Calculation method of 33250A Spurious (non-harmonic)

Frequently Asked Questions (FAQs)SummaryExplain how to calculate Spurious (non-harmonic) of 33250A.QuestionHow to calculate Spurious (non-harmonic) of 33250A?AnswerThe term “octave” means a doubling or halving of a frequency.  The origins of the term come from music, where a note played in one octave is half the frequency of the same note played in the next higher octave.   Think non-harmonic specifications as a line that is drawn on a chart.  From DC to 1 MHz there would be a flat line at -60 dBc, then at 1 MHz it jumps up to -50 dBc and stays there until 20 MHz.  From 20 MHz, you then draw a line that slopes up through the following key points: • 20 MHz = -50 dBc  • 40 MHz (double the frequency) = -44 dBc (add 6 dBc) • 80 MHz (double the frequency) =  -38 dBc (add 6 dBc)