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October 2014
Page
115
5 TROUBLESHOOTING
►
In the case of that the oscilloscope is still in the black-screen state
without any display after the power is switch on, implement the
following fault treatment procedure.
Check whether the power connection is connected properly.
Check whether the power switch is pushed down to the designated
position.
Restart the instrument after complete the checks above.
If this product still can not work normally, please get in touch with
Lilliput and we will be under your service.
►
After acquiring the signal, carry out the following operations if the
wave form 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.
►
The measured voltage amplitude value is 10 times greater or
smaller than the actual value.
Check whether the channel attenuation coefficient and the attenuation
ration of the probe used in practical application is match.
►
There is wave form 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 wave form can be displayed steadily.
Try to change the trigger coupling into the high frequency suppress
and the low frequency suppress to smooth the high frequency or low
frequency noise triggered by the interference.