Your statement: "there are too many uncontrolled variables to allow a
narrower tolerance." is, in my opinion, exactly the issue.
Accredited labs are required to calculate and express their measurement
uncertainty. This is generally near plus or minus 4-5 dB. I expect that
many of the folks on this forum will have noticed that the uncertainty
with respect to EUT setup is far greater. I was the benefactor of a free
trip to South Korea, only to find the measurement delta was caused by
the length of a DC power feed from one site to another.
I had many folks tell me "EMC is Black Magic". It only seems that way
when we can't wrap our arms around all the variables!
Respectfully,
Brent DeWitt, AB1LF
Milford, MA
On 10/7/2024 7:08 PM, doug emcesd.com wrote:
there are too many uncontrolled variables to allow a narrower tolerance.
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