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MCA166-USB
A3.2 Command set
MCA Reset Command:
Name MMCA_RESET
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 voltages
are unchanged!
Parameter -
Results -
Return Code ERROR_OK = 0 (command accepted successfully)
ERROR_INTERFACE = 1 (communication port not initialised)
ERROR_INVALID_COMMAND = 2 (command not yet implemented)
ERROR_COMMUNICATION = 3 (serial communication error, off line)
ERROR_INVALID_PARAMETER = 4 (parameter out of range)
MCA Acquire Commands:
Name MMCA_START_ACQUIRE
Description The acquisition is started or continued with the actual parameter (mode, resolution, ...)
1. Parameter Clear flag
Repeat mode flag
Trigger flags
integer value 0 leaves spectrum and times unchanged
the start time is ignored
1 spectrum and time are cleared
2 Repeat Mode 1
10
(MCA/MCS)
3 Repeat Mode 2
11
(MCA)
4 Repeat Mode 3
12
(MCA)
5 Repeat Mode 4
13
(MCS)
Bit 14 Trigger: 1=on / 0=off
Bit 13 Trigger signal edge: 1=pos / 0=neg
[2. Parameter] Start time long value
if the 1. Parameter ≠ 0, then the value is stored in
status field (start_time)
Results -
Return Code see MMCA_RESET command
Name MMCA_STOP_ACQUIRE
Description The acquisition is stopped
Parameter -
Results The mca_state is set to STATE_STOP
Return Code see MMCA_RESET command
10 Measurement will be stopped if buffer overrun. In MCS mode a differential amplitude spectrum per sweep is collected.
11 Measurement will be resumed, after the buffer is read out.
12 Buffers will be overwritten, even if not read out.
13 MCS Repeat Mode with one integral amplitude spectrum for all MCS sweeps.
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