In message
,
dated Sun, 28 Apr 2013, Pat Lawler writes:
Do these names reference the same basic design, or are they different
animals? Which ones are used for which type of RF immunity test?
IEC 61000-4-21 (114 pages) contains a great deal of information on this
technique. A note to the d
Not obvious to me that the original question was asking for a
recommendation; only a definition.
That being said, the below seems to be somewhat at odds with MIL-STD-461
paddle position requirements. Table VIII in that standard requires the
following number of paddle positions as a function of fre
I never studied the statistics of what you describe, but I recall some numbers
that I had for a large (50’ long x 20’ wide x 12’ high) completely bare (no
anechoic material and not even a test bench) shielded chamber. I had three
“stirrers”; a large 4’ x 8’ flat panel rotating about 6 RPM, a med
The debate amongst the proponents that I heard concerned the concept or idea of
matching, or not , test program cycle time with paddle cycle time. The tuned
folks argued that the paddle should stop at each step for a program cycle time,
then there was the debate over how big is each step. At h
Pat:
It might just be the name you like best depends on your experience.
Considering that most chambers depend on rotating or oscillating conductive
mechanical structures, you might think of the paddles acting like big blades
in a mixer or stirrer. A waveguide guy might be thinking more in term
One can mode-stir or mode-tune a reverb chamber. Mode-stirring is continuous
the paddle never ceases movement and mode tuning utilizes a stepping
movement, holding each mode for a specific time period to allow assessment
of susceptibility.
Can¹t speak for others, but MIL-STD-461 only allows mo
All,
Over the years, I've come across pictures of test chambers with
descriptions such as mode-stirred, mode-turned, and reverberation. They
seem to look similar, with metal walls and rotating metal paddles.
Do these names reference the same basic design, or are they different
animals? Which on
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