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SONET_Usr.bk Page 88 Wednesday, December 13, 2000 11:11 AM
Selecting Test Features - SONET Operation
Adding Pointer Adjustments
T1.105/GR-253 - Provides pointer movements according to T1.105 and GR-253:
4 Choose the T1.105/GR-253 ADJUSTMENT TYPE.
5 Choose the POLARITY, INTERVAL and PATTERN (where applicable) for the
6 Choose POINTER SEQUENCES
T1.105/GR-253 Pointer Sequences Explained
In addition to the BURST, NEW POINTER and OFFSET pointer movements
described, the OmniBER 720 can also generate pointer sequences (pointer
movements) according to T1.105.03 and GR-253.
Before running a pointer sequence you can elect to run an initialization sequence,
followed by a cool down period, and then run the chosen sequence. This is selected
using the START INIT softkey shown in the display on the previous page.
Initialized pointer sequences are made up of three periods: the Initialization Period,
the Cool Down Period, and the Sequence (Measurement) Period, an example is
given in the following figure:
Note: SINGLE (A1), BURST (A2) and PHASE TRANSIENT(A3) are Non Periodic
Sequences.
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Pointer Type
Line Rate
SPE
Constant
SPE
Offset
VT
Constant
VT
Offset
selected sequence.
sequence and
to stop the pointer sequences.
STOP INIT
Non Periodic Sequence
Initialization Sequence
Periodic Sequence
Initialization
SPE Rate
VT Rate
Offset
Tracks STS
Payload
Constant
Constant
Constant
Offset
Tracks Line Rate Constant
to generate the selected
START INIT
No Pointer Activity
Sequence
Continuous Sequence
Cool Down
Measurement
Period
Time
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