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VisualAnalog: Increasing AD9253 output data sample length doesn't seem to work past 65536

Thread Summary

The user is trying to increase the sample length to 524288 on the AD9253 eval board and HSC-ADC-EVALCZ through Visual Analog but encounters an issue where the waveform output appears to have 0s added after 65536 samples. The final answer explains that the HSC-ADC-EVALCZ has a FIFO depth of 64k, limiting the capture size to 64k samples.
AI Generated Content

Hello, I'm trying to evaluate the AD9253 eval board and HSC-ADC-EVALCZ through Visual Analog. The default FFT and Sample outputs seem to make sense. I'm using the eval board oscillator and feeding in a continuous 53 MHz sine wave. However, I want to increase the sample length from the default of 16384. I go to the "ADC Data Capture" element on the canvas and choose 524288 samples for Channel B, the one I'm measuring.

However, when I rerun the canvas (clicking the "Run" button), my "Samples" waveform output looks like this, as if 0s were added after those 65536 samples. Is the AD9253 eval board or HSC-ADC-EVALCZ preventing a higher record length?

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