Chapter 4 System Prompts And Trouble-Shooting; Definitions Of System Prompts; Troubleshooting - UNI-T UTD4000 Series User Manual

Chapter 4 System Prompts and
-
Trouble shooting

Definitions of System Prompts

Adjustment at Ultimate Limit :
the multifunction control knob has reached its
adjustment limit in the current status. No further
adjust is possible. When the vertical graticule factor
switch, time base switch, horizontal shift, vertical shift
and trigger level adjustment have reached their
ultimate limits, this prompt will appear.
USB Device Installed : After a USB device is plugged
into the oscilloscope, this prompt appears when the
connection is valid.
USB Device Unplugged :
un plu gg ed fr om the o s ci ll os c ope , thi s p ro mp t
appears.
Saving : When the oscilloscope is saving a waveform,
this prompt is shown on the screen. A progress bar
96
This informs you that
After a USB key is
UTD4000 Four-channel User Manual
appears at the bottom.
Waiting : This prompt appears on the screen during
auto calibration. A progress bar appears at the
bottom.
I/O Failure : When USB communication fails or no
document meeting specific requirements is found on
the USB device, this prompt appears.
Function Disabled : When [
the dual time base mode, this prompt appears.

Troubleshooting

1. If the screen of your oscilloscope remains black
without any display after powering on, follow the
steps below to find the cause :
①
Check the power cable connection and check
if there is normal power supply.
②
Check if the power switch is properly pressed.
③
Restart the unit after performing the above
checks
MATH ] key is pressed in