Matt Ettus wrote:

The DBSRX board has an LNA on the input.

Matt
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.



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