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| From: | Marcus Leech |
| Subject: | Re: [Discuss-gnuradio] DBSRX Noise Figure |
| Date: | Wed, 30 Nov 2005 09:55:55 -0500 |
| User-agent: | Mozilla Thunderbird 1.0 (X11/20041206) |
Matt Ettus wrote:
Which is great if you have a short cable run between the DBSRX and the signal source. However, for any applications where noise-figure really matters, the only place you can reasonably put the LNA is right at the feed. This is how EME, meteor, and UHF weak-signal guys in ham radio do it, and also how radio astronomers do it. Any loss in front of the LNA will degrade the noise figure dramatically.The DBSRX board has an LNA on the input. Matt
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