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
î 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.