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SYSTEM PROMPTS
Definitions of System Prompts
1.
Adjustment at Ultimate Limit: This informs you that the multifunction control knob
has reached its adjustment limit in the current status. No further adjust is possible.
When the vertical deflection factor switch, time base switch, X shift, vertical shift
and trigger level adjustments have reached their ultimate limits, this prompt will
appear.
2.
USB Device Installed: After a USB device is plugged into the oscilloscope, this
prompt appears when the connection is valid.
3.
USB Device Unplugged: After a USB key is unplugged from the oscilloscope, this
prompt appears:
4.
Saving...... : When the oscilloscope is saving a waveform, this prompt is shown on
the screen. A progress bar appears at the bottom.
5.
Loading...... : During waveform recall, this prompt is shown on the screen. A
progress bar appears at the bottom.
6.
Function Disabled: This prompt appears when [ZOOM] is pressed at 5ns-100ns
time base.
TROUBLESHOOTING
1.
If the screen of your oscilloscope remains black without any display after powering
on, follow the steps below to find the cause:
•
Check if the power switch is properly pressed.
•
Plug in the DC power adaptor and check if the battery is out.
•
Check the power cable connection.
•
Restart the unit after performing the above checks.
•
If the unit still fails to power on, contact UNI-T to request service.
2.
If no waveform is displayed after you have acquired a signal, follow the steps below
to find the cause:
•
Check whether the probe is properly connected to the signal lead.
•
Check whether the signal lead is properly connected to the BNC (channel
adaptor).
•
Check whether the probe is connected properly to the object to be measured.
•
Check whether the object for measurement is generating signals (connect the
channel with signals to the questionable channel to find the cause).
•
Restart the acquisition process.
3.
The measurement voltage amplitude value is 10 times larger or smaller than the
actual value:
•
Check if the channel attenuation factor corresponds with the probe attenuation
you have chosen.
4.
There is waveform display but it is not stable:
•
Check the trigger source setup in the trigger menu. See whether it is the same
as the actual signal input channel.
•
Check the trigger type: Use edge trigger for ordinary signals and video trigger
for video signals. Stable waveform display is achieved only when the correct
trigger mode is selected.
•
Try changing the coupling display to high frequency suppression or low
frequency suppression to filter any high or low frequency noise that is
interfering with triggering.
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