A )[ SELECT ] knob to select the Menu
item "SPAN", then rotate the ( VFO-B )[ SELECT ] knob
to select the desired frequency span to monitor.
Available selections are: 25 kHz, 50 kHz, 100 kHz, 250
kHz, 500 kHz, 1000 kHz, and 2500 kHz.
5. Rotate the ( VFO-A )[ SELECT ] knob to select the Menu item
"ATT", then rotate the ( VFO-B )[ SELECT ] knob to select
the display attenuation value according to current propaga-
tion conditions, your operating frequency, and antenna, etc.
Available selections are: 0 dB, 10 dB, and 20 dB.
6. Press the [ C.S ] key briefly to save the new setting and
exit to normal operation.
N
:
The Trace Mode cannot be selected with the LBWS function.
1. Press and hold the FT
onds to to engage the Scope Menu mode.
The SUB DISPLAY- window will show the Group
name (SCOPE), while the SUB DISPLAY- window
will show the Menu item. The SUB DISPLAY-
dow shows the setting of the currently-selected Menu
item.
2. Rotate the ( VFO-A )[ SELECT ] knob to select the
Menu item "LBWS", then rotate the ( VFO-
B )[ SELECT ] knob to select the desired sweep area.
Available selections are shown at the right.
3. Press the [ C.S ] key briefly to save the new setting and
exit to normal operation.
LBWS L
5000 [ C.S ] key for 2 seconds to
window shows
S
5000 [ C.S ] key for 2 sec-
DX
B
W
of the Spectrum Scope span without
S
A
The Spectrum scan sweeps the band segment
LBWSx L:
on the lower side of the operating frequency.
win-
LBWSx M: The Spectrum scan sweeps the band segment
centered on the operating frequency.
The Spectrum scan sweeps the band segment
LBWSx H:
on the upper side of the operating frequency.
x: 1, 2, or 3; indicates the sweep segment that is desig-
nated in the Menu item "MODE", described previously.
The above examples are "2" (LBWS-2).
- 4 -
S
F
[ C.S ] Switch
( VFO-A )[ SELECT ] Knob
Current VFO-A Frequency
Current Sweep Bandwidth
( VFO-B )[ SELECT ] Knob
OPERATING Mode
LBWS
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