What are the components required to use PPS synchronization?
The following items are needed in oder to use PPS synchronization: • You need a high precision signal that can be connected to the computer running NTP. Usual sources of such PPS signals are quality reference clocks that feature such an output. • Your operating system must support processing of PPS signals. Most operating systems that come with source code (such as Linux and FreeBSD) can be modified to support PPS processing. As a matter of fact someone else probably did it already so you just need to install and configure the software. Most operating systems supporting PPS do not only have some programming interface to read timestamps, but they also implement the NTP kernel clock model with special PPS processing options. See also Q: 5.2.4.3.. • The NTP software must also be configured to recognize and use PPS processing. Usually the software’s autoconfigure process will detect the presence of PPS processing capabilities. • Finally you should prepare your configuration file ntp.conf t
