USER MANUAL 750000992/16
7-3
MTS
e
OSA test setup
Detection parameters
Channel Detection
1
1st swap Channels of the first measurement serve as a detection reference.
Grid Manual, ITU and Auto grid serve as a detection reference.
Note The grid selection has priority on the "Channel Detection". For exam-
ple it is not possible to choose Channel Detection = Grid, if the grid
option is Off or Convent.
Signal Threshold
1
Channel detection threshold (see "Threshold of channel detection" on page 7-7).
Auto Threshold is automatically determined.
Manual from -79.9 to + 20 dBm.
Statistic Mode
Ye s / N o To use or not to use statistics.
Note A change in the «Channel Detection» and «Signal Threshold»
parameters will be only transferred to the trace, if the used WDM
module is the one used for acquisition.
Signal/Noise parameters
SNR Method
1
Side of the peak where the reference point for the noise is taken (Left, Right, Left
& Right).
S<-> N Distance
1
Distance between the channel peak and the reference point for the noise.
Auto distance determined according to the interval (space) between
channels.
at 0.2/ 0.4 / 0.8 nm if the unit is nm
(or at 25 GHz, 50 GHz, 100 GHz if the unit is THz)
of the value corresponding to the peak.
Noise Acqu BW
Reference bandwidth used for noise acquisition:
- standard 100 pm
- values ranging from 10 pm to 10 000 pm.
1. Caution: every change in this parameter is immediately transferred to the trace,
leading to the loss of the statistics.
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