Tektronix TDS200 Series User Manual

Math FFT
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TDS1000/2000-Series Digital Oscilloscope User Manual
Selecting an FFT Window
Windows reduce spectral leakage in the FFT spectrum. The FFT
assumes that the YT wave form re peats forever. Wi th an integral
number of cycles (1, 2, 3, ...), the YT waveform starts and ends at the
same amplitude and there are no discontinuities in the signal shape.
A non-integral number of cycles in the YT waveform causes the
signal start and end points to be at different amplitudes. The
transitions between the start and end points cause discontinuities in
the signal that introduce high-freque ncy transients.
Time-domain
(YT) waveform
Without windowing
FFT
Discontinuities
Center 2048
data points

Tektronix TDS200 Series Specifications

General

Channels	2 or 4
Memory Depth/Record Length	2.5k points
Input Coupling	AC, DC, GND
Timebase Accuracy	50 ppm
Display	5.7-inch color LCD
Vertical Resolution	8 bits
Trigger Modes	Edge, Video, Pulse
Math Functions	Add, Subtract, Multiply, FFT
Maximum Input Voltage	300 Vrms
Power Requirements	100-240 VAC, 45-66 Hz
Bandwidth	100 MHz
Vertical Sensitivity	2 mV/div
Timebase Range	5 ns/div
Connectivity	USB
Input Impedance	1 MΩ