Re: [Discuss-gnuradio] RFX LNA question

[Matt Ettus]

On 11/26/2009 05:33 AM, Sylvain Munaut wrote:
> Hi,
>
> 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.

Matt