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Re: [Discuss-gnuradio] [USRP-users] SBX Noise

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] [USRP-users] SBX Noise
Date: Tue, 09 Aug 2011 20:24:55 -0400
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110621 Fedora/3.1.11-1.fc14 Thunderbird/3.1.11

On 08/09/2011 02:32 PM, Farrukh Aziz wrote:

I have been working with SBX and WBX dboards for a while now. I have
also experienced more noise with SBX.
A number of people have reported this.  We are investigating and will
get back to you soon.  What motherboard are you seeing this with?


Another salient question, I think, is are noise levels being compared at the same, or nearly the same, frequencies. Broadband LNAs tend to be noisier at higher frequencies than lower ones, and since the SBX have coverage up to 4.4GHz, it's not really "fair" to compare
  noise at let's say 3.4GHz, with noise, at, say, 1.2Ghz.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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