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


From: Lee Patton
Subject: Re: [Discuss-gnuradio] USRP and RFX2400 block diagrams
Date: Wed, 30 Aug 2006 13:28:33 -0400

On Wed, 2006-08-30 at 06:56 +0000, Eric Blossom wrote:
> 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!

Glad to.

> Here are a couple of tweaks:
> 
> The digital down-conversion should show a single complex multiplier
> instead of two real multipliers.

Thanks. I'll make the change.  A complex multiplier is just a more
efficient digital version of what I've drawn, right?

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

Okay. Out of curiosity, is "Block B" enabled too?






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