On 7 Feb 2015 19:18, "Tom McDermott" <[email protected]> wrote:
> Has anyone on the list measured or otherwise estimated the active antenna > delay including the amp and filters? > > -- Tom, N5EG I have never done this, but suspect that using a VNA is the best way to go. With a simple passive dipole on one port, and the active antenna and cable on the second port, a transmission measurement (S21) is probably the way to go. But I was unsure of exactly how to do it. Your question prompted me to ask on the Keysight VNA forum. There's a reply by Dr. Joel Dunsmore - one of the worlds leading authorities on VNAs. http://www.keysight.com/owc_discussions/thread.jspa?threadID=39151&tstart=0 He asks what accuracy is needed. Being time-nuts, I think the answer is "as high as possible". He writes "With this method, 1 nsec is reasonable, but if you need 100 psec or 10 psec, then we will have to be much more careful." You might want to contribute to that forum post. Dave. _______________________________________________ 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.
