User's Manual

COMTRAC RADIO
USER MAUAL
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Business Identifier
DTC
Revision
9950-15900
3CU 04036 0026 PCZZA
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12.1 Wayside Radio Unit
The WRU is positioned along the guideway. Spacing and placement is determined by
an RF survey to ensure continuous overlapping RF coverage.
The ComTrac radio standalone variant can be housed in an outdoor rated enclosure,
along with an AC/DC power supply and bandpass filter.
Alternatively, the die-cast variant can be deployed on its own. It contains the AC/DC
power supply and bandpass filter.
Typical antenna is the Andrew Flat Planar Array Microceptor, QD-2402, with 16 dBi.
Typical two antenna system is show below.
WRU
RF Cable
Surge
Arrestor
1 2
Splitter
S
Antenna
Figure 4 Access Point Radio Installation – Two Antennas
Typical four antenna system, servicing different tracks (areas), is show below.
WRU
RF Cable
Surge
Arrestor
1 2
Splitter
S
1 2
Splitter
S
W
A
L
L
1 2
Splitter
S
Antenna
Antenna
Pad
Figure 5 Access Point Radio Installation – Four Antennas