GW Instek GDS-2000 series Uer manual - Manual (Page 65)

MEASUREMENT
65
Flattop FFT
window Frequency resolution Not good
Amplitude resolution Good
Suitable for.... Amplitude measurement on
periodic waveform
Rectangular FFT
window Frequency resolution Very good
Amplitude resolution Bad
Suitable for.... Single-shot phenomenon
(this mode is the same as
having no window at all)
Blackman FFT
window Frequency resolution Bad
Amplitude resolution Very good
Suitable for.... Amplitude measurement on
periodic waveform
Addition/Subtraction/Multiplication
Panel operation 1. Activate the channel pairs.
4CH model: CH1&2, 3&4
2CH model: CH1&2
2. Press the Math key.
MATH
3. Press F1 (Operation)
repeatedly to select addition
(+), subtraction (–), or
multiplication (x).
Operation
+
F 1