© 2018 Time & Frequency Solutions Ltd

Disclaimer & privacy statements


MacGrgeor Welding Systems - UK Site

Tel : +44 1376 514114

Precision GPS/GNSS based NTP Network Time Servers


Time sources and signals

An overview of trusted time sources and common time code formats used to disseminate accurate time information.

Time sources and signals

Selecting an input source for your timing system is critical to the accuracy and reliability of the entire timing system.

We offer a comprehensive range of trusted time sources for timing system design.

Global Positioning System (GPS)

A constellation of 24 satellites each transmitting highly precise time signal used generally to accurately calculate speed and location information from Earth. Coverage is global, although reception of information from four or more satellites is required for accurate positional information.

Low Frequency (LF) Terrestrial Time Signals

MSF-60 :

An LF time signal originating from Anthorn, Cumbria, UK. The National Physical Laboratory (NPL) in Teddington is the body responsible for its dissemination and the maintenance of all time and frequency standards in the UK.

The time standard is GMT (Greenwich Mean Time) or BST (British Summer Time). Coverage includes most of north and west Europe.

Regular maintenance is scheduled throughout the year which means the MSF-60 signal will not be available during those times.

DCF-77 :

An LF Longwave time transmission from Mainflingen near Frankfurt in Germany. The time signal is CET (Central European Time) or CEST (Central European Summer Time) and has a range of about 2000km which covers most of Europe.

Other LF time signals include :

Timecodes :-

ASCII Serial – RS232, RS422 & RS485
IRIG (Inter-Range Instrumentation Group) A, B, D, E, G & H
NASA range of timecodes