In message
<ofccd4cf83.4b9257f0-on88257984.0063c6c2-88257984.00684...@selinc.com>,
dated Fri, 13 Jan 2012, [email protected] writes:
I am wondering if the IEC committee really intended this,
I think so.
or if they were thinking of total harmonic distortion as a ratio of
powers, as some definitions hold it to be.
I have not seen such a definition. THD in percentage is always on a
voltage basis.
This would put the total harmonic power at -20 dB relative to the
fundamental, which is within the performance specifications of standard
broadband RF equipment.
But the frequency range here is 10 kHz to 150 kHz, which is 'audio' in
many people's estimation. I am inclined to agree that it seems
unnecessarily stringent. Direct complaints to the US TAG for IEC SC77B.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Some people who are peeling the finch of the financial crisis are thinking of
biting a rook.
-
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