7. F.A.Q . OWON SDS7102, SDS9302, SDS6062

7. F.A.Q

7. F.A.Q

1. 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.

z Check whether the power connection is connected properly. z Check whether the power switch is pushed down to the designated position. z Check whether the fuse which is beside the

AC power input jack

is blew (the cover can be pried open with a screwdriver). z Restart the instrument after completing the checks above. z If this product still can not work normally, please get in touch with Lilliput and we will be under your service.

2. After acquiring the signal, carry out the following operations if the waveform of the signal is not displayed in the screen.

z Check whether the probe is properly connected to the signal connecting wire. z Check whether the signal connecting wire is correctly connected to the BNC

(namely, the channel connector). z Check whether the probe is properly connected with the object to be measured. z 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). z Make the signal acquisition operation again.

3. 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 (see “How to Set the Probe Attenuation

Coefficient” on P14).

4. There is waveform displayed, but it is not stable.

z Check whether the Source item in the TRIG MODE menu is in conformity with the signal channel used in the practical application. z Check on the trigger Type item: The common signal chooses the Edge trigger mode for Type and the video signal the Video. If Alternate trigger is selected, both of the channel 1 and channel 2 trigger levels should be adjusted to the proper position. Only if a proper trigger mode is applied, the waveform can be displayed steadily. z 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.

5. No Display Responses to the Push-down of Run/Stop.

Check whether Normal or Signal 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.

User Manual of Smart Digital Storage Oscilloscope 80

7. F.A.Q

6. After the Average value sampling is set in the Acqu Mode (see “How to Implement

Sampling Setup” on P42 ), or the longer duration is set in the Persist in Display (see

“Persist” on P46), the display rate is slowed down.

It is a normal phenomenon.

81 User Manual of Smart Digital Storage Oscilloscope