RF reference generation for the Ground Test Accelerator

A description is presented of the implementation plan for the radio-frequency (RF) reference generation subsystem of the Ground Test Accelerator (GTA). The master oscillator and most of the required components of this subsystem have been acquired and tested. Hardware descriptions and test results are cited when available. Each GTA control subsystem requires a coherent, phase-stable signal from the RF reference generation subsystem to regulate the RF field in its corresponding cavity of the accelerator. The RF reference generation subsystem is configured in a star-distribution format, originating at a master oscillator that supplies three phase-coherent frequencies harmonically related to a fixed fundamental. Phase-locked loops and Wilkinson splitters distribute these signals to many different output ports.<>