Cryogenic RF Switch Driver
This device controls RF switches that are commonly used in dilution cryostats. The current pulses for the relay actuators can be tuned in length, current, rise and fall time to minimize heat load on the base-temperature stage. It features a touchscreen for local control and a SCPI interface via USB for remote control, e.g., with Python/Jupyter Notebooks. The pulse lines are isolated from Earth ground when not in use to any ground loop noise. It can control two SP6T RF switches, facilitating RF calibration or multi-experiment sessions in a cryogenic session.
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Features
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Two pulse output ports, 8 pin euro style connectors
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Each port can drive a SP6T latching RF switch
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Pulses are generated by an internal current source
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Current direction is switched to set or reset an RF port
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Pulses can be tuned in length, current, rise and fall time
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Pulse current, range: 0mA -- 750mA
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Pulse length, range: 1ms -- 200ms
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Rise and fall time, range: 1ms -- 8ms
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Gaussian rise and fall profile
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Pulse voltage compliance: 46V
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Required power supply: 48V, 50W minimum, with earth isolation
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Pulse lines are isolated from earth
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Pulse lines are isolated from device when not in use
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Touchscreen with user friendly GUI
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Serial SCPI interface via USB port
