[time-nuts] Effect of the Antenna Delay in setting in Z380!A

[Bob Camp]

Hi

When you change the cabe delay, the X/Y/Z coordinates of the GPS are not impacted in any way. 
The location of the center of the antenna is what is used before and after you make the adjustment. 
If you care about frequency only, the setting does not matter. If you are after the best timing outcome, 
the delay does indeed matter. 

Unless you know the “built in offset” of your particular receiver, anything under 20 ns probably isn’t 
worth messing with. 

Bob

> On Feb 29, 2016, at 4:05 PM, Artek Manuals <Manuals at ArtekManuals.com> wrote:
> 
> One of the commands for the Z38xx series involves setting the Antenna (feedline) delay..
> Am I correct in assuming that the only thing this does is affect the X, Y  & Z coordinate accuracy of the ground station? Time and frequency accuracy are not really a factor when it comes to the ANT:DELAY setting ...correct?
> 
> For those of who might care I would assume that actually taking the coax and measuring the delay at 1.5GHZ would be better than relying on the manufactures published specs for velocity factor.  I was going to set up and measure the delay with a signal generator and  good oscilloscope (I have a 7104 1GHZ scope which still shows decent signal at 1.5 GHZ)
> 
> Dave
> NR1DX
> 
> -- 
> Dave
> Manuals at ArtekManuals.com
> www.ArtekManuals.com
> 
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