DMU-2000 DATA MANAGEMENT UNITPage 26
ABOUT THE AUDIO SCOPE AND OSCILLOSCOPE
AUDIO SCOPE AND OSCILLOSCOPE
[
F2
(
MODE
)]
Key
The SCAN MODE for the left-side Audio Scope can
be changed. By pressing this key, the mode changes:
NORMAL
WF-1
WF-2
NORMAL
......
“WF-1” and “WF-2” are “Waterfall” displays. The
sweep time (speed) of “WF-2” is faster than that of
“WF-1.”
[
F3
(
SOURCE
)]
Key
Pressing this key lets you select the source for the
audio to be viewed by the Audio Scope. The selec-
tions are:
VFO-A
VFO-B
EXT
VFO-A
......
When “EXT” is selected, you can observe the audio
wave form of a signal provided by equipment con-
nected to the AUDIO IN jack on the rear panel of the
DMU-2000.
[
F4
(
ATT
)]
Key
(
Attenuator
)
This key lets you adjust the attenuator for the Audio
scope. Set the appropriate value based on the received
signal.
0 dB
10 dB
20 dB
0 dB
......
[
F6
(
LEVEL
)]
Key
This key lets you adjust the sensitivity of the Oscillo-
scope display at the right side of the screen. Adjust
the level while viewing the screen, to optimize the
setting according to the signal and noise conditions
present. Available values are:
0.3 V
0.1 V
1.0 V
0.3 V
......
[
F7
(
SWEEP
)]
Key
This key lets you adjust the sweep time for the Oscil-
loscope. Adjust this setting while viewing the screen.
Available sweep times are:
10 ms
30 ms
100 ms
300 ms
1 s
10 ms
......
[
DISPLAY
]
Key
Press this key momentarily to switch the Function
key’s function between the “Page Select Key” and the
“Function Key.”
Press and hold in this key to disable the Function keys
(except this key).
It is possible to show both the Audio Scope and the Os-
cilloscope displays simultaneously.
With the Audio Scope, the horizontal line represents fre-
quency, and you can use this function check the frequency
response within the RX or TX bandwidth. In the Oscillo-
scope mode, the horizontal line represents time, and you
can check the RX signal waveform within the RX band-
width, as well as the TX wave form.
If the “Audio Scope / Oscilloscope” screen does not ini-
tially appear, press the
[
DISPLAY
]
key to switch the Func-
tion key’s function to “Page Select Key,” then press the
[
F3
(
AF SCOPE
)]
key momentarily to display the “Au-
dio Scope / Oscilloscope” screen. Next, press the
[
DIS-
PLAY
]
key again to switch the Function key’s function to
the “Function Key.”
E
XPLANATION
OF
THE
F
UNCTION
K
EYS
ON
THE
A
UDIO
S
COPE
AND
O
SCILLOSCOPE
S
CREEN
Here are the uses for the function keys when the Audio scope and Oscilloscope are displayed on the screen.
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