Prism TM Teletrac Prism TM Information and Installation Desired Learning Outcomes At the conclusion of this module you will: Know the physical components that make up a Prism TM installation Know the current feature set of the Prism TM Know the components and processes used to acquire and transmit Prism TM information Know the requirements and processes to install and test a Prism TM
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Teletrac, Inc. - Prism TM Information and Installation Guide Table of Contents Introduction .................................................................................................................................................. 7 Physical characteristics ................................................................................................................................ 7 PRISM TM .........................................................................................................
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Teletrac, Inc. - Prism TM Information and Installation Guide INTRODUCTION Welcome to Teletrac’s Prism TM Information and Installation Guide. The goal of this guide is to give you an understanding of how the Prism TM functions and how the different systems it uses function, as well as, how to install the Prism TM itself.
Teletrac, Inc. - Prism TM Information and Installation Guide ANTENNAS The Prism TM uses a hidden combo antenna or roof mount combo antenna. In the future there will be more antenna options once the physical connector has changed. Combo Hidden Antenna Roof Mount combo Antenna PERIPHERALS MDT The Prism TM is designed to use the same peripherals or accessories that the RF and CDPD VLU uses. In addition to the same peripherals, the Prism TM currently has two inputs and two outputs.
Teletrac, Inc. - Prism TM Information and Installation Guide --------------Unit Two-------------THE GPS AND GPRS SYSTEMS There are two systems that the Prism TM uses outside of the Teletrac system. One is the Global Positioning System, more commonly called GPS and the other is the General Packet Radio System otherwise known as GPRS. The following pages will give you a basic introduction to where these systems came from as well as how they work.
Teletrac, Inc. - Prism TM Information and Installation Guide 4. Along with distance, you need to know exactly where the satellites are in space. High orbits and careful monitoring are the secret. 5. Finally you must correct for any delays the signal experiences as it travels through the atmosphere. Step 1: Triangulating from Satellites Improbable as it may seem, the whole idea behind GPS is to use satellites in space as reference points for locations here on earth.
Teletrac, Inc. - Prism TM Information and Installation Guide EXTRA MEASUREMENT CURES TIMING OFFSET If everything were perfect (i.e. if our receiver's clocks were perfect) then all of our satellite ranges would intersect at a single point (which is our position). But with imperfect clocks, a fourth measurement, done as a cross-check, will NOT intersect with the first three. So the receiver's computer says "Uh-oh! There is a discrepancy in my measurements. I must not be perfectly synced with universal time.
Teletrac, Inc. - Prism TM Information and Installation Guide GETTING THE MESSAGE OUT Once the DoD has measured a satellite's exact position, they relay that information back up to the satellite itself. The satellite then includes this new corrected position information in the timing signals it's broadcasting. Step 5: Correcting Errors ROUGH TRIP THROUGH THE ATMOSPHERE First, one of the basic assumptions we've been using throughout this tutorial is not exactly true.
Teletrac, Inc. - Prism TM Information and Installation Guide ROUGH TRIP ON THE GROUND Trouble for the GPS signal doesn't end when it gets down to the ground. The signal may bounce off various local obstructions before it gets to our receiver. This is called multipath error and is similar to the ghosting you might see on a TV. Good receivers use sophisticated signal rejection techniques to minimize this problem.
Teletrac, Inc. - Prism TM Information and Installation Guide Intentional Errors! As hard as it may be to believe, the same government that spent $12 billion to develop the most accurate navigation system in the world can cause errors by intentionally degrading its accuracy. The policy is called "Selective Availability" or "SA" and the idea behind it is to make sure that no hostile force or terrorist group can use GPS to make accurate weapons.
Teletrac, Inc. - Prism TM Information and Installation Guide packets can originate from mobile devices and travel to external networks, such as the Internet or privately connected intranets. IP packets from external networks will reach mobile devices, even when moving. GPRS doesn't care what protocols operate above IP. This indifference enables all standard Internet protocols to operate, including TCP, UDP, HTTP, Secure Sockets Layer (SSL), and IPSec.
Teletrac, Inc. - Prism TM Information and Installation Guide there, the NCC contacts the customer’s vehicles via the Internet. The vehicles that use GPS to determine their location send that information directly to the NCC and it is in turn sent back to the eClient workstation. The GPS receiver built into the Prism TM works to determine the location of itself. As long as the receiver is able to see enough satellites it can tell the Prism TM where it is.
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Teletrac, Inc. - Prism TM Information and Installation Guide --------------Unit Three-------------PRISM TM FUNCTIONALITY The Prism TM is designed to behave the same way as the VLUplus unit and have the same features available. However, the Prism TM is not as programmable as the VLUplus. Instead of having a script, the Prism TM has a hard coded set of instructions that can have some small configuration changes.
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Teletrac, Inc. - Prism TM Information and Installation Guide --------------Unit Four-------------FEATURE COMPARISON Following is a chart to allow you to quickly see each of the features followed by a description of the feature. The chart and feature descriptions are broken down into RF VLU, VLUplus and Prism TM features. We will also go over how these features will be implemented to the field.
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Teletrac, Inc. - Prism TM Information and Installation Guide TM, the unit changes it’s own schedule through the condition of the vehicle and doesn’t require a message with a status change be sent to the workstation in order to change it’s location schedule. Also, since a location schedule can also be stopped due to the vehicle’s condition (Ignition off and Not moving), a lot of unnecessary locates and locations requests are eliminated thereby, reducing airtime usage.
Teletrac, Inc. - Prism TM Information and Installation Guide For Example In Motion detection < 4 mph 6 mph< The Prism TM will be capable of detecting when the vehicle is stationary or moving with +/- 1 mph accuracy. Upon Stationary In Motion detecting either of the events, the Prism TM can send messages or begin timers. The ultimate goal of this feature is to eliminate locations unless the vehicle is moving or the ignition is on, which will save location units. (Min.
Teletrac, Inc. - Prism TM Information and Installation Guide In addition, since the GPS Receiver is locating itself continually, the Prism TM would send a message with the exact time of the event happening. This would eliminate the 15-minute error factor in Fleet Director. There are a maximum of three (3) zones that can be configured into each unit. hys·ter·e·sis (h s t -r s s) n., pl. hys·ter·e·ses (-s z.
Teletrac, Inc. - Prism TM Information and Installation Guide for Y hours (this message must be set up in Fleet Director as a message for now). Once the Prism TM has gone to sleep it is unreachable until the operating conditions change or it is time to wake up. If the unit wakes up and determines that the operating conditions have not changed it will send out the same message as above. In order to keep a unit awake, the operating conditions must change.
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Teletrac, Inc. - Prism TM Information and Installation Guide --------------Unit Five-------------PRISM TM INSTALLATION INSTRUCTIONS This unit covers the installation of the PRISM TM. We will take a look at the equipment and walk through a typical installation. As a note, this section does not cover the programming of the PRISM TM. NOTE: This section discusses a typical installation in a step-by-step fashion. Please e-mail the Field Service group for questions concerning special installations.
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Teletrac, Inc. - Prism TM Information and Installation Guide Also, kinks or tight knots in the antenna cable can cause problems that will not allow the PRISM TM to operate. When laying out the antenna cable, care should be taken so that the cable will not be subjected to crushing or strain. No Blockage above 5° Examples of good and poor GPS antenna placement NOTE: To insure that Hidden Combo – ARC antenna will function properly, mount the antenna’s base (large flat side) against a metal surface.
Teletrac, Inc. - Prism TM Information and Installation Guide PRISM TM INSTALLATION PROCEDURES Once you have all your tools in order and have planned the location of all the devices, you are ready to install the unit. Following are the steps for two types of installations, replacement of an existing VLUplus OR Prism and installation of a new PRISM TM. Replacing a VLUplus with a PRISM TM You can use all the same wiring and only need to switch out the unit itself.
Teletrac, Inc. - Prism TM Information and Installation Guide 5. Connect the PRISM TM wiring harness as recommended below. For safety, remove fuse until installation is complete. Never tap into existing power or ignition wires used from other aftermarket devices. Ground – Locate chassis ground within one (1) foot of the PRISM TM placement. If chassis has sound absorbent materials, scrape materials and/or paint until you reach clean metallic surface. Always use a star washer when attaching to chassis ground.
Teletrac, Inc. - Prism TM Information and Installation Guide SWAPPING OUT A PRISM TM 1. 2. 3. 4. 5. 6. 7. 8. 9. 34 Locate the current PRISM TM and disconnect the main power to it at the power source. Disconnect the wiring harness from the VLU. Disconnect the antenna(s). Install the new PRISM TM; this should be a floating unit from van stock. Insure the existing harness has all the required wires soldered or crimped for reliability and connect the harness to the new PRISM TM. Connect the antenna(s).
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Teletrac, Inc. - Prism TM Information and Installation Guide --------------Unit Six-------------PRISM TM ADMINISTRATION & PROVISIONING Administrative Procedures NEW ORDERS 1. CAR does the Site Survey with the customer. 2. The Administrator places the order in TOPSS. 3. The warehouse will receive picking ticket. 4. The warehouse provisions and ships Prism TM order to the metro. 5. The VSR installs the equipment. 6. Help Desk program units over the air if needed. 7.
Teletrac, Inc. - Prism TM Information and Installation Guide Provisioning Procedures 1. Distribution receives equipment and SIMs into inventory. 2. Distribution stages equipment and SIMs for QA Technician. 3. QA Technician assembles equipment: a. b. c. d. e. Scan SIM & unit numbers with bar code reader. Generate stickers with SIM number on it for the unit, vehicle and paperwork. Place SIM in unit and place coresponding SIM sticker on the unit. Repackage assembled units and stickers.
Teletrac, Inc. - Prism TM Information and Installation Guide Appendix These pages may be updated or added to at any time. Please check the Ops Web for the most current information.
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Teletrac, Inc. - Prism TM Information and Installation Guide Appendix A APPENDIX A – AN INTRODUCTION TO GLOBAL POSITIONING SATELLITE SYSTEMS Global Positioning Systems - A Primer Navigation and positioning are crucial to so many activities and over the years all kinds of technologies have tried to simplify the task including Teletrac's RF system. The U.S. Department of Defense (DoD) decided the U.S. military needed a super-precise form of worldwide positioning.
Teletrac, Inc. - Prism TM Information and Installation Guide Step 1: Triangulating from Satellites Improbable as it may seem, the whole idea behind GPS is to use satellites in space as reference points for locations here on earth. That's right, by very, very accurately measuring our distance from three satellites we can "triangulate" our position anywhere on earth. Forget for a moment how our receiver measures this distance. We'll get to that later.
Teletrac, Inc. - Prism TM Information and Installation Guide So by ranging from three satellites we can narrow our position to just two points in space. To decide which one is our true location we could make a fourth measurement. But usually one of the two points is a ridiculous answer (either too far from Earth or an impossible velocity) and can be rejected without a measurement. A fourth measurement does come in very handy for another reason however, but we'll tell you about that later.
Teletrac, Inc. - Prism TM Information and Installation Guide But assuming we have precise clocks, how do we measure travel time? To explain it let's use a goofy analogy: Suppose there was a way to get both the satellite and the receiver to start playing "The StarSpangled Banner" at precisely 12 Noon. If sound could reach us from space (which, of course, is ridiculous) then standing at the receiver we'd hear two versions of "The Star-Spangled Banner," one from our receiver and one from the satellite.
Teletrac, Inc. - Prism TM Information and Installation Guide Step 3: Getting Perfect Timing If measuring the travel time of a radio signal is the key to GPS, then our stop watches had better be darn good, because if their timing is off by just a thousandth of a second, at the speed of light, that translates into almost 200 miles of error! On the satellite side, timing is almost perfect because they have incredibly precise atomic clocks on board.
Teletrac, Inc. - Prism TM Information and Installation Guide Step 4: Knowing Where a Satellite is in Space In this tutorial we've been assuming that we know where the GPS satellites are so we can use them as reference points. But how do we know exactly where they are? After all they're floating around 11,000 miles up in space. A HIGH SATELLITE GATHERS NO MOSS That 11,000 mile altitude is actually a benefit in this case, because something that high is well clear of the atmosphere.
Teletrac, Inc. - Prism TM Information and Installation Guide GETTING THE MESSAGE OUT Once the DoD has measured a satellite's exact position, they relay that information back up to the satellite itself. The satellite then includes this new corrected position information in the timing signals it's broadcasting. So a GPS signal is more than just pseudo-random code for timing purposes. It also contains a navigation message with ephemeris information as well.
Teletrac, Inc. - Prism TM Information and Installation Guide There are a couple of ways to minimize this kind of error. For one thing we can predict what a typical delay might be on a typical day. This is called modeling and it helps but, of course, atmospheric conditions are rarely exactly typical. Another way to get a handle on these atmosphere-induced errors is to compare the relative speeds of two different signals.
Teletrac, Inc. - Prism TM Information and Installation Guide If it picks satellites that are widely separated the circles intersect at almost right angles and that minimizes the error region. Good receivers determine which satellites will give the lowest GDOP. INTENTIONAL ERRORS! As hard as it may be to believe, the same government that spent $12 billion to develop the most accurate navigation system in the world is intentionally degrading its accuracy.
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Teletrac, Inc. - Prism TM Information and Installation Guide Appendix B APPENDIX B – TELETRAC PRISM TM ANTENNAS Teletrac has approved 5 antennas compatible with the Prism TM. Two of these designs are GPS only and need to be installed along with the GPRS only antenna. The other two have both GPS and GPRS antennas. GPS Roof Mount Antenna - Part # 335-0054 This antenna mounts on the outside of the vehicle trough a 5/8-inch perforation of the roof.
Teletrac, Inc. - Prism TM Information and Installation Guide CDPD/GPRS 3dB Antenna - Black Part # 335-0053 – Cable & Mast Part # 335-0058 – Mast Only Part # 335-0083 – W/ 4 Bolt Spring, Special Order This antenna is the most common CDPD/GPRS antenna used today due to its low loss cable, elevated gain mast and low price. The antenna features a “M” mount which requires a ¾’’ perforation. There is no need of adjustments and the mast will work on any 900 MHz antenna mount currently used by us.
Teletrac, Inc. - Prism TM Information and Installation Guide Appendix C APPENDIX C – INSTALLATION EQUIPMENT Metro Equipment Each metro should have the following available on site for the installers. • Eltron Printer – for printing labels to affix to units (TLP 2242 Series or equivalent) Installer Equipment Each installer should have the following equipment in their vanstock.
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Teletrac, Inc. - Prism TM Information and Installation Guide Appendix D APPENDIX D – HOW MESSAGES ARE USED IN SCRIPTS Message Code Usage General NOTE: The term VLU means all Teletrac location units. The purpose of this paper is to give guidelines on how to standardize message code usage for Fleet Director, MDTs and VLUs. The standardization of message codes is intended to help make it easier to develop and support customer applications.
Teletrac, Inc. - Prism TM Information and Installation Guide few codes with similar function or features rather than being expected to handle all codes with different with a variety of possible functions or features. Code standardization should take into consideration both inbound and outbound message usage. It should also consider the limitations within the System, the VLU, the MDT, and the workstation software that force some messages to be reserved or identified for special usage.
Teletrac, Inc. - Prism TM Information and Installation Guide Table 1 - Standardized Inbound Message Code Usage IB Codes 0 Definition S&F Location 11-50 MDT inbound canned message 51-58 VLU input messages (i.e. Ign, Alert, etc.) 59-70 VLUplus & PRISM TM Zone Entry and Exits messages 71-79 VLUplus PEG script status messages 80-89 90-99 Comments VLUplus & PRISM TM uses this message code for S&F locations. The definition of these messages depends on customer requirements.
Teletrac, Inc. - Prism TM Information and Installation Guide The following table shows how the outbound message codes could be allocated. Table 2 - Standardized Outbound Message Code Usage OB Code Definition 1-6 MDT Output Control Messages 7-10 PEG Control Message 11-50 51-79 MDT OB Canned messages PEG Status Requests and Control 80-143 144-255 VLU Output Control Messages undefined 1622-0300 B1 3/18/04 Comments 1-3=Output 1 On/Off/Pulse 4-6= Output 2 On/Off/Pulse PEG operation control messages (i.
Teletrac, Inc. - Prism TM Information and Installation Guide Final Comments The key to good standardization is to keep similar message grouped together and to make the code usage intuitive. Unfortunately sometimes intuitive and grouping don’t mix. The best standardization method would never use the same message code twice however we don’t have that luxury due to limited code availability (especially on the inbound messages).
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Teletrac, Inc. - Prism TM Information and Installation Guide Appendix F APPENDIX F – FCC STATEMENT Statement according FCC part 15.19 FCC identifier has to be on the equipment This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Statement according FCC part 15.
Teletrac, Inc. - Prism TM Information and Installation Guide Appendix G APPENDIX G - SAFETY INFORMATION Simple Guidelines Please follow these guidelines when configuring or using the Prism TM. Violating these guidelines may be dangerous, illegal or otherwise detrimental. Further detailed information is provided in this manual. Do Not Operate Where Prohibited Do not allow the Prism TM to operate wherever wireless phone use is prohibited or when doing so may cause interference or danger.
Teletrac, Inc. - Prism TM Information and Installation Guide Detailed Safety Information Exposure to Radio Frequency Signals The Prism TM is a low power radio transmitter and receiver. When it is ON, it receives and also sends out radio frequency (RF) signals. In August 1996, the Federal Communications Commissions (FCC) adopted RF exposure guidelines with safety levels for hand-held wireless phones. Those guidelines are consistent with safety standards previously set by both U.S.
Teletrac, Inc. - Prism TM Information and Installation Guide Vehicles RF signals may affect improperly installed or inadequately shielded electronic systems in motor vehicles. Check with the manufacturer or its representative regarding the vehicle. Also consult the manufacturer of any equipment that has been added to the vehicle. Posted Facilities Disable operation of the Prism TM by removing the battery pack in any facility where posted notices prohibit the use of wireless phones or two-way radios.
Teletrac, Inc. - Prism TM Information and Installation Guide Overview Introduction This manual covers the Prism TM operating on 900 MHz, 1800 MHz and 1900 MHz GSM networks. As used in this manual, the term GSM shall include any and all of these frequencies. Regulatory Approvals CE The Prism TM product complies with the essential requirements of the R&TTE Directive 199/5/EC as stated by the EC Declaration of Conformity (CE0681) and the EC R&TTE Type Examination Certificate.
