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Analog Discovery 2 frequency accuracy


Carmine86

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Hi @Carmine86

The AD2 uses DSC1101, low jitter and high stability oscillator:
https://reference.digilentinc.com/reference/instrumentation/analog-discovery-2/reference-manual#clock_generator
http://ww1.microchip.com/downloads/en/DeviceDoc/20005613B.pdf

The AWG/Wavegen output is generated from lookup-table with fractional increment, so a wide range of frequencies (u-M) are very close to the requested one.
Here you can see some backward calculated frequencies from the increment, generated frequency considering ideal oscillator.
The generator accuracy is better than 1ppm.

image.png.5491d7b821577b8e67770199d598ba4f.png

image.png.b015031204f54164e800fe8cfa29b3c8.png

image.png.cfa0864daefe79ccd0ac1ecac0052e02.png

image.png.094ea34c4ad4c3ed8265727c5d177084.png

image.png.dea419c45bf51d7bf8b5e91e010ab313.png

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