Performance verification
Total Harmonic D istortion test
This test verifies the total harmonic distortion (THD) using a spectrum analyzer.
1. Connect the arbitrary function generator to the spectrum analyzer as shownin
the following figure.
Figure 12: Total Harmonic distortion tests
2. Set up the arbitrary function generator using the following steps:
Select menu Setting Operation
Function
Sine Sine (front)
Frequency 20.00 kHz
Frequency/Period (front)
Amplitude Units Vpp
TopMenu > Amplitude/Level Menu >
-more- > Units > Vpp
Amplitude 1.00 Vpp
Amplitude/High (front)
Channel 1 Output On On (front)
3. Set up the spectrum analyzer according to the following table:
Ce
nter Frequency
Sp
an
RB
W
100 kHz 200 kHz 500 Hz
4. Set the Ref Level of the spectrum analyzer to 8 dBm.
5. When the THD cannot be measured directly, it is obtained by using the
following calculation:
6. Measure and record each level (A1 to A7) to the seventh harmonics of the
20 k
Hz sine wave.
62 AFG3000C and AFG3000 Series Specifications and Performance Verification
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