Black Box IEEE 1284 Betriebsanweisung PDF herunterladen (Seite 60)

Page 60 of 98 The Black Box Toolkit

8.5. The data analyser (DA)

All software modules stream timing data into Real Time Log (RTL) files. The Data Analyser

allows post-hoc examination of the timing data and allows you to get an overview of events

that occurred on any of the eight lines against a constant time base. Two free moving

cursors let you accurately measure the timing difference between any two points. A

spreadsheet view is also available and aids in exact timing measurement.

Note: The Data Analyser should not be running when you collect data as it pre-allocates a

large amount of memory and is extremely processor intensive when analysing data files.

To load a RTL file click on “File|Open” from the menu bar or use the open file icon from the

toolbar. As the file is loaded and analysed a progress bar will display the loading status.

Note: It is important to note that many millions of samples may need to be analyzed before

the plot and summary statistics can be displayed. The speed at which the data can be

loaded is highly dependent on the number of samples and ultimately the speed of your PC.

However as the Data Analyser is multi-threaded it can be minimized and left to get on with

its job whilst you do something else.

Once all data has been loaded the plot will be drawn and spreadsheet completed.

In the example screen shot above we can see that a stimulus image has been detected on

line 3. We can see that it begins at 1,821ms into the run and ends at 2,196ms and stays

on screen for 375ms. We can also see that an active switch closure response was

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 97 98

Keine Kommentare

Black Box IEEE 1284 Betriebsanweisung Seite 60