User`s guide

RIGOL Chapter 5 Troubleshooting
5-2 DSG3000 User’s Guide
4. The setting is correct but the waveform output is incorrect:
(1) There is no RF output
— Check whether the signal connecting cable is tightly connected to the
corresponding [RF OUTPUT 50Ω] connector.
— Check whether the connecting cable has internal damage.
— Check whether the connecting cable is tightly connected to the test
instrument.
— Check whether the backlight of RF goes on. If not, press this key to
illuminate the backlight. At this point, the RF label is displayed in the
status bar of the user interface and the RF output is enabled.
— Check whether the output amplitude of the RF signal is too small.
Adjust the output amplitude properly.
(2) The RF output is not modulated
— Check whether the signal connecting cable is tightly connected to the
corresponding [RF OUTPUT 50Ω] connector.
— Check whether the connecting cable has internal damage.
— Check whether the connecting cable is tightly connected to the test
instrument.
— Check whether the backlights of MOD and RF are both illuminated
and check whether the modulation Switch is set to “On”.
— Check whether the modulation parameter setting is correct and adjust
the parameter appropriately.
— If external modulation source is used, make sure that the external
source is correctly connected and outputs signal. At the same time, the
external source should work within the specified range of the signal
generator.
5. The sweep is abnormal:
(1) The seep stagnates
The sweep progress bar is displayed in the frequency area/amplitude area
in the user interface indicating that the sweep is in progress. If the sweep
stagnates, please check:
— At least one manner of sweep is enabled. Press SWEEP  Sweep to
select “Freq”, “Level” or “Freq & Level”.
— If single sweep mode is selected, press Single and the instrument
performs a sweep if the trigger condition is met.
— If the sweep trigger mode is not set to auto, press SWEEP  Trig 
“Auto” to make sure whether the sweep stagnates due to the loss of
sweep trigger.
— If the point trigger mode is not set to auto, press SWEEP  Point
Trig  “Auto” to make sure whether the sweep stagnates due to the
loss of point trigger.
— Make sure whether the dwell time is too large or too small that the
sweep cannot be seen.
— Make sure that at least two points are set in the step sweep or list
sweep.