Hello, So I've improved the radiation pattern software to automatically: 1) Normalize the graphs to 0dB 2) Rotate the peak amplitude to the 0 degree position 3) Find the -3dB power points and calculate beamwidth 4) Measure the -120 and +120 degree power levels (adjacent antenna interference angles) 5) Detect the angular measurement resolution 6) Generate R-code for graphing 7) Spit out all the numerical details that belong with the pretty picture Using this wonderful new automation (so easy to do now!) I put the ARC Wireless "variable sector" "120 degree" antenna through its various settings. The results are on the antenna's lab page: https://www.hamwan.org/t/tiki-index.php?page=ARC+ARC-VS5818SD1&structure=Ham... The bogosity of "variable sector" is visible as the radiation pattern hardly budges between 60deg, 90deg and 120deg adjustment positions. This a fixed 60 degree sector antenna as far as I can tell. If HamWAN was using 6-sector cells it would be perfect. Next I re-ran the measurements on the Laird, with the results updated on the antenna's lab page: https://www.hamwan.org/t/tiki-index.php?page=Laird+SAH58-120-16-WB&structure... Pretty good show, just like last time. A calculated 3dB beamwidth of 111 degrees is a lot closer to the 120 deg spec than the ARC Wireless. The +/- 120 deg rejection though could be nasty in real life. Gotta check it out without all these echoes. One obvious thing is that the graph isn't centered correctly. This is because the centering/rotation algorithm aligns the 0 deg mark with the maximum signal reading over the whole pass. In this case, that was an off-center lobe on the front face of the antenna. I need to re-work the auto-centering so that it uses the -3dB points instead and centers right in the middle of them. But tomorrow, too tired tonight. In short, the sector antenna story is sucking. We need good + cheap sector antennas for this thing to work! The Laird is $180/ea with questionable +/- 120 deg rejection. --Bart