Re: [Discuss-gnuradio] BasicTX PLL and some TX doubts

[Eric Blossom]

On Tue, Jan 13, 2009 at 05:19:32PM -0200, Ronaldo Nunez wrote:
> Hello community,
> 
> I'm trying to understand how signals are transmitted by the USRP with a
> basicTX.
> I studied a lot about Quadrature Modulation, Single Sideband transmission...
> and I've read all the available documentation about USRP and GNUradio.
> 
> Eric and other guys have helped me, but some doubts persists! :(
> 
> There is a PLL in the BasicTX daughter board?
> How tune() function access that PLL?
> And for the other dboards, how tune() works for them?
> 
> If somebody could help me, i will be thankful for life!

Please read the USRP FAQ then ask again if you're still not clear.

  http://gnuradio.org/trac/wiki/UsrpFAQ
  http://gnuradio.org/trac/attachment/wiki/UsrpFAQ/USRP_Documentation.pdf

Have you looked at the code that implements tune?

Eric