Specifications

DMU-2000 DATA MANAGEMENT UNITPage 24
USING THE LBWS
(
LIMITED BAND WIDTH SWEEP
)
FUNCTION
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
SPECTRUM SCOPE
1. By pressing the
[
KEY6
(
CTR/FIX
)]
key repeatedly, the
CTR mode and the FIX mode will be toggled alter-
nately.
2. Press the
[
KEY2
(
SPAN
)]
key repeatedly, to choose
the bandwidth span to be shown on the Spectrum
Scope. The bandwidth span choices are:
25 kHz

50 kHz

100 kHz

250 kHz

500 kHz

1000 kHz

2500 kHz

25 kHz
......
3. Press the
[
KEY3
(
ATT
)]
key repeatedly, to choose the
desired attenuation value. The attenuation will change
as follows:
0 dB

10 dB

20 dB

0 dB
......
4. By pressing the
[
KEY7
(
LBWS
)]
key repeatedly, the
LBWS (Limited Band Width Sweep) segment width
will change as follows.
NORMAL

LBWS-1
(
50%
)

LBWS-2
(
30%
)

LBWS-3
(
10%
)

NORMAL
......
Advice: The LBWS feature can not be used in the FIX
mode. The LBWS is only available in the CTR mode.


[
KEY6
(
CTR/FIX
)]
Key

[
KEY7
(
LBWS
)]
Key
MANUAL
REFERENCE
[
KEY1
(
xxx
)]
[
KEY2
(
xxx
)]
[
KEY3
(
xxx
)]
[
KEY4
(
xxx
)]
[
KEY5
(
xxx
)]
[
KEY6
(
xxx
)]
[
KEY7
(
xxx
)]
[
KEY8
(
xxx
)]
FT-950
FTDX5000
[
1.8
(
1
)]
[
3.5
(
2
)]
[
7
(
3
)]
[
10
(
4
)]
[
14
(
5
)]
[
18
(
6
)]
[
21
(
7
)]
[
24.5
(
8
)]
FT-2000
FT-2000D
[
F1
(
CH-1
)]
[
F2
(
CH-2
)]
[
F3
(
CH-3
)]
[
F4
(
CH-4
)]
[
F5
(
MEM
)]
[
F6
(
DEC
)]
[
F7
(
P.BACK
)]
[
DISPLAY
]