Exfo FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 Instrukcja Użytkownika Pobierz pdf (Strona 66)

Setting Up the Instrument in WDM Mode

60 FTB-5230S/-OCA

Defining Preferences

2. Select the WDM Results tab.

3. Select which parameters you want to display in the Results tab from

the list of available choices:

 Name: name of channel.

 (Center wavelength/frequency): spectral center-of-mass for the

peak in that channel.

 Signal Power: signal power for the selected channel (excludes

noise).

 OSNR: optical signal to noise ratio, given by Signal power

(according to the current calculation method, in dBm), minus

Noise (according to the current calculation method, in dBm).

 Noise: noise level for the selected channel. The type of noise is

indicated in front of the measurement (IEC, Fit).

 BW 3.00 dB: bandwidth measured by taking the width of a signal at

50 % linear power of the peak, or -3 dB from the peak.

 BW at x dB: bandwidth measured by taking the width of a signal at

x dB from the peak.

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Exfo FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 Instrukcja Użytkownika Strona 66