Advantageous GPS disciplining of the OSA BVA oscillator

This paper provides evidence of Quartzlock´s work in advantageously GPS disciplining an (OSA) BVA oscillator. Such disciplining by GPS of an (OSA) BVA quartz oscillator is a demanding task because the exceptional short term stability (8E-14/3...30s) and low phase noise (-130dBc/Hz at 1Hz) of the BVA OCXO must not be disturbed whilst at same time the natural drift (timescales of a day or more) of an OCXO must be corrected. This has been successfully achieved by Quartzlock by using multiple parameter controls in a modern DPLL (within the limits of GPS accuracy per day). Introduction (Heading 1).