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Performance Tests
STM-1/STM-4, 1550nm Optical Interface (Option URU)
The Protected Monitor Point (PMP) functionality is verified by looping the HP
37717C Optical Output to the PMP input via an Optical Attenuator and Optical to
Electrical Converter, then checking for error-free operation with identical Tx and Rx
patterns selected. The specified electrical level for the PMP input is obtained by
adjusting the optical signal level to the O/E Converter using the Optical Attenuator.
Equipment Required
CAUTION The performance of Optical Interfaces will be seriously impaired if any dirt or
contamination is present on the interface connectors. Always cover the ends of
optical cables and connectors with protective caps when not in use.
Always examine the ends of each fibre optic cable before use and if visible
contamination is present DO NOT USE - Dirt is easily transferred to the Optical
Module connector causing permanent damage. The cable should be replaced or
cleaned - If cleaning, refer to Hewlett-Packard booklet Lightwave Connection
Techniques for better measurements. HP Part Number 08703-90028.
Procedure
1. Set the Optical Attenuator to ATTEN 0 dB, WAVELENGTH 1550 nm ; CAL=0.
Connect the HP 37717C STM1/4 Optical Out Port to the HP 8153A Power Meter via
the HP 8157A Optical Attenuator - ensure that all connections are tight and that
optical cables have no twists or tight bends.
Power Meter : HP 8153A
Power Meter Sensor Module : HP 81536A
Oscilloscope : HP 54503A
Dual Power Supply (+/-12V) : HP 6253A
Lightwave Receiver : HP 83442A opt 012
Optical Attenuator : HP 8157A
FC/PC Connector Interface : HP 81000FI (Qty. 4)
Optical Cables (qty 2) : HP 11871A
Adaptor (SMA to BNC) : HP 1250-1787
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