1. A communications system comprising: a plurality of subsystems; a reference oscillator coupled to the subsystems, wherein the reference oscillator is configured to provide a reference signal to the subsystems; and a controller coupled to the reference oscillator and the subsystems, wherein the controller is configured to: receive, from a first subsystem in the plurality of subsystems, a request to change a characteristic of the reference oscillator; determine, based on a priority of the request, whether to process the request; initiate, in response to determining that the request should be processed, a reconfiguration of the reference oscillator to meet preferred requirements of the first subsystem.