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Performance Tests
External Mux/Demux
External Mux/Demux
Specifications
NOTE The Mux/Demux Rate available is dependent on the HP 37718A/19A
option.
Description
This test verifies operation of the PDH/DSn Mux and demux hardware
and confirms the output characteristics of the external demux port on
the PDH/DSn Receiver.
The PDH/DSn Test Set is set up to transmit an unframed 2Mb/s/DS-1
pattern. This is applied to the HP 37718A/19A INSERT Port. The 2Mb/s/
DS-1 signal is multiplexed into a 34Mb/s/DS-3 data stream. The HP
37718A/19A transmitter and receiver are looped. The unframed 2Mb/s/
DS-1 signal is Demultiplexed from the 34Mb/s/DS-3 data stream to the
PDH/DSn Test Set via the HP 37718A/19A DROP port. A BER test is
performed to verify the integrity of the 2 Mb/s/DS-1 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
Rate Interface Source
2.048 Mb/s (E1) Meets ITU-T Rec.
G.703 for unbalanced
coaxial pair.
Accepts a 2 Mb/s Unbalanced
signal conforming to ITU-T
Rec. G.703.
1.544 Mb/s (DS-1) Meets T1.102-1993
for Balanced pair.
Accepts a DS-1 balanced
signal conforming to T1.102-
1993.
Oscilloscope : HP 54520A Option 001
PDH Test Set : HP 37718A/19A
75Ω Termination
: HP 15522-80010
T Connector : HP 1250-0781
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