Is the other path 4 degrees off from you on the same frequency and polarization? If so, wow, 4 degrees doesn't sound like much. Have you checked with your frequency coordinator to see if that's kosher? Maybe it is, I don't know how they determine such things, just seemed surprising to me, even with Cat A antennas having very narrow beams and low sidelobes.
Also curious, does the signal go away completely after noon? That seems strange, unless it's being affected by some sort of ducting or reflection. 18 GHz links normally transmit 24x7. -----Original Message----- From: AF <af-boun...@af.afmug.com> On Behalf Of Nate Burke Sent: Thursday, August 29, 2019 7:56 AM To: Animal Farm <af@af.afmug.com> Subject: [AFMUG] Tracking Down Licensed Noise In my ongoing saga of troubleshooting an 18ghz link, we think we're pretty sure the issue we are having now is Noise. From around 7am - noon or 1pm, the background noise on my Horizontal polarity goes to about -81. Has anyone had to troubleshoot finding the source of noise on a licensed channel? Do you just start contacting everyone on the same channel within a few miles and see if they will disable their transmitter to see if it goes away? We have found 2 other licenses which are pointing kind of at us. If I point my dish (in RX only mode) at one of the transmitters, which is 10 degrees off my path (I am 4 degrees off their path), I hear it at -70 The Other license is for one of the Day Traders. The GPS Coordinates in the License put it 20 degrees off my path, I know there is no dish where the GPS Coordinates say. However, if it's where I think it might be (on a pole on the other end of the building), then it's basically pointing at me. Although, with it being a Day trader, there's a good chance it was never installed, or has been decommissioned. Those guys throw licenses and dishes up and down like yesterdays fashions. Any Tips for the next step? -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
