Frequency Reference News Today

This small board converts a standard 10MHz frequency reference (eg, from an oscilloscope) to 1MHz and 1Hz square wave signals. The latter can emulate the 1PPS output of a GPS receiver and has options for a 10% or 50% duty cycle. by Nicholas Vinen

The GPS-Disciplined Oscillator (GPSDO) is built almost entirely in software, so it only requires a PIC, an oven-conditioned crystal oscillator and a few other supporting parts. It provides an extremely accurate 10MHz signal with an error in the parts per billion range. by Alan Cashin