pdhman.book : pdhapp.doc 52 Tue Oct 14 15:00:20 1997
52
PDH / DSn Testing With The HP 37717C
Frequency Offset Tolerance
If checking frequency offset tolerance at SDH rates one of the following options
must be fitted:
• US1 (US5) or A1T (A1U) - SDH Module (STM-1 electrical)
• UH1 or UH2 or URU (STM-1 or STM-4 optical)
This setup procedure tests the clock recovery capability of the line terminal
equipment at 34 Mb/s using a PRBS pattern connected to the 75Ω interface. The
frequency of the generated data is offset and the data is looped back and monitored
for errors.
Figure 2 Frequency Offset Tolerance Test
1. Set up the
display as shown below.
Any settings change made on the
or displays will
automatically occur on the other.
OTHER
SETTINGS
CONTROL
TRANSMIT
RECEIVE
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