Tektronix TPS2000 Series User Manual page 134

Math FFT
You can use the cursors to take measurements at any zoom factor. To
do so, follow these steps:
1. Push the CURSOR button to see the Cursor Menu.
2. Push Source
3. Push the Type option button to select between Magnitude and
Frequency.
4. Use the multipurpose knob to move cursors 1 and 2.
Use horizontal cursors to measure magnitude and vertical cursors to
measure frequency. The options 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.
You can also take a frequency measurement without using the
cursors. To do so, turn 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.
5- 12
FFT.
Magnitude cursors
TPS2000 Series Digital Oscilloscope User Manual
Frequency cursors