Fft Spectral Analysis; Math Menu; Fft Menu Description - Tenma 72-2650 Operating Manual

Table 2-2: Math Menu
Function Menu Settings
Type Math
Signal
CH1
source 1(F2)
CH2
+
–
Operator (F3)
×
÷
CH1
Signal source 2 (F4)
CH2

FFT spectral analysis

By pressing the F1 button again in mathematical
operation mode to enter FFT (fast fourier transform)
operation, the time domain (YT) signal can be converted
into frequency domain signal.
At FFT operation, it is convenient to observe signals
of the following types:
18
Description
Mathematic operation
You can select signal source
1 as CH1 or CH2
Signal source 1 + signal source 2
Signal source 1 - signal source 2
Signal source 1 × signal source 2
Signal source 1 ÷ signal source 2
You can select signal source
1 as CH1 or CH2
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
● Measure harmonic content and distortion in the system.
● Display noise characteristic in DC power supply.
● Analyse vibration.
Table 2-3: FFT Menu Description
Function Menu Settings
Type FFT
CH1
Signal source (F2)
CH2
Hanning
Hamming
Window (F3)
Blackman
Rectangle
Vrms
Vertical unit (F4)
dBVrms
Description
FFT mathematical operation
Set to select CH1 or CH2 as
waveform to be transform
Set to select Hanning,
Hamming, Blackman, or
Rectangle window function
Set vertical units as Vrms
or dBVrms