Installation Instructions

New York City Transit
Réf. : Ed/Rév
Trad.: --
Mémo : Date : 01/28/2003
:00/02
DCS RF INSTALLATION INSTRUCTIONS
- 8 / 38 -
Siemens Transportation Systems exclusive property
4. RF measurement of system at 300 ft. This measurement will be performed using a RF Power Meter, 6
dB Horn antennas, and a 1.5-meter coaxial cable at a distance of 300 feet from the antenna (north &
south). These measurements will be made with the WRE in continuous transmit mode. The
measurements will be recorded in the RF Power Measurement Form at 300 Ft Column in Appendix F.
RF Power
Meter
Wayside Transmitter
Enclosure
For exact
configuration - See
Annex 1 - 4B
WRE placed in permanent
transmit mode (5 Sec TX)
1.5 Meter N to N
Phase Stable
Coaxial Cable
RF Detector for
RF Power Meter
Figure 5.5 - RF Measurement of WRE w/Antenna at 300 Ft.
6dBi Horn
Antenna - Astron
P2406
6, 9 or 13 dBi
Antenna
(depends on
configuration)
300 Feet
5. During the operational life of the RF system, these tests may be conducted in any order according to
maintenance activities or failure detection reports. For a specific antenna configuration, and WRE
configuration, there is a minimum attenuation in the coaxial cable system between the WRE and the antenna.
This is outlined in the Wayside antenna configuration guidelines.