Extracting smaller signal from larger signal.

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Hi. I have attached an example wave of what I want to do (scaling is 8E-10). I have a sinusoid signal in a step function, and I want to sort of filter everything except the sinusoid signal (and then pad). I tried using x2pnt to find the location of the minimum, so that I could do wave[0,startindex-pulsetime/timestep]=0, but that gave me a negative value, which does not make sense with my scaling, because I start at time 0.

Is there a way to programatically extract the signal, so that Ionly have a padded sinusoid? pulse0.ibw (78.5 KB)
Manually you could drop the A and B cursors onto the trace, and do:
Duplicate/O/R=(hcsr(A),hcsr(B)) pulse0, sinusoid


If you want to extract the sinusoid progammatically you might try FilterFIR and a band-pass filter that passes the 10-30 Mhz range.

Low Pass:
End of Pass Band 30 MHz
Start of Reject Band: 35 MHz
Coefs: 601

High Pass:
End of Reject Band: 8 MHz
Start of Pass Band: 10 MHz
Coefs: 601


--Jim Prouty
Software Engineer, WaveMetrics, Inc.
FilterDialogBandPass.png (35.67 KB) PulseFiltered.png (13.02 KB)

August 11, 2016 at 11:17 am - Permalink