Meteorcomm 63020 Locomotive Radio User Manual ITCR Locomotive Radio User Guide

Meteorcomm LLC Locomotive Radio ITCR Locomotive Radio User Guide

Contents

Users Manual Draft 3

ITCR Locomotive Radio User's Manual and Installation Instructions Applicable Model: 63020 Note: The final version of this manual will include a French translation.
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential ii Do Not Distribute 9/27/2011 Revision History Revision Date Summary of Changes Contributor 0.1 Initial Draft Neil Ross 0.2 8/29/2011 Add notices to user and general editing for FCC/IC Submission Fred Cleveland 0.3 9/27/2011 Expand Section 1, Rewrite Section2, insert new Section 3. Fred Cleveland 0.4 Document Number: Date Complete: Confidential and Proprietary Notice This document contains information that is considered confidential and/or proprietary to Meteorcomm® LLC (“MCC”) and shall not be disclosed, transmitted, distributed, duplicated or used in whole or in part except as agreed under separate contract between MCC and the recipient. All information contained herein shall be kept confidential. MCC makes no representations or warranties, express or implied. All warranties, including but not limited to, warranties of merchantability, fitness for a particular purpose, and non-infringement are hereby expressly disclaimed. Unless expressly authorized in writing, the name and trademarks of MCC may not be used. All other rights are reserved. Disclaimers This is a draft document only but provides sufficient information to support an initial engineering project. The estimates contained herein represent MCC’s current best estimates and will be refined over time. MCC makes no representations or warranties of any kind, express or implied, about the completeness or accuracy of the values contained herein. Any reliance placed on these values is done strictly at the risk of the user. Any designs contained in the document were developed using standard layout guidelines for most common and practical applications. All schematic symbols, footprints and layer definitions should be validated by the customer’s own technical experts as application specific requirements may differ. By downloading, using, or referring to a schematic, design or footprint, the user agrees to release MCC from all liability related to the use or application of the schematic, design or footprint. ©2011 Meteorcomm LLC. All rights reserved. Meteorcomm is a registered trademark of Meteorcomm LLC. Document Number: XXX-XXX-0000XXXX
ITCR Locomotive Radio User Guide 9/27/2011 iii Table of Contents 1. Overview ............................................................................................................................. 1 1.1 Applicable Radio Models and Identifiers ................................................................ 1 1.2 General Description ................................................................................................ 1 1.3 Chassis ..................................................................................................................... 2 1.4 Ports and Ethernet Connectors .............................................................................. 2 1.5 Power Connectors ................................................................................................... 2 1.6 Antenna Connector ................................................................................................. 2 2. Important Information for the User ................................................................................... 2 2.1 Transmitter Warm-Up Period. ................................................................................ 2 2.2 Limiting RF Exposure ............................................................................................... 3 2.3 Antenna Guidelines ................................................................................................. 3 2.4 RF Interference to Residential Receivers (Part 15) ................................................. 4 2.5 Equipment Modifications ....................................................................................... 5 3. Locomotive Transmitter Operation .................................................................................... 5 3.1 Locomotive Channelization and Frequency Range ................................................. 5 3.2 Locomotive Channel Restrictions ............................ Error! Bookmark not defined. 3.3 Locomotive Radiated Power Limits ......................... Error! Bookmark not defined. 4. Setup and Configuration for the Locomotive Radio ........................................................... 7 4.1 Power ...................................................................................................................... 7 4.2 Ethernet Connection ............................................................................................... 8 4.3 RF Output Termination ........................................................................................... 8 5. Tuning the Locomotive Radio ............................................................................................. 8 5.1 Equipment Required ............................................................................................... 8 5.2 Set up the Radio for Testing ................................................................................... 9 5.3 Measure and Calibrate Reference Crystal Oscillator Frequency ............................ 9 5.4 Measure and Adjust Output Power ...................................................................... 11 5.5 Check and Adjust RF Output Channel ................................................................... 12 6. Operations ........................................................................................................................ 12 6.1 Restore Factory Settings ....................................................................................... 12
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential iv Do Not Distribute 9/27/2011 6.2 Display Software and Firmware Revision Numbers ............................................. 12 6.3 Display Radio Identification Information .............................................................. 13
ITCR Locomotive Radio User Guide 9/27/2011 v Table of Tables Table 1 Locomotive Radio Power Parameters .............................................................. 7
ITCR Locomotive Radio User Guide 9/27/2011 1 1. Overview This document provides information required for the operation and verification of the Meteorcomm Interoperable Train Control Radio Network (ITCR) Locomotive radio. 1.1 Applicable Radio Models and Identifiers This document applies to the Locomotive radio model listed below along with its regulatory identifiers. Model: 63020 FCC ID: BIB63020 IC: 1300A-63020 1.2 General Description The Locomotive radios are designed to satisfy the industry standard Positive Train Control (PTC) requirements as an integrated 220 MHz radio network. The Base radio, Locomotive radio, and Wayside radio form the transportation backbone on which a messaging application provides communication capabilities between railroad assets and their back offices. The ITCR is designed to provide communication in an inter-operable fashion enabling messaging to occur across railroad boundaries. The Locomotive radio is a packet data radio that is part of a mobile station. It is half duplex, i.e., it alternately transmits or receives. It is mounted in a designated equipment area inside the locomotive. Its power source is the on-board 74Vdc bus. It is connected by coax to a 220 MHz band antenna on the cab roof. It has an ethernet connection to the on-board Train Management Computer (TMC) and serves the TMC as a wireless off-board communication path. Its primary mission is to receive data packets from Wayside radio stations about the track conditions ahead of its intended path on the rails. This information is passed to the TMC which in turn routes display information to the engineer’s console. The TMC also detects and can independently react to potentially unsafe conditions. The Locomotive radio also wirelessly communicates on 220 MHz with a nearby base station. The base station backhauls the locomotive messages for various monitoring and control purposes at the railroad central office. The Locomotive radio can also receive relayed Wayside
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential 2 Do Not Distribute 9/27/2011 transmissions from any of several nearby base stations on different frequencies that it can monitor simultaneously when not transmitting. 1.3 Chassis Locomotive radios are housed in electrically sealed metal cases. The Locomotive radio is LSI-rack compatible and its height is less than 6xMCUs. It weighs less than 22 lbs. 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. 1.4 Ports and Ethernet Connectors The Locomotive radio provides two 8-pole, female, M12, D coded connectors for Ethernet LAN plus a Maintenance port. 1.5 Power Connectors The Locomotive radio provides a MS 3102 A18-4P connector for nominal 74 Vdc power. 1.6 Antenna Connector The Locomotive radio is provided with two N-type connectors for the narrowband RF antennas. One antenna jack is used for the primary receive and transmit antenna cable. The other is used only for diversity reception. 2. Important Information for the User 2.1 Transmitter Warm-Up Period The Locomotive transmitter uses a temperature compensated crystal oscillator (TCXO) to achieve frequency accuracy and stability. No warm-up period is required beyond the built-in radio startup delays.
ITCR Locomotive Radio User Guide 9/27/2011 3 2.2 Limiting RF Exposure Please refer to the RF Energy Exposure Guide packed with each radio for specific information regarding safe distances that must be maintained between personnel and energized transmitting antennas. The information in the RF Energy Exposure Guide is determined from FCC and Industry Canada rules that when followed, limit human exposure to radio frequency energy to acceptable levels. Note that the RF Energy Exposure Guide calculates the larger lateral safe distances for an uncontrolled environment. Obeying these limits will protect both railroad employees and the general public. This radio is intended for use by railroad employees who have full knowledge of their exposure and can exercise control over their exposure to meet FCC and IC limits. This radio device is not intended for use by consumers or the general population. This transmitter is intended to be operated with a mobile antenna in an Occupational/Controlled Exposure environment per FCC OET 65 or Controlled Use Environment per IC RSS-102. To protect the safety of employees and the general public, application of the Maximum Permitted Exposure (MPE) limit for devices in the presence of the general public in the 100-300 MHz range, 0.2 mW/cm2 = 2 W/m2, is recommended. Table 1 in the RF Energy Exposure Guide lists the calculated lateral distance to be maintained between the general public and an operational locomotive transmitter antenna mounted on the cab roof of a locomotive. The licensee, installer, maintainer and locomotive operators must take into account all transmitting antennas on the locomotive with regard to potential RF exposure. In general, it is recommended that all locomotive transmitters with cab top antennas be disabled before accessing the cab top area. 2.3 Antenna Guidelines This section contains antenna information and additional notes regarding methods to limit RF exposure.
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential 4 Do Not Distribute 9/27/2011  The licensee is required to comply with all limits on frequency of operation, antenna location, power and effective antenna height per 47CFR Subpart T §90.701 et. seq., or Industry Canada SRSP-512 §6.3 as applicable. Mobile antenna installations must adhere to the (general public) lateral separation distances in the RF Energy Exposure Guide supplied with each radio.  Install antennas in accordance with the manufacturer’s instructions.  Disable the transmitter when installing or servicing its antenna or transmission line.  Refer to the RF Energy Exposure Guide for specific guidelines regarding the siting and installation of mobile and fixed antennas.  Acceptable mobile and fixed antenna types are listed in the tables 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 and may violate FCC or IC regulations. Contact Meteorcomm before using other antennas.  Maintain a safe distance from energized transmitting antennas. See above. 2.4 RF Interference to Residential Receivers (Part 15) 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 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 the following measures:  Reorient or relocation the receiving antenna.  Increase the separation between the equipment and receiver.  Connect the equipment into 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.
ITCR Locomotive Radio User Guide 9/27/2011 5 2.5 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. 3. Locomotive Transmitter 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. 3.1 Locomotive radio channelization and frequency range The Locomotive radio 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 Locomotive radio transmission occupies five of the FCC-defined 5-kHz channels. The lowest Locomotive radio channel center frequency is in the center of FCC channel 3 and the next is FCC channel 8, then 13, 18, and so on, up to the highest in the center of channel 398. 3.2 Locomotive 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 exception of FCC channels 161-170 and 181-185. Therefore, the Locomotive radio may not transmit on those channels or their 221 MHz counterparts, 361-370 and 381-385. This corresponds to Locomotive radio 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.
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential 6 Do Not Distribute 9/27/2011 3.3 Locomotive radiated power limits 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 set out in 47CFR Subpart T §90.701 et. seq., or Industry Canada SRSP-512 §6.3, as applicable. Important: The following supplementary antenna system information discusses means for the licensee to calculate effective radiated power (ERP) and how to comply with regulatory power limits. Licensees should note that mobile radios including Locomotive radios must limit effective radiated power (ERP) to 50W or 10*log(50) + 30 = 47dBm PEP referenced to the 2.15 dBi gain of a dipole unless operating under a waiver of FCC rule §90.729(b) or IC SRSP512 §6.3.1.4 as applicable. 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. 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 one fourth wavelength due to vertical space limitations. Maximum practical antenna gain when installed properly on a locomotive cab roof is expected to be 0 dBd = 2.15 dBi. Assuming no other losses between transmitter and antenna, the maximum allowed transmitter output for 0 dBd gain antenna is (47-0) = 47 dBm PEP = 50W PEP. In this case, if the measured transmitter output power exceeds 50W PEP, its power must be adjusted down to 50W PEP. Locomotive radio output power can be adjusted as described later in the manual. The Locomotive transmitter should not be adjusted to greater than 50W PEP output. In a practical installation, the feedline and filter losses between transmitter and antenna are taken into account. If the Locomotive transmitter output is 50W PEP = 47 dBm PEP and the minimum feasible feedline loss is 0.3 dB, then the radiated power is 46.7 dBm = 46.8 W ERP.
ITCR Locomotive Radio User Guide 9/27/2011 7 Most if not all Locomotive installations will include an in-line 220 MHz band pass filter that adds 0.7 dB loss for a total loss of 1.0 dB. This filter prevents generation of intermodulation products in the Locomotive radio power amplifier by other cab top RF power sources, e.g., the 160 MHz voice radio transmitting antenna. The actual ERP in this case is therefore 47-1.0 = 46 dBm = 39.8 watts. The transmitter installation cannot be operated on FCC channels numbered 196-200 due to the 2W limitation. 4. Setup and Configuration for the Locomotive Radio Set up physical connections with the following:  DC power  Ethernet  RF output termination The sections below identify each of the physical connections. 4.1 Power Supply Locomotive radios operate at 74V. Table 1 describes the power supply requirements for the Locomotive radio. Caution: Applying an incorrect voltage to a Locomotive radio can cause damage. Confirm the voltage rating of the radio and its power supply before applying power. Caution: The power supply voltage of this radio presents a potential electrical shock hazard. Disconnect all power supply sources before installation or maintenance begins. Table 1 Locomotive Radio Power Parameters Parameter Locomotive Radio Nominal DC Power Input Voltage 74VDC Operational Range 45-100Vdc
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential 8 Do Not Distribute 9/27/2011 Damage limit 120VDC Current Drain (while transmitting rated power) 7A peak max while transmitting into 50 ohm load 2.5A for max average operating current 4.2 Ethernet Connection Locomotive radios use a non-standard Ethernet cable (MCC P/N 14001627-01) to connect between a PC and the maintenance port of the radio. Configure the PC network card with a fixed IP address of 10.10.1.254. You will use XtermW, a Meteorcomm terminal emulation program, to connect with and control the radio via commands issued at command prompts. 4.3 RF Output Termination The Loco radio is rated for 50W PEP. Sufficient termination is required to protect test equipment. Locomotive radios have a single TX/RX port with two additional ports for receiving only. For transmitter testing, connect the test equipment to the port labeled “TX/RX.” 5. Tuning the Locomotive Radio There are three parameters to test and potentially tune before/during RF testing:  Master reference crystal oscillator frequency  RF output power  RF output channel Factory technicians tune the master reference crystal oscillator and set the RF gain for maximum rated output power. You may have to adjust the three parameters before or during RF testing by entering commands using XtermW or another terminal emulation program. 5.1 Equipment Required 1. 10A DC power supply at rated voltage of Locomotive radio, nominally 74 VDC. 2. Personal computer with ethernet network adapter and Meteorcomm XtermW or equivalent terminal program installed.
ITCR Locomotive Radio User Guide 9/27/2011 9 3. 30 dB 50W RF power attenuator. 4. Vector spectrum analyzer for power and frequency measurements. 5. Optional 8+ digit frequency counter for frequency measurements. 6. High stability time base accurate to 0.1 ppm. Can be internal to items 4 and 5. 5.2 Set up the Radio for Testing 1. Connect a cable that has CAT5 ethernet connector on one end and an 8-pin M12 cable connector on the other end (MCC P/N 14001627-01). Connect the M12 connector to the radio port labeled MAINT. Connect the other end to a computer network card. The default radio IP address is 10.10.1.254. Set the IP address of the computer network card to a compatible fixed address such as 10.10.1.1. The computer should have Meteorcomm XtermW or a similar terminal emulation program installed. 2. Adjust a 10A DC power supply to 74 VDC and then disable it temporarily. Connect the Locomotive power cable to the radio and then observing polarity markings connect the cable to the power supply terminals. 3. Apply power to the radio. Wait 30 seconds to open an XtermW session. Use the Edit/Configure Port window to set Port Type = TCP/IP, Protocol = Stream, TCP/IP Settings Host = 10.10.1.254, Port 4000. Select Device Type = MCC 6100 SDR (which also applies to ITC radios). Return Character = CR, Data Format = ASCII. 4. Attach a 50W 30 dB RF attenuator to the TX/RX1 N-type antenna connector. Attach an (e.g., Agilent MXA or PXA) vector spectrum analyzer or similar to the transmitter port for power and frequency measurements. The VSA should contain either a precision stability reference oscillator or attach an external rubidium reference to the VSA external reference input. 5.3 Measure and Calibrate Reference Crystal Oscillator Frequency The instructions below allow you to change the factory calibration settings for the master reference oscillator crystal. To check the master reference crystal oscillator frequency calibration: 1. Open an XtermW session. 2. Put the radio into test mode by typing: dsp,watchdog,off dsp_mode,test
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential 10 Do Not Distribute 9/27/2011 3. Reduce output power to approximately 2W by typing: cal,set,igain,-1000 cal,set,qgain,-1000 4. Begin transmitting a test tone offset +8kHz from the carrier: dsp_mode,idle dsp_mode,test l1_test,stop l1_test,set,txmod,cw l1_test,set,txfreq,220012500 l1_test,start,tx 5. Use the frequency counter or frequency counting marker on the VSA to measure the output frequency. The measured value is exactly 8 kHz greater than the actual carrier frequency. The carrier frequency is normally well within 352 Hz (1.5 ppm) of the carrier frequency. 6. Alternate to the test tone: Substitute the following π/4-DQPSK modulation command for the fourth line in step 4. l1_test,set,txmod,dqpsk 7. Set the VSA to the center frequency of the channel and set it to demodulate the 16 ksym/second π/4-DQPSK emission and measure the error frequency which is referenced to the VSA center frequency. To adjust the master crystal reference oscillator parameters: 1. First, check the factory default setting for the crystal reference parameter by typing cal 2. Note the value for “xo” in the cal factors table that is displayed. 3. At the XtermW command line, type: cal,set,xo,xx where xx is some value close to the original factory set value. 4. Use trial and error to determine the set point for the xo value to achieve the desired carrier frequency accuracy.
ITCR Locomotive Radio User Guide 9/27/2011 11 To reset the XO tuning parameter to the factory setting: Power cycle the radio. 5.4 Measure and Adjust Output Power Caution: Avoid unnecessary adjustments. Exercise caution when setting I and Q gain values as damage to the radio can occur if gains are set too high. The Locomotive radio is rated for 50W PEP. To achieve this power radios are pre-calibrated at the factory. If additional tuning is required, use an appropriate method to determine PEP for a π/4-DQPSK signal and slowly increase/decrease I and Q gain levels from their nominal set point, as determined by issuing the command ‘cal’. A step of 100 points (for example, -250 to -150) is approximately equivalent to an increase of 2dB in power. To measure and adjust output power: 1. At the XtermW command line, begin transmitting a π/4-DQPSK signal by typing: dsp_mode,idle dsp,watchdog,off dsp_mode,test l1_test,stop l1_test,set,txmod,dqpsk l1_test,start,tx 2. View the calibration settings by typing: cal 3. Note the values for igain and qgain. They are normally matched. 4. Increase the output level by entering larger matched values or reduce output level using smaller matched values. Use cal command in between to verify the new settings. cal,set,igain,xxxx cal,set,qgain,xxxx
ITCR Locomotive Radio User Guide © 2011 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential 12 Do Not Distribute 9/27/2011 5. Tune the VSA to the center of the channel frequency and use the CCDF function to measure the peak envelope power, average power and peak to average ratio. Do not set peak envelope power greater than 50W. 5.5 Check and Adjust RF Output Channel You can adjust the RF output channel by stopping transmission, setting transmission frequency, and then starting transmission again. To adjust RF output channel: 1. Tune the radio to the bottom channel (220.0125MHz) by typing: l1_test,stop l1_test,set,txfreq,220012500 l1_test,start,tx 2. Tune the radio to the mid-channel (221.0125MHz) by typing: l1_test,stop, l1_test,set,txfreq,221012500 l1_test,start,tx 3. Tune the radio to the high channel (221.9875MHz) by typing: l1_test,stop l1_test,set,txfreq,221987500 l1_test,start,tx 6. Operations This section provides commands used during normal operation of the Locomotive radio. 6.1 Restore Factory Settings To restore factory settings without cycling the radio:  At the XtermW command prompt, type: factory 6.2 Display Software and Firmware Revision Numbers To display what software and firmware versions are installed on your radio:
ITCR Locomotive Radio User Guide 9/27/2011 13  At the XtermW command prompt, type: rev 6.3 Display Radio Identification Information This section provides you with commands to display serial number and identification information. To display serial number information:  At the XtermW command prompt, type: serialnumber To show current ID setting: • At the XtermW command prompt, type: ID

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