pdhman.book : pdhapp.doc 29 Tue Oct 14 15:00:20 1997
29
PDH / DSn Testing With The HP 37717C
Analysis of N X 64 kb/s
Analysis of N X 64 kb/s
Options Required Structured PDH UKJ (USA) or UKN (USE)
Application
Many customer premises receive subrate signals for example 128 Kb/s or 384 kb/s.
The timeslots which make up these services may or may not be contiguous. Testing
these services requires that the test set to be able to insert a pattern across the
required timeslots.
Testing N X 64 kb/s channels structured within a 2 Mb/s signal can be carried out on
an End to End basis using two test sets.
Default (Known State) Settings
It can be advisable to set the HP 37717C to a known state prior to setting up to make
a measurement. This clears all previous settings and provides a clearly defined
instrument state. For a list of Default Settings and the procedure for accessing them
see Stored Settings in the Mainframe Operating Manual.
Test Setup Procedure (N X 64 kb/s Analysis)
This setup procedure is interfaced at 2 Mb/s, with a test signal of 6 X 64 kb/s non-
contiguous timeslots. A PRBS test pattern is transmitted across the 6 timeslots. A
BER measurement is performed on the received test pattern.
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