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Verification.book Page 35 Monday, January 19, 2004 1:40 PM
Verification Manual
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9 Start Mask Test and check the optical output meets the
mask. See example below.
OC-1/STM-0 Eye Mask
10 Set the oscilloscope to Eye Measure mode and select
Extinction Ratio measurement.
Ensure Vertical Calibration and Extinction Ratio Calibration have been
NO TE
performed for the oscilloscope channel and vertical sensitivity range to
ensure measurement accuracy. Refer to oscilloscope information/Help if
necessary.
11 Check the extinction ratio is greater than 8.2 dB and record
the measured value.
OC-3/STM-1 Power Level and Eye Mask Tests
12 Change the OmniBER OTN signal rate. Press <Menu>, choose
Tx/Rx > Transmitter Settings > Physical then press
<Select>. Set the Signal Rate to OC3.
13 Select Eye/Mask Mode, Mask Test. Select Filter and ensure
it is set to OC-3 (156Mb/s), ON
14 Select Open Mask and open the STM001_OC3.msk.
1
Performance Tests
35
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