Impedance calibration problem

Incognitoz · Jan 31, 2023

Hello, I have an RME ADI-2 DAC fs that I am amplifying the signal through the headphone amplifier & E1DA Cosmos ADC. I am trying to calibrate the system with a 22 ohm reference resistor. And we'll see in this message when I try to calibration by short cricuit. What am I missing doing wrong?
Thanks

John Mulcahy · Jan 31, 2023

With the test leads shorted together the measurement level should be very low, since the measurement input should be connected to ground through the test leads, but it is still reading -18 dBFS so something in the setup must be causing that high signal level. Make sure the E1DA is in stereo mode in case that is affecting the readings,

Incognitoz · Feb 1, 2023

John Mulcahy said:
With the test leads shorted together the measurement level should be very low, since the measurement input should be connected to ground through the test leads, but it is still reading -18 dBFS so something in the setup must be causing that high signal level. Make sure the E1DA is in stereo mode in case that is affecting the readings,

Thank you John for your quick answer.
I did what you suggested and now it works. Thank you

Impedance calibration problem

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