Tektronix TDS 340A User Manual

Using the FFT
3–32
TDS 340A, TDS 360 & TDS 380 User Manual
always expressed in frequency/division with the beginning (left-most point) of
the waveform representing zero frequency (DC).
Normal waveform of an
impulse response
FFT waveform of the
magnitude response
Figure 3–21: System response to an impulse
Operation
To obtain an FFT of your waveform, do these basic tasks:
H Acquire and display it normally (that is, in the time domain) in your choice
of input channels.
H Transform it to the frequency domain using the math waveform menu.
H Use cursors or automated measurements to measure its parameters.
Perform the following steps to display an FFT math waveform:
1. Connect the waveform to the desired channel input and select that channel.
2. Adjust the vertical and horizontal scales and trigger the display (or press
AUTOSET).
The topic Offset, Position, and Scale, on page 3–37, provides in-depth
information about optimizing your setup for FFT displays.
Displaying an FFT

Tektronix TDS 340A Specifications

General

Brand	Tektronix
Model	TDS 340A
Category	Test Equipment
Language	English