Tender invited for Development of Train Collision Avoidance System

ISO 9001: 2008 Effective from 18.06.2012 RDSO/SPN/196/2012 Version 3.1.1
Document Title : Specification of Train Collision Avoidance System
Communication Network
6.12. Each station/ IBS/ mid-section interlocked Gate/ Loco unit radio equipments
shall be as per specifications:
a. Shall be FCC certified
b. Shall possess RTS/CTS and DOX modes
c. Shall be capable RF Data Transfer in “Bitwise” / streaming Mode
d. RF frequency range: 405-512MHz
e. RF Channel Bandwidth : 25kHz
f. Modes of operation Full Duplex
g. Modulation : 2FSK
h. Operating frequencies :
1) Transmission by Station / Interlocked LC Gate / IBS : 466.8 MHz
2) Regular Transmission by Loco : 441.8 MHz
3) Additional Transmission by Loco dedicatedly for emergency : 466.8
MHz
i. Emission : according to 16K0F2D
j. Transmitter freq. stability : 1 ppm
k. Transmitter Turn-on time (Tx. Freq. stable)/ Channel Switching time: not
more than 15msec
l. Carrier Output Power: 1-10 w adjustable through software.
m. Receiver BER : 1 x 10 -6 or better at 25kHz Bandwidth
n. Receiver Adjacent Channel Rejection 70dB at 25kHz
o. Receiver Sensitivity: 35 micro-volts for 12 dB SINAD /
p. 1 x 10 -6 BER at -100 dBm Level for 19.2kbps
q. Interfaces: COM1, COM2 – RS485, dB-9, TNC Female (Tx/Rx), SMA
Female (Rx).
r. RS485 ports (COM2) shall be internally wired through built-in modem for
interfacing with Quad Cable Network. The modem shall support V.34 as
well as V.90 modulation as per ITU-T.
s. RF Impedance : 50 ohm
t. Power 10-30V, negative ground, snap & Lock 4-pin DC Power Jack
u. Set-up and Diagnostic features to be available through separate port DE-
9F.
v. Capable of being configured as Repeater.
w. Antenna Cable – Low loss Coaxial cable with 50Ω characteristic
impedance, suitable for UHF applications.
x. Antenna for station/ IBS/ mid-section interlocked Gate unit– It shall be
combination of vertically polarized omni and/ or directive antennae. The
antenna cable & antenna shall be suitable to provide a range of 3.5 Kms
radius of communication.
y. Radio modems connected through Hot-Standby Switch.
z. Height of the station antenna:
1) Above ground level : 40m Max.
2) Above top of building (in case
antenna is proposed to be installed
on the roof top of the building) : 4 m Max.
6.13. Station/ IBS/ Gate unit as well as Loco unit shall have hot standby radio for
higher availability.
6.14. The power output of the radio, antenna cable & type of antenna of Station/ IBS/
Gate unit shall be so adjusted/ selected that uninterrupted communication
between Loco unit’ & Station/ IBS/ Gate unit is available for minimum 3.5 Kms
in block section.
6.15. The Station / Interlocked LC Gates / IBS unit shall periodically transmit in a
manner not to cause clashing of signals from two such stationary units. The
Signal Directorate RDSO/Lucknow Page 25 of 56