Themis - An Open Source GPSDO For Open HPSDR
Maker Faire Bay Area 2019
MAKER
John Westmoreland
John Westmoreland's enthusiasm for GPSDO's began when looking for a solution for the Open HPSDR project. The Themis project demystifies the design and operation of GPSDO's and also lends itself to the study of time protocols; another interest area.
Themis is an Open HPSDR GPS disciplined oscillator (GPSDO) design that is an experimental approach for disciplining Crystal Oven (OCXO) OCXO's and provides 1PPS, 10MHz, and GPS Timestamping to the HPSDR Atlas Bus and can be used standalone.
What inspired you to make this project?:
When working on a solution for a GPSDO for the OpenHPSDR project; the first project that was designed was Khronos that in turn led to Themis. Themis is a grass-roots design regarding the disciplining of OCXO's and is suitable as a reference 10MHz clock as well as a time standard for Amateur Radio systems.
