Exfo FTB-800 Series for FTB-1 Bedienungsanleitung PDF herunterladen (Seite 462)

100

101

Test Functions

452 FTB-700G/800 Series

Pointer Adjustment

RX Pointer Adjustment

 Pointer Value

For STS/AU: Displays the value for the pointer, H1 and H2, indicating the

offset in bytes between the pointer and the first byte of the STS-n

(SONET) or AU-n (SDH).

For VT/TU: Displays the value of the pointer, V1 and V2, indicating the

offset in bytes between the pointer and the first byte of the VTn

(SONET) or TU-n (SDH) of the high order path. However, TU-3

considered a low order path, uses the H1, H2, H3 bytes for its location.

 Cumulative Offset indicates the difference between the pointer

increment and the pointer decrement. A pointer jump will reset this

value to 0.

 Ptr. Incr. (Pointer Increment) gives statistics on positive pointer

adjustment detected.

 Ptr. Decr. (Pointer Decrement) gives statistics on negative pointer

adjustment detected.

Periodic pointer adjustment 26-1 pattern Basic sequence

Duration 60 sec

Basic sequence

Duration = 30 sec

Periodic 26-1 with Add Add sequence

Duration = 30 sec

Periodic 26-1 with Cancel Cancel sequence

Duration = 30 sec

a. The basic sequence corresponds to the pointer event pattern defined in the standard without any Add or

extra Cancel event.

b. Only available when the Periodic check box is selected.

Pointer Sequence Pattern Initialization Cool down

1 2 ... 457 458 459 460 461 462 463 464 465 466 467 ... 620 621

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