Digital Card calibration constants file names are read from a file in directory /data/calib/dummy (in case socalled 'dummy' constants are used) or /data/calib/vnnnn, named xcal_calib.files, in which nnnn is a 4-character version number and x= f, b or r (for FCAL, BCAL and RCAL respectively).
There is one calibration constants file per crate. The files are in ZEBRA-format.
The version number used is the number on the 26th line of the DAQ configuration file (the line with the comment: calib constants).
If the version number is -1 no calibration constants are downloaded to the Digital Cards.