[time-nuts] GPS active antenna delay ?

[Attila Kinali]

On Tue, 17 Feb 2015 18:33:24 -0800
Tom McDermott <tom.n5eg at gmail.com> wrote:

> Hi Dave - agree that VNA is one good way to measure the delay.  If required
> accuracy is less than about
> 0.5 nsec, then Tx antenna to Rx antenna mutual impedance starts to become
> an issue. Above about
> 1 nsec error probably most of these can be ignored.  No access to a vector
> VNA that works at 1.5 GHz.
> unfortunately.

You could try tinyVNA[1]. I have used it once, it has some quirks
(it's half hobby, half commercial project and that shows) but works
otherwise. I have no idea how accurate it is.

			Attila Kinali


[1] http://miniradiosolutions.com/minivna-tiny


-- 
It is upon moral qualities that a society is ultimately founded. All 
the prosperity and technological sophistication in the world is of no 
use without that foundation.
                 -- Miss Matheson, The Diamond Age, Neil Stephenson