EXFO FTB-5500B PMD Analyzer - Manual (Page 98)

Troubleshooting
90 FTB-5500B
Solving Common Problems
Low signal-to-noise ratio. Power too-low in the
selected band.
³
Use a source with a
higher output power.
³
Clean connectors
carefully.
³
Ensure connections are
made properly.
³
Ensure the source
wavelength matches the
selected band for the
Polarization Mode
Dispersion Analyzer.
Possible coupling mode
selection error.
The selected coupling mode
(Telecom or
Polarization-Maintaining)
does not match the coupling
mode the Polarization Mode
Dispersion Analyzer detects.
Calculation will be
performed using the
selected coupling mode.
Ensure that the selected
coupling mode is
appropriate.
The signal is too low to
compute a PMD value. The
acquisition operation was
canceled.
³
Power too-low in the
selected band.
³
The source being used
is modulated.
³
Ensure the input power
is sufficient.
³
Use a LED or SLED
source.
The signal is saturated.
Unable to compute PMD
value. The acquisition
operation was canceled.
Power is too high. Reduce the source output
power.
Message Possible cause Solution