This was with an rb532 at each end of a test link outdoors. I think it was with 2.9.10 wireless-test and either a sr5 or cm9 card, sr5 most likely. I have since taken the link down and haven’t tried it with 2.9.12. The bandwidth tester in the rb532 was used between the two systems, all default settings except for traffic direction. nstreme, default packing , routed not bridged.
I noticed as I changed channel size between 5,10,20,40 mhz, the signal to noise ratios decreased. At 40mhz, the SNR went down enough that I could not have a 54mbps link. 20mhz channels were about as effective as the turbo connection, especially when the turbo connection lost snr and the wireless datarate dropped to 24mbps. I’m not using anything on these frequencies and I doubt anyone else is either since I am using pretty directional antennas and not a huge link distance. With 5.8 I could use more power and overcome this, but the goal was to see what could be done with different bandwidths in the lower power 5ghz band.
Why is the signal strength and SNR greater in the lower channel width choices?
band: 5ghz-5mhz
frequency: 5200MHz
signal-strength: -63dBm
tx-signal-strength: -61dBm
signal-to-noise: 38dB
2.9 mbps in each direction
10.5 mbps in one direction
band: 5ghz-10mhz
frequency: 5200MHz
signal-strength: -65dBm
tx-signal-strength: -64dBm
signal -to-noise: 34dB
6.8 mbps in each direction
18 mbps in one direction
band: 5ghz
frequency: 5200MHz
signal-strength: -68dBm
tx-signal-strength: -67dBm
signal-to-noise: 28dB
18.3 in each direction
35 mbps in one direction
band: 5ghz-turbo
frequency: 5210MHz
mbps in each direction
18 mbps in one direction
signal-strength: -74dBm
tx-signal-strength: -71dBm
signal-to-noise: 14dB
21 mbps in each direction
43mbps in one direction
however, datarates went down as snr went down