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diff --git a/ham/xanalyser/README b/ham/xanalyser/README new file mode 100644 index 0000000000..fac4533465 --- /dev/null +++ b/ham/xanalyser/README @@ -0,0 +1,21 @@ +XAnalyser is a program to analyse a stereo audio signal. It has two +displays: +Frequency Spectrum + +Using Fast Fourier Transform, the time domain of the signal is +transformed into the frequency domain, i.e. the amplitude (in +logarithmic scale) of the audio signal is plotted versus the +frequency. Either the sum of the left and right channel of the +audio signal can be shown or both channels simultaneously. + +XY Scope + +Roughly speaking, the audio signal of left channel deflects a +point horizontally and the right channel vertically (just as the +beam of a CRT would do). Thus, an audio signal only present on +the left channel produces a horizontal line, whereas an audio +signal only present on the right channel produces a vertical +line. A mono signal produces a 45 degree line. A stereo signal +creates a wilde pattern (if the phase is correct, predominately +in the same direction as a mono signal) or may even fill the entire +scope. |