Viavi OneAdvisor ONA-800, Getting Started Manual

Page: 59 / 75

Chapter 3
Powermeter and VFL
Storing and reloading results
ONA-800 Getting Started Guide
Page 40 22142812, R011 April 2022
The measurement begins, and the results appear in the
Results
page and can be
retained in the table. See “Table of results” on page 38 for more information.
Optical link loss
The following procedure describes how to set the zero value of the power meter.
Setting the zero value of the power meter
1 Fix the plug or cap over the optical input of the power meter so that no light can
reach the photodiode of the power meter. If the zero adjustment is made without
this plug, an error message may be displayed, as the photodiode will detect too
much light.
2 On the Results page, press Setup > Zero and validate.
To carry out the reference measurement (1-jumper reference)
1
Fix the adapter corresponding to the jumper to the optical connector of the power
meter.
2 Connect the jumper between the input of the power meter and the output of the
source.
3
Configure the same wavelength on the source and the power meter.
The power measured is displayed on the results page of the power meter.
4 Press the Standard Ref softkey to save the result displayed as reference value.
After defining the reference value, proceed to the next procedure.
To perform measurements on the fiber under test
1 Fix the jumpers and connectors needed to connect the fiber to be tested between
the source output and the power meter input.
2 In the set-up menu, select dB units.
The power displayed in the Power Meter window corresponds to the optical loss
of the link tested. It can be displayed in the table, as described in “Table of results”
on page 38 .
Storing and reloading results
The following sections describe storing and reloading results.
CAUTION
Set the zero of the power meter before performing any low power level measure -
ment when accuracy is critical, as the noise from the photodiode may fluctuate
over time and with temperature.