Metrix DOX3104 Guide De Démarrage page 35

2. Troubleshooting
The general failures and consequential solutions are
listed below. When you find them, please deal with them
in the following corresponding ways. If the problem
proves to be unsolvable by you, please contact CA as
soon as possible.
1. The screen remains dark after power on:
1) Check if the power is correctly connected.
2) Check if the power switch is faulted.
3) Check whether the fuse is burned out. If the fuse
needs to be changed, please contact CA as soon as
possible and return the instrument to the factory to
have it serviced by authorized qualified personnel.
4) Restart the instrument after completing inspections
above.
5) If it still does not work normally, please contact CA.
2. After the signal is sampled, there is no
corresponding waveform displaying:
1) Check if the probe is correctly connected to the
signal connecting cord.
2) Check if the signal connecting cord is correctly
connected to BNC.
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.
5) Resample the signal.
English
3. The voltage amplitude measured is higher or lower
than the actual value (the error usually occurs in use of
the probe): check if the attenuation coefficient of the
current channel matches with the attenuation ratio of the
probe.
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.
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.
4) Change the setting of trigger holdoff.
5. No display after pressing
Check whether the trigger Mode is "Normal" or "Single",
and if the trigger level exceeds the waveform range. If
yes, set the trigger level to the middle or change the
trigger Mode to "Auto".
Note: press "Auto Scale" could automatically replace the
above setting.
34