Not Getting Accurate FRD and ZMA

[KING DRANZER]

I am using FPGraphTracer to get FRD and ZMA files from the pic of the graph and the resulting output is not accurate. I am having this problem with only specific driver "Fountek Neo X1.0" as it worked fine for other drivers.

 

[ernperkins]

Did you double check your axis settings? This graph starts at 1 KHz which isn't typical. Using your picture I was able to get the FRD without any problem, but I did have to color the impedance plot before FPGraphTracer could trace it. I attached the FRD and ZMA files (renamed as .txt so I could upload them).
A couple of notes:

- IMO the FRD really needs more information added below 1 KHz to be useful for simulations. My first approximation would be to add a -12 dB/octave "tail" starting at 1 KHz. Several free programs allow adding "tails", XSim is one.

- The graphs will look a lot different when displayed on a 20Hz - 20 KHz graph.

Hope this helps...

 

[KING DRANZER]

Thank you very much. The problem was with db scale as it was not being read accurately. Even-though it was maxing out at 100db the resulting file was capping the top at 110db instead.