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GPS Grandmaster Clock

RT430-TM-EN-5

Appendix D presents the considerations used by RT430 to compensate delays inserted by the cable length

of the GPS antenna.

Appendix E gives some architectures implementing the RT430 as a source of timing for different electronic

devices.

1.2 Foreword

This technical manual provides a functional and technical description of Alstom Grid's RT430, as well as a

comprehensive set of instructions for using the device. We have attempted to make this manual as accurate,

comprehensive and user-friendly as possible. However we cannot guarantee that it is free from errors. Nor

can we state that it cannot be improved. We would therefore be very pleased to hear from you if you

discover any errors, or have any suggestions for improvement. All feedback should be sent to our contact

centre via the following URL:

http://www.alstom.com/grid/contactcentre/

1.3 Key Features

 100 ns accuracy;

 Temporal synchronization reference through GPS antenna and PTP server input;

 PTP temporal synchronization protocol according to IEEE1588-2008 standard;

 PTP profile option, according to IEEE C37.238 standard;

 High accuracy internal oscillator system;

 Time signals in IRIG-B004, IRIG-B124, or DCF77 format;

 Pulses: 100 pulses-per-second, 1 pulse-per-second, 1 pulse-per-minute;

 Freely configurable low frequency pulse generator from 1 pulse-every-60-seconds to 1 pulse-every-

24-hours;

 Pulse on-time with daily repetition;

 User-configurable rules for daylight-saving-time and configurable time zone;

 Delay compensation for GPS antenna cables;

 NTP/SNTP server using Ethernet port;

 Status monitoring using SNMP;

 Configurable over Ethernet using Web Interface;

 RS232 and RS422/485 serial ports with frequency variable pulse and datagram subject to user

definitions;

 4 independent Ethernet network outputs 10/100Base-T for configuration and access to the

equipment;

 2 electrical outputs with screw connectors (one of them is insulated) with an individual supply

capacity up to 150 mA, TTL level, normal or reversed polarity, and singly programmable output

signal;

 2 electrical outputs with BNC connectors (one of them is insulated) with an individual supply capacity

up to 150 mA, TTL level, normal or reversed polarity, and singly programmable output signal;

GE Reason RT430 User Manual

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