an ASCII string (-IRIG, -GPS only). The Carriage Return character is transmitted on-time. The
format of the serial port data is shown below. To start the time transmissions send the
TYMSERVE a 'c' or 'C' character via the serial port. To stop the time transmissions send an 'r' or
'R' character. Refer to Chapter 4 for information on setting up the serial port protocol. Refer to
Chapter 5 for a description of the Serial Port connector.