# Conversion of EVM Measured in db to % - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

tyjose
 Post subject: Conversion of EVM measured in db to % Posted: Wed Dec 26, 2007 3:21 am
 Captain

Joined: Sun Jun 26, 2005 11:47 pm
Posts: 5
Location: India
Hi
any body can help me on a direct formula for converting EVM measured in db to %

Kirt Blattenberger
 Post subject: Posted: Thu Dec 27, 2007 12:59 pm

Joined: Sun Aug 03, 2003 2:02 pm
Posts: 476
Location: Erie, PA
 Greetings tyjose: Since EVM concerns voltage and not power, the conversion is simply 10^(EVM in dB/20) Multiply by 100 to get % Example: EVM = -15 dB = [100 * 10^(-15/20)] % = [100 * 0.17782] % = 17.8 % _________________- Kirt Blattenberger RF Cafe Progenitor & Webmaster

Posted  11/12/2012

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