By inverse filtering, pre-compensation minimizes the effects of wiring imperfections and ensures that the signal applied to the device under test equals the signal designed on the HDAWG. Multiple filter types are available to correct for AC coupling, spurious inductances and capacitances, impedance mismatches, amplifier ringing, and others. This makes the HDAWG the only AWG on the market with real-time pre-compensation.
With the HDAWG-PC real-time pre-compensation option, each channel of the HDAWG is equipped with a chain of digital filters between the waveform generation unit and the digital-to-analog converter. Each filter can be individually enabled and configured in situ while monitoring the effect on the signal at the device under test, e.g. as displayed on an oscilloscope. The LabOne pre-compensation simulator allows users to match the measured signal with the simulated effect of the inverse filter and thus helps finding the right filter parameters quickly. Once this is done, users can proceed to work in the LabOne AWG Sequencer and rely on the visualized waveform data. The main application for the 4 and 8 channel HDAWG with the pre-compensation option are quantum computing application with flux bias pulses for superconducting qubits or gate voltage pulses for spin qubits. Other applications are EPR (electron paramagnetic resonance) or NMR (nuclear magnetic resonance).
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