Hi What is the Time Nut goal here? Are we after the carrier frequency or after the modulation on the signal?
Bob > On Dec 23, 2017, at 10:46 AM, Stephan Sandenbergh <[email protected]> > wrote: > > Oops, I noted a sign error in the previous diagram. The attached seems > better... > > On Sat, Dec 23, 2017 at 4:46 PM Stephan Sandenbergh <[email protected]> > wrote: > >> Hi All, >> >> Consider the following very common scenario: A perfect RF signal is >> heterodyne down-converted to baseband using an offset oscillator. Let's >> assume this oscillator has x(t) = xo + yot. This produces a time and >> frequency offset baseband signal. Then, this baseband signal is coherently >> ADC sampled using that same offset oscillator. >> >> What would the effect of this coherent ADC sampling be? >> >> See attached diagram. Here I assumed the ADC timebase is a time-dependent >> function of the oscillator offset. However, it feels like I'm making a >> logic error? I can't remember ever seeing anyone accounting for the ADC >> time-base errors in coherent heterodyne down-converter stages. I have >> limited experience though. >> >> Regards, >> >> Stephan. >> >> >> > <img1.png>_______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
