On 4/18/07, Alan B. Pearce wrote: > > I would ask you if I can derive the CLKO signal from PIC to clock my DDS. > > I would guess that depends on the clock jitter you are prepared to have on > he DDS. I would have thought you need a pretty stable oscillator for that, > and the PIC oscillator may not be stable enough. Clock jitter translated to clock phase noise is very important for DDS. If you are expecting smaller SFDR than -40...-45dB (the value you'll get without Cauer filters at the DDS output) then Alan's suggestion is very valuable. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist