GBS Elektronik MCA166-USB User Manual

Page 59

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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

59

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