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SONET_Usr.bk Page 45 Wednesday, December 13, 2000 11:11 AM
Description
HOW TO:
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Selecting Test Features - SDH Operation
Adding Pointer Adjustments
The transmitted AU or TU pointer value can be adjusted for testing purposes.
1 Set up the SDH transmit interface and payload required. See "Setting Transmit
Interface " page 60.
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 TU
except TU-3, 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.
OFFSET - You can frequency offset the line rate or the VC/TU rate, relative to
each other, thus producing pointer movements. If you offset the AU pointer, an
87:3 sequence of pointer movements is generated. The available configurations
are listed in the following table.
If you are currently adding Frequency Offset to the SDH interface or payload,
pointer OFFSET is not available
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