CalAmp ITC 220 User Manual
ITC 220 Base Station, Locomotive & Wayside
RADIO TRANSCEIVER FOR RAILROAD PTC
Field Service Guide
ITC 220 Transceivers
PN 0046300120 Rev. A
Revised August 2012
REVISION HISTORY
REV
DATE
REVISION DETAILS
A
August 2012
Initial release. Part number 0046300120.
Important Notice
Radio Transceiver Model
Antenna application
Section and applicable table
ITC 220 Base Station Transceiver
Fixed installation
Section 6 Fixed Installations; Table 2 on Page 5
ITC 220 Locomotive Transceiver
Mobile installation
Section 4 Mobile Installations; Table 1 on Page 3
ITC 220 Wayside Transceiver
Fixed installation
Section 6 Fixed Installations; Table 2 on Page 5
ITC 220 Wayside Transceiver
Mobile installation
Section 4 Mobile Installations; Table 1 on Page 3
Because of the nature of wireless communication, transmission and reception of data can never be
guaranteed. Data may be delayed, corrupted (i.e. have errors), or be totally lost. Significant delays or losses
of data are rare when wireless devices such as CalAmp provides are used in a normal manner with a wellconstructed network. These products should not be used in situations where failure to transmit or receive
data could result in damage of any kind to the user or any other party, including but not limited to personal
injury or death, or loss of property. CalAmp accepts no responsibility for damages of any kind resulting from
delays or errors in data transmitted or received using the ITC 220 Base Station, Locomotive, or Wayside
Transceiver, or for failure to transmit or receive such data.
Copyright Notice
© Copyright 2012 CalAmp. All rights reserved.
Products offered may contain software proprietary to CalAmp or other parties. The offer of supply of these
products and services does not include or infer any transfer of ownership. No part of the documentation or
information supplied may be divulged to any third party without the express written consent of CalAmp.
CalAmp reserves the right to update its products, software, or documentation without obligation to notify
any individual or entity. Product updates may result in differences between the information provided in this
manual and the product shipped. For access to the most current product documentation and application
notes, visit www.calamp.com.
RF Exposure Compliance Requirements
The ITC 220 Base Station, Locomotive, and Wayside Transceivers are intended for use in the
railroad industry as Interoperable Train Control (ITC) Radio (ITCR), which is an important
component of Positive Train Control (PTC). The ITC 220 Base station, Locomotive, and
Wayside Transceiver units must be professionally installed and must ensure a minimum
separation distance between the antenna or radiating structure and any person. Refer to
Table 1 and 2 on pages 3 and 4 of the RF Energy Exposure Guide for ITC 220 Base Station,
Locomotive, and Wayside Transceivers Installed in Vehicles or at Fixed Sites for
recommended minimum lateral distance, as applicable for the antenna application, type of antenna, and
transmitting power.
It is the responsibility of the user to guarantee compliance with the FCC MPE regulations when operating this
device in a way other than described above. The installer of this equipment must ensure the antenna is
located or pointed such that it does not emit an RF field in excess of Health Canada limits for the general
population.
ITC 220 Base Station, Locomotive, and Wayside Transceivers use a low power radio frequency transmitter.
The concentrated energy from an antenna may pose a health hazard. People should not be in front of the
antenna when the transmitter is operating.
Recommended safety guidelines for the human exposure to radio frequency electromagnetic energy are
contained in the Canadian Safety Code 6 (available from Health Canada), the Federal Communications
Commission (FCC) Bulletin 65 and the Council of the European Union’s Recommendation of 12 July 1999 on
the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz) (1999/519/EC).
Any changes or modifications not expressly approved by the party responsible for compliance (in the
country where used) could void the user’s authority to operate the equipment.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page i
TABL E OF CONTENTS
1 Overview ......................................................................................................................................... 1
1.1 General Description ............................................................................................................................................... 1
1.2 Operational Characteristics .................................................................................................................................... 2
1.3 Physical Description ............................................................................................................................................... 4
1.3.1 Base Station Transceiver ............................................................................................................................... 4
1.3.2 Locomotive Transceiver ................................................................................................................................ 7
1.3.3 Wayside Transceiver ..................................................................................................................................... 8
2 Follow Established Safety Guidelines ........................................................................................... 13
2.1 Electrical Safety .................................................................................................................................................... 13
3 Important Information for the User ............................................................................................. 13
3.1 Transmitter Warm-up Period (Base Station Transceiver Only ............................................................................. 13
3.2 Limiting RF Exposure ............................................................................................................................................ 13
3.3 Fixed Antenna Guidelines .................................................................................................................................... 14
3.4 RF Interference to Residential Receivers ............................................................................................................. 14
3.5 Equipment Modifications ..................................................................................................................................... 15
4 Transmitter Operation .................................................................................................................. 15
4.1 Transceiver Channelization And Frequency Range .............................................................................................. 15
4.2 Base Channel Restrictions .................................................................................................................................... 15
4.3 Transceiver-Radiated Power Limits ...................................................................................................................... 15
5 Transceiver Service ....................................................................................................................... 18
5.1 Recommended Equipment .................................................................................................................................. 18
5.2 Routine Maintenance........................................................................................................................................... 19
5.3 Visual Inspection .................................................................................................................................................. 21
5.3.1 Confirm SD Memory Card (CIM) is Installed and Seated ............................................................................ 21
5.3.2 LED Diagnostics ........................................................................................................................................... 21
5.4 Configure Computer Ethernet Ports to Communicate with the Transceiver ....................................................... 22
5.4.1 To Configure the Computer Ethernet 1 Interface for Communication with the Transceiver MAINT Port . 23
5.4.2 To Configure the Computer Ethernet 2 Interface for Communication with the Transceiver LAN Port ...... 25
5.4.3 Creating an XtermW Connection Profile ..................................................................................................... 28
5.4.4 Verify That the MAINT and LAN Ethernet Ports Are Operational ............................................................... 29
5.5 Review the Power On Self-Test (POST) Results .................................................................................................... 30
5.6 Verify Front Panel LEDS Are Operational (All Transceiver Types) and Verify Cooling Fans Are Operational (Base
Station Transceivers Only) ................................................................................................................................... 30
5.6.1 Verify All Front-Panel LEDs Are Operational ............................................................................................... 30
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide 0046300120 Rev. A | Page ii
5.6.2 Verify Cooling Fans Are Operational (Base Station Transceivers Only) ...................................................... 32
5.7 Verify Settings That Allow the Transceiver to Transmit ....................................................................................... 33
5.7.1 Verify Transceiver Calibration Is Locked ..................................................................................................... 33
5.7.2 Verify the Transceiver is Commissioned ..................................................................................................... 34
5.8 Determine and Verify or Set GPS Coordinates (Base Station and Wayside Transceivers Only) .......................... 35
5.9 Transceiver Test and Adjustment Procedures ..................................................................................................... 35
5.9.1 Required Equipment ................................................................................................................................... 35
5.9.2 Measure and Adjust Peak RF Power Output ............................................................................................... 36
5.9.3 Measure Full-Rate Receiver Sensitivity ....................................................................................................... 46
5.9.4 Put a Trace On a Feature ............................................................................................................................ 48
5.10 Managing Software Application Images .............................................................................................................. 50
5.10.1 Determining Software Image Status ........................................................................................................... 51
5.10.2 Updating Software Images.......................................................................................................................... 52
5.10.3 Rolling Back an Image ................................................................................................................................. 56
5.10.4 Maintaining Multiple Software Images in the Transceiver ......................................................................... 58
6 Troubleshooting ............................................................................................................................ 60
6.1 Guidelines for Troubleshooting Common Problems ............................................................................................ 60
6.2 Power Problems ................................................................................................................................................... 61
6.3 SD Memory Card Problems .................................................................................................................................. 61
6.4 Antenna Problems................................................................................................................................................ 62
6.5 Transmission Problems ........................................................................................................................................ 63
6.6 Reception Problems ............................................................................................................................................. 64
6.7 Ethernet Connectivity Problems .......................................................................................................................... 64
6.8 RF Link Problems .................................................................................................................................................. 65
6.9 A Remote Transceiver Does Not Establish an RF Connection to the Base Station Transceiver ........................... 66
APPENDIX A — Abbreviations and Definitions ................................................................................... 68
APPENDIX B — Possible RF Antenna Configurations .......................................................................... 70
B.1 Base Station Transceiver ........................................................................................................................................... 70
B.2 Locomotive Transceiver ............................................................................................................................................ 71
B.3 Wayside Transceiver ................................................................................................................................................. 71
APPENDIX C — Block Diagrams ........................................................................................................... 72
C.1 Base Station Transceiver ........................................................................................................................................... 72
C.2 Locomotive Transceiver ............................................................................................................................................ 73
C.3 Wayside Transceiver ................................................................................................................................................. 73
APPENDIX D — Transceiver Cables ..................................................................................................... 75
D.1 Transceiver Power Cables ......................................................................................................................................... 75
D.1.1 Base Station Transceiver Power Cable .............................................................................................................. 75
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page iii
D.1.2 Locomotive Transceiver Power Cable ............................................................................................................... 76
D.1.3 Wayside Transceiver Power Cable .................................................................................................................... 76
D.2 Ethernet Cables ........................................................................................................................................................ 77
Base Station and Wayside Transceiver Ethernet Cables............................................................................................. 77
Locomotive Transceiver Ethernet Cable ..................................................................................................................... 77
APPENDIX E — GPS Satellite Constellation Overview and Antenna Planning Considerations ........... 79
E.1 GPS Satellite Constellation Overview ........................................................................................................................ 79
E.2 GPS Antenna Planning Considerations ...................................................................................................................... 79
E.2.1 Minimize Potential of GPS Antenna Issues ........................................................................................................ 80
E.2.2 Determine GPS Coordinates .............................................................................................................................. 81
APPENDIX F — Sample POST Results Typical for Properly Functioning Transceivers ........................ 84
APPENDIX G — Program Signal Generator for DQPSK ....................................................................... 87
G.1 Program Agilent E4438C to Test Transceivers with Sprints 18 to 23.02b ................................................................ 87
G.2 Program Agilent E4438C to Test Transceivers with Sprint 23.03 and Upward ........................................................ 89
G.3 Program F4438C Signal Generator for MSGPS (Multi-Satellite GPS) ........................................................................ 91
APPENDIX H — Forward Error-Correction Data-Packet Format Table ............................................... 92
APPENDIX I — Command Security ...................................................................................................... 93
I.1 Log On To the Transceiver ......................................................................................................................................... 93
I.2 Log Off From the Transceiver ..................................................................................................................................... 94
I.3 Change Your Transceiver Password ........................................................................................................................... 94
I.3.1 Forget Your Password? ....................................................................................................................................... 95
APPENDIX J — Commonly Used Diagnostic Commands ..................................................................... 96
INICHECK ..................................................................................................................................................................... 96
LINKSTAT ..................................................................................................................................................................... 96
REV ............................................................................................................................................................................. 97
STAT,RF ....................................................................................................................................................................... 97
STAT,HRX ..................................................................................................................................................................... 98
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page iv
1 OVERVIEW
This ITC 220 Radio Transceiver Field Service Manual provides important electrical safety and radio-frequency
compliance information, and field service information for CalAmp ITC 220 Base Station, Locomotive, and Wayside
Transceivers.
This manual provides essential information for personnel who perform the following on ITC 220 Radio Transceivers,
including:
Field Service maintenance, minor repair, or replacement
Verification or transceiver operation, software settings, and radio characteristics
Advanced troubleshooting
Prerequisites for users of this manual who perform the above include:
Ability to work with standard radio-frequency (RF) test equipment, including knowledge of how to prevent personal
injury and equipment damage.
Ability to measure RF power, frequency, and other quantities, and analyze RF performance.
Working knowledge of the XtermW terminal emulation application that is used to configure and install updates in
the radio transceivers.
Familiarity with means to limit RF exposure from antennas and familiarity with the RF Energy Exposure Guide for ITC
Base Station, Locomotive, and Wayside Transceivers Installed in Vehicles or at Fixed Sites.
Familiarity with installation procedures in the Installation Guides for the Base Station, Locomotive, and Wayside
Transceivers.
Related Documents
Other documents related to this ITC 220 Radio Transceiver Field Service Guide include:
ITC 220 Base Station Transceiver Installation Guide; CalAmp PN 133991
ITC 220 Locomotive Transceiver Installation Guide; CalAmp PN 133971
ITC 220 Wayside Transceiver Installation Guide; CalAmp PN 133981
RF Energy Exposure Guide for ITC 220 Base Station, Locomotive, and Wayside Transceivers Installed in Vehicles or at
Fixed Sites; CalAmp PN 134069
Because installation of each type of radio transceiver is covered in the above-listed Installation Guides, installation
instructions are not repeated in this Field Service Guide. This Field Service Guide covers field service and advanced
troubleshooting topics beyond the scope and purpose of the Installation Guides.
1.1 GENERAL DESCRIPTION
Positive Train Control (PTC) is a technology solution that prevents train-to-train collisions, over-speed derailments,
movement of a train through a switch left in the wrong position, and incursion of trains into maintenance of way work
limits. Interoperable Train Control (ITC) defines industry-standard messaging and communication protocols that
support PTC and ensure interoperability between components.
CalAmp’s line of ITC 220 Radio Transceivers for locomotive, base station, and wayside applications are manufactured
specifically for use by North American Railroads for PTC applications. Operating between 217.6 to 222 MHz, these
multi-channel software-defined radio transceivers meet railroad requirements for ITC and are designed to meet
relevant railroad specifications for operation in the harshest environments. With high power capacity, CalAmp’s ITC
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 1
220 Radio Transceivers provide wireless packet data transport between locomotives, base stations, and wayside
locations.
Base Station Transceivers are installed at fixed locations and provide RF connectivity between back office and remote
applications. The backhaul between the Base radio transceiver and the Back Office is typically in the range of 56 kbps to
1 Mbps. Base Station Transceivers provide radio coverage to all wayside and operational locomotive transceivers in the
system.
Locomotive Transceivers are remote radios installed in the cab of locomotives and are the mobile element of the ITC
220 network. A Locomotive Transceiver communicates with the Back Office through a Base Station over a 220 MHz RF
link. Te establish this link, a Locomotive transceiver registers with the Base transceiver. As long as the Base is the best
link available, the locomotive will continue to communicate with the Back Office through that Base.
Wayside Transceivers are typically installed at waysides as remote, fixed location radios. In this application they provide
wayside signal status, switch position, and track integrity information to locomotives and must communicate with
locomotives even when there is no Base Radio coverage. Wayside radios enable wayside sites to communicate with the
Back office for maintenance and other purposes. Some wayside radios may have access to the Back Office through a
broadband connection.
The Base Station Transceiver, Locomotive Transceiver, and Wayside Transceiver form the transportation backbone on
which a messaging application provides communication capabilities between railroad assets and their back offices.
ITC 220 Base Station, Locomotive, and Wayside Transceivers are designed to meet the following specifications:
AAR Standard S-5702
ANSI/TIA-603-C-2004
MIL-STD-810E
1.2 OPERATIONAL CHARACTERISTICS
ITC 220 radio transceivers are designed to satisfy industry-standard ITC requirements as part of an integrated 220 MHz
radio (ITCR) network supporting the implementation of PTC systems. These transceivers are designed to provide
communication in an interoperable fashion enabling messages to occur across railroad boundaries.
Base Station Transceivers are available in two configurations, one of which requires +24 VDC nominal input power, and
the other requires +48 VDC nominal input power. Both models are almost identical, with the exception of their nominal
input power requirements.
ITC 220 radio transceivers have the following operational characteristics, with differences noted where they appear for
each of the three types of transceivers, and for +24 VDC and +48 VDC models of the Base Station Transceivers.
(Specifications are subject to change without notice.)
General
Frequency Range: 217.6-222.0 MHz
Channel Spacing: 25 kHz
Temperature Range: Operating: Base Station: -30°C to +70°C; Locomotive & Wayside -40°C to +70°C
Storage: -55°C to +85°C (Base Station, Locomotive & Wayside)
Operating Humidity: 0 - 95% non-condensing
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 2
Frequency Stability: Base Station: +/- 0.1 ppm over operating temperature range;
Locomotive & Wayside: +/- 1.5 ppm over operating temperature range
DC Input Voltage Base Station 48 V model: 42-54 VDC; Damage limit 60 VDC
Base Station 24 V model: 21-27 VDC; Damage limit 30 VDC
Locomotive: 45–100 VDC, Damage limit 120 VDC
Wayside: 10.9–15.5 VDC, Damage limit 17 VDC
DC Current Draw: Base Station 48 V model: Transmit: 6 A (peak) max. into 50 ohm load; 4 A typical;
Receive: 0.6 A max. while receiving
Base Station 24 V model: Transmit: 11 A (peak) max. into 50 ohm load; 7.5 A typical;
Receive: 1.2 A max. while receiving
Locomotive: Transmit: 4 A (peak) max. into 50 ohm load, 1.8 A typical;
Receive: 0.5 A max. while receiving
Wayside: Transmit 10 A (peak) max. into 50 ohm load, 7.5 A typical;
Receive: 1 A max. while receiving
DC Power Connector: Base Station: Threaded 5/16-18 studs for ring lug connection
Locomotive: MS 3102 A18-4P or equivalent
Wayside: Wago p/n 231-833/001-000
Size: Base Station: 19.2 in. width × 17.8 in. depth × 7 in. height (4U)
(Occupies 5U max. when installed with a vented shelf in a 19" EIA rack)
Locomotive: 6.2 in. (5×MCU) width × 12.8 in. depth × 9.2 in. height
(Occupies 5×MCU when installed in an LSI rack)
Wayside 15.5 in. width × 9.5 in. height × 2.0 in. depth
(Lugged back-plate allows mounting to 19" EIA rack horizontal bars)
Weight: Base Station: 27 lbs. (12 kg) approximate; <40 lbs. (18 kg) rack w/vented shelf
Locomotive: < 22 lbs. (10 kg)
Wayside: < 8 lbs. (5.5 kg)
Antenna Connector: Base Station: Three (3) Type N female: One (1) TX/RX (single antenna install), One (1)
RX1 (multi-antenna RX only), One (1) RX2 (diversity RX only)
Locomotive: Two (2) Type N female: One (1) TX/RX1 (transmit / primary receive), One
(1) RX2 (diversity)
Wayside: One (1) Type N female (TX/RX, no diversity support)
GPS Receiver: Base Station & Wayside: Active or passive antenna; Antenna power: 3.3 V 50 mA max;
Antenna connector: TNC female
Locomotive: None (GPS function is separate from the ITC 220 Locomotive Transceiver)
External Interface: Base Station & Wayside: Two (2) Ethernet 10/100 Mbps: One (1) data network port,
RJ-45; One (1) maintenance port, RJ-45
Locomotive Two (2) Ethernet: One (1) data network port, M12 – 8 pin
female; One (1) maintenance port, M12 - 8 pin female
Configuration Interface Module (CIM): SD Card
Display: Activity and diagnostic LEDs on front panel
Regulatory: Base Station & Locomotive: Complies with FCC Parts 2, 15, and 90;
Industry Canada SRSP-512
Wayside: Complies with FCC Parts 2, 15, and 90
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 3
Transmitter
RF Power Output: Base Station: 75 W PEP; adjustable to 10-75 W PEP
Locomotive: 50 W PEP; adjustable to 15-50 W PEP
Wayside: 25 W PEP; adjustable to 7.5-25 W PEP
Output Impedance: 50 ohms; Operating VSWR < 3:1
Modulation Waveforms: Base & Locomotive: 16 kbps pi/4DQPSK (linear); 32 kbps pi/4DQPSK (linear)
Wayside: 16 kbps pi/4DQPSK (linear)
Occupied Bandwidth: Meets 47CFR90.210 (f), five aggregated channels
Modulation Designators: Base & Locomotive: 16 kbps: 8K90DXW; 32 kbps: 17K8DXW
Wayside: 16 kbps: 8K90DXW
Conducted Spurious Emissions: – 25 dBm max.
Max. Duty Cycle Rating: Base Station: 50 %
Locomotive: 30 %
Wayside: 10 %
Receiver
Maximum Usable Sensitivity, Static BER<10-4: 16 kbps -111 dBm; 32 kbps -108 dBm
Adjacent Channel Selectivity: 70 dB at 25 kHz offset
Spurious Response Rejection: 70 dB
Intermodulation Response Rejection: 65 dB
High Input Level (-7 dBm) Locomotive only: BER < 10-4
Blocking (1 MHz offset) 80 dB
Number of Simultaneous Receiver Channels:
Base Station (24V & 48V) and Locomotive: Sixteen (16) paired as: eight (8) diversity;
seven (7) 16 kbps; one (1) auto 16 kbps/32 kbps
Wayside: Two (2) (no diversity support): One (1) 16kbps;
one (1) auto 16 kbps/32 kbps
1.3 PHYSICAL DESCRIPTION
1.3.1 BASE STATION TRANSCEIVER
The ITC 220 Base Station Transceiver is housed in a 4 unit-height (allow 5 unit height to mount with a vented shelf
underneath), 19-inch rack-mountable sheet metal chassis. Repositionable brackets allow for mounting the chassis in
forward or mid-plane positions in 19-inch channel-rack installations.
1.3.1.1 BASE STATION TRANSCEIVER DIMENSIONS
Overall dimensions of the ITC 220 Base Station Transceiver are 19.15 in. width × 17.74 in. depth × 6.96 in. (4U) height,
as shown in Figure 1, which follows.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 4
Figure 1 ITC 220 Base Station Transceiver overall dimensions
(Dimensions shown are in inches.)
Reconfigurable mounting brackets allow the Base Station Transceiver to be front mounted or mid mounted in EIA 19"
rack applications. Dimensions of the unit as mounted in either of these configurations are shown in Figure 2 below.
(Dimensions shown are in inches.)
Figure 2 Base Station Transceiver overall dimensions in front mount and mid mount configurations in EIA 19" rack
1.3.1.2 BASE STATION TRANSCEIVER CONNECTIONS
All physical connections and interfaces are located on either the front or rear panel of the Base Station Transceiver.
1.3.1.2.1 BASE STATION TRANSCEIVER FRONT PANEL CONNECTIONS
The following figure and table illustrate the interface connections on the front panel of the Base Station Transceiver.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 5
Figure 3 Base Station Transceiver front panel interface connections
Interface
Connector Type
Label
Maintenance Ethernet
RJ-45
MAINT
CIM socket
SD memory card receptacle
CIM
Table 1 Base Station Transceiver front panel interface connections
1.3.1.2.2 BASE STATION TRANSCEIVER REAR CONNECTORS
The following figure and table illustrate connectors at the rear of the Base Station Transceiver.
Figure 4 Connectors at rear of Base Station Transceiver
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 6
Table 2 Connectors at rear of Base Station Transceiver
Interface
Connector Type
Label
TX Antenna
Type N female
TX/RX
RX1 Antenna
Type N female
RX1
RX2 Antenna
Type N female
RX2
GPS Antenna
TNC female
GPS
DC Power Input
Threaded posts (studs) for ring lug connection
+24 VDC or
+48 VDC
Data Network Ethernet
RJ-45
LAN
Ground connection
Threaded post (stud) for ring lug connection
1.3.2 LOCOMOTIVE TRANSCEIVER
The ITC 220 Locomotive Transceiver is housed in a 5×MCU LSI rack-compatible chassis.
1.3.2.1 LOCOMOTIVE TRANSCEIVER DIMENSIONS
Overall dimensions of the ITC 220 Locomotive Transceiver are 6.2 in. width × 9.2 in. height × 12.8 in. depth, as shown in
Figure 1 , which follows.
Figure 5 ITC 220 Locomotive Transceiver overall dimensions
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 7
(Dimensions shown are in inches.)
1.3.2.2 LOCOMOTIVE TRANSCEIVER CONNECTIONS
Interface
Connector Type
Label
TX/RX1 Antenna
Type N female
TX/RX1
Diversity RX Antenna
Type N female
RX2
DC Power Input
MS-3102 A18-4P or equivalent
74 VDC PWR IN
Data Network Ethernet
M12 - 8 pin female, A-coded
LAN
Maintenance Ethernet
M12 - 8 pin female, A-coded
MAINT
CIM socket
SD memory card receptacle
CIM
Ground connection
Threaded post (stud) for ring lug connection
All physical connections and interfaces are located on the front panel of the Locomotive Transceiver.
The following figure and table illustrate the ports and connectors on the Locomotive Transceiver front panel.
Figure 6 Locomotive Transceiver ports and connectors
Table 3 Locomotive Transceiver front panel interface connections
1.3.3 WAYSIDE TRANSCEIVER
The ITC 220 Wayside Transceiver is housed in a die-cast metal chassis. Mounting lugs at top and bottom of the chassis
allow for a variety of mounting options, including in 19-inch channel-rack installations.
1.3.3.1 WAYSIDE TRANSCEIVER DIMENSIONS
Overall dimensions of the ITC 220 Wayside Transceiver are approximately 15.5 in. width × 9.5 in. height × 2.0 in. depth,
as shown in Figure 1 below.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 8
Figure 7 ITC 220 Wayside Transceiver overall dimensions
(Dimensions shown are in inches.)
The Wayside Transceiver may be mounted vertically or horizontally, providing that the unit is mounted such that the
cooling fins, CIM card door, and cable connections are unobstructed. When mounting the unit, choose an orientation
that provides clear visibility of the status LEDs. Dimensions of mounting lugs for mounting the unit are shown in Figure
2, which follows.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 9
Figure 8 Wayside Transceiver mounting lug dimensions
(Dimensions shown are in inches.)
Spacing of mounting lugs and slotted holes provide versatility for mounting the Wayside Transceiver. Figure 9, which
follows, shows the recommended method of installing the Wayside Transceiver in a typical EIA 19" telecommunications
rack application.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 10
Figure 9 Wayside Transceiver mounted in a typical EIA 19" rack application
(Dimensions shown are in inches.)
1.3.3.2 WAYSIDE TRANSCEIVER CONNECTIONS
All physical connections and interfaces are located at the bottom (as viewed with the unit mounted vertically) of the
Wayside Transceiver, except the CIM card slot, the door for which is in the right side of the unit (as viewed mounted
vertically).
The following figure and table illustrate the interface connections at the bottom panel of the unit.
Figure 10 Wayside Transceiver bottom panel interface connections
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 11
Table 4 Wayside Transceiver bottom panel interface connections
Interface
Connector Type
Label
TX RX Antenna
Type N female
ANT
DC Power Input*
Wago p/n 231-833/001-000
13.6 VDC
GPS Antenna
TNC female
GPS
Data Network Ethernet
RJ-45
LAN
Maintenance Ethernet
RJ-45
MAINT
CIM socket
SD memory card receptacle
CIM
Ground connection*
Threaded post (stud) for ring lug connection
*The Wayside Transceiver requires an external isolated power supply to provide ground isolation between the unit and
site electronics. Failure to use an isolated power supply (for example, connecting a unit directly to site batteries)
would induce a ground fault at the site since the unit is grounded to the bungalow both through the ground lug as
well as the GPS and 220 GHz RF narrowband antennas.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 12
2 FOLLOW EST A BLISHED SAFE TY GUIDELINES
Caution – Please refer to the RF Energy Exposure Guide for ITC 220 Base Station, Locomotive, and Wayside
Transceivers Installed in Vehicles or at Fixed Sites that is packaged with each transceiver for specific
information regarding safe distances that must be maintained between personnel and energized
transmitting antennas.
Your employer has created safety guidelines that apply to your work environment and tasks. Please follow them. If you
have questions about general on-the-job safety concerns, please consult your employer’s established safety guidelines.
2.1 ELECTRICAL SAFETY
To reduce the risk of electric shock:
Follow your employer’s established electrical safety guidelines.
Disconnect power from the transceiver before removing the cover.
Be aware that removing the cover of the radio transceiver may expose you to dangerous voltages or other risks.
Avoid making internal adjustments to the radio transceiver when you are alone.
Avoid contact with a radio’s electrical components. Electric shock from voltages present with the radio transceiver
are potentially fatal.
Reassemble radio transceivers correctly. Incorrect reassembly of a radio transceiver can cause a harmful electric
shock to anyone who handles it.
3 IMPORTANT INFORMATION FOR THE USER
3.1 TRANSMITTER WARM-UP PERIOD (BASE STATION TRANSCEIVER ONLY)
The transmitter of the Base Station Transceiver uses a precision oven-controlled crystal oscillator (OCXO). The OXCO
warm-up period is one minute minimum after application of input power before any transmission should commence.
Locomotive and Wayside Transceivers use temperature-compensated crystal oscillators (TCXO), which do not require
warm-up time before the transmitter can be used.
3.2 LIMITING RF EXPOSURE
The information in the RF Energy Exposure Guide for ITC 220 Base Station, Locomotive, and Wayside Transceivers
Installed in Vehicles or at Fixed Sites (RF Energy Exposure Guide) is determined form FCC and Industry Canada rules
that, when followed, limit human exposure to radio frequency energy to acceptable levels. Note that although
transceivers and antennas are expected to be sited, installed, and maintained only by professionals in a controlledexposure environment, the RF Energy Exposure Guide lists the larger lateral safe distances for an uncontrolled
environment. Obeying these limits will protect both railroad employees and the general public.
Radio transceivers are intended to be operated with a fixed antenna in an Occupational/Controlled Exposure
environment per FCC OET 65 or Controlled Use Environment per IC RSS-102. The Maximum Permitted Exposure (MPE)
limit for devices in the presence of the general public in the 100-300 MHz range is 0.2 mW/cm2 = 2 W/m2 vs. 10 W/m2
in a controlled-exposure environment.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 13
Radio transceivers are intended for use by railroad employees who have full knowledge of their exposure and can
Note – RF exposure compliance at multiple transmitter sites must be addressed on a site-by-site basis. It is
the responsibility of the licensee to ensure compliance with maximum exposure limits
exercise control over their exposure to meet FCC and IC limits. These radio devices are not intended for use by
consumers or the general population. Base station antennas must be positioned on towers or nonresidential buildings
that are generally unoccupied except while servicing the equipment therein.
Tables in the RF Energy Exposure Guide list the calculated lateral distances to be maintained between the general
public and an operational transmitter antenna for antenna types suitable in fixed and mobile applications.
3.3 FIXED ANTENNA GUIDELINES
This section contains antenna information and additional notes regarding methods to limit RF exposure.
The licensee is required to comply with limits on antenna location, power, and effective antenna height per 47CFR
Subpart T §90.701 et. Seq., or Industry Canada SRSP-512 §6.3 as applicable. The section titled “Transceiver-Radiated
Power Limits,” below, provides additional information on how to comply with ERP limits.
Refer to the RF Energy Exposure Guide, which is packaged with each Base Station and Locomotive Transceiver and
available online or by request, for specific guidelines regarding placement and installation of fixed antennas.
Acceptable fixed-antenna types are listed in the Rated Power and Recommended Lateral Distance tables in the RF
Energy Exposure Guide.
Install antennas in accordance with the manufacturer’s instructions.
Disable the transmitter when installing or servicing its antenna or transmission line.
Maintain a safe distance from energized transmitting antennas. Refer to the table of safe distances for Base radios
in the RF Energy Exposure Guide.
Unauthorized antennas, equipment modifications, or attachments could invalidate any equipment warranty or
authority to transmit. Modification could damage the radio transceiver and may violate FCC or IC regulations.
Contact CalAmp before using other antennas.
3.4 RF INTERFERENCE TO RESIDENTIAL RECEIVERS
Notice to user: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device
does not cause harmful interference.
Note: this equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 14
3.5 EQUIPMENT MODIFICATIONS
Caution – Any changes or modifications to this equipment not expressly approved by the party responsible
for compliance (in the respective country of use) could void the user’s authority to operate the equipment.
It is the responsibility of the licensee to comply with the effective radiated power limits based on operating
frequency, geographic location, and effective antenna height specified in 47CFR Subpart T §90.701 et. seq.,
or Industry Canada SRSP-512 §6.3, as applicable.
4 TR ANSMITTER OPERATION
It is the responsibility of the licensee to operate this radio transmitter in compliance with FCC and Industry Canada
service rules for 220-222 MHz, namely FCC Rules Part 90 Subpart T and Industry Canada SRSP-512.
4.1 TRANSCEIVER CHANNELIZATION AND FREQUENCY RANGE
Transceivers can be configured to transmit on any one of 80 selectable 25 kHz spaced channels ranging from 220.0125
to 221.9875 MHz inclusive. The spectrum included corresponds to all 5 kHz-wide FCC channels numbered from 1 at
220.0025 MHz to 400 at 221.9975 MHz. Each Base Station transmission occupies five of the FCC-defined 5 kHz
channels. The lowest radio channel center frequency is in the center of FCC channel 3 and the next is centered on FCC
channel 8, then 13, 18, and so on, up to the highest, which is centered with FCC channel 398.
4.2 BASE CHANNEL RESTRICTIONS
Section 90.715 of the FCC Rules lists the authorized frequencies of the 400 total 5 kHz wide channels. According to
§90.733(d), these can be aggregated into larger channel widths with the exceptions of FCC channels 161-170 and 181-
185. Therefore, the radio may not transmit on those channels or their 221 MHz counterparts, 361-370 and 381-385.
This corresponds to frequencies 220.8125, 220.8375, 220.9125, 221.8125, 221.8375, and 221.9125 MHz.
Please refer to Part 90 Subpart T and SRSP-512 for additional frequency use restrictions in Canadian and Mexican
border areas.
4.3 TRANSCEIVER-RADIATED POWER LIMITS
Important: The following supplementary antenna system information discusses means for the licensee to determine
effective radiated power (ERP) and to comply with regulatory power limits.
Licensees must comply with specific power vs. antenna height above average terrain (HAAT) limitations for fixedantenna stations per §90.729 or SRSP-512 §6.3 unless operating under an explicit waiver of the applicable rule. Note
that U.S. and Canadian power vs. antenna HAAT limitations are not identical and differ in this regard.
Licensees should also note that fixed and mobile installations transmitting between 221 and 222 MHz must limit
effective radiated power (ERP) to 50 W or 10log(50) + 30 = 47 dBm PEP referenced to the 2.15 dBi gain of a dipole. The
EIRP for this case is 49.15 dBm. Also note that the maximum ERP on FCC/IC channels 196-200 at 220.975 to 221.000
MHz is 2 watts.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 15
Base Station:
Common single element fixed station antennas typically exhibit 2.1 to 5 dBi (0 to 2.9 dBd) gain and being vertically
polarized, are usually omnidirectional. Multi-element antennas are designed to concentrate RF radiated power
toward the horizon and away from the sky and the earth and, depending on the design criteria, provide azimuthal
gain directivity that decreases ERP in the direction of other base stations or increases ERP in a specific direction.
They may also be used to make up for large losses between transmitter and antenna. The isotropic gain of a
commonly-used two-element exposed dipole antenna is typically 7 to 8 dBi.
Once the allowable ERP is determined by applying all power-restrictive rules from above and the antenna gain is
known, the transmitter peak envelope power (PEP) output feeding the transmission line is determined by
subtracting the antenna gain in dBi from the EIRP and adding the loss from the antenna feedline and connectors
plus the loss from any combiners, cavity filters or lightning arresters. If the net value is greater than or equal to
48.75 dBm, then the 75 W maximum power of the Base transmitter can be used. If the value is less than 48.75 dBm,
then the transmitter output power should be reduced to the net value. Example for the 50 W ERP case: Antenna
gain = 8 dBi, feedline and connector loss = 2 dB. Assuming no other losses, the transmitter power output limit =
49.15-8+2 = 43.15 dBm PEP or 20.7 W PEP. In this case, the Base RF output power should be adjusted to 20.7 W PEP
or less.
If the calculated transmitter power limit is less than the minimum Base rated power of 10W PEP = 40 dBm PEP, then
an external RF attenuator would be inserted in the feed line to increase the loss between transmitter and antenna
to achieve compliance.
Locomotive
Antennas designed for locomotives at 220 MHz generally use a rugged cast aluminum body and are top-loaded
vertically polarized requiring a metal cab roof for a ground plane. They are necessarily electrically shorter than onefourth wavelength due to vertical space limitations. Maximum antenna gain is expected to be at 0 dBd – 2.15 dB.
FCC rule §90.729(b) limits mobile operation at 220-222 MHz to 50 W ERP, which is calculated relative to a free-
space dipole with 0 dBd = 2.15 dBi gain. Since the locomotive antenna has a maximum gain equal to a dipole and
the rated maximum transmitter output power is 50 W PEP, compliance with the 50 W ERP limit is assured.
The actual power will be less than 50 W ERP when the feedline and filter losses between transmitter and antenna
are taken into account. Minimum feedline loss is expected to be 0.5 dB and an inline 160 MHz reject filter adds 0.7
dB loss for a total loss of 1.2 dB. The actual ERP is therefore 47 – 1.2 = 45.8 dBm = 38 watts. The transmitter
installation cannot be operated on FCC channels 196-200 due to the 2 W limitation.
Wayside:
The allowable transmitter peak envelope power output in dBm is determined by subtracting the antenna gain in dBi
from 49.15, then adding the loss from the antenna feedline and connectors. If the result is greater than or equal to
44.85 dBm = 14.85 dBW then the maximum power output of the Wayside transmitter can be used. If the value is
less than 44.85 dBm, then the transmitter output power must be reduced to the calculated value.
Mobile installation: As an example of a mobile installation, consider a vertical half-wave ground plane on a vehicle
metal rooftop. In an ideal installation, the antenna gain = 2.4 dBd = 4.55 dBi. Ignoring connector losses, feedline loss
is at least 0.6 dB for 10 feet of Times Microwave LMR 195 Ultra Flex coaxial cable. Transmitter output power output
limit = 47 – 2.4 + 0.6 = 45.2 dBm PEP and therefore the system is compliant with the 50 W ERP limit. The actual ERP
in this case is 10^(14.85+2.4-0.6) = 46.2 W. This installation is not allowed to transmit on FCC channels 196-200
because the maximum ERP is greater than 2 watts.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 16
Fixed installation: In a fixed installation, a common single element exposed folded dipole antenna without reflector
has 0 up to 2.9 dBd (2.1 to 5.0 dBi) azimuthal gain depending on the design.
Once the allowable ERP is determined by applying all power-restrictive rules from above and the antenna gain is
known, the transmitter peak envelope power output feeding the transmission line is determined by subtracting the
antenna gain in dBi from the EIRP and adding the loss from the antenna feedline and connectors plus the loss from
any external inline power sensors, combiners, filters, or lightning arresters. If the net value is greater than or equal
to 44.85 dBm, then the maximum power of the Wayside transmitter can be used. If the value is less than 44.85
dBm, then the transmitter output power must be reduced to the net value.
Example for the 50 W ERP case: Antenna gain = 2.9 dBd and feedline loss is at least 0.5 dB for 25 feet of Times
Microwave LMR -400 coax plus 0.4 dB for inline lightning arrester and three connectors. Assuming no other losses,
the transmitter power output limit = 47-2.9+0.9 dBm = 45 dBm PEP. In this case, the actual Wayside ERP is
44.85+2.9-0.9 dBm = 46.85 dBm = 48.4 W PEP and therefore the system is compliant with the 50 W ERP limit. This
installation is not allowed to transmit on FCC channels 196-200 because the maximum ERP is greater than 2 watts.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 17
5 TR ANSCEIVER SERVICE
Type
Model
Notes
24 VDC power supply
For testing 24 V Base Station Transceiver—constant
voltage DC power supply with precision current output
display, capable of 10 A at 24 VDC
48 VDC power supply
For testing 48 V Base Station Transceiver—constant
voltage DC power supply with precision current output
display, capable of 5 A at 48 VDC
74 VDC power supply
For testing Locomotive Transceiver—constant voltage
DC power supply with precision current output
display, capable of 4A at 74 VDC
13.6 VDC power supply
For testing Wayside Transceiver—constant voltage DC
power supply with precision current output display,
capable of 10 A at 13.6 VDC
Vector signal generator
Agilent E4438C or
equivalent
Recommended option for 50 VDC, 50 W input
protection of RF signal output port. Preprogrammed
with DQPSK data packet and appropriate preamble
reqired by Sprint release. See APPENDIX G— Program
Signal Generator for DQPSK.
Vector signal analyzer
Agilent E9010A or
equivalent
Handheld RF spectrum analyzer
Anritsu or equivalent
10 MHz frequency standard
Standard Research
Systems model FS725
or equivalent
Base frequency adjustments require frequency
standard accuracy to 0.01 ppm or better.
60 dB power attenuator/load
Consists of two pieces with 100 W and 2 W min.
power rating.
Constant voltage DC power
supply
Verify unit supports voltage and current draw required
by unit under test.
Host computer with at least one
Ethernet port and XtermW or
equivalent terminal program
installed
If the host computer’s Ethernet port has not been
configured, then follow the instructions in 5.4
Configure Computer Ethernet Ports to Communicate
with the Transceiver.
Service technicians should be familiar with installation instructions provided in Installation Guides for Base Station,
Locomotive, and Wayside Transceivers. Installation procedures are summarized only briefly as they relate to service
procedures in this chapter. Refer to the Installation chapter of the Installation Guides for radio transceiver installation
details.
5.1 RECOMMENDED EQUIPMENT
Following is a list of test equipment required to perform tests and adjustments described in this Field Service Guide. It
is expected the user is familiar with the pieces of test equipment listed below. Instructions on how to use the following
equipment are beyond the scope of this document.
Table 5 Recommended equipment
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 18
Type
Model
Notes
Ethernet cable(s)
Category 5 or better
One Ethernet cable for each computer Ethernet port.
Standard Ethernet cable terminated with RJ-45
connectors.
Clip-on ammeter
Antenna / VSWR test kit
Cable ties as required
Digital volt meter
Network analyzer
Power (Watt) meter
Site tester
7/16"and 1/2" open-end
wrenches
7/16" wrench for 1/4" hex nut on grounding stud, on
all transceivers;
1/2" wrench for 5/16" hex nuts on power terminals,
Base Station Transceiver only
#2 Phillips head screwdriver
Torque wrench with 100 in.·lb.
capacity
Crimping tool
For assembling power cable(s), if required
5.2 ROUTINE MAINTENANCE
Transceivers require the following routine maintenance. The user (or person responsible for the equipment on site)
should check transceivers periodically to verify that each transceiver and cables are maintained and remain securely
supported, clear of dust and obstructions, and away from potential causes of overheating.
Remove dust and obstructions from heat-sink fins.
Ensure that the unit is not subjected to excessive heat from adjacent equipment.
Make sure that the unit is securely mounted and supported.
Restrain cables to prevent stress on connectors.
Make sure that the SD memory card (CIM) door is securely closed.
Keep the indicator-LED panel dust-free and LEDs viewable.
For Base Station Transceivers, check fan operation and make sure the fans are not obstructed. More advanced
information about checking fan operation is provided later in this chapter. The following figure illustrates the areas
to keep unobstructed.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 19
Figure 11 Base Station Transceiver — areas must not be obstructed
For Locomotive and Wayside Transceivers, verify clearances specified in installation instructions are maintained.
Figure 12 Locomotive and Wayside Transceiver — areas must not be obstructed
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 20
5.3 VISUAL INSPECTION
Label
Description
Color
PWR
Power — Blinking green LED indicates that the unit is on.
Green
TX
Illuminates when the radio transmitter is keyed.
Red
SWR
Illuminates when the VSWR of the TX port exceeds approximately 3:1.
Illuminates if the TX forward power is not within 25% of the RF output power setting.
(A time-stamped entry specifying the cause will be entered in the ALARM.LOG file and will
display in the XtermW window hen connected.)
Red
RX
Illuminates when the transceiver is receiving a valid 220 MHz PTC signal.
Amber
DTL
DTE Link — Illuminates when the transceiver establishes a connection to a Communication
Manager (CM) through the Ethernet network port.
Amber
Visually inspect the transceiver and note any dents or damage or missing or loose parts. Also verify heat-sink fins are
clear of dust and debris, that potential sources of excessive heat are not mounted near the transceiver, and that the
bullet points described in Routine Maintenance have been followed.
If you detect damage or missing parts, you will need to determine whether the transceiver is repairable or if it should
be replaced. Depending on what you determine, you may need to order replacement parts or a replacement
transceiver accordingly.
5.3.1 CONFIRM SD MEMORY CARD (CIM) IS I NSTALLED AND SEATED
Note: The SD memory card must be inserted in the orientation shown on the door.
To confirm the CIM card is installed and seated:
Open the CIM door to ensure the SD memory card is present in the CIM socket.
Push the SD memory card once to release it.
Push the SD memory card again to ensure it is seated in the socket.
Once confirmed, close and secure the CIM door.
5.3.2 LED DIAGNOSTICS
The front panel LEDs show the general operational status of the transceiver after it has conducted a POST, which it
does each time it boots up. Table 6 Front panel LEDs includes a description of the function of each LED as well as the
color of each LED when the transceiver is functioning properly.
Note: If a problem occurs after the transceiver boots up, the front panel LEDs indicate the problem only after a reboot
of the transceiver (provided the problem persists).
Read the description of each LED carefully. Some LEDs, such as the PWR LED, indicate a problem when they are off.
Other LEDs, such as the FLT (Fault) and SWR, indicate a problem when they are lit. A time-stamped entry will be written
to the ALARM.LOG file on the CIM SD card and will be displayed onscreen when connected in XtermW whenever the
FLT or SWR LEDs are illuminated.
Table 6 Front panel LEDs
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 21
Label
Description
Color
RFL
RF Link — Illuminates when an RF link is established between two radios.
Amber
STBY
Standby — Illuminates when the transceiver is in standby mode, indicating TX is disabled.
Red
FLT
Fault — When illuminated, it indicates a variety of fault conditions not indicated by other
LEDs.
Possible faults indicated by the Fault LED include:
One or more internal radio supply voltages are below the minimum threshold.
The extended DC voltage to the transceiver is outside of the acceptable range.
One or more of the transceiver’s internal sensors is indicating a temperature exceeding
the allowable threshold.
The transceiver failed one or more self tests at power on.
TX forward power is not within 25% of the RF output power setting.
The CIM script file is not present or has invalid or corrupt data.
If the Fault LED illuminates, a time-stamped entry will display in XtermW specifying the
cause and will be entered in the Alarm.log file.
Red
A flashing PWR (Power) LED on the front panel indicates that the boot sequence has completed. The Ethernet port
connection becomes active within 10 seconds, allowing you to start an XtermW session.
The above indicators assist in troubleshooting common problems provided the LEDs are operational. If an LED is burnt
out or damaged, however, it will not be able to provide any indication when an error condition may exist. For this
reason, more advanced information about verifying that the LEDs are operational is provided later in this chapter.
5.4 CONFIGURE COMPUTER ETHERNET PORTS TO COMMUNICATE WITH THE T RANSCEIVER
It is recommended that you use a computer with two Ethernet interfaces so that your computer can communicate with
a transceiver’s MAINT and LAN Ethernet ports at the same time. You need XtermW installed on the computer and have
administrative rights to configure the Ethernet interfaces.
Notes:
The following configuration examples are for directly connecting to the transceiver and bypassing any network
infrastructure. If direct access to the transceiver cannot be obtained, then contact your network administrator for
instructions.
If you are using the factory defaults, then use the following examples. If you are not using the factory defaults, then
contact your network administrator for the appropriate IP settings.
For these examples, Ethernet 1 refers to the computer’s first Ethernet port and is used for communication with the
transceiver MAINT port, and Ethernet 2 refers to the computer’s second Ethernet port and is used for communication
with the transceiver LAN port. It is possible to communicate with the radio transceiver using a computer with a single
Ethernet port, but you will only be able to communicate with one port at a time, and you will need to reconfigure the
port each time to use the appropriate IP address for the transceiver port you are connecting to.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 22
5.4.1 TO CONFIGURE TH E COMPUTER ETHERNET 1 INTERFACE FOR COMMUNICATION WITH
THE TRANSCE IVER MAINT PORT
1. On the computer, click Start, Control Panel, Network Connections, and then Local Area Connection.
There will be one Local Area Connection icon for each Ethernet port on the computer. Click the Local Area
Connection icon that corresponds to the first Ethernet port.
2. The Local Area Network Connection Status window opens. Click Properties and the Local Area Connection
Properties window for the first Ethernet connection opens.
Figure 13 Local Area Connection Properties window for Ethernet 1 connection
3. On the General tab, click on Internet Protocol (TCP/IP) to select it (you may have to scroll down in the items list to
see it—do not remove the check mark), and then click Properties.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 23
Figure 14 Internet Protocol (TCP/IP) Properties window for Ethernet 1 connection
4. Click Use the following IP address.
5. In the IP address box, enter 192.168.255.200.
6. In the Subnet mask box, enter 255.255.255.0.
7. Click OK.
ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A | Page 24
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