From FELIX Laboratory wiki
High Power RF
Documentatie RF switches
Spare flexible couplings / Reserve flexibele koppelingen liggen in "het koffertje van Lex".
Some abandend page FELIX HPRF
Low Level RF
The signal generator creates a 1 GHz (999.430 MHz) wave for the gun, which is tripled to 2998.29 MHz for the LINACs.