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MCA166-USB
APPENDIX 4 - Description of the MCA166-USB firmware functions
MCA Reset Command:
Command name
CMD_INIT
Description
All MCA Parameters will be reset to their initial state and the spectra are cleared. The measurement
is aborted, but the states of the preamplifier power and the value of the high voltage are unchanged!
Command syntax
Format integer integer integer long integer
Parameter preamble command 0 0 end flag
Byte String (HEX) A5 5A 41 00 00 00 00 00 00 00 B9 9B
Used setup value None
Affected setup value All
MCA state STATE_READY
MCA Acquire Commands:
Command name
CMD_START
Description
Depending on the value of the first parameter(cf) the command clears the spectrum and the time or
not and then the measurement will be started. If the first parameter is not equal zero, the spectrum
and the time where cleared and the second parameter(st) is stored as start time.
39
Command syntax
Format integer integer integer long integer
Parameter preamble command cf st end flag
Byte String (HEX) A5 5A 42 00 cf 00 st
l
.. .. st
h
B9 9B
Used setup value All
Affected setup value start time
MCA state STATE_RUN
Command name
CMD_STOP
Description The measurement is stopped immediately. There is no synchronisation with the internal clock or
dwell time.
Command syntax
Format integer integer integer long integer
Parameter preamble command 0 0 end flag
Byte String (HEX) A5 5A 43 00 00 00 00 00 00 00 B9 9B
Used setup value None
Affected setup value None
MCA state STATE_STOP
39 See Appendix 3
58