PSN-L Email List Message

Subject: Re: GPS serial connection
From: Richard Gagnon richg_1998@.........
Date: Tue, 20 Apr 2004 08:51:38 -0700 (PDT)


Hi Larry

Thank you for the reminder about the 1pps signal. I had forgotten about it.
What do you think of driving rs232 and the 1pps a distance of about 70 feet?
There are some tall slender oaks trees which partially lean over the house roof
and can partially block satellites at times which is why I want my gps receiver
mounted near the roof peak, just inside the roof vent. It is easily accessed
through a stairway in my garage. Also I am in the northern latitude, actually, 
N 42 degrees  14 minutes  11.628 seconds
W 72 degrees 41 minutes  00.628 seconds
I have a used receiver and used antenna I bought from you a couple of years
ago. I think the antenna lead is about 10 to 12 feet long. Could I do this with
cat 5 or would you recommend twisted pair? I am looking for suggestions. I know
you must be busy so take your time as I work a lot of overtime so I am not in a
rush. Thank you.

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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