RF Cascade Workbook for Excel
RF & Electronics Symbols for Visio
RF & Electronics Symbols for Office
RF & Electronics Stencils for Visio
RF Workbench
T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads
Espresso Engineering Workbook™
Smith Chart™ for Excel
|
 |
Conversion of EVM measured in db to % - RF Cafe Forums
|
| 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
|
|
| |
| Site Admin |
 |
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
|
|
|
|
 |
