Performance Tests
3
Installation and Verification Manual
81
Optical Pulse Mask and Output Characteristics
Specifications
the
Description
This test ensures the Optical Transmitter(s) output power level
and waveform meet the required eye mask, extinction ratio and
average power specifications. The Transmitter output is
connected to an Optical Oscilloscope and the eye compared
with the predefined masks stored in the oscilloscope memory.
The average signal power levels and Extinction Ratio are also
measured using the oscilloscope.
Optical Output Power
1310 nm
1550 nm (<=2.66 Gb/s)
1550 nm (9.95/10.71 Gb/s)
1550 nm (9.95/10.71 Gb/s)
-5 to +0 dBm *
-2 to +3 dBm *
-1 to +1 dBm * (version 1)
-5 to -1 dBm * (version 2)
* Typical transmit power level is in the middle of the stated range.
Check the stated Output Power on the instrument panel to determine if the
instrument has version 1 or version 2 optics fitted
Extinction ratio
>8.2 dB
Pulse mask
Meets ITU-T G-957 (6/1999) and Telcordia
GR-253-CORE Issue 3 (9/2000)
N O T E
These tests are identical for SONET or SDH modes and can be tested in
either mode and should not be repeated for both.
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