What about intermod? I know in the 2-way radio world that two transmitters can mix with each other but I never knew if it could mix with the Ethernet or if that wasn't high enough power to be an intermod issue.
On Thu, Jun 8, 2017 at 9:43 AM, Chuck McCown <[email protected]> wrote: > Forgot about that trick. In the early days of canopy I solved a few TV > interference issues with that method. > > *From:* Kurt Fankhauser > *Sent:* Thursday, June 08, 2017 6:48 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] Interference on a repeater at 149 MHz > > Try switching all the ports to 10-BaseT and see fi noise goes away. > > On Thu, Jun 8, 2017 at 1:25 AM, George Skorup <[email protected]> > wrote: > >> That's all fine and good, but I pointed out that the contractor tied >> their heliax to our conduit all the way up. That was about the dumbest >> possible thing they could've done. There's cable hanger bars that are about >> 3 feet wide and we're all the way to one side with our conduit. That's just >> fucking lazy. >> >> On 6/7/2017 11:31 PM, Brian Webster wrote: >> >> The problem with this attitude to the fix, you as the WISP are now an >> unintentional radiator interfering with a licensed service. This will get >> you a visit from the FCC and you will be at fault no matter what. Because >> you have equipment that is unintentionally radiating in licensed spectrum, >> based on all FCC rules you lose and you get fined. This would be the case >> even if you had no RF equipment on the site. That is why gear has >> certifications for emissions for class a and b computing devices to assure >> they do not radiate any unintentional RF signals. Once you install any >> equipment like that outside the parameters the gear was certified under, >> you become liable for the fines. >> >> >> >> As mentioned by others fix the problem, if they call the FCC you will be >> screwed plain and simple. >> >> >> >> The school is not SOL because of your gear, you are. You are an >> unlicensed system radiating on their frequencies…… it is your >> responsibility to eliminate that interference as soon as you are notified >> and it is shown to be your equipment causing the problem. >> >> >> >> Thank You, >> >> Brian Webster >> >> www.wirelessmapping.com >> >> www.Broadband-Mapping.com >> >> >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *George Skorup >> *Sent:* Wednesday, June 07, 2017 7:56 PM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] Interference on a repeater at 149 MHz >> >> >> >> We have a local school district co-located with us on a water tower and >> they're complaining about noise on their input. I pretty much told them >> they're SOL until we need to add or replace cables since they're all in an >> 1-1/4" PVC. So we'll have to run temp cables up, rip all the cables out of >> the pipe and pull new ones. The village said we have to be in conduit. And >> we do have a couple cables in use that aren't shielded. They didn't offer >> to pay for it, so too bad. >> >> They're running a Kenwood repeater in an outdoor cabinet. Maybe 12U. >> Obviously that's not going to fit the proper large can cavity duplexer like >> a Sinclair. Plus they have >4.5MHz split, so no doubt that let them use a >> smaller rack-mounted duplexer. >> >> So I'd be curious to know what the setup is on this 149MHz repeater. Are >> they using a small crappy duplexer with a large split, too? >> >> On 6/7/2017 5:55 PM, Lewis Bergman wrote: >> >> I don't think so. I am assuming they probably didn't install some >> connectors correctly. Unless they are using some extremely crappy gear the >> RF portions of all half decent repeaters are shielded very well. Unless >> they modified the repeater leaving some shielding off the connectors are >> the most likely source. I guess there could also be punctures or some such >> in the coax as well. >> >> >> >> On Wed, Jun 7, 2017 at 5:51 PM Jaime Solorza <[email protected]> >> wrote: >> >> Lewis. You are assuming the VHF gear was properly installed...few folks >> do right first time... someones laziness or lack of knowledge is another's >> opportunity to make some cash >> >> >> >> On Jun 7, 2017 4:41 PM, "Lewis Bergman" <[email protected]> wrote: >> >> Has anyone checked their connectors/connections between all RF points? >> Antenna to cable, cable to duplexer, duplexer TX/RX to repeater. >> >> >> >> Most of the time I have seen Two Way equipment either be interfered with >> or interfere with someone else it is a connector issue. The only other case >> I have seen issues should be able to be determined by an intermod study. I >> doubt it has anything to do with intermod. My bet is a faulty connector. I >> would assume it is the RX side so I would check the RX Repeater port to the >> RX port on the duplexer and then the rest of the connectors. >> >> >> >> Not saying it can't be the the CAT5, just that if all is good on the >> antenna system I haven't ever seen an issue and I have a lot of sites with >> both two way and 900, 2.4, and 5GHz operating on all kinds of speeds both >> POE and not. >> >> >> >> >> >
