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Simulators >> RF Simulators >> EVM value in Cadence SpectreRF envelop analysis
https://designers-guide.org/forum/YaBB.pl?num=1291529363

Message started by Mehran on Dec 4^th, 2010, 10:09pm

Title: EVM value in Cadence SpectreRF envelop analysis
Post by Mehran on Dec 4^th, 2010, 10:09pm

Hi All,

I am simulating a QPSK transmitter using envelop analysis in cadence. when I plot the EVM, I can see the constellation and the EVM error percentage on the wave scan. But I can't have that percentage error as a scalar value. Is there any way that I can obtain the calculated percentage error as a scalar value? I would like to change some parameter later and plot the EVM error percentage based on the swept value.

Thanks in advance,
-Mehran

Title: Re: EVM value in Cadence SpectreRF envelop analysis
Post by Mehran on Dec 5^th, 2010, 2:10am

Hi,

I know EVM is a scalar value. Maybe I couldn't make myself clear. When I use direct plot in analog design environment (Cadence Spectre-RF after envelop analysis), just like the post you refer me to it, I can see the constellation. The EVM value and number of the symbols are written on the constellation graph as a label. I would like to know if there is any way I can get the calculated EVM and number of the symbols as a scalar value returned to the calculator and not a label on the graph? Is there any calculator function or OCEAN function that can do it ?(other than evmQpsk in calculator because its the same thing at direct plot)

Title: Re: EVM value in Cadence SpectreRF envelop analysis
Post by Mehran on Dec 5^th, 2010, 2:16am

Hi Panchoo,

http://www.designers-guide.org/Forum/YaBB.pl?num=1260978648

you had this problem before. This was your question:
is there any method to get EVM value and Numbers of Symbol as string or numeric data from results of evmQpsk() ?

did you solve it?