At 12:35 PM 2/9/2008, you wrote: >Miura, > >I have a few questions. 1) how do you establish and maintain quadrature >offset in phase between the two DDS chips? 2) are you aware that the "square >wave" outputs have a much higher phase jitter than you would get by using a >compatitor on the sine or triangluar outputs? > >Cash Olsen KD5SSJ
Some of the AD chips but not all have that ability to synchronize with a second chip, but they must be wired for it and be on the same board . The comparator built in is not as good as one could get on the outside of the chip. Some have tried using the sign bit but that has a lot of jitter. Cecil K5NWA www.softrockradio.org www.qrpradio.com "Blessed are the cracked, for they shall let in the light."
