Black Box IEEE 1284 Guía de usuario descargar pdf (Pagina 77)

The Black Box Toolkit Page 77 of 98

If we look at the status bar we can see that the toolkit has taken 1,474,120 samples in

30,000ms. This gives a sampling rate of just over 49 samples per millisecond, or 49kHz.

The actual file size was 33.5Mb. This means that Real Time Log files will grow at a rate of

around 1.2Mb every second! Fortunately .rtl files compress greatly with standard archive

utilities such as WinZip.

By right clicking on the graph a pop-up box can be activated. If you then click on

“Measure” two cursors can be activated. These can be used to directly compare timings

between any two points on any of the eight lines.

Both cursors can be dragged and positioned roughly in place with the in-built snap to

sample feature. Generally the green cursor is used to define the leading edge on one line

and the red the trailing edge on another.

Once you have roughly snapped to a sample, exact positioning can be performed by right

clicking and selecting “Zoom In”.

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Black Box IEEE 1284 Guía de usuario Pagina 77