SIGLENT
SDS1000CFL Service Manual 43
Troubleshooting
This chapter explains how to deal with general troubles that you may
encounter while operating SDS1000CFL series oscilloscope.
General troubles
1. The screen remains dark after power on:
(1) Check if the power cord is correctly connected.
(2) Check whether the fuse is burned out. If the fuse needs to be changed,
please contact with SIGLENT as soon as possible and return the
instrument to the factory to have it repaired by qualified personnel
authorized by SIGLENT.
(3) Restart the instrument after completing inspections above.
(4) If it still does not work normally, please refer to the Display
Troubleshooting or contact SIGLENT.
2. After the signal is sampled, there is no corresponding waveform displaying:
(1) Check if the signal connecting cord is correctly connected to BNC
connector.
(2) Check if the Intensity knob on the front panel is properly adjusted.
(3) Check if the probe is correctly connected to the item under test.
(4) Check if there are signal generated from the item under test
(You can connect the probe compensation signal to the problematic
channel to determine the reason to the problem )
(5) Resample the signal.
3. The voltage amplitude measured is higher or lower than the actual value
(this error usually occurs in use of probe):
(1) Check if the attenuation coefficient of the current channel matches with
the attenuation ratio of the probe.
(2) Check if the Input impedance(only designed selectable between 1M
Ω
and 50
Ω
inside CFL) in CH1 menu is correctly matches with that set
inside arbitrary Waveform Generator that connected.
4. There is waveform displaying but not stable:
(1) Check the trigger source: check whether the “Source” in menu of “TRIG”
is the actual operating channel.
(2) Check if the waveform is wrong: it is easy for us to regard the wrong
waveform as the real when a high frequency signal is connected to the
instrument. You’d better make sure that the current time base is correct
for the frequency of input signal.
(3) Check the trigger type: “Edge” trigger suits to general signal and “Video”
trigger suits to video signal. Only in correct trigger type can the
waveform stably display.
