TDS2MM Measurement Module
TDS 200-Series Extension Module Instructions
41
Measuring FFT Waveforms Using Cursors
You can take two measurements on FFT waveforms: magnitude
(in dB) and frequency (in Hz). Magnitude is referenced to 0 dB,
where 0 dB equals 1 V RMS. You can use the cursors to take
measurements at any zoom factor.
Push CURSOR
Source and select Math. Push the Type menu
button to select between Magnitude and Frequency. Use the Vertical
Position knobs to move cursors 1 and 2.
Use horizontal cursors to measure magnitude and vertical cursors to
measure frequency. The menu boxes display the delta between the
two cursors, the value at cursor 1 position, and the value at cursor 2
position. Delta is the absolute value of cursor 1 minus cursor 2.
Magnitude cursors
Frequency cursors
You can also do a frequency measurement by using the Horizontal
Position knob to position a frequency component on the center
graticule line and read the frequency at the top right of the display.
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