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

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

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:

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.