Actually the same TG is able to be both, don't ask me how I don't totally know, but on SHP AIR TG 52127 the same TG is used as CH 1 and CH 2, with 1 being clear and 2 being encrypted.
That said, do you have the UIDs for those SHP units, if they are 2126xxx that may be used by VIPER thechs, as 52243 to 52248 are all used by Viper Techs usually.
UIDs were 21525xx and 21607xx.