On 25 Aug 2007 at 13:53, i2phd 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 > I think you are confusing the AD9954 with the AD9854. The 9854 has I and Q outputs with a 12 Bit A/D. The AD9954 has a single output (lots of options for memory, ramping, etc) and has a 14 Bit A/D. Less spurs than the 9854, but more than the 9912.
Dave - WB6DHW <http://wb6dhw.com>
