5740 is missing from the 20mhz frequency selection for scanning. Just a heads up for people doing swap outs and the cpe doesn't reconnect to the master at 5740 with 20Mhz.
Other things are off too, in 40Mhz it shows in the scan list it will connect to something at 5745 - but the lowest you can go in 40Mhz channel is 5750.
What regulatory domain ? Can't be a FCC radio, I've never seen 5740 @20Mhz as an option on ePMP 3k AP or CPE even before DFS channels were available. Also, 5745 @40Mhz is an option on FCC AP and CPE 1k, 2k and 3k.
5750 is the lowest i'm allowed to set on a 2k AP using 40Mhz channels. It's also the lowest that CPE's will scan for.
I should of clarified that it's not as if5740 used to be an option on 3k equipment and now its not - but that if you're swapping force 200 CPE with a force 300CPE and the AP is on 5740 at 20Mhz then you won't get it to reconnect.