Thank you for your answer Mr. Blossom,
> Please read the USRP FAQ then ask again if you're still not clear.
>
http://gnuradio.org/trac/wiki/UsrpFAQ<http://gnuradio.org/trac/wiki/UsrpFAQ>
> http://gnuradio.org/trac/attachment/wiki/UsrpFAQ/USRP_Documentation.pdf
Sorry, but, I read all FAQ, and i just found the answer of my third question
("And for the other dboards, how tune() works for them?")
> Have you looked at the code that implements tune?
>
> Eric
usrp_stardard.{cc,h}? Yes...
I (think) understood the tune process when I read it.
First, the "tune()" tells to d'board to tune as close as it can. After, with
the result of that operation (maybe, f_db - f_target = f_duc) "tune()"
configure the DUC. Is that right? (Be free to correct me...)
But, the BasicTX doesn't have a PLL, or a VCO or another component to tune
at a frequency...Should FPGA do tune job for the basicTX?
Please, be free to correct my affirmations...
Sorry my poor English (and my ignorance) , thanks all!
Ronaldo
2009/1/13 Eric Blossom <e...@comsec.com>
> 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
>
--
__________________________________
Ronaldo A. Viera Nunez
Acadêmico/Engenharia Elétrica
Universidade Federal de Santa Maria
Santa Maria - RS - Brasil
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