Re: [Discuss-gnuradio] USRP and RFX2400 block diagrams

[Eric Blossom]

On Tue, Aug 29, 2006 at 10:08:47PM -0400, Lee Patton wrote:
> I've taken a shot at coming up with block diagrams for the USRP and
> RFX2400.  The diagram for the USRP is the result of information I've
> gleaned from different messages in the list, data sheets, and block
> diagrams created by other GNU Radio users (specifically, Achilleas
> Anastasopoulos).  The RFX2400 diagram was created from Matt's drawings
> and associated data sheets. 
> 
> The diagrams can be found here:
> http://www.pattoncentral.org/gnuradio/diagram/

Nice diagrams! Thanks!

Here are a couple of tweaks:

The digital down-conversion should show a single complex multiplier
instead of two real multipliers.

Same comment on the digital up-conversion.  We've got "Block D"
enabled in the AD9862, thus it's functioning as a complex multiplier.

> Hopefully this will help clear up questions regarding how the I/Q
> sampling happens. Please let me know if (when) you see something that
> needs fixed.
> 
> Thanks,
>  Lee

Eric