Thanks Jon, but not in this audio context where there is no carrier. I
think it means relative to C weighted noise, but that is normally written
dBrnC. I think you're right about dBu.
Fraser
dBc means: DB in reference to a carrier.
Typically this is used for IM measurements or harmonic measurements. If
an amp has an IM level of -40 dBc, that means the IM products were 40 dB
below the carrier signal.
I am not sure what dBu is. Could be dB referenced to microvolts.
73,
Jon
KE9NA
--------------------------------------------------------------------------
The Second Amendment is NOT about duck hunting!
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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