Thank you all for the help.

Richard



--- apsn  wrote:
> Richard,
> 
> You only need 4 satellites for 3-D positioning.  Accurate time can be had 
> by 1-2 satellites if I remember right.
> 
> Bob
> http://apsn.awcable.com
> 
> 
> At 06:17 AM 4/21/2004, you wrote:
> >Hi Larry & group
> >
> >I did not mean cat5 for the antenna, only for rs232 and 1pps.. I guess I was
> >not clear on that. The system works fine and thank you for the follow up 
> >on the
> >satellite reqirements. I thought I would need at least four sattelites.
> >
> >Richard
> >
> >
> >
> >--- Larry Cochrane  wrote:
> > > Richard,
> > >
> > > My A/D board requires three signal lines to/from the GPS receiver. If you
> > > make up a RS232 cable, make sure connect up the 1 pps signal (pin 1) as 
> > well
> > > as the transmitter, receiver and ground lines.
> > >
> > > Larry Cochrane
> > > Redwood City, PSN
> > >
> > > ----- Original Message -----
> > > From: "Richard Gagnon" 
> > > To: 
> > > Sent: Monday, April 19, 2004 10:05 AM
> > > Subject: GPS serial connection
> > >
> > >
> > > > 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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> >
> >
> >
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