PSN-L Email List Message

Subject: Re: GPS serial connection
From: Richard Gagnon richg_1998@.........
Date: Mon, 19 Apr 2004 10:34:14 -0700 (PDT)


Hello Ian

Thank you for the reinforcement. I have been thinking along that line.

Richard




--- Ian Smith  wrote:
> How far you can run an rs232 cable is dependant on the speed that you 
> need to run the link (amongst others too).  GPS receivers tend to be run 
> at 4800 or 9600 baud.  This is fairly modest so I would be optimistic 
> that it would work over 100 feet, even without an extender.  Worth a try.
> 
> Ian Smith
> 
> apsn wrote:
> 
> > Richard,
> >
> > I have successfully run RS-232C cables of 100 feet in length.  I might 
> > also suggest you
> > consider a RS-232C extender (which uses CAT5 cable between two 
> > converter boxes)
> > such as that offered by Minicom:  http://www.minicom.com/kvm_232.htm
> > There are others available as well:
> > http://www.ramelectronics.net/html/EXT-RS232.htm
> >
> > What others have done is to extend the GPS antenna coax rather than 
> > the RS-232 cable and put the receiver next to the A/D.
> >
> > Hope this helps,
> >
> > Bob
> > http://apsn.awcable.com
> >
> >
> > At 09:05 AM 4/19/2004, you wrote:
> >
> >> Since there is power in my attic, I want to install my GPS receiver 
> >> near the
> >> roof vent at the end of the house and run the cable down to Larry's 
> >> A/D. The
> >> distance is about 100 feet and I think that is too far for RS232. I 
> >> have read
> >> where RS485 is useful for this issue. Any suggestions would be 
> >> appreciated.
> >> Thank you.
> >>
> >> Richard Gagnon
> >>
> >>
> >>
> >>
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