50
Verification Manual
1
Performance Tests
10
Add more attenuation by increasing the optical attenuator
setting to find the point just before the occurrence of errors.
This can be done by observing the Errors LED while
adjusting attenuator. Record the additional attenuation
setting (typically this will be at least 1 dB). Press
<Run/Stop>
to stop measurement.
11
Set the optical attenuator to the setting noted in
step 6
, then
reduce setting by a further 4 dB (that is, providing –30 dBm
output).
Set the OmniBER OTN’s receiver to display
Optical Power
as
follows:
Press
<Smart Test>
, choose
Shortcuts > Optical Power
then
press
<Select>
. Set
Wavelength
to 1310/1550 nm as
appropriate.
Check that the optical power measurement reads between:
-31 dBm and -29 dBm
Verification.book Page 50 Monday, January 19, 2004 1:40 PM
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