text output from NetworkManager ?

[Borge Kile Gjelsten <b k gjelsten fys uio no>]

Hi,

I would like to use NetworkManager to dump info on the signal strength
(32%, 47%, etc.) into a text file at e.g. every 5 seconds, or some similar
approach which would help me test the wireless network at various
positions in a big office landscape.
I thought this might be doable from a terminal, but have found no way
so far.

In principle I can of course get this information by moving the cursor
over the NetworkManager icon on my panel and read by eye.
This is however somewhat impractical.

If what I seek is not possible with NetworkManager, is there some other
tool which allows me to monitor a wireless signal as a function of time?

(I am using Ubuntu 9.04.)

Thanks,
BKG