[Ti] Airport questions....

[Kynan Shook]

Yeah, that's probably in about the right range.  I'm getting strength 
of about -62 dBm and noise of about -82 dBm.  I'm in a heavy 
residential area and we have 2.4 GHz phones in the apartment, and the 
base station is probably 20 feet away, through a door.

A couple things to remember; the unit of measurement is decibels.  The 
larger the number, the stronger the power (obviously, -63 is much 
greater than -93, hence you are getting a very good signal-to-noise 
ratio)  A signal that is twice as strong will increase by 3 dB.  A 
difference of 10 dB means the power is 10 times greater.  A difference 
of 20 dB is 100 times greater - in your case, there's a difference of 
30 dB; that means the signal is about 1000 times stronger than the 
noise.
Also, the amounts of power here are absolutely tiny.  -30 dBm is 1 
microWatt.  -60 dBm is 1 nanoWatt.  -90 dBm is 1 picoWatt.  The total 
output power of an Airport base station is 15 dBm, or roughly 30 
milliWatts.  So you're picking up roughly one 60 millionth of the power 
that is being put out.  ;-)

I'm sure if I screwed up my math here, somebody will jump in to save 
me...

Robert Nicholson <robert at elastica.com> writes:
> So, I'm running my Tibook about 3 meters away from my basestation.
> Is it normal to see
> Strengh -63 and Noise -93
> Is that normal?