[time-nuts] Cable length calibration

[Gary E. Miller]

Yo Hal!

On Wed, 29 Jun 2016 12:28:50 -0700
Hal Murray <hmurray at megapathdsl.net> wrote:

> brooke at pacific.net said:
> > At one point they were looking into making a GPS time receiver
> > where the cable length calibration would be built-in.   
> 
> How would you do that?

TDR.  The GPS already sends a voltage down the cable to power the
antenna.  Send a sharp down the cable and see when the reflection comes
back.

Even some of my cheap managed ethernet switches can do that.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588
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