Generate Second Order Curve using Q and Resonance Freq???

[mboxler]

I would like to generate a curve based on a second order low pass. Attached is the filter and response from LTspice.
If I understand correctly, this combination of components gives me...

Resonance Freq 251hz
Q .95
Bandwidth 365hz

Using the Eq Generic Extended option, can I use these variables to create the same curve in REW? Or am I completely misunderstanding Q.

Thanks, Mike

 

[John Mulcahy]

The LPQ filter is a second order low pass with adjustable Q, that's available in the generic and extended equaliser options.

 

[mboxler]

Sooooo obvious! Thanks!

I'm sure there is a better way to do this, but I stumbled upon the Trace arithmetic A*B conjugate command. I can now take a raw driver measurement and apply this voltage curve to simulate the approximate acoustic response of a second order passive filter before ordering parts.

Again, thanks.

Mike

 

[John Mulcahy]

Use AxB for that, AxB conj is for cross correlation. You can also just look at the predicted trace on the EQ window.