Antenna Amp In line Amplifier

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Craig - 30 Dec 2003 15:56 GMT

I`am using a Magellan GPS 310 connected to a desktop computer, because I`am
developing my own software and
inside a building that is extremly shielded, the GPS dosent start
transmitting data until the satellites are picked up or limited data.
Because of this I`am using a external antenna with a antenna amp or In Line
Amplifier.

With a coax In Line Amplifer there is no place to connect a voltage supply,
I assume that the voltage is fed through the coax, one side of the antenna
amp goes to the antenna the other goes to the receiver.

Normally the voltage supply is fed by the satellite reciever, but I`am
adapting it to be used by a GPS.

My question is, if the voltage supply is fed through the coax would the
negative supply go to the sheilding of the coax and the positive go to the
inner core?

Thanks Robert

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Ken Taylor - 30 Dec 2003 20:37 GMT

> I`am using a Magellan GPS 310 connected to a desktop computer, because I`am
> developing my own software and
[quoted text clipped - 15 lines]
>
> Thanks Robert

Normally, yes, but you need to confirm it with the amp spec's.

By the way, it may be easiest to power the device via a cable-TV splitter
with DC pass on some ports only. I think Hills may have them. Connect the
power supply via a DC pass port, and the GPS receiver via a non-DC pass
port.

Cheers.

Ken

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ZForce - 31 Dec 2003 11:22 GMT

I don't know what software your developing or what data you need. But maybe
you can put the GPS into simulator mode and still extract data from it that
way.

> I`am using a Magellan GPS 310 connected to a desktop computer, because I`am
> developing my own software and
[quoted text clipped - 15 lines]
>
> Thanks Robert

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Electronics Forum / Electronics / December 2003

Antenna Amp In line Amplifier