Meteorcomm 63030-48 Packet Data Transceiver - Fixed use - 48Vdc User Manual ITCR Base Radio User s Guide

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ITCR Base Radio
User's Manual and Installation
Instructions
Applicable Models: 63030-24, 63030-48
ITCR Base Radio User's Guide
Revision History
Revision Date
Summary of Changes
0.1
Initial draft.
0.2
Changes by Neil Ross.
0.3
8/29/2011
Add notices to user and expanded
RF exposure Information. General
editing.
0.4
9/8/2011
Fix errors and omissions
0.5
10/11/2011 Revise Section 1.2, 1.6, 2.2, 2.3,
insert new Section 3, revise
Section 4. Minor edits to 4.1 and
5.3.
5/8/2013
Update USA Frequency Coverage
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
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ITCR Base Radio User's Guide
Table of Contents
1.
2.
3.
4.
5.
6.
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 Connectors ............................................................................................... 2
Important Information for the User ................................................................................... 3
2.1
Transmitter Warm-up Period.................................................................................. 3
2.2
Limiting RF Exposure ............................................................................................... 3
2.3
Fixed Antenna Guidelines ....................................................................................... 4
2.4
RF Interference to Residential Receivers ................................................................ 4
2.5
Equipment Modifications ....................................................................................... 5
Base Transmitter Operation ............................................................................................... 5
3.1
Base Radio Channelization and Frequency Range .................................................. 5
3.2
Base Channel Restrictions ....................................................................................... 6
3.3
Base Radiated Power Limits .................................................................................... 6
Setup and Configuration for the Base Radio ...................................................................... 7
4.1
Input Power............................................................................................................. 8
4.2
Ethernet Connection ............................................................................................... 8
4.3
RF Output Termination ........................................................................................... 8
Tuning the Base Radio ........................................................................................................ 8
5.1
Equipment Required ............................................................................................... 9
5.2
Set up the Radio for Testing.................................................................................... 9
5.3
Measure and Calibrate Reference Crystal Oscillator Parameters ........................ 10
5.4
Measure and Adjust Output Power ...................................................................... 11
5.5
Check and Adjust RF Output Channel Frequency ................................................. 12
Operations ........................................................................................................................ 13
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ITCR Base Radio User's Guide
6.1
Restore Factory Settings ....................................................................................... 13
6.2
Display Software and Firmware Revision Numbers.............................................. 13
6.3
Display Radio Identification Information .............................................................. 13
Tables
Table 1. Base Radio Input Power Parameters………………………………………………………………..8
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ITCR Base Radio User's Guide
1.
Overview
This document provides important radio frequency safety information and
instructions for the basic operation and adjustment of the Base station radio. This
document pertains to Meteorcomm Interoperable Train Control Radio Network
(ITCR) Base radio models, numbers 63030-24 and 63030-48. Operation of these two
models is identical except for input power requirements of 24 Vdc and 48 Vdc,
respectively.
1.1 Applicable Radio Models and Identifiers
This document applies to two Base radio models listed below along with their
regulatory identifiers. These two models differ only in their power supply input
voltage and associated power supply circuits.
Model: 63030-24
FCC ID: BIB63030-24
IC: 1300A-6303024
Model: 63030-48
FCC ID: BIB63030-48
IC: 1300A-6303048
1.2 General Description
Meteorcomm Base radios are designed to satisfy the industry standard Positive Train
Control (PTC) requirements as part of 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 interoperable fashion enabling messaging to occur across
railroad boundaries.
The Base station radio is normally positioned inside an equipment hut or other
unoccupied building at the base of an antenna tower, all within access-controlled
property that is generally located away from residential areas. The equipment is
installed, serviced and maintained only by professional telecommunications
workers.
The Base communicates via packetized messages in a half duplex manner meaning
that transmission and reception are not simultaneous. The Base organizes
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ITCR Base Radio User's Guide
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 twoway 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.
It contains fans with a temperature sensor that can be set to turn on at a
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.
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.
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.
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ITCR Base Radio User's Guide
The Base also has a TNC connector for the GPS receiver antenna. The GPS antenna
can be active (3.3Vdc, 50mA max) or passive.
2.
Important Information for the User
2.1 Transmitter Warm-up Period
The Base transmitter uses a precision oven-controlled crystal oscillator (OCXO). The
OCXO warm-up period is one minute minimum after application of input power
before any transmission should commence.
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 although the Base station is expected to be
sited, installed and maintained only by professionals in a controlled exposure
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.
The Base transmitter is 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. 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.
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. Base station antennas must be positioned on towers or non-residential
buildings that are generally unoccupied except while servicing the equipment
therein.
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ITCR Base Radio User's Guide
The table in the RF Energy Exposure Guide lists the calculated lateral distances to be
maintained between the general public and an operational Base transmitter antenna
for two antenna types suitable for fixed Base applications.
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.
2.3 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 title Base Radiated Power
Limits further below provides additional information on how to comply with
ERP limits.
Refer to the RF Energy Exposure Guide for specific guidelines regarding the
siting and installation of fixed antennas.
Acceptable fixed antenna types are listed in the lateral separation 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 packed
with each radio.
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.
2.4 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.
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ITCR Base Radio User's Guide
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 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.
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.
Base Transmitter Operation
It is the responsibility of the licensee to operate this radio transmitter in compliance
with the terms of the license and FCC or Industry Canada service rules for 220-222
MHz, i.e., FCC Rules Part 90T and Industry Canada SRSP-512, or in the U.S. only,
operation on 217.6-218 and 219-220 MHz frequencies is subject to FCC Rules Part
80.
3.1 Base Radio Channelization and Frequency Range
The Base radio can be licensed and configured to transmit on any one of 80
selectable 25-kHz spaced channels ranging from 220.0125 to 221.9875 MHz inclusive
in the 220-222 MHz Radio Service defined by Part 90 Subpart T. The spectrum
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ITCR Base Radio User's Guide
included corresponds to all 5-kHz wide FCC channels numbered from 1 at 220.0025
MHz to 400 at 221.9975 MHz. Each Base radio transmission occupies five of the FCCdefined 5-kHz channels. The lowest Base 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.
In the USA only, the radio can be licensed and configured to operate on 56
additional (Part 80) frequencies in the ranges 217.6125 to 217.9875 MHz and
219.0125 to 219.9875 MHz.
3.2 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 exception of FCC channels 161-170 and 181-185.
Therefore, the Base radio may not transmit on those channels or their 221 MHz
counterparts, 361-370 and 381-385. This corresponds to Base 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.
3.3 Base 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 Parts 80 and 90 or Industry
Canada SRSP-512 §6.3, as applicable.
Important: The following supplementary antenna system information discusses
means for the licensee to comply with regulatory power limits.
Licensees must comply with the specific power vs. HAAT limitations for fixed base
stations. U.S. and Canadian power limits differ in this regard.
Licensees should also note that fixed installations transmitting between 221 and 222
MHz must limit effective radiated power (ERP) to 50W or 10*log(50) + 30 = 47dBm
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ITCR Base Radio User's Guide
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.
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 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 75W 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 50W 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 to achieve compliance.
4.
Setup and Configuration for the Base Radio
Set up physical connections with the following:
•
•
•
DC Power
Ethernet
RF output termination
The sections below identify each of the physical connections.
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ITCR Base Radio User's Guide
4.1 Input Power
A label on the radio chassis indicates the rated voltage of the Base radio: 24 or 48V.
The table below describes the power supply requirements for each type.
Caution: Applying an incorrect voltage outside the rated voltage
range of a Base radio can damage it. Confirm the voltage ratings
of the radio and the power supply before applying power.
Table 1. Base Radio Input Power Parameters
Parameter
Nominal DC Power Input Voltage
Operational Range
Damage limit
Current Drain (while transmitting
rated power)
Base Radio
24VDC radio version
48VDC radio version
21-27 Vdc
42-54 Vdc
(+/-12.5%)
(+/-12.5%)
30VDC
60VDC
11A peak max with 50 6A peak max with
ohm load
50 ohm load
7.5A for max average 4A for max average
operating current
operating current
4.2 Ethernet Connection
Base radios use a standard CAT5 Ethernet cable connected 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 Base radio is rated for 75W PEP max into a 50 ohm resistive load. Base 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.” A suitable RF power
attenuator should be used to protect test equipment.
5.
Tuning the Base Radio
There are three parameters to test and potentially tune before/during RF testing:
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ITCR Base Radio User's Guide
•
•
•
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 any other
terminal emulation program.
5.1 Equipment Required
1. 10A DC power supply at rated voltage of Base radio.
2. Personal computer with ethernet network adapter and Meteorcomm XtermW
or equivalent terminal program installed.
3. 30 dB 100W RF power attenuator.
4. Vector spectrum analyzer for power and frequency measurements.
5. Optional 8+ digit frequency counter for frequency measurements.
6. External high stability time base (e.g., rubidium) accurate to 0.01 ppm. Can be
internal to items 4 and 5.
5.2 Set up the Radio for Testing
1. Connect a cable that has a 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. Find the input voltage rating marking on the radio chassis near the power input
terminal block. It is either 24VDC or 48VDC. Adjust a 10A DC power supply to
the proper voltage; then disable its output. Observing polarity markings
connect the power supply between the radio power terminals and the power
supply.
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.
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ITCR Base Radio User's Guide
4. Attach a 100W 30 dB RF attenuator to the TX/RX 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
Parameters
The instructions below allow you to change the factory calibration settings for the
master reference oscillator crystal. The new setting is stored in volatile memory and
will revert to factory settings when the radio is powered off and then on.
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,idle
dsp_mode,test
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:
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 22 Hz (0.1
ppm) of the carrier frequency.
6. Alternate to the test tone: Substitute the following π/4-DQPSK modulation
command for the second line in step 4.
l1_test,set,txmod,dqpsk
10
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ITCR Base Radio User's Guide
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.
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.
Base radios are rated for 75W 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. The CCDF function on the VSA is
recommended for peak power measurement. 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.
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ITCR Base Radio User's Guide
To measure and adjust output power:
1. At the XtermW command line, begin transmitting a π/4-DQPSK signal by typing:
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
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.
5.5 Check and Adjust RF Output Channel Frequency
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.
12
Tune the radio to the high channel (221.9875MHz) by typing:
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ITCR Base Radio User's Guide
l1_test,stop
l1_test,set,txfreq,221987500
l1_test,start,tx
4. Note that in the USA the bottom and middle frequencies are 217.6125 MHz and
219.8125 MHz.
6.
Operations
This section provides commands used during normal operation of the Base 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:
•
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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Title                           : ITCR Base Radio User's Guide
Description                     : radios installation operation
Creator                         : Meteorcomm Document Services
Producer                        : Adobe PDF Library 10.0
Source Modified                 : D:20130509191144
Company                         : Meteorcomm LLC
Comments                        : Information needed to install and operate the Base PTC radios,
Date 0020completed              : D:20110429
Document 0020 Number            : HWD-PTC-00001319-A
Revision 0020 Number            : 0.2
Security 0020 Statement         : Meteorcomm, LLC Proprietary and Confidential
Security 00202                  : Do Not Distribute
Headline                        : radios installation operation
Page Layout                     : OneColumn
Page Count                      : 17

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