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Cellular forums Home > Archive > Garmin GPS > May 2005 > ANT help
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| i need to use my garmin 5 where i'll have to mount a remote antenna
about 150ft away,
how is that typically done, i presume that if i just buy a small mobile
antenna and extend the coax w/say lmr400 it would be too lossey dunno
is ththere some other form of antenna or preamp used in these
situations?
thanks
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| In article <m-CBC556.21481726052005@news.verizon.net>, ml <m@di.net>
wrote:
quote:
> i need to use my garmin 5 where i'll have to mount a remote antenna
> about 150ft away,
>
> how is that typically done, i presume that if i just buy a small mobile
> antenna and extend the coax w/say lmr400 it would be too lossey dunno
>
> is ththere some other form of antenna or preamp used in these
> situations?
>
>
> thanks
Well one could try using one of the Sat Tv inline amps which would
cover the frequency, but the power on the center conductor may be a
problem since the Garmin uses 5VDc I think, and the inline amps are in
the 13VDc/18VDc range. I am wondering why one would need the antenna
to be 150 Ft away from the receiver? Why not just put the Garmin5
at the antenna site and remote the serial output @NEMA0183 to the rest
of the stuff over some CAT5 wire. RS422/RS485 should do that without
blinking and eye, but that is just "Me"
Me
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| In article <Me-DB4BF0. 13483827052005@netne
ws.worldnet.att.net>,
Me <Me@shadow.orgs> wrote:
quote:
> In article <m-CBC556.21481726052005@news.verizon.net>, ml <m@di.net>
> wrote:
>
>
> Well one could try using one of the Sat Tv inline amps which would
> cover the frequency, but the power on the center conductor may be a
> problem since the Garmin uses 5VDc I think, and the inline amps are in
> the 13VDc/18VDc range. I am wondering why one would need the antenna
> to be 150 Ft away from the receiver? Why not just put the Garmin5
> at the antenna site and remote the serial output @NEMA0183 to the rest
> of the stuff over some CAT5 wire. RS422/RS485 should do that without
> blinking and eye, but that is just "Me"
>
> Me
thank you very much for the tips i appreciate it
never woulda thought of a sat tv amp guess if ti's wide enough it should
work, i prob can snag one cheeper than a purpose built sat one
i am sure i can use a tv voltage filter they sell to keep the dc out
of my garmin
thanks for that tip
i'd love to put the GV oon the roof but i am sure that it's not that
weather resistant and i'd also guess i'd be stolen
also ia m pretty sure that the serial output wouldn't travel 150f (cert
no via cat 5) possibly on low cap shielded serial cable or w/a booster,
but it's moot can't leave it on the roof
while i was up there i got 10sat w/waas and it said 8ft not bad
wonder if the direct tv dish would pick up a gps bird? it's pointed
pretty low
perhaps i can get a cheeep gps outdoor/mobile mounted rig that then i
can just run a serial cable with a booster
cool thanks
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| Stan Gosnell 2005-05-29, 6:55 am |
| ml <m@di.net> wrote in news:m-9C369A.19432128052005@news.verizon.net:
quote:
> wonder if the direct tv dish would pick up a gps bird? it's pointed
> pretty low
No. The GPS satellites are not in geosynchronous orbit. You have to be
able to receive at least 4, at very different places in the sky. A dish
antenna won't do that.
--
Regards,
Stan
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." B. Franklin
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