Dan is correct in that the 8ce EM+ unit does not incorporate a carrier frequency and it is also true that the unit does not need one.
The plasma field generated from the double bubble tubes is similar to a pulsed magnetic field in that the field penetrates 100% without the need for a carrier frequency.
Crane/pad devices, because they output dc electricity do require a carrier frequency to penetrate below skin debth though there is no garrantee that the "juice" will affect deep tissue organs. Though I hope it does.
I will say that the 8 or 9ce EM systems are not for everyone, these systems are for researchers who refuse to trust some manufacture to do their thinking for them! As is promoted by the maker of the Plasma Plus II on their webpage:
"The Plasma Plus II does all the thinking for you."
Thats the same song the medical profession sings. Thats the same song Preachers sing, thats the same song Politicians sing.....everybody knows whats best for you but you.
I realize many people do not have the desire to delve as deeply into frequency research and application as I do and it is indeed a Good thing that the mfg's. do. There are many other units out there that are excellent for normal people.
Though I have incorporated the use of Atler Robin's F-125 frequency generator to supply frequencies to the "8" I could have used Ken Uzalls, Frex 16 software and saved a lot of money.Or I could have used the GB4000 as a frequency generator without breaking any known laws.
The choices facing people getting into this field are daunting and am I glad I'm not one of them.
Best wishes
randall