Laryn Lohman wrote: > An ISP installed some Motorola Canopy equipment with the antennas > about 20 ft. horizontally from our 2M receive antenna. The noise > floor went up at least 10db. In this case, I had the option of moving > our antenna so it is now about 80 ft. horizontally away. No noise at > all from their equipment now. > > I believe that the bulk of the noise is digital processing junk, not > related to their transmitter(s). (But could easily be proven wrong on > that one...) It's pretty broadband in the VHF region, but I have not > heard any problem at all with a 70cm receiver using an antenna in the > same position that the 2M antenna was mounted. > > Laryn K8TVZ
Right. The Canopy that I have seen uses unshielded "satin" cable to the antennas. Not even Cat5. And what's on those cables is essentially 10-baseT data and power for the actual transceiver, I believe. It would be VERY dirty in any case.
