Selecting Test Features

Adding Pointer Adjustments

Adding Pointer Adjustments

Description The transmitted SPE or VT pointer value can be adjusted for testing purposes.

HOW TO:

1 Set up the SONET transmit interface and payload required. See

 

"Setting SONET Transmit Interface " page 4.

 

2 Choose the POINTER TYPE.

 

3 Choose the ADJUSTMENT TYPE required.

 

BURST - You determine the size of the burst by the number of

 

PLACES chosen. If, for example, you choose 5 PLACES the pointer

 

value will be stepped 5 times in unit steps e.g. 0 (start value), 1, 2, 3,

 

4, 5 (final value). The interval between steps is as follows:

 

For AU and TU-3, the minimum spacing between adjustments is

 

500 us. For VT the minimum spacing between adjustments is 2 ms.

 

Choose ADJUST POINTER [ON] to add the chosen burst.

 

NEW POINTER - You can choose a pointer value in the range 0 to 782

 

with or without a New Data Flag.

 

The current pointer value is displayed for information purposes.

 

Choose ADJUST POINTER [ON] to transmit the new pointer value.

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HP BER 718 37718A manual Adding Pointer Adjustments