Exfo FTB-5700 Single Ended Dispersion Analyzer for FTB- Instrukcja Użytkownika Pobierz pdf (Strona 73)

Troubleshooting

Single-Ended Dispersion Analyzer 67

Solving Common Problems

PMD-Related Problems

Message Possible cause Solution

Conditions are not optimal

for measuring polarization

mode dispersion. Cannot

perform measurement.

Too much loss in the fiber

under test.

³ Clean the fiber end.

³ Add a reflective

termination at the end

of the fiber.

Unable to ensure a correct

PMD measurement over the

selected wavelength range.

Measurement wavelength

range is to wide.

Try to narrow down the

measurement wavelength

range.

Optical power is not strong

enough to ensure a correct

PMD measurement over the

selected wavelength range.

Too much loss in the fiber

under test.

³ Clean the fiber end.

³ Add a reflective

termination at the end

of the fiber.

³ Reduce the wavelength

range in the Acquisition

tab of the Setup

window, or select

Default as the

wavelength range value.

Unable to ensure a correct

PMD measurement over the

selected wavelength range

because the detector is

saturated.

³ Fiber end is too

reflective.

³ Unsuitable selected

wavelength range for

the measured FUT (out

of the FUT bandwidth).

³ Unsuitable FUT. The

FUT must not cut the

1550 nm wavelength.

³ If you have put a

reflective termination at

the end of the fiber,

remove it.

³ Select a wavelength

range that suits the FUT

and the instrument

range. You can set the

wavelength range in the

Acquisition tab of the

Setup window.

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Exfo FTB-5700 Single Ended Dispersion Analyzer for FTB- Instrukcja Użytkownika Strona 73

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