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SONET_Usr.bk Page 42 Wednesday, December 13, 2000 11:11 AM
Selecting Test Features - SDH Operation
Adding Frequency Offset
Adding Frequency Offset
Description
Frequency offset can be added to the SDH interface rate signal and to the payload
signal.
HOW TO:
Add SDH Line Rate Offset
Choose the amount of frequency offset required.
You can set the Frequency Offset in the range -999 ppm to +999 ppm in 1 ppm steps
using
pop-up numerical keypad.
The amount of applied Frequency Offset can be varied while measurements are
taking place.
If the value of the SDH line rate offset chosen is sufficient to cause the maximum
stuff rate to be exceeded, the asynchronous payload is offset to prevent bit errors
occurring and the maximum stuff rate is maintained.
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DECREASE DIGIT
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