17-06-2013, 04:25 PM
INDUSTRIAL SEMINAR ON RDSO : TELECOMMUNICATION DEPARTMENT
TELECOMMUNICATION.pptx (Size: 631.8 KB / Downloads: 34)
Research- Design and Standards Organization
Basically RDSO has been established to perform following functions:
Development, adoption for new techniques and standardization of materials and products specially needed by Indian Railways.
Providing consultancy and inspection of critical and safety items of rolling stocks; locomotives, signalling and track components
OPTICAL FIBRE COMMUNICATION
It is a method of transmitting information from 1 place to another by sending pulse of light through optical fiber
ADVANTAGES:
Large bandwidth
Low attenuation
Signal security
Low cross talk
Immune to EM & RF interference
OPTICAL FIBER
Optical fiber is a transparent medium having at least two layer with different refractive index.
The main parts of optical fiber are:
Core
Cladding
Coating
It works on the principle of total internal reflection
DIGITAL CLOCK WITH GPS SYNCHRONIZATION
It covers technical requirement of digital clock with GPS synchronization which consist of master clock & digital clock suitable for platform & office area complex of Indian Railways
Format of office clock is HH:MM:SS
Format of platform clock is HH:MM
MASTER CLOCK
Master clock shall be used to synchronize digital clocks when wired in network. In such cases, digital clock will work as slave clock without any GPS receiver
Master clock can control up to 64 slave clocks
It synchronize time across all slave clocks
It can be in 12 or 24 hr format