Stereo Scan 440 - DCU

Appendix E Options £..63
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the drop down box. Each trace is displayed in a different colour, as shown by the
colour of the current trace selection radio buttons.
Current Trace for Control
The trace offset and scaling functions operate on the current control trace. This
b'ace is indicated by selecting one of the four radio buttons on the left of the
window.
FUter Value
The current filter value used for all displayed traces may be set using the scroll
bar at the top right of the window. This may be done at any time and is non
destructive of the acquired data.
The filter value. which is in the range I through 16. is the number of adjacent
pixel values which are ~rged to provide the ~ of the pixel. i.e. with a filter
value of 8 the pixel value displayed is the ~ of the pixel at a position and the
8 pixels preceding it and 8 pixels following it.
Trace Source Selection
The drop down box associated with each tr8':e may be set to any of the 7 energy
windows acquired. Each window is identified by the user defined identifier (see
Xray Dot map description).
Auto Scaling
When data acquisition is started each trace defaults to Auto scaling mode.
~
Full
In this mode a trace has it's data scaled for display such that the maximum value
in the line will give a full scale excursion of the trace.
scale for the trace is 256 pixels with yScaU = J,
If Scale Max. has been in use auto scaling may be reselected using the check box.
Scale to Trace Point
For the current trace this scaling mode may re selected using the radio button
on the right larelled Scale Max.
In this mode a blue line is displayed in the profile window which selects an X
position on the trace. The pixel value at this position is used to define the full
scale excursion of the trace, hence pixels with greater values will be truncated at
Stereoscan 440 Operator Manual