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4. FIRMWARE COMMANDS AND RESPONSES
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SET_MDA_COEF a,b,c
Sets the coefficients in the MDA preset calculation to the specified values. A, b, and c are
floating-point values. The MDA preset checks for the following condition to be met:
The calculation is performed once every 30 seconds with i starting at 0 and advancing
through each of up to 20 unique MDA presets. i only advances once the preset has been
met. Note that a, b, and c are the same for each of the unique presets. Only the ROI range
and the MDA preset change when i advances. Once i reaches 20 or MDAPreset
i
equals 0,
the acquisition terminates.
SET_MDA_PRESET MDAPreset,[PeakNumber]
Sets the MDAPreset PeakNumber value as shown in the equation in the SET_MDA_COEF
description above. MDAPreset is usually the product of the desired MDA, the yield and the
efficiency. PeakNumber is a parameter that specifies which of up to 20 (0–19) MDA presets
to change. If PeakNumber is omitted in the set command, all MDA preset values will be set
to 0 (disabled), and the supplied value will be applied to MDA Preset 0. This provides
compatibility software that only supports the one-nuclide MDA method implemented in
some MCBs.
SET_MODE_PHA
Sets the mode to PHA.
SET_OUTPUT [port, value]
This sends the value to the port. This command can be issued without entries for port and
value because the EASY-MCA has only one port. If you wish to specify a port number, it
must be zero for this unit. See also SHOW_OUTPUT. See also STEP_OUTPUT.
SET_PEAK_PRESET count
Sets the ROI peak preset to the specified count. During data acquisition when the contents
of any channel of a device that has the ROI flag set reaches the peak preset count, the preset
is complete and the acquisition is stopped. The actual number of counts in the ROI peak
may exceed the preset value by a small number of counts due to the pipelined architecture of
the EASY-MCA. Setting a peak preset to 0 counts disables the preset. The peak preset may
be set to from 0 (disabled) to 2147483647 counts. See also CLEAR_PRESETS and SHOW_
PEAK_PRESET.
