GW Instek GBS-1000 Series User Manual - Manual (Page 73)

MEASUREMENT
73
Math Operation
Overview
Background Math operation runs addition, subtraction,
multiplication, or FFT using the input signals and
shows the result on the display. The resulted
waveform characteristics can be measured using
the cursors.
Addition (+) Adds amplitude of two signals.
Channel pairs Channel 1 + 2, 3 + 4
Subtraction (–) Extracts the amplitude difference between two
signals.
Channel pairs Channel 1 – 2, 3 – 4
Multiplication (*) Multiplies amplitude of two signals.
Channel pairs Channel 1 * 2, 3 * 4
FFT Runs FFT calculation on a signal. Four types of
FFT windows are available: Hanning, Flattop,
Rectangular, and Blackman.
Channel Channel 1, 2, 3, 4
FFT rms Runs FFT rms calculation on a signal. Four types of
FFT windows are available: Hanning, Flattop,
Rectangular, and Blackman.
Channel Channel 1, 2, 3, 4
Hanning FFT
window Frequency resolution Good
Amplitude resolution Not good
Suitable for.... Frequency measurement on
periodic waveform