10m is the standard, but other distances are allowed. If there is ever a
problem, data taken at 10 m will be used to judge your equipment. As a
practical matter, we test our equipment at 3m because of ambients. My
recommendation is to test at 10 m unless there are circumstances that
prevent it or complicate the measurements. If there are strong ambients,
a test at 10m may take longer which would translate into cost. You can
always test at 3m and then retest signals with minimal margin at 10m.
----------
From: robert.m...@engineers.com
To: emc-p...@ieee.org
Subject: Distance of Measurements
List-Post: emc-pstc@listserv.ieee.org
Date: Wednesday, June 11, 1997 4:11PM
For measuring emissions per CISPR 22B what is the proper distance for
the placement of the antenna?
Is it 3m? or 10m?
[I'm running across reputable labs that claim there is nothing wrong
with measuring everything at 3m, just like FCC B.]
- Robert -
robert.m...@engineers.com
AJM Electronics
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~ OLX 2.1 TD ~ You'd be surprised how much it costs to look this cheap.
