34
Verification Manual
1
Performance Tests
4
Set OmniBER OTN
Laser
to
ON
and set optical attenuator to
Enable.
5
On the oscilloscope select
Setup
> Channel 1 > Advanced
settings.
Switch oscilloscope Channel 1 ON, set it to the
correct optical wavelength for the signal being tested and set
Mask Filter
to
OC-3 (156Mb/s), ON
, see Note.
6
Set all other oscilloscope channels off.
7
Select
Eye/Mask Mode
,
Mask Test.
Select
Open Mask
and
open the
STM000_OC1.msk
.
8
Select oscilloscope
Autoscale
and allow the oscilloscope to
find signal and trigger inputs.
86100A Optical Oscilloscope
TX Eye Clock
Optical Output
Trigger
CH1
Optical
I/P
I/P
86103A
8156A Optical Attenuator
OmniBER OTN
N O T E
Normally an OC-1 filter would be used, however as this may not be
available, it is permissible to use the OC-3 Filter for this check. The
procedures for higher bit rates using OC-3, OC-12 and OC-48 filters will
give confirmation that laser overshoot response is as expected.
Verification.book Page 34 Monday, January 19, 2004 1:40 PM
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