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Radio-frequency (RF) signal generators are standard laboratory equipment anda wide-range of open-source and commercial devices exists to address their manyapplications. Nonetheless, only few expensive and proprietary solutions can bere-configured within a wide frequency band and triggered on a micro-secondtimescale. Such specifications are required for applications that use variableradio-frequencies to generate programmed mixed signals, to control processes orstates and to precisely steer laser beams using acousto-optical devices, tasksoften needed in industrial manufacturing, atomic and molecular physics ormicroscopy.  Here we present an open-source low-cost Arduino-based control system that canstore up to millions of commands received from a computer and then performreliable high-speed programming of an arbitrary device under its control (DUC)via a single- or quad-wire Serial Peripheral Interface. The softwarearchitecture operates as a real-time state machine, making it easily extensibleand adaptable to any DUC. Each configuration change can be triggered eitherexternally or internally, reaching ~1 MHz rates when using a Teensy 4.1Arduino-compatible board. Leveraging this flexible system, we developed aprogrammable four-channel RF signal generator, based on an Analog Devices 9959Evaluation board, and we demonstrated its capability and validated itsperformance.

Four-channel radio-frequency signal generator programmed by an  open-source Arduino-based control system via single or quad Serial Peripheral  Interface