[time-nuts] I wish to shorten GPS antenna cable - should I let receiver find the position again?

Tim Shoppa tshoppa at gmail.com
Thu Apr 23 14:11:51 EDT 2015

I agree, used only for frequency reference you won't know the difference.
Still, to join the rank of true time (not just frequency) nuts, you can
configure the antenna cable delay!

Many (all?) of the HP GPS-based smartclock units use the command
:GPSYSTEM:REFERENCE:ADELAY to compensate for the antenna length delay.
After changing cable length, configure it as shown on page 1-22 of

Tim N3QE

On Thu, Apr 23, 2015 at 8:03 AM, Dr. David Kirkby (Kirkby Microwave Ltd) <
drkirkby at kirkbymicrowave.co.uk> wrote:

> I have an HP 58503A which I am using as a frequency source only - not
> to tell the time. I want to shorted the antenna cable a bit, but are
> wondering if I should let the GPS receiver finds it position again. Or
> either of the following better
> * Remove antenna cable, put a new N plug on, and screw it back in with
> the receiver kept powered up all the time.
> * Power off GPS receiver and power it back on with the cable connected.
> I'm not moving the antenna, so the actual position will not change,
> but of course the signals will get to the receiver a bit sooner.
> Dave, G8WRB
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