How to modify a grc file, which is used by the Digitizer Class

1. You need to make sure that the correct set of blocks is loaded
   • Check which version which is used (currently, Dec.2019, alpha8 is used everywhere)
   • Modify you ~/.gnuradio/config.conf in order to load the correct blockset. Here a manual.
   • start the gnuradio-companion and check its output .. is the correct path used ?
2. Locate the *.grc file to modify on the asl cluster
   • Go into /common/export/fesa/local/<FEC>/DigitizerDU2/ ("cdf" <FEC> when /common/usr/cscofe/scripts/accdefs is sourced)
   • Check "grcPath" DigitizerDU2.instance to see which grf file is loaded by the class
   • backup that grc file
   • open the file in gnuradio-companion
3. Permissions
   • Per default, you only can write the file when you are member of the group "FESA", best request membership by IN
   • If not possible, ask me to set chmod a+w for the file
   • Or just send me the modified file, and I will put it there
4. Debugging
   • When modifications of the grc file are done, you need to first start the FESA binary "by hand" , in order to see if it still runs fine.
   • Go to the FEC (use "sss" <FEC> if /common/usr/cscofe/scripts/accdefs is sourced)
   • killall daemon DigitizerDU2
   • Go to /opt/fesa/nfs/local/<FEC> ("cdf" if you connected via sss)
   • cd DigitizerDU2
   • ./startManually_DigitizerDU2_M.sh (you may want to mofify the script in order to use the prod nameserver instead of the dev nameserver)
   • Try to make sense of possible error / log messages, further modify *.grc and repeat
   • Check "top" to check if the CPU load is fine
   • Once you think your setup is fine, you can restart the class as daemon:
   • Go to /opt/nfsinit/<FEC> ("cdi" if you connected via sss)
   • ./50_fesa