<page_title> Time synchronization in North America </page_title> <section_title> Telephone time sources </section_title> <table> <cell> GPS <col_header> Time Signal </col_header> </cell> <cell> NMEA 0183 sentences, 1PPS signal. <col_header> Signal Format </col_header> </cell> </table>
GPS receiver with the NMEA 0183 GPZDA sentence a 1PPS signal.