The MD-013 ULTRA CLEAN GNSS Disciplined Oscillator Module features ultra-low phase noise and ultra-low Allan Deviation (ADEV). The module has an embedded 72-channel GNSS receiver for GPS, Galileo and GLONASS services, and it can be configured to use an external reference. The module’s ultra-low phase noise/ultra-low ADEV reference quartz crystal oscillator is disciplined to the external reference input’s GNSS receiver.