Low Power HD CSAC GPSDO Time and Frequency Standard

The HD CSAC Low Power 10 MHz GPSDO has evolved out of the HD CSAC GPSDO, providing the same features as the HD CSAC GPSDO, but with enhanced operational capabilities and additional features. The HD CSAC LP has a radically different system design to reduce power consumption by more than 60%. It operates from a single +5 V supply and consumes as little as 0.42 W (typical) when in external 1 PPS locking or holdover mode with the GPS disabled. GPS-enabled operation is possible with less than 0.55 W power consumption. 

In addition to the features inherited from the HD CSAC GPSDO, the HD CSAC Low Power GPSDO adds features such as a 3.3 V CMOS 1 PPS output, a socketed CSAC for easy upgrading of the CSAC oscillator, a second TTL level serial port that can be operated independently of the RS-232 level serial port, and a low-power holdover mode that shuts-off the power supply to the GPS receiver when GPS reception is not required.