Hi everyone…I experimented with the new release last night, very impressive boosts, but ran into a little snag wondering if anyone can help me with…3.65 450I AP, with two subscribers on same home tower 3 miles out, with 450B parabolic antennas on tower only separated by approx 2’…S/N went down considerably and performance of both decreased, while other customers scattered went way up…assuming interference between the two SM antennas on same tower both running considerable data, especially now with the new settings…More separation I’m assuming is necessary, vertical only am hoping…but asking for input what might help with these two…Thanks!!!
PS, I went from 2.5Ms to 5Ms, and 64 to 256VC when this happened…
If you change from 2.5ms to 5ms frames, you’ll also need to change all adjacent radios to 5ms frames and check their other sync related settings to make sure that the timing is good. You can quickly and easily check to see if your timing settings are good by using Cambium’s PMP/PTP 450, 450i, 450m Co-location / Throughput Calculator collocation spreadsheet here:
Thank you Eric…this AP is the only one feeding these customers and is on a separate non-shared frequency, and the two subscribers are both receiving service from this single AP on the same frequency and AP…So I’m thinking the two subscriber units are interfering with each other and needing spacing or one of them to be relocated, or should the characteristics of the AP prevent this interference in the data timing?
So if you change back to 2.5ms frames, do link tests improve?
Yes…but there appears there was interaction between the two SM antennas regardless even with old firmware and settings of 2.5Ms…that we never noticed until we switched to 5MS…so the new settings just made it worse on these two SM antennas…Other customers on the same sector showed nice increases in throughput…
You should probably open a ticket and get some guidance on what the minimum separation between SM’s on a building would be.
Try briefly shutting down one of the SMs in discussion to see if issue goes away. If so, switch the shutdown SM and observe again. If each test improves the situation then you more than likely found the issue.