Defence Products

Indian Railways’ Automated Train Protection System (IR-ATP) also known as Train Collision Avoidance System (TCAS) also called KAVACH (AE09) is a fail-safe, reliable, and easy-to-use 2 x 2oo2 architecture-based system.

Time Synchronization System Using Satcom

The main objective of the system design is to synchronize various network timing systems used by PGAD located at different places, with accuracy better than 2 micro seconds with reference to a reliable standard timing source.

The system design also aims at providing time synchronization at each location with in 25 microseconds from the reference, even when the reference is not available for more than 4 hours after initial synchronization period of 1 hour.

Specifications

of SLTG

Inputs

IRIG-B : IRIG-B data received from the satellite with level compatible to RS232 or RS422 or TTL.

1PPS : 1PPS signal received from Internal GPS receiver.

Outputs

1PPS Optically isolated 1PPS signal received from internal 12 CH GPS receiver or derived from reference with a level compatible to RS232/422 on our channels.

IRIG-B DC Optically isolated and path delay compensated (or time advanced) IRIG-B DC signal on four multimode fiber optic links (850nm, 9.2 dB link budget, ST connectors)

Series-3 D38999 – 6 Pin connector

230V AC +/- 10 % single-phase 50HZ +/- 3Hz or 28V+/-4V DC. Both are separately fused

Power

Indicators

Separate indicators for AC and DC power availability

GPS availability

Transmission and Reception of the IRIG-B DC signal

Enclosure 2U, 19” standard rack mountable unit

Manufacturing