Hello,
I have a few of those guys ArubaOS (MODEL: 325), Version 6.5.4.3, like stand alone WAPs, without a controller.
Spend a lot of time to figure out how to set channels and power over the config file. According to this useful thread, it's an ap-env variables, and they can be set up over a cli as well as a web interface.
I found one solution - to create a config file in way like this (let's called it tftp config):
----env start----
name guest-wap3
wifi0_arm_channel 36
wifi0_arm_power 40
wifi1_arm_channel 1
wifi1_arm_power 40
standalone_mode 1
----env end----
----config start----
version 6.5.4.0-6.5.4
virtual-controller-country us
....
----config end----
and then upload it over tftp - it works fine, but if you'll try to upload it from the web page it raises an error. Anyway it's better then nothing, but I still have two question according to this:
1) when I try to set some channel/power over the web the result would be like this:

but in the cli wifi*_arm_power changed to wifi*_arm_power_10x:
# show ap-env
wifi0_arm_channel:36
wifi0_arm_power_10x:40.0
wifi1_arm_channel:1
wifi1_arm_power_10x:40.0
what does that mean?
I've tried to apply those settings (ch. 36 power 40, ch.1 power 40) over a tftp config and the result was a little bit different:
wifi0_arm_channel:36
wifi0_arm_power:20
wifi1_arm_channel:1
wifi1_arm_power:20
there is no power_10x and power now 20 only...
2) can't apply over tftp config 80MHz channels for 5GHz radio. For example you can select E channels (like 36E, 52E, 100E and so on ) in the web as well as set them over the cli manually and the result would be:
wifi0_arm_channel:116E
wifi0_arm_power_10x:40.0
but if use tftp config it'll be:
wifi0_arm_channel:116
wifi0_arm_power:20.0
and now it's not a question in arm power, let it be even half, why it can't apply 116E and does 116? Maybe I have to use another notation?
Thanks for any thoughts.