Yaesu SM-5000 - COMPUTER Interface Manual page 4

U
SING THE
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 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- I window will show the Group name
SCOPE SCOPE SCOPE), while the SUB DISPLAY- II window will show
SCOPE
(SCOPE
the Menu item. The SUB DISPLAY- III window shows
the setting of the currently-selected Menu item.
2. Rotate the ( VFO-A )[ SELECT ] knob to select the Menu
MODE MODE
MODE MODE", then rotate the ( VFO-B )[ SELECT ] knob
item "MODE
to select the desired sweep bandwidth.
LBWS-1 LBWS-1
LBWS-1 LBWS-1: The sweep speed becomes about 2 times faster LBWS-1
(The bandwidth decreases to 50 %).
LBWS-2: The sweep speed becomes about 3 times faster LBWS-2 LBWS-2 LBWS-2 LBWS-2
(The bandwidth decreases to 30 %).
LBWS-3 LBWS-3 LBWS-3 LBWS-3 LBWS-3: The sweep speed becomes about 10 times faster
(The bandwidth decreases to 10 %).
CENTER" and "FIX CENTER CENTER CENTER
Note: The "CENTER
items of the LBWS function. Do not select these selec-
tions.
4. Rotate the ( VFO-A )[ SELECT ] knob to select the Menu
SPAN", then rotate the ( VFO-B )[ SELECT ] knob SPAN SPAN
SPAN
item "SPAN
to select the desired frequency span to monitor.
Available selections are: 25 kHz
kHz, 500 kHz kHz kHz kHz kHz 500 kHz 500 kHz 500 kHz, 1000 kHz 500 kHz 1000 kHz 1000 kHz 1000 kHz, and 2500 kHz 1000 kHz
5. Rotate the ( VFO-A )[ SELECT ] knob to select the Menu item
ATT ATT ATT ATT", then rotate the ( VFO-B )[ SELECT ] knob to select
"ATT
the display attenuation value according to current propaga-
tion conditions, your operating frequency, and antenna, etc.
Available selections are: 0 dB
6. Press the [ C.S ] key briefly to save the new setting and
exit to normal operation.
N :
OTE
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- I window will show the Group
SCOPE SCOPE SCOPE), while the SUB DISPLAY- II window
SCOPE
name (SCOPE
will show the Menu item. The SUB DISPLAY- III win-
dow shows the setting of the currently-selected Menu
item.
2. Rotate the ( VFO-A )[ SELECT ] knob to select the
LBWS LBWS LBWS LBWS", then rotate the ( VFO-
Menu item "LBWS
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
IMITED
5000 [ C.S ] key for 2 seconds to
FIX FIX FIX FIX" selections are not select
25 kHz, 50 kHz 25 kHz 25 kHz 50 kHz 50 kHz, 100 kHz 50 kHz 100 kHz 100 kHz 100 kHz, 250
25 kHz 50 kHz 100 kHz
2500 kHz 2500 kHz. 2500 kHz 2500 kHz
0 dB, 10 dB 0 dB 0 dB 0 dB 10 dB 10 dB 10 dB 10 dB, and 20 dB 20 dB. 20 dB 20 dB 20 dB
S
ELECTING THE
5000 [ C.S ] key for 2 sec-
DX
B W
AND IDTH
250 250 250
250
S A
WEEP REA
LBWSx L LBWSx L
LBWSx L LBWSx L: LBWSx L
The Spectrum scan sweeps the band segment
on the lower side of the operating frequency.
LBWSx M LBWSx M LBWSx M: The Spectrum scan sweeps the band segment LBWSx M LBWSx M
centered on the operating frequency.
LBWSx H LBWSx H: LBWSx H
LBWSx H LBWSx H
The Spectrum scan sweeps the band segment
on the upper side of the operating frequency.
x x x x x : 1 1 1 1 1 , 2 2 2 2 2 , or 3 3 3 3 3 ; indicates the sweep segment that is desig-
nated in the Menu item "MODE
The above examples are "2 2 2 2 2 " (LBWS-2
- 4 -
) F
S
WEEP UNCTION
[ C.S ] Switch ( VFO-A )[ SELECT ] Knob
Current VFO-A Frequency
Current Sweep Bandwidth
MODE", described previously. MODE MODE
MODE
LBWS-2). LBWS-2 LBWS-2 LBWS-2
( VFO-B )[ SELECT ] Knob
OPERATING Mode
LBWS