power_fftscope with less than 1/60 seconds of data
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Good day all,
I have captured data from an oscilloscope (tektronix). I have pre-processed the data to bring it into matlab with all positive time and the 'structure with time' format.
Because my max time is .01, I fake a 60hz signal by repeating the last value of my signal and concatenating a value of .0167 (>1/60). I then run the following process:
signal_thd = power_fftscope(signal);
signal_thd.fundamental = new_fudnamental;
signal_thd.time = signal_thd.time(1:end-1); % this removes my added t=.0167
signal_thd.signal.value = signal_thd.signals.values(1:end-1); % this removes my repeated last value
signal_thd = power_fftscope(signal_thd);
This seems to work well enough in that I get expected numbers for the harmonics I saw in my scope.
The question is this two part: 1) Is there a more effective way do the above procedure, ie preload the frequency? 2) Is there a way to determine subharmonics?
Thank you very much for your time, Byron
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