That was me, in comment #10
You can get a "real-time" dBm reading by going to the Information page, from the main menu, then the following sequence (it takes a bit of practice to get it right):
* Click joystick thingy
* 224132 (red, red, white, blue, yellow, red)
* Click joystick thingy again
Just be careful to get the sequence right - there's another one that initiates self-destruct....
P.S. I'm kidding about the self-destruct part
