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DMU-2000 DATA MANAGEMENT UNITPage 26
ABOUT THE AUDIO SCOPE AND OSCILLOSCOPE
AUDIO SCOPE AND OSCILLOSCOPE
[
KEY2
(
MODE
)]
Key
The SCAN MODE for the left-side Audio Scope can
be changed. Pressing this key changes The Audio Scope
mode as follows:
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.”
[
KEY3
(
SOURCE
)]
Key
Pressing this key repeatedly changes the source for the au-
dio to be viewed by the Audio Scope. The selections are:
VFO-A
VFO-B
EXT
VFO-A
......
When “EXT” is selected, you can observe the audio
wave form of a signal input provided by equipment
connected to the AUDIO IN jack on the rear panel of
the DMU-2000.
[
KEY4
(
ATT
)]
Key
(
Attenuator
)
This key permits adjustment of the Audio Scope at-
tenuation. Set the appropriate value based on the re-
ceived signal.
0 dB
10 dB
20 dB
0 dB
......
[
KEY6
(
LEVEL
)]
Key
This key permits adjustment of the sensitivity of the
Oscilloscope 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 condi-
tions present. Available values are:
0.3 V
0.1 V
1.0 V
0.3 V
......
[
KEY7
(
SWEEP
)]
Key
This key permits adjustment of the sweep time for the
Oscilloscope. Adjust this setting while viewing the
screen. Available sweep times are:
10 ms
30 ms
100 ms
300 ms
1 s
10 ms
......
[
KEY8
(
DISPLAY
)]
Key
Press this key briefly to toggle the Function key op-
erations between the “Page Select Keys” and the
“Function Keys.”
Press and hold in this key to disable DMU-2000 con-
trol, and return the key buttons to control the FT-2000/
D, FT-950, or FTDX5000 operations.
 
The Audio Scope and the Oscilloscope displays are shown
on the screen simultaneously.
With the Audio Scope, the horizontal line represents fre-
quency, and you can use this function to view the frequency
response within the RX or TX bandwidth. In the Oscillo-
scope mode, the horizontal line represents time, and you
can view the RX signal waveform within the RX band-
width. The TX waveform is shown during transmissions.
If the “Audio Scope / Oscilloscope” screen does not ini-
tially appear, press the
[
KEY8
(
DISPLAY
)]
key to switch
the Function key operations to “Page Select Key,” then
press the
[
KEY3
(
AF SCOPE
)]
key briefly to display the
“Audio Scope / Oscilloscope” screen. Next, press the
[
KEY8
(
DISPLAY
)]
key again to switch the Function key
operations to the “Function Keys.”
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.
FT-2000/D KEYS
FT-950 KEYS
FTDX5000 KEYS
28


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