Dac Distortion Measurements - Agilent Technologies 93000 SOC Series Training Manual

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DAC Distortion Measurements

DAC distortion is usually measured by sourcing a digital sine
wave. The analog response is first captured and then analyzed in
the frequency domain. This means, the processed waveform is
converted into its spectrum using the FFT algorithm, and the
calculations are based on the frequency components.
DAC distortion measurements include:
• Total harmonic distortion (THD)
• Signal-to-noise plus distortion (SND)
• Signal-to-noise ratio (SNR)
• Spurious free dynamic range (SFDR)
• Signal resolution
DAC Dynamic Parameters (Distortion)
THD, SND, SNR, and SFDR are defined and calculated in the same
way for DACs, ADCs and buffers.
Lesson 7 – Executing the DAC Distortion Test
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