Ulrich, I'm on the run right now, but I've done measurements of the HP 5087, TADD-1, Spectracom 8140-series line amp, and a new protoype ULN buffer amp. I'll post the links later today.
John On Mar 14, 2013, at 6:59 AM, "Ulrich Bangert" <df...@ulrich-bangert.de> wrote: > Gentlemen, > > although it has been discussed here by Bruce et al how the noise floor of > integrated distribution amplifiers designs may compare to discrete designs I > have never seen a *real* phase noise measurement of a *real* amplifier here. > > My own measurements on a DIY AD8007 based distribution amplifier indicate a > noise floor of abt. -160 dBc @ 100 kHz which may not meet the specs of the > absolutely top line of oscillators by some 15 dB but is well in reach of > Bruce's predictions for integrated designs. > > Did any of you Timepod owners make measurements of your own on amplifier > noise? Please note that I am not only out for the noise floor specs. Instead > I am specially interested in specs for power supply induced spurs. > > I just received an article covering ultra low noise oscillators to be found > here: > > http://www.crystek.com/documents/appnotes/ImpactUltralow.pdf > > Clearly the phase noise diagram shows a power induced spur @ -100 dBc. Is > this the measure for the amplifier to take care for? I.e. if the amplifiers > has spurs down -120 dBc, is that good enough? > > Or to put it another way: What is the best phase noise that we can expect > from an amplifier concerned power supply induced spurs? Can it be that the > spurs to be seen are not a problem of the amplifier itself but are inherent > to the measurement setup? If so, is there a recommended setup to minimize > such problems? > > Thanks in advance for your suggestions. I appreciate the expertise in this > group a lot! > > Ulrich Bangert > www.ulrich-bangert.de > Ortholzer Weg 1 > 27243 Gross Ippener > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
