EXFO FTB-5800 Chromatic Dispersion Analyzer for FTB-400 - Manual (Page 33)

Operating Your Chromatic Dispersion Analyzer
Chromatic Dispersion Analyzer 27
Verifying the Intensity of the Source
Verifying the Intensity of the Source
The intensity meters allow you to make sure a source is connected to the
other end of the link and that this source corresponds to the band you are
testing.
To verify the intensity of the source:
On the Parameters tab, consult the RF Intensity Meters indicators. Green
check marks indicate an appropriate intensity. Up or down arrows indicate
that the intensity is respectively too low or too high. You can also check DC
intensity from the DC Intensity Meter.
RF Intensity
Meter indicates...
Possible causes/solution
Power too low
(Signal is too
weak to be
measured)
³
Source is not active.
³
Source is active but in the wrong bandwidth.
³
Connected source is not an FLS-5800 CD/PMD Analyzer Source.
³
Source is defective.
³
Discontinuities in the optical link.
³
High-frequency modulation of the optical signal has been overly
reduced because of a saturated EDFA.
Power too high
(Signal is too
strong to be
measured)
³
Use the High Power port instead of the Low Power port.
³
Use an attenuator with a null dispersion to take your
measurement. For more information, please contact EXFO.