Great work, John!!! I'm really looking forward to the actual SDR-1000 measurements to see whether the noise multiplication from the on-chip multiplier is according to theory or if there are other factors involved beyond simple scaling.
I haven't had a chance yet, but will also compare your measurements to the ones I took over Xmas using the same Agilent box. 73, John ---- [EMAIL PROTECTED] said the following on 02/04/2006 12:22 PM: > Hello Enthusiasts, > > I've made several phase noise measurements and posted them at > www.exothink.com/SDR. The first page shows plots comparing > different quality oscillators suitable for use in the SDR1000. > The second page contains several measurements at the DDS output. > > These graphs were generated in Excel so that different measurements > could be plotted on the same graph. I also have a couple dozen > virgin instrument screen dumps that I'll add at a later time. > > Several measurements have also been made on the SDR1000 to provide > insight on how the phase noise LO performance relates to real world > receiver performance. I'll let you know when I get these posted.
