[time-nuts] GPS active antenna delay ?

[Jim Lux]

On 2/18/15 1:49 AM, Attila Kinali wrote:

>
> 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
>
>
And tough to find any substantive information on the hardware design.  I 
poked around for a few minutes, but all I was able to find was software 
user manuals, but no hardware description.

I assume that it's the usual 2 port, 1 direction thing.. A DDS for the 
RF source, and some sort of dual channel detector with directional 
couplers or a bridge on the output port.

What would be interesting is to know what detection method they're using..