GE Reason RT430, Technical Manual

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RT430
RT430-TM-EN-5 17
1. DESCRIPTION
1.1 Introduction
RT430 - GPS Grandmaster Clock is a clock referenced to GPS satellites, whose main application is to be a
source of temporal synchronization signals in different formats and protocols to synchronize internal clocks
of equipment and systems based on digital processing.
It has high accuracy (100 ns) and signal stability, even in situations where there is loss of GPS satellites.
Provides temporal synchronization for applications as synchrophasor measurement, traveling wave fault
location, and other applications.
The timing information presented on the front display of the RT430 can be referenced local or UTC time and
can be modified by the DST rules defined by the user.
It supports the following protocols sync time:

PTP (Precision Time Protocol) according to IEEE1588 standard, eliminating delay from message
processing which pass in other devices in the network;

NTP/SNTP;

IRIG-B004 (Demodulated);

IRIG-B124 (Modulated);

DCF77;

Serial Datagrams through the RS232 and RS422/485 serial ports.
This User Manual is structured as follows:
Chapter 1 presents the description of the RT430, its applications, technical characteristics and presentation
of the manual.
Chapter 2 shows how the RT430 should be installed considering the power, cable connection, sync outputs,
etc.
Chapter 3 shows the communication mechanisms to access monitoring and configuration interfaces of the
RT430.
Chapter 4 describes how the RT430 should be configured according to the options parameter of timing
sources and network parameters.
Chapter 5 shows how to operate the RT430, describing the local interface access and status indicators for
operation and remote monitoring.
Chapter 6 describes concepts and procedures to maintain the RT430.
Appendix A presents the format of the signals that compose the standard IRIG-B timing.
Appendix B presents the concepts of standard PTP synchronization (IEEE1588).
Appendix C presents the format of the synchronization signals based on Serial datagrams.