RIGOL Chapter 5 Troubleshooting
5-2 DSG800 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/on is illuminated. If not, press this
key to illuminate the backlight. At this point, the RF label in the function
status area in the user interface is illuminated and the RF output is
correctly turned on.
— 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/on and RF/on are both
illuminated and check whether the modulation Switch is turned on.
— Check whether the modulation parameter settings are proper and
adjust the parameters 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 RF signal
generator.
5. The sweep is abnormal:
(1) The sweep 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 turned on. Press SWEEP Sweep
to select "Freq", "Level" or "Freq & Lev".
— If single sweep mode is selected, press Single to meet the trigger
condition and the instrument performs a sweep.
— If the sweep trigger mode is not set to auto, press SWEEP Trig
Mod Auto to check whether the sweep stagnates due to the loss of
the sweep trigger.
— If the point trigger mode is not set to auto, press SWEEP Point
Trig Auto to check whether the sweep stagnates due to the loss of
the point trigger.
— Check whether the dwell time is too large or too small that the sweep
cannot be seen.
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