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Chapter 12 High Resolution OSA Measurement
Configuration of the instrument
Noise Acq. BW
OSNR meas.type
Splitter compensation
When the measurement is made after a tap coupler (also known as a splitter), it is
possible to compensate for the loss introduced by this element and to display the value
measured before or after it.
Go to the
Splitter compensation
options
1
Value
Unit
For example, with a 10 dB splitter, the results will be augmented by 10 dB. The trace will
be offset upwards by 10 dB. A channel measured at -30 dBm will be displayed -20 dBm.
Display
Spectral Unit
Here the units of the x axis can be selected:
•
Frequency in THz
388
- Pre-defined: select 25 GHz (0.2 nm), 50 GHz (0.4 nm),100 GHz (0.8 nm)
from the peak.
- Left & Right: manually define different left and right distances from the
peak
Reference bandwidth used for the acquisition of noise:
- standard 0.1 nm
- with the <> keys you can select other values between 0.05 nm and 1.0
nm.
S / N or (S+N)/N
- S/N: the integrated power in the channel minus the noise is considered as
signal
- (S+N)/N: the integrated power in the channel without correction is consid-
ered as signal.
Activation of compensation and choice of its value using the keys
and
: or the numeric keypad : from 1 to 30 dB (by increments of 1)
or 1 to 99% (by increments of 0.1%). Select None on the numeric
keypad to not activate the compensation.
Choice of compensation in dB or as a percentage of the value
measured.
User Manual
line to display a sub-menu proposing the following
78000010220 Rev. 024
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Troubleshooting
