Abstract: The present disclosure is directed towards systems and method for actively tuning a phase locked loop based on vibration excitation levels experienced by the phase locked loop. A bandwidth of the phase locked loop can be actively increased or decreased based upon a detected vibration level. In an embodiment, the phase locked loop includes a controllable oscillator, an output module, a filter module and a detector. The filter module can be configured to receive a bandwidth control signal to modify a bandwidth of the phase locked loop based on a vibration signal. In an embodiment, the vibration signal corresponds to a vibration level experienced by the phased locked loop. The detector can be configured to receive a PLL output signal from the output module and to receive a PLL input signal.

Abstract: The present disclosure is directed towards systems and method for actively tuning a phase locked loop based on vibration excitation levels experienced by the phase locked loop. A bandwidth of the phase locked loop can be actively increased or decreased based upon a detected vibration level. In an embodiment, the phase locked loop includes a controllable oscillator, an output module, a filter module and a detector. The filter module can be configured to receive a bandwidth control signal to modify a bandwidth of the phase locked loop based on a vibration signal. In an embodiment, the vibration signal corresponds to a vibration level experienced by the phased locked loop. The detector can be configured to receive a PLL output signal from the output module and to receive a PLL input signal.

Abstract: A frequency-agile frequency source. The frequency source includes an oscillator having an output and being configured to generate a signal at a first frequency at the output, a first direct digital synthesizer (DDS) having an output and a sampling clock input connected to the output of the oscillator, a filter amplifier block having an input directly connected to the output of the first DDS and an output, and a second DDS having a sampling clock input directly connected to the output of the filter amplifier block. The filter amplifier block is a substantially linear time-invariant element having a frequency response, the magnitude of the frequency response being at least 12 dB lower, at a second frequency within the first Nyquist zone of the first frequency, than at a third frequency above the first Nyquist zone of the first frequency.