HP 37717C Operating Manual page 56

PDH / DSn Testing With The HP 37717C
Frequency Measurement
Run the Test (Frequency Measurement)
Connect the PDH / DSn IN port to the line
terminal equipment monitor point.
The measured frequency and amount of
offset from the internal standard is
displayed.
If the PDH / DSn frequency is different
from the selected BIT RATE the error
message Unable to recover clock appears
on the display. A FREQ reading is
displayed but this should be ignored.
At the End of the Test (Frequency Measurement)
Disconnect the HP 37717C from the line terminal equipment.
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