A quick and dirty script to put in your crontab to see what the hell is going on! MacBook Airs act funny with power management and their SNR. Also, with the RSSI and noise floor you can just subtract the noise to get the SNR. At the end of the day though it's the SINR that counts + proper tools are required to diagnose non-802.11 interference, CCI, ACI, throughput and retries....
## Then put the below in your crontab for every minute (with your own path of course)…
* * * * * /Users/useraccount/wifitest/wifi.sh > /dev/null 2>&1
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