HP OMNIBER 718 HP 37718A - Manual (Page 67)

57
Selecting Test Features
Adding Pointer Adjustments
N OT E The following conditions apply for pointer sequence generation:
The sequences can only be applied to the SPE pointer when the SPE does
not contain a VT structure, otherwise it is applied to the VT pointer.
Pointer sequence generation is not available when a frequency offset is
being applied to the Line Rate.
The following figure gives an example of a T1.105/GR-253, 87-3 Pointer
Sequence.
T1.105 A4 and A5, 87-3 Pattern
An Example of a Pointer Sequence
Pointer Adjustment
87
No Pointer
Adjustment Start of Next
87-3 Pattern
3
Pointer Sequence Description
T1.105 A1 SINGLE
GR-253 5-29 Periodic Single adjustments, all of the same polarity which is
selectable. Separation between pointer adjustments is fixed at
approximately 30 seconds.
T1.105 A2 BURST OF 3
GR-253 5-30 Periodic bursts of 3 adjustments, all of the same polarity which is
selectable. The interval between bursts is fixed at approximately 30
seconds. The interval between adjustments within a burst is set to
the minimum.