ATH Spectral Scan

[tj]

Hi wireless,

I am trying to get spectral scan working on the AR9462 in my acer c720.

As per: 
http://freebsd.1045724.x6.nabble.com/spectral-scan-now-works-on-ar93xx-and-later-chips-td6057123.html

I built a kernel with:
     options ATH_ENABLE_RADIOTAP_VENDOR_EXT
	 options ATH_DIAGAPI

Based on:
http://freebsd-wireless.freebsd.narkive.com/94wkUBBj/howto-tinkering-with-spectral-scan
and discussions with Adrian on irc I built and ran:
	tools/tools/ath/athspectral
	and
	https://github.com/erikarn/ath_radar_stuff

	# sysctl dev.ath.0.monpass=0xff
	# athspectral -i wlan0 get
	# athspectral -i wlan0 start
	# fft_eval ar9280 if wlan0 

Which gives ony gives me output like:
http://adventurist.me/2ghzscan.png
http://adventurist.me/5ghzscan.png

I am expecting output similar to:
https://people.freebsd.org/~adrian/ath/fft_snapshot_2ghz.jp.png

- [tj]