100mbps FDD link is the worse...not sure if 1000Mbps affects two way Systems in VHF bands...shielded cabling and ferrite is one solution....conduit and isolation is another....you should also be on different power and grounding sources. Isolators can help if you can't separate power.
On Jun 6, 2017 2:33 PM, "Chuck McCown" <[email protected]> wrote: Ferrite and shielding. -----Original Message----- From: Craig House Sent: Tuesday, June 06, 2017 2:21 PM To: [email protected] Subject: Re: [AFMUG] Interference on a repeater at 149 MHz I'm afraid you may be right. Yes we have killed all of the devices one at a time and it appears the noise detected drops by a couple of DB with each device we unplug. But since the devices are POE is there even a solution to this?? Sent from my iPhone On Jun 6, 2017, at 15:19, Chuck McCown <[email protected]> wrote: > > Have you killed each of your devices one at a time to localize it to a > device? > I would suspect ethernet noise. > > -----Original Message----- From: Craig House > Sent: Tuesday, June 06, 2017 2:17 PM > To: [email protected] > Subject: [AFMUG] Interference on a repeater at 149 MHz > > We have equipment located on to Towers one is a water tower the other is a > guyed110 foot tower. In both locations there are two way repeaters located > on the towers that are receiving interference from what appears to be our > equipment. Nothing is substantially common between the way the two towers > are built out. The water tower had all of the equipment on top of the tower > at one point and we have since moved all of our backhauls down to the > catwalk railing on the opposite side of the tower from the two-way repeater > attempting to put some distance between our equipment and the repeater but > has not solve the problem. > We have ePMP both 2.4 sectors and the 5 GHz Omni as well as some ubiquity > air fiber five and Power beam M5 radios on the water tower all running off > of net tonics 24 port switch and the microtik router. The other Tower has > only a few m5 radios and and M2 Omni. It also has an air fiber 5X amount of > lower on the Tower around 55 feet. Everything on this Tower has ethernet > cable's running to the base where our equipment is running from an old CMM > micro or their own power supplies in the case of the air fiber. Everything > at this Tower is located inside of a metal communications cabinet at the > base. In both locations we have removed old 900 FSK radios which were a > source of interference but the problem seems to have come back. I'm looking > for ideas on what others have found may be the source of interference or > solution because I'm tired of throwing darts blindfolded and hoping I find > the right Target. > > Sent from my iPhone > >
