On Tue, Aug 28, 2007 at 11:02:25PM +0200, Dominik Auras wrote: > Hi! > > Am I right to state that the fpga firmware is configured as followed: > > Tx chain (0 to 2 possible) > - NCO fine+coarse on Analog Devices Chip > - low-pass 4x interpolation on AD-Chip > - CIC interpolation filters, separate for I- and Q-Data > > Especially: > Cordic turned off, internal DUC (duc.v) turned off?
Correct. > And RX Chain (0 to 4 possible) > - Cordic for downconversion > - CIC decimator per I- and Q-Stream > - Halfbandfilter, after CIC, per I/Q-Stream The half-band is missing from the 4 DDC version because of resource constraints. > Also: > DDC not used? (I mean, ddc.v) Correct. > Low-pass decimation filter on AD-Chip disabled. Correct. > I wonder if http://gnuradio.org/trac/wiki/UsrpRfxDiagrams is still correct. yes, with the annotations. > Greetings > Dominik Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
