Selecting Test Features
Adding Frequency Offset to SONET Signal
| Adding Frequency Offset to SONET Signal |
Description | Frequency offset can be added to the SONET interface rate signal and to |
| the payload signal. |
1Choose the amount of frequency offset required.
You can set the Frequency Offset in the range
in 1 ppm steps using DECREASE DIGIT 
INCREASE DIGIT 
and
.
The amount of applied Frequency Offset can be varied while measurements are taking place.
If the value of the SONET 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. When Floating Byte 2 Mb/s is chosen, in conjunction with SONET line rate offset, the chosen tributary will be offset as the line rate is offset. (No pointer movements).
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