So use shielded cat 5 and bond it to earth ground.... JH ----- Original Message ----- From: "Sam" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, November 14, 2003 5:37 AM Subject: Re: APPO Interfering with VHF TV?
> The 110 vac is inside the store (and at the other tower, inside the little > bld at the bottom of the tower). The power shot plugs into a hub there, > and utp CAT 5 goes from there up to the radio. From the radio there is > about a five foot piece if LMR-400 going to the omnis. > > The interference is coming from the CAT 5 after it leaves the powershot, > all the way up to the radio, and from the radio itself. (This was > confirmed with a spectrum analyzer). There is nothing coming from the > LMR-400 nor is there interference coming form the omni. > > > > On Fri, 14 Nov 2003, Stuart Pierce wrote: > > > Is that ethernet coming from the APPO to inside the store ? Also what is > > the cable between the APPO and the omni ? Does the ethernet go into a > > switch/hub/router ? > > > > ---------- Original Message ---------------------------------- > > From: Sam <[EMAIL PROTECTED]> > > Reply-To: [EMAIL PROTECTED] > > Date: Thu, 13 Nov 2003 22:51:37 -0600 (CST) > > > > >Hi Everyone > > > > > >Here's one I haven't seen here before..... > > > > > >I am in the process of expanding into a new town. The company who's tower > > >I'm using for my APPO is telling me that when my APPO is powered on it > > >interferes with their TV reception - specifically channel 7 (VHF). > > > > > >I don't know how 2.4 GHz would bother channel 7 (which is what, 140 MHz?) > > >but I know the guy who owns the tower, and he woudn't make this up. Plus > > >he is sharp with computers/electronics. If he unplugs the power to the > > >APPO the signal instantly clears up. Plug the APPO back in and channel 7 > > >becomes unviewable. > > > > > >This is important because his business is a TV store and he uses the > > >off-air signal (channel 7) to demo new televisions to his customers. > > > > > >The tower is set up like this: > > > > > >| > > >My Omni Antenna > > >| > > >| 10 feet > > >| > > >------- His TV Antenna > > >| > > >| > > >| 60 feet > > >| > > >| > > >| > > >| > > >Building with TVs for sale in it > > >------------------------------- > > > > > >My omni antenna is horizontally polorized, 12 dB. There are no amps on my > > >stuff. > > > > > >Are there any filters I can get or anything I can do to help prevent this? > > >I can move my antenna to a different location in town as a last resort, > > >but I'd really like to keep it where it's at. But the guy's main business > > >where it's at now is selling televisions, and leaving it as-is is not an > > >option. Would putting the TV antenna above the omni make any difference? > > >Is there anything else I can to to prevent the interference? > > > > > >Thanks Everyone! > > >Sam > > > > > >Update: I also found out that I'm knocking out Channel 7 all over the > > >town. (One of my APs is on the local television tower.....) If I can't fux > > >this I'll have to move that one too, and that would be devastating. :( > > > > > >--- > > >[This E-mail scanned for viruses by Declude Virus By Avolve.net] > > > > > > > > --- > > [This E-mail scanned for viruses by Declude Virus By Avolve.net] > >
