Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, John Ackermann N8UR writes: > >> There's information about my prototype (and a picture) at >> http://www.febo.com/time-freq/hardware/ICS525/ > > Running at 200MHz, the third harmonic at 600MHz is only > down -11.5dB, while the 5th harmonic at 1GHz is down -20dB. > With a 20MHz output, the 3rd harmonic is -10dB and you have > to get to the 23rd harmonic at 460MHz before you hit -30dB. > > Uhm, this is actually a good thing. The thing is supposed to have > a square-wave output, so all the odd-numbered harmonics have better > be there and have better follow the 1/N amplitude law...
Yeah, I remember now that I was going to update the web page to make it clear that you'd sort of expect lots of odd harmonics from a square wave. I'll try to do that tonight. John _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
