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Conversion of EVM measured in db to % - RF Cafe Forums
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| tyjose
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Post subject: Conversion of EVM measured in db to %
Posted: Wed Dec 26, 2007 3:21 am
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| Captain |
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Joined: Sun Jun 26, 2005
11:47 pm
Posts: 5
Location: India
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Hi
any body can help me on a direct formula
for converting EVM measured in db to %
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Kirt Blattenberger
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Post subject:
Posted: Thu Dec 27, 2007 12:59 pm
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| Site Admin |
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Joined: Sun Aug 03, 2003
2:02 pm
Posts: 476
Location: Erie, PA
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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
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Posted 11/12/2012
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