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Verification.book Page 46 Monday, January 19, 2004 1:40 PM
1
Performance Tests
46
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The rates and wavelengths available are dependent on the OmniBER OTN
NO TE
options fitted.
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.
• These tests are identical for SONET or SDH modes and can be tested in either
NO TE
mode and should not be repeated for both.
• Always set the laser to OFF before changing optical output port connections.
• It is most important that advice on optical cleanliness is adhered to ensure
accuracy of these tests and to prevent damage to optical interfaces
Equipment Required
Power Meter
Power Meter Sensor Module
Optical Attenuator
FC/PC Connector Interface (qty 4)
Optical Cables (qty 2)
Agilent 8163A
Agilent 81633A
Agilent 8156A
Agilent 81000FI
Agilent PN 1005-0337
Verification Manual
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