GPSDO - GPS Disciplined Oscillator

I picked up one of these  BG7TBL 10MHz GPSDO units a few months ago to replace a borrowed Rubidium based 10 MHz reference unit.  Again this BG7TBL unit is 10 MHz sine reference, with GPS receiver input to lock it to GPS satellite time signals, so that this box provides NMEA 4800Baud data, plus 10 MHz signal, plus 1PPS signal to drive other devices.  There is even a smaller, lightweight unit available now for portable operation.

http://www.qsl.net/vk2kfj/gpsdo.html

GPS info - NMEA serial data and 1pps output

I have added a write up  regarding GPS boards for extracting NMEA serial data for APRS use  and also extra 1pps (1 Pulse Per Second) signal for use with providing GPS locking of 10 MHz Reference signal  (or other Reference frequencies) for providing an accurate and stable source, typically for locking a Local Oscillator source for a microwave transverter kit, or for other transceivers used  for doing weak signal digital modes, such as WSPR and WSJT.

http://www.qsl.net/vk2kfj/gps.html