Guys, thanks for the brainstorm ideas. Interference is to us.
And yes, it makes sense that since this is not a TV station building, these antennas are probably receive only. There is a huge omni antenna with "490" printed on the side, which is where we took the idea of 490MHz from, but it's only a guess. We're using Teldor shielded black uv-protected cat5e with ground wire. No Mikrotiks around (tho if the 5.8 don't work, we may be puttin in some 5.3 gear!!) On 10/29/2009 6:21 PM, jp wrote: > Is the interference to you or to the TV signal? > > What is grounded and where? Perhaps you are causing a ground loop by doing > grounding > differently than they did or something? > > If to the TV signal ? Are you using shielded cat5e cabling and grounding an > end of the > shield drain wire? > > Any other stuff installed with it, like mikrotiks or switches or anything? > > If to you, TV antennas on roofs don't transmit (currently). Any cell phone > tower > backhauls nearby or 5.8 phones? Perhaps the tv antennas are just a scapegoat. > > > On Thu, Oct 29, 2009 at 06:14:52PM -0400, Adam Greene wrote: > >> Hi, >> >> Just installed a 5.8GHz Alvarion VL on a roof with lots of TV antennas. >> Interference was horrible. We were not expecting that, as the main TV >> antenna culprit says "490" on the side -- I assume 490MHz. >> >> My obscure reasoning tells me that if there were a really strong signal >> on 483.33MHz, it might create a harmonic on 5.8GHz, which is 12 x 483.33. >> >> Has anyone seen interference of this type before? Do you think changing >> to horizontal polarization would help? Anything else we could do to >> mitigate the interference (besides putting up a lead barrier) :) >> >> Thanks, >> Adam >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
