Check this:We've been having to connect a UBNT product to do a spectral analyzer lately. Does Mikrotik have plans for doing anything similar? The "freq usage" isn't really worth a darn. I heard somewhere you can get a better view using the terminal?
Open source driver (eth10k) support spectral scan for QCA98xx chipset familyThis is on the linked page ( http://wiki.mikrotik.com/wiki/Manual:Spectral_scan ): "Currently, this feature is supported only for Atheros AR92xx, AR93xx and is NOT supported for Atheros 802.11ac chips (e.g. QCA98xx)."