Viavi BN 2301/01, User Manual

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Chapter 1 Optical Spectrum Measurement
Table display
30 MTS / T-BERD 5800 • COSA-4055 • User Manual 2016.01
7. Direction:
Loc A and Loc B will be used as default. If Origin and
End Location are set in the Setup menu, these settings will be used
instead.
8. Date and time of measurement
9. The Advanced tab is disabled in the Table only view.
10. Selected channel
11. Table contents:
For further details see following sections
"Table contents" on
page 30 , and "Table statistics" on page 31 .
Table contents
According to the choice made in the S
ETUP
menu, the table of results
may include:
–
either a line for each channel detected (if Channel Selection =
Permanent)
– or a line for each graduation, (if Channel Selection = Grid and a grid
is selected)
In the absence of statistics (see "Analysis parameters" on page 12 ) the
parameters given for each channel are as following:
Channel The number of the channel
Wavelen. – Absolute mode: the frequency or the wavelength
of the selected channel in [THz] or in [nm]
– Relative mode: the frequency or wavelength
difference to the reference channel
Offset/Spacing The column depends on the Channel detection
setting:
–
Grid: Offset shows deviation from Grid wave-
length in [GHz] or in [nm]
– Permanent: Spacing shows spacing between the
channels in [THz] or in [nm]
Level – Absolute mode: the level of the channel in [dBm[
–
Relative mode: the difference level to the refer-
ence channel in dB
For the COSA-4055 this parameter indicates the peak
channel power level.
P/Pcomp The ratio between the power of the channel and the
composite power in [%].