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Performance Tests
External 2Mb/s Demux (Options UKL, [USC])
External 2Mb/s Demux (Options UKL, [USC])
Specifications
Description
This test verifies operation of the demux hardware and confirms the output
characteristics of the external demux port on the SPDH Receive Only option.
The Structured PDH Test Set is set up to transmit a structured 140Mb/s signal
containing an unframed 2Mb/s pattern. This is applied to the HP 37717C PDH IN
Port. The unframed 2Mb/s signal is Demultiplexed from the 140Mb/s data stream to
the HP 37717C DROP port. The DROP Port signal is then applied to the Structured
PDH Test Set and a BER test is performed to verify the integrity of the 2 Mb/s
signal.
The output from the DROP Port is then applied to an oscilloscope, and the
waveform characteristics are checked to ensure they meet specifications.
Equipment Required
NOTE The Test Set used in this procedure is an HP 37717C Option UKJ. Any other
Structured PDH Test Set, capable of generating an unframed 2 Mb/s signal within a
structured 140 Mb/s, can be used.
Frequency 2.048 Mb/s
Interface Meets section 6 of ITU Rec. G.703, for unbalanced coaxial pair.
HDB3 line coding only.
Oscilloscope : HP 54503A
PDH Test Set : HP 37717C Option UKJ or equivalent (See Note)
75Ω Termination : HP 15522-80010
50/75Ω Matching Pad : HP 11852B
T Connector : HP 1250-0781
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