Chapter 4 Calibration Procedures
Optional Performance Verification Tests
Distortion Verification
This test checks the Harmonic Distortion at selected frequencies and harmonics. This test requires the use of a spectrum analyzer with dynamic range, frequency range, and resolution bandwidth adequate for the measurement.
Select each function generator output in the table below. Use a spectrum analyzer connected to the function generator output. Set the fundamental frequency reference to 0 dB and measure the 2nd through 5th harmonic frequencies relative to this reference. This test is a 50W output termination test.
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Function | OUT 1 | Ampl | Freq | Fundamental | 2nd | 3rd | 4th | 5th | Value below |
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TERM | reference |
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Sine wave | 50 W | 1.1 Vrms | 20.00 kHz | reference | 40 kHz | 60 kHz | 80 kHz | 100 kHz | < 70 dB | ||
Sine wave | 50 W | 1.1 Vrms | 100.00 kHz | reference | 200 kHz | 300 kHz | 400 kHz | 500 kHz | < 60 dB |
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Sine wave | 50 W | 1.1 Vrms | 1.00 MHz | reference | 2 MHz | 3 MHz | 4 MHz | 5 MHz | < 45 dB |
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Sine wave | 50 W | 1.1 Vrms | 15.00 MHz | reference | 30 MHz | 45 MHz | 60 MHz | 75 MHz | < 35 dB |
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1Output termination set using front panel controls. HIGH Z assumes no load on output. 50W assumes a 50W – 0.1W load on output.
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