User`s guide

70 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
4 Math Waveforms
You can make peak-to- peak, maximum, minimum, and average dB
measurements on the FFT waveform. You can also find the frequency
value at the first occurrence of the waveform maximum by using the X
at Max Y measurement.
The following FFT spectrum was obtained by connecting a 4 V, 75 kHz
square wave to channel 1. Set the horizontal scale to 50 µs/div, vertical
sensitivity to 1 V/div, Units/div to 20 dBV, Offset to - 60.0 dBV, Center
frequency to 250 kHz, frequency Span to 500 kHz, and window to
Hanning.
See Also • "To perform a transform function on an arithmetic operation" on
page 64
• "FFT Measurement Hints" on page 71
• "FFT Units" on page 72
• "FFT DC Value" on page 72
• "FFT Aliasing" on page 72
• "FFT Spectral Leakage" on page 74
• "Units for Math Waveforms" on page 74