Owon TAO3000 Dual-Channel Series, User Manual

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9.Troubleshooting
125
9. Troubleshooting
1. Oscilloscope is powered on but no Display.

Check whether the power connection is connected properly.

Restart the instrument after completing the checks above.

If the problem persists, please contact OWON and we will be under your
service.
2. After acquiring the signal, the waveform of the signal is not displayed in
the screen.

Check whether the probe is properly connected to the signal connecting
wire.

Check whether the signal connecting wire is correctly connected to the
BNC (namely, the channel connector).

Check whether the probe is properly connected with the object to be
measured.

Check whether there is any signal generated from the object to be
measured (the trouble can be shot by the connection of the channel from
which there is a signal generated with the channel in fault).

Make the signal acquisition operation again.
3. The measured voltage amplitude value is 10 times or 1/10 of the actual
value.
Look at the attenuation coefficient for the input channel and the attenuation
ration of the probe, to make sure they are match
(see " How to Set the Probe
Attenuation Coefficient " on P11).
4. There is a waveform displayed, but it is not stable.

Check whether the Source item in the TRIG MODE menu is in conformity
with the signal channel used in the practical application.

Check on the trigger Type item: The common signal chooses the Edge
trigger mode for Type and the video signal the Video . Only if a proper
trigger mode is applied, the waveform can be displayed steadily.

Try to change the trigger coupling into the high frequency suppress to
smooth the high frequency noise triggered by the interference.
5. No Display Responses to the Push-down of Run/Stop.
Check whether Normal or Single is chosen for Polarity in the TRIG MODE
menu and the trigger level exceeds the waveform range.
If it is, make the trigger level is centered in the screen or set the trigger mode as
Auto. In addition, with the
Autoset button pressed, the setting above can be
completed automatically.
6. The displaying of waveform seems getting slow after increasing
AVERAGE value in Acqu Mode (see " Implement Sampling Setup " on P48 ) ,
or a longer duration is set in the Persist in Display (see " Persist " on P53) .
It's normal as the Oscilloscope is working hard on many more data points.