Viavi OSA-4100 User Manual page 18

Configuration
On-Off OSNR methode
∗
18/59
OO-OSNR method
∗
The OO-OSNR mode is used to measure the channel
OSNR in a two step process. When selecting the OO-
OSNR in the Setup Measurement menu, a new button
on the second result-screen is presented.
Table 4.1: OO-OSNR measurement softkey
the first measurement is used as reference scan with the
channel signal being switched on.
• Select the Ref.Acq checkbox
• hit start to begin acquisition
the second scan will measure the noise-floor within this
channel, while the signal has to be switched off by the
user.
• switch off the signal of the desired channels
• select Noise Acq checkbox
• hit start to begin acquisition
Nano-OSA user manual