Programs like soft rock would be better with a crystal front end it seems to me. The computer does the actual tuning. Beside the spur problem a crystal has less phase noise.
k5nwa wrote: > At 08:53 AM 8/25/2007, you wrote: > >>Another source of spurs is the local oscillator of the SDR, if >>implemented with a DDS. Only the very recent DDS like the AD9912 start >>to be acceptable under this point of view. >>Products like the AD9954 (much valued by some because it has I and >>Q outputs) are *terrible*. They produce a forest of spurs, which can >>only partially be taken care of via software tricks. >> >>73 Alberto I2PHD
