Stupid question regarding voltage levels

[Rory McDonald]

a great article about the decibel:
http://www.prorec.com/prorec/articles.nsf/8380cd588060ef03862565e2000db872/e
a68a9018c905afb8625675400514576?OpenDocument

> -----Original Message-----
> From:	jaroslav Lukesh [SMTP:lukesh at seznam.cz]
> Sent:	Tuesday, August 03, 1999 11:28 PM
> To:	jamos at technotoys.com; synth-diy at mailhost.bpa.nl
> Subject:	Re: Stupid question regarding voltage levels
> 
> > I feel the fool, but I don't have any references handy...
> > 
> > What is the reference level for 0 dbM? And are these ratios based on
> > voltage, or power?
> 
> 0 dBm=
> 	Voltage: 0,775V
> 	or power 1mW onto 600 Ohm
> 
> Another: decibels-microvolts:
> 
> 	0dBuV=1uV (1 microvolt)
> 	20dBuV=10uV (10 microvolt)
> 	60dBuV=1mV (1milivolt)
> 	
> 	but these are used mainly in radioelectronics.
> 
> 
> Jaroslav Lukesh