Performance Tests
3
Installation and Verification Manual
97
Description
The Transmitter output is attenuated and set for appropriate
level using an external Power meter. The receiver sensitivity is
verified using the attenuated transmitter output and checking
for no errors in back-to-back mode. Checks of the receiver
operation at Operating Max and Min levels is performed. The
Receiver Optical Power and Frequency measurements are also
checked during these tests.
Sensitivity measurements are affected by the Extinction Ratio
of the laser used in the test. Receiver sensitivity specifications
are quoted for worst case, that is minimum laser extinction
ratio specification. A table is provided at the end of these tests
to check the typical additional receiver sensitivity expected
against the extinction ratio of the laser used in test.
Optical power
measurement
Supported for all optical receive rates.
Ranges
:
10 Gb/s: –3dBm to –25 dBm.
2.5 Gb/s: 0 dBm to –28 dBm.
622 Mb/s and below: 0 dBm to –30 dBm.
Accuracy
:
10 Gb/s: ± 1.5 dB.
2.5 Gb/s: ± 2 dB.
622 Mb/s and below: ± 1 dB.
Resolution:
0.1 dB.
Line frequency
measurement
Supported for all optical and electrical receive rates.
Results
: Frequency (MHz), Offset (Hz and ppm).
Accuracy:
± 4.5 ppm.
Resolution
:
Frequency:
0.01 kHz (up to 622 Mb/s),
0.1 kHz.(2.5 Gb/s and 10 Gb/s).
Offset:
0.1 ppm.
N O T E
The rates and wavelengths available are dependent on the OmniBER OTN
options fitted.
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