66
UNI-T
®
UT4000 User Manual
Chapter 4
⎯
System Prompts and Trouble-shooting
Definitions of System Prompts
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 knob, time base knob, horizontal shift, vertical shift and
trigger level adjustments 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 :
After a USB key is unplugged from the oscilloscope, this
prompt appears.
Saving :
When the oscilloscope is saving a waveform, this prompt is shown on the screen.
A progress bar 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 closing the LA function in the LA menu, this prompt appears
if the LA trigger key in the trigger [MENU] is pressed.
Troubleshooting
1.
If the screen of your oscilloscope remains black without any display after powering
on, follow the steps below to find the cause :
c
Check the power cable connection and check if there is normal power supply.
d
Check if the power switch is properly pressed.
e
Restart the unit after performing the above checks.
f
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 :
c
Check whether the probe is properly connected to the signal lead.
d
Check whether the signal lead is properly connected to the BNC (channel
adaptor).
e
Check whether the probe is connected properly to the object for measurement.
f
Check whether the object for measurement is generating signals (connect the
channel with signals to the questionable channel to find the cause).
g
Restart the acquisition process.
Summary of Contents for UT4000 Series
Page 13: ...2 UNI T UT4000 User Manual Figure 1 1 Front panel of UT4000 Oscilloscopes ...
Page 14: ...3 UNI T UT4000 User Manual Figure 1 2 Schematic diagram for operating the UT4000 front panel ...
Page 15: ...4 UNI T UT4000 User Manual Figure 1 3 Schematic diagram for the display interface ...
Page 74: ...63 Figure 3 14 Dual time base function ...
Page 98: ...87 UNI T UT4000 User Manual This user manual may be revised without prior notice ...
