Hi ,
here the link for ascii string\ instruction for spyder X20

https://www.dropbox.com/s/rjeeju3pls...20Protocol.pdf

i hope it works!
im not so expert with catalyst....
i often control spyder by esa decimal string with coolux WD,
but probably with catalyst is the same......( string are string!!)
if you know Spyder system is very simple

if not , dont esitate to contact me!

cheers
Nicholas