archiv~1: Re: SETI DSP


David Woolley ( )
Mon, 2 Nov 1998 08:28:50 +0000 (GMT)

[ Didn't understand the subject ]
> I'm thinking of setting up an omnidirectional dipole on the back end of my
> SETI feed horn to try to pick up ambient RF noise. I have seen various
> models of a device that works simialr for short-wave and communications
> receivers.

These can only cancel specific sources - they effectively put a null in the
combined antenna pattern in the direction of the source. I also suspect
that they rely on sky noise dominating receiver noise; they will probably
increase system noise in a SETI system.