Agilent Technologies DSO-X 4022A, Руководство пользователя

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Math Waveforms
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Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 101
Use the X1 and X2 cursors to measure frequency values and difference
between two frequency values (
Δ
X). Use the Y1 and Y2 cursors to
measure amplitude in dB and difference in amplitude (
Δ
Y).
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To make other measurements, press the
[Meas]
key and set the
Source
softkey to Math N .
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 2.5 V, 100 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 - 40.0 dBV, Center
frequency to 500 kHz, frequency Span to 1 MHz, and window to Hanning.
See Also
• "FFT Measurement Hints" on page 102
• "FFT Units" on page 103