[time-nuts] Sound Card Spectrum Analyzer
lists at cq.nu
Fri Feb 19 12:22:00 UTC 2010
Great screen shots showing phase noise measurement and just what the "problem" is.
The top trace and the bottom trace show the same noise data. Different frequency ranges are shown, but it's the same noise. The scale on the Y scale on the traces shifts significantly between the two traces. That's because the Y scale is not calculated in terms of PSD (power spectral density). For noise that's a *very* useful thing.
On Feb 18, 2010, at 11:36 PM, Chris Caudle wrote:
>> The application is measuring phase noise.
> Have you looked at Jack and Alsa Audio Analyzer?
> Take a look at the screen shot and see if it looks interesting:
> Chris Caudle
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts