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Re: Trailer brake controller [message #351503 is a reply to message #351486]

Tue, 21 January 2020 15:52

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma:

Senior Member

Johnny,
Having a licensed channel doesn't give you a whole lot of protection against interference. I did a lot of Fire Department systems which you would think would have some upper hand on protection from interference. I had a licenced 900Mhz link go down about a week after it went up. Finally called in the riggers to go up and check the antenna. They radioed down that there was a 900Mhz unlicenced stick now mounted about 3 feet in front of our 900Mhz licensed dish. It was on a municipal water tower so you could not see it from the ground. I told then to removed it.

Two days later the ISP notified the Municipality and they were livid. They were more worried about the ISP than their Fire Department Dispatch... let alone the unlicensed Part 15 no interference clause.

The ISP guy had no idea that sticking an antenna in front of another antenna could cause interference on a different frequency.

That scenario happened many times, usually late on a Friday afternoon.

Unlicensed stuff is built cheap and any close by transmitter, say a Taxi, could potentially swamp your signal.

Just saying

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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[Message index]

		Trailer brake controller By: thigh19 on Mon, 20 January 2020 21:18
		Re: Trailer brake controller By: RF_Burns on Mon, 20 January 2020 21:42
		Re: Trailer brake controller By: Tom Lins on Mon, 20 January 2020 22:50
		Re: Trailer brake controller By: jhbridges on Tue, 21 January 2020 08:39
		Re: Trailer brake controller By: RF_Burns on Tue, 21 January 2020 15:52
		Re: Trailer brake controller By: Carl S. on Tue, 21 January 2020 11:43
		Re: Trailer brake controller By: RF_Burns on Tue, 21 January 2020 16:13
		Re: [GMCnet] Trailer brake controller By: James Hupy on Tue, 21 January 2020 16:33
		Re: Trailer brake controller By: JohnL455 on Wed, 22 January 2020 08:46
		Re: Trailer brake controller By: jhbridges on Thu, 23 January 2020 09:44
		Re: Trailer brake controller By: RF_Burns on Thu, 23 January 2020 11:54
		Re: Trailer brake controller By: jhbridges on Thu, 23 January 2020 12:26

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