HP 37717C User Manual page 105

Making Measurements
Measuring Round Trip Delay
4 Choose ACTION [ON] to start the measurement.
If measuring on an SDH/SONET interface, the results are available on
the
RESULTS
If measuring on a PDH interface, the results are available on the
RESULTS
The Round Trip delay measurement range is up to 2 seconds. The
resolution varies with the received interface signal rate:
2 Mb/s
8, 34, 140 Mb/s 10 microseconds
STM-1
94
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display.
PDH PAYLOAD
display.
PDH
1 microsecond
0.5 milliseconds