Chapter 3 23
Introduction to WinPulse
Start and Stop Specifies the integration gate Start and Stop times (in ms from
the start of each pulse). To maximize the selectivity of the
PFPD for the specified mode, the Start and Stop times should
be set to incorporate as much of the emission time domain of
the selected mode as possible, and minimize overlap with the
emission time domain of other modes detectable with the
optical filter used.
<op> Sets an algebraic operator (-, +, x, or /) for the Alpha scaling
factor.
Alpha Specifies the scaling factor to be used for dual gate technique,
which is activated when alpha has a nonzero value. Appendix
B describes how to use the dual gate capacity and how to
determine appropriate Alpha values.
Enable Sqrt Activates calculation of the square root of the output signal.
This is used to linearize quadratic response signals associated
with some elements (e.g. sulfur mode, S).
The output signal for a specified mode is a function of the selected operator
(<op>), the specified value of the Alpha scaling factor, and the integration results
for gates A and B (which are determined by the specified start and stop times). It is
calculated as follows:
Output signal (mode) = A <op> Alpha x B
Note: If Alpha is zero, then the output signal is the gate A signal only.
The function of each button along the right side of the Gate Parameters screen is
as follows:
OK Transmits the current gate parameters to the Detector Controller
and exits the Gate Parameters screen.
Cancel Disables all changes made to the current gate parameters and exits
the screen without downloading changes to the Detector Controller.
Help Activates the Help screen.
Add Appends a new mode with the specified gate parameters to the
Gate Parameters List.
Change Modifies the current gate parameter without appending a new
mode to the Gate Parameters List.
Delete Deletes the selected gate parameters.
To permanently save gate changes, the Save PFPD Parameters to EEPROM
must be activated (see “Commands Menu”). To exit the Gate Parameters screen,
click on Cancel.
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