•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<
Job Board
About RF Cafe™
Copyright 1999-2015

Conversion of EVM measured in db to % - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.

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

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

 Post subject:
Posted: Thu Dec 27, 2007 12:59 pm 
Site Admin
User avatar

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 %


EVM = -15 dB

= [100 * 10^(-15/20)] %
= [100 * 0.17782] %
= 17.8 %

- Kirt Blattenberger :smt024
RF Cafe Progenitor & Webmaster

Posted  11/12/2012
Custom Search
More than 10,000 searchable pages indexed.

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website