Test and Measurement Forum

Decibel measurement

Forum for discussing PicoScope version 6 (non-automotive version)

Decibel measurement

Postby martlab » Tue Mar 29, 2011 11:43 am

Hello everybody,
I'm a newbie with PicoScope 6 and I've not yet understood how to obtain a dBu measurement from a signal.
I use PicoScope 6.5.74.42 with a 3205 hardware.
I create a custom math channel with the formula 20*log(A/0.775), I add the measurement to my scope (True RMS - Whole trace), but I have no signal! What's going wrong?

Please help me!
martlab
 

Re: Decibel measurement

Postby ziko » Fri Apr 01, 2011 1:20 pm

Hi try using the abs function or try doing 10*log(A*A/0.775*0.775) kind regards. In terms of the mesurements I will investiage this.

Kind regards
Ziko

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