[sdiy] Equation for converting V PP to dBm?

Andre Majorel aym-htnys at teaser.fr
Thu Dec 29 18:51:08 CET 2011


On 2011-12-29 17:01 +0000, Justin Owen wrote:

> 4) dB = 20 log10 (Vout / Vin)

Looks like you want a gain, so this one.

Careful when measuring small AC voltages. Some otherwise good
DMM can be pretty poor at that. Mine reads 10 mVAC with the
leads shorted !

-- 
André Majorel http://www.teaser.fr/~amajorel/


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