Hi,
Is the reason why Docs for the ELONICS E4000 are not published because it is Chinese?
The E4K is from a UK company AFAIK, not chinese. It's only available under Non-Disclosure-Agreement, they don't just give it out. (I tried :)
I'm not sure exactly what terms the RTL datasheet are available under, but in any case it's a copyrighted document.
Cheers,
Sylvain