EXFO FTB-1, Руководство пользователя

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Test Functions
478
FTB-700G/800 Series
Packet Capture

Trigger Position selects the triggered frame position within the buffer.

Post-Trigger
for a trigger frame located at the beginning of the
buffer. The buffer will contain the triggered frame with the
following frames.

Mid-Trigger for a trigger frame located at the middle of the buffer.
The buffer will contain the triggered frame with the preceding and
following frames.

Pre-Trigger
for a trigger frame located at the end of the buffer. The
buffer will contain the triggered frame with the preceding frames.
Status and Controls

Capture Status indicates the status of the data capture:
“--”: The capture is not started and has not run yet.
Armed ...: The capture is started but waiting for the trigger event.
Capturing
...: The capture is in progress. For Post-Trigger and
Mid-Trigger mode, the trigger event has been captured and the buffer is
filling up.
Completed : The capture is completed.

Frame Count
indicates the number of frames captured that matches
the selected filter criteria. However, for Mid-trigger and Pre-Trigger, the
frame counter will only be available when the capture is completed.

Buffer Usage indicates the percentage of the buffer capacity used.

Triggered Error
is available when trigger on error is selected and
indicates the error that activated the trigger.