Anritsu MS9740B - Troubleshooting

7.8 Troubleshooting
7-17
7
Performance Test and Maintenance
7.8 Troubleshooting
Check the items in Table 7.8-1 if a failure occurs during operation of the
MS9740B.
If the failure is not improved, contact an Anritsu Service and Sales office
immediately. Contact information can be found on the last page of the
printed version of this manual, and is available in a separate file on the
PDF version.
Table 7.8-1 Check Items
Phenomenon Possible cause Action
Power switch lamp
not lit orange
Abnormal/no voltage at power
outlet
Check power supply circuit breakers and
board.
Power cord not fully inserted
into power outlet or inlet
Connect the power cord correctly.
Change a damaged power cord.
Cannot connect
optical fiber cord
Fiber and main frame have
incompatible connectors
Change the fiber type or change the optical
connector of the main frame.
Optical fiber cord not
connected correctly
Check the connector insertion.
Waveform does not
change when
Single
or
Repeat
pressed
Trace set to not display at
Write
Change the trace display settings.
When external pulse trigger
set to ON, pulse not input to
Ext Trigger connector
Set Ext Trigger Delay to Off or check the
waveform of the signal input to Ext Trigger.
Waveform not
displayed
When using external trigger,
measures at optical level Off
timing
Set Ext Trigger Delay to Off.
Dirty optical connector
Clean the optical connector.
All traces set to Display Off
Set the trace display to On.
Trace type set to Blank
Set at least one trace type to Write.
Long sweep time
Rx optical bandwidth set too
narrow
For a short sweep time, refer to Appendix E
“Video Band Width and Sweep Time” and
increase the Rx optical bandwidth.
Point averaging set
For a short sweep time, decrease the point
average count.
Large sampling points set
For a short sweep time, decrease the
sampling points.
High dynamic range mode set
For a short sweep time, change the dynamic
range mode to Normal.