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sinara-hw / Phaser

Quad channel 1GS/s RF generator card with dual IQ upconverter and dual 5MS/s ADC and FPGA in EEM form factor
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DAC output termination resistors far away from DAC #120

Closed jordens closed 3 years ago

jordens commented 3 years ago

Should and can be much closer. Required and stressed multiple times in the datasheets. (The impedance between the DAC output and the resistors does not match the trace dimensions).

hartytp commented 3 years ago

Thanks @jordens

One thing I was curious about here is why we didn't follow the EVM for the DAC outputs.

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jordens commented 3 years ago

This is more for #110 It depends on the variant and on the impedance at the balun and also the series resistors before the balun.

gkasprow commented 3 years ago

Fixed obraz