Selecting Test Features

 

 

Adding Pointer Adjustments

 

 

The following conditions apply for pointer sequence generation:

NOTE

 

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

 

 

No Pointer

Start of Next

 

Adjustment

87-3 Pattern

 

Pointer Adjustment

 

87

3

 

An Example of a Pointer Sequence

Pointer Sequence

Description

 

 

T1.105 A1 SINGLE

Periodic Single adjustments, all of the same polarity which is

GR-253 5-29

selectable. Separation between pointer adjustments is fixed at

 

approximately 30 seconds.

 

 

T1.105 A2 BURST OF 3

Periodic bursts of 3 adjustments, all of the same polarity which is

GR-253 5-30

selectable. The interval between bursts is fixed at approximately 30

 

seconds. The interval between adjustments within a burst is set to

 

the minimum.

 

 

57

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HP BER 718 37718A manual Approximately 30 seconds, Minimum