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List:       gnuradio-discuss
Subject:    Re: [Discuss-gnuradio] Re: USRP / DBSRX calibration
From:       John Ewan <jewan () its ! bldrdoc ! gov>
Date:       2008-05-08 20:20:53
Message-ID: 20080508202053.A4E4D3AAF05 () hermes ! its ! bldrdoc ! gov
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Staffan,

I am not sure how to post to the list, but..........
I came up with a noise temperature of 2291. 5 degrees K.
This would not make for a good front-end type receiver,
but could work as a back-end.

John


------ Original Message ------
From: Staffan Josefsson <lists@ruby-forum.com>
Date: Thursday, May 8th, 2008 6:20 AM MDT
To: discuss-gnuradio@gnu.org
Subject: [Discuss-gnuradio] Re: USRP / DBSRX calibration

Hi.

I'm trying to estimate the noise temperature in the DBSRX and USRP as a 
part of a student project where we compare the USRP as an alternative 
for the receiver in a radio telescope. I tried to convert the -165dBm/Hz 
to Kelven but I'm not getting a sane value. I may be way out here but 
would be very pleased to find out what the noise temperature might be, 
in Kelvin.

Thanks
Staffan Josefsson
-- 
Posted via http://www.ruby-forum.com/.


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