|
Lin Gu ([EMAIL PROTECTED]) posted these
numbers to the tinyos-help list in response to
another user's query. I think
they're relevant to tinyos-users, too, so I'm
reposting here.
Note that later in the email thread, Joe
Polastre pointed out,
"Remember that the
use of an external antenna
will significantly alter these results. I'm
able to get up to 30 yards with a pot setting of 10
and an external antenna in our lab which has significant RF noise." -kw
----- Original Message -----
From: "Lin Gu" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, June 09, 2002 1:26 PM
Subject: Re: [Tinyos-help] Signal strength of the radio > > P: Potentiometer setting > D: communication distance > > P D > 99 0 inches (no communication even when put side by side) > 95 side by side > 90 1-2 inches > 80 3 inches > 64 8 inches > 32 15 inches > 16 25 inches > 8 3 feet > 4 3 feet > 2 a little more than 3 feet > 0 a little more than 3 feet > > The test environment is a compurter room where various electromagnetic waves may exist. So this data can be viewed as a reference of the expected radio radius as in usual or moderately tough environment. > > lin > > |
