Exfo FTB -5240S/5240BP Optical Spectrum Analyzer for FT Manual de usuario Pagina 310

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Managing Results
302 FTB-5240S/5240BP
Managing WDM Test Results
4. Edit the thresholds as explained below:
³ Wavelength/Frequency (nm/GHz): indicates the channel’s central
wavelength/frequency.
³ Signal power (dBm): indicates the signal power for the selected
channel (excludes noise).
³ OSNR (dB): is the 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).
³ Noise (dBm): indicates the level of the noise for the selected
channel.
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