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Re: [Discuss-gnuradio] A longish-term drift study of the USRP/DBS_RX com

From: Chuck Swiger
Subject: Re: [Discuss-gnuradio] A longish-term drift study of the USRP/DBS_RX combination
Date: Wed, 11 Jan 2006 07:56:31 -0500

At 08:39 AM 1/10/2006 -0500, you wrote:
Attached, y'all will find a plot of the total power detected with my receiving setup:

    21cm feedhorn--->LNA->DBS_RX->USRP

This is with the feedhorn covered with aluminum foil.

The 40-minute cycle is something that appeared in my other receiver a couple of years ago, so I suspect
 it may be due to the heat cycling in the house.

Very interesting - of course the Y scale is a really mangified range of only 0.04, which may or may not be significant. There's always batteries for ultimate isolation - I run the USRP off a 7ah 6v sealed lead/acid battery. Also you could make your setup portable and take it out away from civilization. Believe me, there's nothing like explaining shortwave or RA antennas to a park ranger
an hour after dusk, who just stopped by to check up on you. ;))


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