The Xenith TBR (Model FTS500) is an OCXO based enclosed GPS disciplined clock and a suitable timing device for DVB, DAB, wireless communication infrastructures, time-stamping or any other critical ...

If you’re looking for a 1-second time reference, you’d probably just grab a GPS module off the shelf and use the 1PPS output. As demonstrated by [InazumaDenki], though, an old quartz clock module can ...