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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 suspectit 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. ;)) --Chuck
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