[time-nuts] XL-DC Antenna Requirements

Bob Martin k6rtm at comcast.net
Tue Jul 17 01:02:49 UTC 2012


Chris--

The 58532A is somewhat higher gain (30dBi or better) than most mag-mount antennas (26dBi typ IIRC).  The pointy nature of the 58532A also serves as an avian deterrent, reducing the accumulation of attenuating deposits...

Running two receivers, I would highly recommend a real GPS distribution amp such as the 58535A.  Such a beast will let you run both receivers from one antenna, while providing isolation between the receivers.  I just happen to have one handy, having recently pulled it out of service and replaced it with a 4-port model to better support my time-nuttiness.  Contact me off list if you would be interested.

73 Bob k6rtm at arrl.net


On Jul 16, 2012, at 16:01, time-nuts-request at febo.com wrote:

> Message: 1
> Date: Mon, 16 Jul 2012 14:59:52 -0700
> From: Chris Hoffman <cq.kg6o at gmail.com>
> To: time-nuts at febo.com
> Subject: [time-nuts] XL-DC Antenna Requirements
> Message-ID: <0208B173-9F7B-49B9-AE83-EE231EBBA18E at gmail.com>
> Content-Type: text/plain;	charset=us-ascii
> 
> All,
> 
> Though somewhat outmoded, looking forward to starting my own time shop with two XL-DC controllers that I have been lucky enough to pick up recently. 
> 
> My question: Do I really need to invest in the likes of the HP 58532A antennae, or will my surplus Trimble magnetic antennae -- magnetically attached to a random ferrous backplane -- do? 
> 
> I guess what I am really asking: what are the relevant antenna design requirements here, and does the advent of as 32-satellite-constellation have any effect upon the antenna choice (i.e. design downgrade) for the TrueTime XL-DC? 
> 
> -CH
> 
> Chris Hoffman
> cq.kg6o at gmail.com
> http://ar.ctur.us



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