[TenTec] Orion - The Kachina Design Theory

[Jim Reid]

> In many respects, the Kachina 505DSP was an excellent 
> lab experiment for Doug Smith in the design and implementation 
> of sophisticated transceivers.

I wonder if Doug Smith wrote the following very good explanation
of the Kachina DSP rcvr design theory?  Very well done,  and
I am getting close to "knowing" something about DSP rcvr's,  but still
quite a ways to go,  hi.  Have a look at:

http://www.kachina-az.com/theory1.htm

Guess I "know"  what a roofing filter does,  explained in the link,
but why is it called a "roofing" filter?

73,  Jim  KH7M