$ online -mca
launches a MCA widget. The purpose of this applications is to check the operational status of the MCA, look at count rates, adjust ROIs.
Related error: The MCA feature required some changes in Spectra and also in ./Persistent_spectra.pl. This file is automatically created by Spectra in the process working directory, if it does not exist. The following error may occur, e.g.:
open 'mca' No such file or directory at /home/pXXuser/temp/Persistent_Spectra.pl line 60.
User action: delete Persistent_spectra.pl and restart 'online -mca'.