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Simulators >> RF Simulators >> What is actually "beat frequency"
https://designers-guide.org/forum/YaBB.pl?num=1232036048

Message started by DoYouLinux on Jan 15^th, 2009, 8:14am

Title: What is actually "beat frequency"
Post by DoYouLinux on Jan 15^th, 2009, 8:14am

Hi all,

Well, it may seem strange asking this question, perhaps you all know about this. However, it seems strange to me. :o

What is a beat frequency, as we can see from PSS SpectreRF sim ?

When I have 1 GHz and 900 MHz, it is equal to 100 MHz,

but when I have 1 GHz and 920 MHz, it is equal to 40 MHz ???

It is not equal to the difference between the two frequencies in all cases :-/

Thank you so much again,

DYL

Title: Re: What is actually "beat frequency"
Post by Frank Wiedmann on Jan 15^th, 2009, 8:28am

See http://www.designers-guide.org/Forum/YaBB.pl?num=1224609785/5#5. 40 MHz divides both 1 GHz and 920 MHz, 80 MHz does not.

Title: Re: What is actually "beat frequency"
Post by ACWWong on Jan 15^th, 2009, 10:18am

yes its the "highest common divisor" frequency for the large tone frequencies in your setup (including divided down frequencies).

Title: Re: What is actually "beat frequency"
Post by DoYouLinux on Jan 16^th, 2009, 12:02am

Oh, thanks a lot, guys :D

This helps me to be more clear on this

DYL

Title: Re: What is actually "beat frequency"
Post by pancho_hideboo on Jan 17^th, 2009, 6:29am

Your post is usage of specific EDA vendor's simulator. There is no Design issue.
Please post to "The Designer's Guide Community Forum ≫ Simulators ≫ RF Simulators".

DoYouLinux wrote on Jan 15^th, 2009, 8:14am:

What is a beat frequency, as we can see from PSS SpectreRF sim ?

There is no "beat" in analysis statement. Also see "spectre -h pss".
You should not use term "beat" in PSS setting. Expression of "beat" is not proper.
Fundamental frequency of PSS is not beat frequency.
I can't understand why Cadence has kept to use this expression of "beat" in PSS's setting UI.