Thanks Brian!
> Because each local oscillator is not exactly 64.000000000MHz, when > that signal is multiplied up by the PLL - so does the "offset". I see on "USRP under 1.5x magnifaying lens, by: Firras" that the tranceiver osillators tune as close as possible to the desired receiving frequency in steps of 4MHz,and the remaining frequency offset is downconverted by the USRP DDC. So if I am tuning to 2.40GHz(multiple of 4MHz), why a frequency offset occurs? or could you discribe how the desired RF signal at 2.40GHz ends up at around 12KHz for XCVR2450 tranceiver particularly? > The fortunate part for you is that it is very well documented and > written about extensively. Take a look in your favorite wireless > communications systems book and you will most likely see a good > discussion with regards to time synchronization. Do you think this frequency offset remains exactly the same every time for the same USRP at a constant target frequency(ex. 2.40GHz)? Or is it time varing? Also is there some way(GNU Radio code that uses PLL and the frequency offset) to demodulate the signal at this offset frequency back to baseband? Bruhtesfa -- Posted via http://www.ruby-forum.com/. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
