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'GPSTCXO' Project name is KHRONOS and for the HPSDR GPSDO - the project name is THEMIS. - We would like to see what the interest level is for a GPSTCXO based timing/frequency reference for HPSDR. Suggestions and discussions are welcome.

Schematics and Block Diagrams For Themis and Khronos:


THEMIS Design For Review

THEMIS Simplified Block Diagram

NEW THEMIS 3D PDF Of Layout (requires 3D plugin)

NEW THEMIS Pic of current Themis board with options.

KHRONOS (preliminary schematic release):

KHRONOS (Preliminary) Design For Review

KHRONOS Simplified Block Diagram


Current Board Screen shots (these will be available at various layout/development stages):

THEMIS Layout Snap Shot

KHRONOS Layout Snap Shot

Here's some reference material to review regarding the Jackson Labs GPSTCXO 'low cost' device:

GPSTCXO Data Sheet Brief


GPSTCXO Mechanical Dimensions

Excalibur's TCXO Data Sheet

Some File Updates:

PDF Schematic of EVB

GPSTCXO Eval Board Gerbers

GPSTCXO Eval Board Mechanical Dimensions

Image of Jackson Labs EVB:

GPSTCXO Jackson Labs EVB Image

Block Diagram of KHRONOS Architecture:

KHRONOS Block Diagram

Possible Gibraltar Alternative:

MTRON m9107 Datasheet

Some good background material and reference papers:

10 MHz OCXO Clock for the hpSDR-Transceiver - By Hans Hartfuss, DL2MDQ and Juergen Sachtleben, DD6UJS

Surplus 10 MHz Rubidium Frequency Standard - By Hans Hartfuss, DL2MDQ and Juergen Sachtleben, DD6UJS

An alternative design:

10 MHz Simple GPSDO - By James Miller G3RUH

Note - all files pertaining to the Jackson Labs GPSTCXO are provided courtesy of Jackson Labs of Los Gatos, California.