Reply To: Reconciling bin size, span, trace length, center frequency, and start frequency

Hi Andy,

I apologize for the confusion. The span found in the bbr file is the span that was entered by the user. Due to a number of reasons we aren’t able to hit the span,start,stop entered by the user exactly, so we return the frequency of the first bin and the bin size. If you need to calculate the frequency of any bin in the sweep, use the bin size and trace start frequency. The bbr file stores the user entered values so that we can display those nice round numbers on the UI when the user replays their sweep.

Let me know if you have follow up questions.

Regards,
A.J.