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Re: [Discuss-gnuradio] RFX LNA question

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] RFX LNA question
Date: Thu, 26 Nov 2009 10:40:42 -0800
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On 11/26/2009 05:33 AM, Sylvain Munaut wrote:

I'm working on a RF frontend to put before a RFX900/1800. And when
looking at the schematics, I see that the first stage is a MGA82563
which is specified as having a ~13dB gain (it varies depending on the
frequency but not that much). But in the upper left corner of the same
schematics, there is a note detailing the gains of the different stages
and in there, there is a notation about the LNA having a 22dB gain.
That's quite a difference, so either:

  - The LNA on the board isn't a MGA82563
  - The table is just plain wrong
  - The datasheet from the manufacturer is wrong
  - I missed something ...

Can someone help shed some light on this ?

I'm sorry, just disregard that comment, which is a cut-and-paste error. It was originally on the RFX400 page, where it is correct. You'll also notice that the mixer referenced is the 8348, while the RFX900 has the 8347.


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