User manual

RIGOL Chapter 12 Troubleshooting
DG4000 User's Guide
12-2
(5) After finishing the above inspections, press Utility  System 
PowerOn to select "Last" and then restart the instrument.
(6) If it still does not work correctly, please contact RIGOL.
5. The USB storage device cannot be recognized:
(1) Check whether the USB storage device can work normally when
connected to other instruments or PC.
(2) Make sure to use FAT32 formated USB storage device which is flash type.
The generator doesn’t support hard drive-based USB storage device.
(3) Restarting the instrument and insert the USB storage device again to
check whether it can work normally.
(4) If the USB storage device still cannot be used normally, please contact
RIGOL.
6. How to set the amplitude of the waveform in dBm?
1) Press CH1 or CH2 to select the desired channel.
2) Press Utility  CH1Set (or CH2Set)  Imped to check whether the
setting is "HighZ". If yes, you cannot set the amplitude of the waveform
in dBm at this time. Press Imped to select "Load" and use the numeric
keyboard or the direction keys and knob to set the impedance to a proper
value.
3) Select the desired waveform and press Ampl/HiLevel to highlight
"Ampl". Input the desired value using the numeric keyboard and select
the unit "dBm" from the pop-up menu.
7. The instrument does not pass the performance verification test:
1) Check whether the generator is within the calibration period (1 year).
2) Check whether the generator is warmed up for at least 30 minutes before
the test.
3) Check whether the generator is
under the specified environment
temperature.
4) Check whether the test is under strong-magnetic environment.
5) Check whether the power supplies of the generator and test system have
strong interference.
6) Check whether the performance of the test device used meets the
requirement.
7) Make sure that the test device used is within the calibration period.