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6.4 Extractor Box Function
The Extractor Box is a cursor used to determine an area of data for the extraction of
Top and End views from an L-scan or an S-scan view. This is very useful to limit the
area of an acquisition to be included in a new view, allowing the user to cut out any
noise or data outside the area of interest. It limits the range of the view to give a
faster rendering that otherwise would require browsing through a lot of data.
The use of the Extractor Box for the Veo and Prisma instruments is explained in their
respective user manual.
6.5 Extracting C-scans from Gates
The C-scan is a view generated from a 0-degree linear scan. It can be described as a
two dimensional graphical representation displaying the gate information obtained
relating to signal features in a top, plan view of the part under test. The specificity of
the C-scan is that gates are used to extract information from the A-scan (for example
the amplitude of a specific echo).
To extract a C-scan:
1 On the test instrument, press the MENU key.
2 On the View menu, select the view content (amplitude or depth).
3 In the A-scan view, select the gate from which the C-scan will be extracted.
The extraction comes from the L-scan data which reflects the gate selected in the A-
scan view.
4 Select if the measurements will be relative to the interface or to other gates.
For example, the sound path between G1 and G2 (G being the gate number).
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