Meteorcomm LLC 63030-24 ユーザーズマニュアル
ITCR Base Radio User's Guide
© 2013 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential
2
Do Not Distribute
5/8/2013
transmissions into three second superframes by using slotted TDMA in the majority
of the frame followed by collision sense multiple access (CSMA) in the remainder of
the frame. Packet radio messages are passed between Base and mobiles (primarily
locomotives but may also include maintenance equipment on the rails) and from
Wayside (rail monitoring and control points) stations. The Base radio is also in two-
way communication with the back office of the owner railroad company via its
ethernet LAN port. Back offices of owner railroads are also linked to support foreign
railroad traffic on a given railroad company’s track.
of the frame followed by collision sense multiple access (CSMA) in the remainder of
the frame. Packet radio messages are passed between Base and mobiles (primarily
locomotives but may also include maintenance equipment on the rails) and from
Wayside (rail monitoring and control points) stations. The Base radio is also in two-
way communication with the back office of the owner railroad company via its
ethernet LAN port. Back offices of owner railroads are also linked to support foreign
railroad traffic on a given railroad company’s track.
1.3 Chassis
Base radios are housed in electrically sealed metal cases. The Base radio fits within a
standard 19” rack mount and has a maximum depth of 24 inches and a height rack
of 4 RUs, weighing less than 25 lbs.
standard 19” rack mount and has a maximum depth of 24 inches and a height rack
of 4 RUs, weighing less than 25 lbs.
It contains fans with a temperature sensor that can be set to turn on at a
configurable temperature.
configurable temperature.
All input/output ports are grounded and/or shielded. In addition, best engineering
practices have been employed with respect to internal shielding, unit assembly and
PCB design in an effort to minimize potential sources of unwanted radiated
emissions.
practices have been employed with respect to internal shielding, unit assembly and
PCB design in an effort to minimize potential sources of unwanted radiated
emissions.
1.4 Ports and Ethernet Connectors
The Base radio supports two RJ45 Ethernet I/O ports, each on its own network.
1.5 Power Connectors
The Base radio has two studs (marked ‘+’ and ‘-‘) to support the connection of power
cables. See input power requirements further below.
cables. See input power requirements further below.
1.6 Antenna Connectors
The 50W PEP rated Base radio supports 50-ohm resistive loads using N-type
connectors for narrowband RF antenna(s), max VSWR 3:1. The connector marked
TX/RX should be routed to the transmit or transmit/receive antenna. The connectors
marked RX1 and RX2 are provided for optional use of separate receiving antennas.
connectors for narrowband RF antenna(s), max VSWR 3:1. The connector marked
TX/RX should be routed to the transmit or transmit/receive antenna. The connectors
marked RX1 and RX2 are provided for optional use of separate receiving antennas.