Retransmission Solution

0681-EX-CN-2018 Applicant Eligibility

HP Inc

2018-09-24ELS_216658

GLI-METRO GPS Smart Controller USER GUIDE


GLI-METRO Quick Set Up Active Antenna Surge Protector Roof Entry Passive Antenna Coaxial Cable Surge Protector GLI- Metro Earth ground 6 gauge wire or GPS Signal larger Handheld GPS device Inside of Building 1. Mount the Receive Antenna on the roof at the location with the clearest view of the sky (this may not be the highest point). 2. Attach the coax cable to the Receive Antenna and run the cable through the roof or other convenient location into the building. 3. Attach the Passive Antenna to the output side of the GLI-METRO. 4. Mount the GLI-METRO inside the upper area or region of the building. Rotate the device on the mount, so that the transmitting antenna faces out into the facility. (Avoid facing antenna outdoors, through doors, windows, skylights, etc. 5. Connect the coax cable to the input connector (left side) of the GLI-METRO. 6. Connect the GLI-METRO to the power supply. Depress the Power button for 2 seconds to enable system power. Once the power is on, the system will begin transmitting the GPS signals within 10 seconds if the system is fully operational. 7. Hold a hand held GPS device at the far end of the area requiring GPS coverage. Adjust power level of GLI-METRO up until handheld device will see 5 satellites. DO NOT TURN UP POWER ANY MORE THAN NECESSARY. LESS IS MORE!! Call GPS Source at (719) 561-3680 with Questions.

USER GUIDE GLI-METRO GPS Smart Controller Version 1.0 Revision A January 2011 Doc. Num.: 060-DOC-UMN-AAA-AF-001B

Corporate Office MERCHANTABILITY OR FITNESS FOR A GPS Source, Inc. PARTICULAR PURPOSE, STATUTORY OR 64 N. Mission Drive OTHERWISE. THIS WARRANTY GIVES YOU Pueblo West, CO 81008 SPECIFIC LEGAL RIGHTS, WHICH MAY VARY USA FROM STATE TO STATE. IN NO EVENT SHALL www.gpssource.com GPS SOURCE BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL Headquarters: +1 719-561-9520 DAMAGES WHETHER RESULTING FROM USE, Technical Support: +1 719-561-3680 MISUSE, INABILITY TO USE THIS PRODUCT Fax: +1 719-565-0890 OR FROM DEFECTS IN THE PRODUCT. SOME Email: info@gpssource.com STATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, Legal Notices SO THE ABOVE LIMITATIONS MAY NOT APPLY © 2011, GPS Source, Inc. All rights reserved. TO YOU. The Bluetooth word mark and logos are owned by How To Obtain Warranty Service the Bluetooth SIG, Inc. Call the GPS Source Customer Support Department (719) 561-9520 for a returned merchandise Release Notice authorization (RMA) number. The unit should be This is the January 2011 release (Revision A) of securely packaged with the RMA number clearly the GLI-METRO GPS Smart Controller User Guide, marked on the outside of the package and sent Document Number 060-DOC-UMN-AAA-AF-001B. It freight prepaid to GPS Source. A copy of the applies to version 003 of the GLI-METRO firmware. original sales invoice is required as the proof of purchase for warranty repairs. GPS Source retains Limited Warranty Terms and Conditions the exclusive right to replace the unit or offer a full refund of the purchase price at its sole discretion. Product Limited Warranty SUCH REMEDY SHALL BE YOUR SOLE AND GPS Source Corporation warrants its product free EXCLUSIVE REMEDY FOR ANY BREACH OF from defects in materials and manufacture for one WARRANTY. year from the date of purchase. GPS Source will, at its sole option, repair or replace any components Warranty Exclusions and Disclaimer that fail in normal use. Such repairs or replacement This Product limited warranty shall only apply in the will be made at no charge to the customer for parts event and the extent that (i) the Product is properly and labor. The customer is, however, responsible and correctly installed, configured, interfaced, for any transportation costs. This warranty does not maintained, stored, and operated in accordance cover failures due to damage or defects caused with this manual and specifications, and; (ii) the in whole or in part by reason of fire, explosion, Product is not modified or misused.or (iii) flood, acts of God, extreme weather conditions, damage caused by: accident, lightning or other abuse, vandalism, negligence, misuse, accidents or electrical discharge, fresh or salt water immersion unauthorized alteration or repairs. or spray; or exposure to environmental conditions for which the Product is not intended. GPS Source THE WARRANTIES AND REMEDIES CONTAINED does not warrant or guarantee the results obtained HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL through the use of the Product. OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OF

TABLE OF CONTENTS QUICKSTART.......................................................................................................i Chapter 1 Introduction..................................................................................................1 About the GLI-METRO......................................................................1 Related Information (Contacts)..........................................................2 Chapter 2 Overview......................................................................................................3 System Description............................................................................4 Basic Functions.................................................................................4 System Block Diagram......................................................................5 Keypad and Display...........................................................................6 GLI-METRO User Interface...............................................................6 GLI-METRO Power...........................................................................7 Equipment/Hardware Required.........................................................7 Antennas...........................................................................................8 Mounting Hardware...........................................................................8 Chapter 3 Installing the GLI-METRO.......................................................................... 11 Antenna Mounting...........................................................................12 Cable & Routing..............................................................................12 Surge Suppressor Location.............................................................13 GLI-METRO Mounting Requirements.............................................14 GLI-METRO Typical Configuration..................................................15 Transmit Power Level......................................................................17 Chapter 4 Configuring the GLI-METRO......................................................................19 Button Functions........................................................................................20 Appendix A Serial Port Commands...............................................................................29 Appendix B Troubleshooting.........................................................................................33 Fault Codes................................................................................................36 Glossary of Terms.............................................................................................38


Introduction Chapter 1 INTRODUCTION Welcome to the GLI-METRO System User Guide. Features This manual describes how to set up and use the GLI-METRO GPS Smart Controller. • Precise control over output signal level • Passes L1 (L1/L2 optional) Even if you have used other Global Navigation • High frequency selectivity Satellite System (GNSS) products before, GPS • Conditions signal/prevents changes in Source recommends that you spend some time performance reading this manual to learn about the special • Oscillation detection and mitigation features of your GPS Smart Controller. • Antenna monitor with alarm • Bluetooth available About the GLI-METRO The GLI-Metro has a built in GPS receiver that measures the power on the output connector so that the GPS signal level from the device can be known exactly. It has been designed with a built in testing feature, that allows each hardware component to be monitored, confirming that the system is fully operational. It is controlled either by push buttons on the front user input panel and/or via an optional serial port interface. GLI-METRO User’s Guide Page 7

Introduction Related information Sources of related information include the following: • Help - GPS Source offers tech support for the GLI-METRO via email at support@gpssource.com, or phone: +1 719-561-3680. • Training - Consider a training course to help you use your GLI-METRO system to its fullest potential. For more information, go to the GPS Source website at www.gpssource.com/services. Technical Support If you have a problem and cannot find the information you need in the product documentation, contact us at www.gpssource.com/contact. Page 8 GLI-METRO User’s Guide

Overview Chapter 2 GLI-METRO Overview This chapter introduces the GLI-METRO GPS Features: Smart Controller. The GPS Smart controller makes it easy to set up a system that allows one to receive • Serial Port GPS signals inside a building or structure. • Input Connector • Power Button (Options) • User Input Display • Transmit and Fault Indicator Lights • ERP Signal Level Adjustment • Brightness Level Adjustment • Output Connector Figure 1. GLI-METRO GPS Smart Controller GLI-METRO User’s Guide Page 9

Overview System Description Distributes Signals: The GLI-METRO may be The GLI-METRO receives the L1 GPS Signal combined with additional GPS signal splitters, and from a 3.4” active antenna that is usually placed retransmission antennas to cover a larger area. on the outside of a hangar facility or large building Performs Built in Test (BIT): The GLI- (preferably highest point on the roof). METRO performs a continuous built in test function, monitoring the status of coaxial cables to and from Basic Functions the device, as well as the GPS signal levels and Amplifies the Signals: The GLI-METRO signal quality within the device itself. amplifies the GPS signals to a level for retransmission from the receive antenna that is Provides Diagnostic Port: The GLI-METRO sufficient for signal coverage throughout any small has a diagnostic port that can be monitored by way to large indoor space. of a laptop computer RS232 port in order to test and determine the status of the system (Bluetooth Employs Power Control: The GLI-METRO compatible). employs a power control function which measures the output power of the GPS signals from the Provides Real-time Status Signal: The device and controls the gain based on the user’s GLI-METRO provides a status signal (XMIT OR selection on the input panel. This ensures the FAULT) to the user input panel. necessary radiated power level is achieved within Receives Power: The GLI-METRO receives 16 the designated facility. VDC from a standard 110 VDC wall plug power. Page 10 GLI-METRO User’s Guide

Overview 3.445” Receive Antenna Coax Cable 3.445” Transmit Antenna Input GLI-METRO Output 110 VAC to 240 VAC Power Adapter Figure 2. GLI-METRO System Block Diagram GLI-METRO User’s Guide Page 11

Overview Keypad and Display Input Connector Power Button User Input Display Transmit and Fault Indicator Lights ERP Signal Level Adjustment Brightness Level Adjustment Output Connector RS232 Port GLI-METRO User Interface Option 2: Power On/Off. Once connected to a power source, depress the Power button Input Connector: Connects device to active for 2 seconds to enable system power. antenna via cable. Once the power is ON, the system will begin transmitting the GPS signals within 10 seconds Power Button: There are two options for powering. if the system is fully operational. Although The GLI-METRO will ship one of the options. the System will begin transmitting within 10 seconds, it may require as much as 4 minutes Option 1: “Power Constantly On. Once to become fully initialized. connected to a power source, the GLI-METRO will power ON and remain ON, until the device User Input Display: Display will illuminate along with is disconnected from the power source. the user input buttons. The DISPLAY indicates the The system will begin transmitting the GPS power level/brightness level of the GLI-METRO. signals within 10 seconds if the system is fully The DISPLAY will also indicate any faults detected operational. Although the System will begin by the GLI-METRO. transmitting within 10 seconds, it may require as much as 4 minutes to become fully initialized. If the FAULT light remains illuminated after the system has initialized, then revisit the system installation to ensure all system components have been properly installed/connected. Page 12 GLI-METRO User’s Guide

Overview Transmit and Fault Indicator Lights: Will GLI-METRO Power communicate health of system. Input Power Requirements XMIT LED indicates the transmit status of the The GLI-METRO operates on 16 volts DC input from GLI-METRO. If XMIT is illuminated, the GLI- standard 110 AC wall plug power transformer. METRO is transmitting the GPS signals through all operational GPS Retransmission Antennas. Power Options If XMIT is flashing, the GLI-METRO is acquiring See page 12. satellites. FAULT LED indicates the status of the automated Built In Test (BIT) functionality. If FAULT is illuminated, there exists some anomaly within the GLI-METRO which will be shown on the display. Go to page 36 for more information. ERP Signal Level Adjustment: The POWER LEVEL buttons are used to set the output power of the GLI-METRO. The range of output power level adjustment is -85dBm to -65dBm. . Brightness Level Adjustment: The BRIGHTNESS buttons are used to adjust the illumination intensity of the front panel of the GLI-METRO. Note: depressing the down button beyond its lowest setting will turn off the user input panel lights; however, the unit will still operate. This setting is not recommended. Output Connector: Connects device to passive antenna. Serial Port: The GLI-METRO can be controlled and monitored via a RS232 serial port. The GLI-METRO is designed so that a controlling computer can, with terminal emulation software, e.g. HyperTerminal, send commands and receive information. A user can type specific commands, rather than selecting commands from a predefined user interface. See Appendix A for further information about RS232 Serial Interface References. GLI-METRO User’s Guide Page 13

Overview Equipment/Hardware Other Common RF Connectors Required This GLI-METRO unit can be purchased as a standalone without antennas or cabling. But, it will require antennas and cabling in order to become a working unit. If you are replacing an existing GPSRKXLV device, your existing hardware is backwards compatible. If you purchased the GLI- METRO as a standalone unit, instead of a kit, all of the requisite antennas, cabling, brackets and SMA Connectors (Male - Female) mounts can be purchased through GPS Source or one of our resellers. Call (719) 561-9520 to discuss your needs. When sourcing material, make sure you get the right connectors for your cabling and antennas. The standard GLI-METRO will ship with a female N connector on the input and a male N connector on BNC Connectors (Male & Female) the output. See example below: SMC Jack SMB Jack N Connectors (Male - Female) TNC Connectors (Male & Female) Page 14 GLI-METRO User’s Guide

Overview Antennas Mounting Hardware The GLI-Metro will be provided with standard GPS Active Antenna Gimbal adjustable mounting brackets/ swivel The GPS active antenna includes a low noise mount. Other various mounting hardware are amplifier (LNA). The LNA is necessary to make available depending on the system configuration or up for the signal loss that is inherent in all antenna application. cables. The GPS active antenna may be mounted on a pole-mount bracket, stand-alone or other suitable mount. GPS Passive Antenna The GPS passive antenna receives the L1 GPS signal from the GLI-METRO and transmits the GPS signal throughout the facility or area. The GPS antennas also include custom circuitry to enable the GLI-METRO to monitor the operational status of the individual antennas. GLI-METRO User’s Guide Page 15

Overview Page 16 GLI-METRO User’s Guide

Setup & Installation Chapter 3 Installing the GLI-METRO This chapter describes best practices for setting Features: up the equipment, and outlines the precautions that you need to take to protect the equipment. • Antenna Mounting • Cable Routing • Surge Protection • Repeater Mounting • Setup Guidelines • Transmit Power Level GLI-METRO User’s Guide Page 17

Setup & Installation Antenna Mounting Cable & Routing • GPS Source recommends a site as free • Use plenum cable where required by fire as possible from interference, where the codes antenna has a clear view of the sky and where there are no obstructions above 10° • Provide support for cables to limit tension elevation. • Maintain minimum bend radius of cable • GPS Source recommends that you install lightning protection equipment for your • Remove any twist in coaxial cable to avoid GLI-METRO. We recommend the CO-PRO kinks Surge/Coax protector in the antenna feed line as well as appropriate safety grounding. • Never pull cable by the ends Protect any communications and power • Provide proper torque of connectors, too lines at building entry points. If you use loose poor connection, too tight causes other antennas or aerials, such as a radio connector damage modem that distributes real-time correction messages, consider protecting those • Never step on or drive over coaxial cables, antennas as well. crushed dielectric causes impedance mismatch • Never route lightning inside structure (See • Always use cabling with soldered center pins illustration on next page) for the RF connectors (NOT crimp only) • Avoid vertical roof penetration wherever possible, this will help to avoid leaks. • Avoid sky lights and windows where the output of the repeater can be directed at the receive antenna and cause oscillation. • Avoid areas where snow and ice accumulate, which limit ability of antenna to receive signal • Avoid locating near high power transmitters • Weather proof all coaxial connections Page 18 GLI-METRO User’s Guide

Setup & Installation Surge Suppressor Properly Located This will route any energy from a lightning strike to ground before it enters the building Path of Lightning Surge Supressor Roof Antenna 1.0187 in Surge Suppressor Improperly Located This will route any energy from a lightning strike INTO your building Path of Lightning Roof Antenna Surge Supressor 6 Gauge Copper Wire to Earth GLI-METRO User’s Guide Page 19

Setup & Installation GLI-METRO Repeater Mounting Mounting Requirements • Higher mounting is better, less chance for The GLI-METRO should be mounted in the upper masking area or region of a given facility that is easily accessible or can be reached by a lift. Rotate the • Try to minimize reflections device on the gimbal mount, so that the transmitting antenna faces out into the facility. • Transmit antenna can be remotely located from the GLI-METRO using the cable offset mode • Avoid heat sources Page 20 GLI-METRO User’s Guide

Setup & Installation GLI-METRO Typical Configuration Before you mount the receive antenna, plan the best The following diagram depicts a typical GPS Smart location for the antenna. Try to determine a location Controller system. This is by no means standard, that will allow you a clear line of sight to satellite signals. as each system can have different combinations of GPS Source recommends a site as free as possible from components to suite the individual requirements of each interference, where the antenna has a clear view of the installation. But there are common components in most sky and there are no obstructions above 10° elevation. GLI-METRO networked systems. If there are obstructions above 10°, or large metallic objects nearby, the antenna may be limited in collecting Each system will normally begin with a roof or receive accurate data from enough satellites. antenna or GPS signal source. In order to achieve and Antenna cabling maintain a suitable system noise figure, the receive antenna wlll usually be an active component, i.e. have Many GLI-METRO installations have unique cabling an integrated LNA (low noise amplifier/or low noise requirements. Depending on the available infrastructure, preamplifier). An LNA’s active circuitry requires power you may need to mount the antenna a substantial and the standard way to provide power is a DC voltage distance from the receiver. The GLI-METRO can via the center conductor of the coaxial cable. operate at an input signal level of -115 dBm. The degree of loss in a coaxial cable depends on the frequency of the signal passing through it. Refer to the table on page 18 for more information. Diagram of Generic GPS Smart Active Antenna Controller System Surge Protector Roof Entry Coaxial Cable GLI- Metro Passive Antenna Surge Protector Earth ground 6 gauge wire or larger GLI-METRO User’s Guide Page 21

Setup & Installation Setup Guidelines Placing the Active (Receive) Antenna Outdoors When you set up the receiver, follow these Before you mount the antenna, you should plan guidelines. the best location for the antenna. GPS Source recommends a site as free as possible from Environmental Conditions interference, where the antenna has a clear view of The GLI-METRO does NOT have waterproof the sky and where there are no obstructions above housing. You should take reasonable care to keep 10° elevation. the unit dry Connecting the GLI-METRO to the Receive Antenna Avoid exposing the device to extreme The GLI-METRO will be connected to the receive environmental conditions, such as: antenna, with a cable. GPS Source recommends • Water the LMR240 (up to 100 feet). If you will be using • Heat greater than 65 °C (149 °F) more than 100 feet of cable, please see GPS • Cold less than -40 °C (-40 °F) Source website for link budget calculations or call • Corrosive fluids and gases (719) 561-9520. Lightning Protection GPS Source recommends that you install lightning protection equipment for your GLI-METRO. We recommend the CO-PRO Surge/Coax protector in the antenna feed line as well as appropriate safety grounding. Also, protect any communications and power lines at building entry points. If you use other antennas or aerials, such as a radio modem that distributes real-time correction messages, consider protecting those antennas as well. Page 22 GLI-METRO User’s Guide

Setup & Installation The Length and Type of Antenna Cabling Can Directly Affect the Quality of Signal Signal from the satellites -130dBm Active Antenna 35dB Gain 200’ RG-8 20dB Insertion Loss -65dBm output level Signal level at input to Metro - 115 dBm 100 ’ If cable to input antenna was any longer, then the signal would be If receiver was further away, the too weak signal would be less than the signal from the sky The length of the cable and the type of cable, can The GLI-METRO has an input dynamic range of affect the dynamic range of the GLI-METRO (or any 30dB, i.e. the input can vary from -115 min to -85 GPS device). The dynamic range is essentially the max. It has a output dynamic range of 20dB i.e., range of signal levels over which it can operate. The it can transmit from -85dm to -65dBm provided the low end of the range is governed by its sensitivity. input level is within the min and max level as shown While at the high end, it is governed by its overload above. or strong signal handling performance. GLI-METRO User’s Guide Page 23

Setup & Installation Transmit Power Level Lower power creates a better quality and safer Oscillation signal. Raising the power level too much is counter- Too much power can cause oscillation, significantly productive and can decrease signal reliability decreasing signal quality. This will be detected by the GLI-METRO, but needs to be resolved by turn- Too much power can cause: ing down the power. Oscillation can also be caused Reflections by the transmitting antenna and the receive antenna Overdrive Receivers being pointed in each other’s direction. Leakage outside structure Use only enough power to reach intended target. Avoid aiming the transmit antenna at a window or door Transmitted Power (L1 only) Range in Feet 10 20 30 40 50 60 70 80 90 100 -85 -131.1 -137.1 -140.6 -143.1 -145.1 -146.7 -148 -149.2 -150.2 -151.1 -84 -130.1 -136.1 -139.6 -142.1 -144.1 -145.7 -147 -148.2 -149.2 -150.1 -83 -129.1 -135.1 -138.6 -141.1 -143.1 -144.7 -146 -147.2 -148.2 -149.1 -82 -128.1 -134.1 -137.6 -140.1 -142.1 -143.7 -145 -146.2 -147.2 -148.1 -81 -127.1 -133.1 -136.6 -139.1 -141.1 -142.7 -144 -145.2 -146.2 -147.1 -80 -126.1 -132.1 -135.6 -138.1 -140.1 -141.7 -143 -144.2 -145.2 -146.1 -79 -125.1 -131.1 -134.6 -137.1 -139.1 -140.7 -142 -143.2 -144.2 -145.1 -78 -124.1 -130.1 -133.6 -136.1 -138.1 -139.7 -141 -142.2 -143.2 -144.1 -77 -123.1 -129.1 -132.6 -135.1 -137.1 -138.7 -140 -141.2 -142.2 -143.1 -76 -122.1 -128.1 -131.6 -134.1 -136.1 -137.7 -139 -140.2 -141.2 -142.1 -75 -121.1 -127.1 -130.6 -133.1 -135.1 -136.7 -138 -139.2 -140.2 -141.1 -74 -120.1 -126.1 -129.6 -132.1 -134.1 -135.7 -137 -138.2 -139.2 -140.1 -73 -119.1 -125.1 -128.6 -131.1 -133.1 -134.7 -136 -137.2 -138.2 -139.1 -72 -118.1 -124.1 -127.6 -130.1 -132.1 -133.7 -135 -136.2 -137.2 -138.1 -71 -117.1 -123.1 -126.6 -129.1 -131.1 -132.7 -134 -135.2 -136.2 -137.1 -70 -116.1 -122.1 -125.6 -128.1 -130.1 -131.7 -133 -134.2 -135.2 -136.1 -69 -115.1 -121.1 -124.6 -127.1 -129.1 -130.7 -132 -133.2 -134.2 -135.1 -68 -114.1 -120.1 -123.6 -126.1 -128.1 -129.7 -131 -132.2 -133.2 -134.1 -67 -113.1 -119.1 -122.6 -125.1 -127.1 -128.7 -130 -131.2 -132.2 -133.1 -66 -112.1 -118.1 -121.6 -124.1 -126.1 -127.7 -129 -130.2 -131.2 -132.1 -65 -111.1 -117.1 -120.6 -123.1 -125.1 -126.7 -128 -129.2 -130.2 -131.1 Page 24 GLI-METRO User’s Guide

Configuring GLI-METRO Chapter 4 Configuring the GLI-METRO The GLI-METRO features a keypad and display so that you can configure the device to fit your specific Features: needs • Button functions • Power button operations • Status Display • Setting up the GLI-METRO GLI-METRO User’s Guide

Configuring GLI-METRO Button Functions The GLI-METRO five buttons on the front panel. Use the buttons to turn the device on and off and to check or change unit settings. Button(s) Function Button(s) Function Turn on/off the device. To turn off the GLI- METRO, hold the power button for two Pressing and holding the BRT UP and seconds. BRT DN buttons for 3 seconds allows user to enter additional system gain for BRT high loss cables “CBL OS:#” Pressing and holding the LVL UP BRT buttons select desired setting and LVL DN buttons for 3 seconds 0 = no additional gain allows user to lock the power level LVL 5 = 5dB additional gain LVL buttons after selecting desired setting 3 seconds after last button press, the Y = User power level is locked input is accepted and system returns N = User power level is adjustable to normal operating mode 3 seconds after last button press, the input is accepted and “REMLVL:?” is displayed Y = User set power level will persist after a system reset N = User set power level will be 0 after system reset 3 seconds after last button press, the input is accepted and system returns to normal operating mode NOTE: Raising the power level too much is counter-productive and can decrease signal reliability GLI-METRO User’s Guide

Configuring GLI-METRO L2 Offset Mode Only for GLI-METRO with L2 option.. Button(s) Function Pressing and holding the BRT DN and LVL UP buttons for 3 seconds allows user to change the offset between L1 LVL BRT and L2 signal “L2OS:-#” LVL buttons select desired setting 0 = no offset between L1 and L2 signals -5 (default) = L2 signal is -5dB -10 = L2 signal is -10dB 3 seconds after last button press, the input is accepted and system returns to normal operating mode L2 offset mode is useful as a unit can oscillate on an L2 channel but will be fine on the L1 GLI-METRO User’s Guide

Configuring GLI-METRO GLI-METRO User’s Guide

Appendix A APPENDIX A Serial Port Commands The GLI-METRO features a keypad and display so that the device can be configured without using a computer. Unfortunately, the GLI-METRO is often mounted in an area that is not easily accessible. GPS Source addresses this issue by providing a serial port. This port allows full control of the device with a cable and a computer. A Bluetooth wireless transceiver option is also available. GLI-METRO User’s Guide Page 29

Appendix A GLI-METRO Serial Interface Reference Serial Port Configuration Command Mode The serial port comes configured from the factory set to operate In command mode, the unit can be controlled or operated by at 19200,N,8,1 ONLY! It will not operate at any other setting. sending specific commands as opposed to navigating menus There is no hardware handshaking and all that is needed is RX, via key strokes. Though there is nothing stopping a user from TX & GND. Some functions are only available via a serial port sending individual key strokes, i.e. characters programmatically control, e.g. setting the antenna current fault threshold level. and navigating menus, it is not needed or recommended. A command set is provided to execute functions directly, so the unit Port Hardware can be controlled by a machine or computer as in an automatic The control of the unit via the serial port is generally accomplished test setup. in one of two ways, command mode or terminal mode. Command Format Terminal Mode The commands are in the format where the first character is One can connect to the device using a standard terminal device always an asterisk followed by a three letter command (case or, a more likely scenario, a computer utilizing some terminal insensitive), followed by an equal sign and any required numeric emulation software such as Hyperterm, Terra Term, Kermit, etc. or character data. The unit can be operated with the down arrow keys and the enter All commands must be terminated by a carriage return character, keys in exactly the same manner as if one were pressing the i.e. 0x0d. buttons on the front panel of the device by navigating the menus and using the up, down arrow keys and enter key or equivalent For example, to set the attenuation level, the command is esc sequences. The device will echo the text to the serial port and ‘*ATT=00’, where 00 is some value between 0 and 63. (Note: in most case it will be the same as the front panel LCD or it will be Leading zeros are required for all numeric values, e.g. attenuation more verbose. level of one is ‘*ATT=01 not ‘*ATT=1’.) Note: This will set the level of attenuation directly without having to The letter “D” & “d” will also function as the down arrow key and navigate the menu system. If the command was accepted, the the letter “U” & “u” will function as the up arrow key. device will echo a prompt plus the three letter command and The terminal ESC sequences ESC[B] or 0x1B and then a 0x41 the equal sign and any numeric value that accompanied the will function as an up arrow key. command plus an OK. The terminal ESC sequences ESC[A] or 0x1B and then a 0x41 will function as an up arrow key. If the command ‘*ATT=63’ is accepted, then the device will echo (If there are any dinosaurs reading this these are VT100 terminal GPSS>ATT=63 OK (Note: The asterisk is not echoed!) If the escape sequences) command was not accepted, then the device will only echo the prompt GPSS>. Page 30 GLI-METRO User’s Guide

Appendix A Command Description Range Default Comments *STL Sets the desired signal level -86dBM to -85dBM This command sets the user controllable output of the device -65dBM attenuator and accomplishes the same thing as adjusting the level on the front panel. The minus sign is assumed when sending this command. *CON= Places the device into manual 0-1 0 Places the device into manual control control mode or removes it mode where the control loop is broken. The from calibration mode *RFG=,*ATT=, *GTN= commands will not be overruled/over ridden by the control loop. *ATT= Set attenuation level 00-68 Varies This sets the level of the attenuator which based on sets the overall gain (positive or negative) the input of the device from input to output. Note: it signal accomplishes the same thing as the RFG level command. Attenuation is a positive number and no leading plus or minus sign is needed. *RFG= Set amplifier gain -23 to +45 Varies This sets the overall gain of the device, similar based on to the ATT command. Plus or minus sign and the input leading zeros are required. Note: Unless in signal manual control mode, the control loop will level override this command. *BRT= Set the LCD backlight level 0-7 4 Default is 4 brightness *ANT= Turn on/off power to antenna 0-1 1 Turn ON/OFF power supply providing power to the antenna. Default is ON. *AFH= Antenna current fault high 0000-1023 516 This sets the high level current fault threshold threshold level i.e. any level above this value will cause a fault and remove power from the antenna. *AFL= Antenna current fault low 0000-1023 13 This sets the low level current fault threshold threshold level i.e. any level below this value will cause a fault to be reported. *GTN= Set the signal level to the 00-31 0 Controls the signal level seen by the GPS internal GPS receiver receiver. GLI-METRO User’s Guide Page 31

Appendix A Command Description Range Default Comments *DSN= Returns serial number A00000 ANNNNN Returns serial number. The return string will include the command and OK, e.g. “DSN=A12345 OK” *AVD= Returns antenna voltage N/A 00.00 Returns the antenna voltage. Format returned is two digits and two decimal places, e.g. AVD=05.45 OK *CLV= Returns the signal aver- N/A -85 Returns the signal strength at the output port. age strength from the GPS receiver *VER= Returns software version 000-999 N/A Three digit software revision *FOL= Fixed output level 0 to 3 0 0 = power level is unlocked and unit will not remember last power level after restart 1 = power level is locked and unit will not remember last power level after restart 2 = power level is unlocked and unit will remember last power level after restart 3 = power level is locked and unit will remem- ber last power level after restart . Page 32 GLI-METRO User’s Guide

Appendix B APPENDIX B Troubleshooting Use this appendix to identify and solve common In This Appendix: problems that may occur with the GLI-METRO. Please read this section before you contact • Reason for Cable Failure Technical Support. • Fault Isolation • Ways to Troubleshoot GLI-METRO User’s Guide Page 33

Appendix B GLI-METRO On/Off Power Fault Isolation Symptom: Unit will not turn off by depressing Power The first step to assessing the performance of a GPS Button. network is to determine what type of failure that is being experienced. Is the failure system wide or is the The GLI-METRO is configured to power one of two ways. failure isolated to an individual output or section of the If unit will not turn off, unit has not been configured with network. In general, the GLI-METRO is smart enough to determine what the failure is and communicate this to that option. See page 12. the user through a series of “fault codes”. These codes Common Cable Failures can be found on page viii. Most cable failures appear during installation or shortly thereafter, due to improper assembly or improper Components that comprise a GLI-METRO signal installation. Cable failures can occur any time during the distribution are sometimes powered individually via life of a network, but generally speaking, cable failures external sources. This has considerable implications in fixed installations will appear early on. On the other for diagnosing failures in a GPS network due to the hand, cables that are moved each day, e.g. those that dependency of some components that are powered by are connected to an antenna near a field coupler that other components. is used in a production test cell environment, can suffer many failures from fatigue due to strain and repetitive Isolated failures stress. If the failure is confined to a single leg or output, the diagnosis can be fairly straightforward, One can Reasons for Cable Failure: accomplish this by swapping out similar components. With the GLI-METRO, this will normally involve swapping Installation out similar cabling. - Improper assembly Improper Installation - failure to install waterproofing can lead to fungus growth and/or corrosion. - excess tension stretching of the cable - crushing of the dielectric General Use - Fatigue due to strain and repetitive stress Page 34 GLI-METRO User’s Guide

Appendix B Examples of Troubleshooting Procedures IF the FAULT light is ON and IF the FAULT light is ON and “FLT OTSC” is displayed “FLT LT4S” is displayed THEN THEN Replace the coax cable Ensure the receive antenna has a clear view of the sky, restart system and wait 4 minutes. IF the FAULT light stops AND “FLT OTSC” is no longer displayed, THEN the problem has been IF receive antenna has clear view of sky, check satellite resolved. signal using a hand-held GPS receiver outside of building/structure. But, IF the FAULT light remains ON and “FLT OTSC” remains displayed, contact GPS Source. IF hand-held GPS receiver is able to acquire 4 or more Technical Support. satellites, THEN replace the receive antenna, or cable or both and restart system. IF the hand-held GPS receiver is NOT able to acquire IF the FAULT light is ON and 4 or more satellites, there is an issue with interference or “FLT LG” is displayed view of the constellation from the area. THEN IF hand-held GPS receiver is able to acquire 4 or more satellites and Receive Antenna and cable have been The Receive Antenna has too little gain. Check the replaced and FLT LT4S still displayed, Contact GPS installation and installation requirements. Consider Source Technical Support. the line of sight on the roof. Also, consider the type and quality of cable. Is it appropriate and is it working correctly. If installation is not correct, make proper adjustments and restart the GLI-METRO. THEN IF the installation is correct or Receive Antenna and cable meets requirements, replace the Receive Antenna and/or the cable (or both) and restart the GLI-METRO. IF the FAULT light stops AND “FLT LG” is no longer displayed, THEN the problem has been resolved. But, IF the FAULT light remains ON and “FLT OTSC” remains displayed, contact GPS Source. Technical Support. GLI-METRO User’s Guide Page 35

Appendix A GPS SMART CONTROLLER FAULT CODES This section describes fault codes and possible causes. CODE POSSIBLE CAUSE SOLUTION FLT ENOS No satellites with adequate signal Receive antenna no longer has a clear view of received during the en route operation the sky OR there is interference FLT GRX GPS Receiver Failure GPS Receiver inside GLI-METRO unit has malfunctioned FLT HG High Gain detected at the input Receive antenna hooked up directly to the GLI-METRO without the 100’ coaxial cable OR Malfunctioning Receive antenna FLT INOC Input Open Circuit detected Receive antenna or cable not connected to the GLI-METRO OR Cable/antenna has malfunctioned FLT OTOC Output Open Circuit detected Passive antenna or cable not connected to the GLI-METRO OR Cable/antenna has malfunctioned FLT INSC Input short circuit detected Receive cable is pinched/bent/broken OR Antenna has malfunctioned FLT OTSC Output short circuit detected Output cable is pinched/bent/broken OR Antenna has malfunctioned FLT LG Low Gain detected at the input Receive antenna/cable is incorrect (a passive transmit antenna may have been accidently used in place of an active receive antenna) FLT LT4S Less than 4 satellites with adequate Receive antenna does not have a clear view of signal received after completion of the sky OR there is interference initialization/acquisition Page 36 GLI-METRO User’s Guide

Appendix A CODE POSSIBLE CAUSE SOLUTION FLT OC* Oscillation Condition detected Transmit and receive antennas are pointed in each other’s direction OR Power level is set to too high FLT PNOS No satellite with adequate signal Transmit and receive antennas are pointed in received within 4 minutes from power on each other’s direction OR Power level is set to too high FLT RFL1 Failure in the L1 RF path Power level is too high FLT RFL2 Failure in the L2 RF path L2 offset is too low OR Power level is too high RR LRU Non-recoverable system error detected – Internal system malfunction e.g. memory Repair/Replace GPS Smart Controller *There are two different states where the Metro reports an OC fault. The first is during power on state before the GPS receiver has acquired satellites and it detects a noise level above a high threshold. The second is after satellites are tracking i.e. operational state and it sees noise above a high threshold and the receiver reports degraded SNR. GLI-METRO User’s Guide Page 37

Glossary of Terms Glossary of Terms Accuracy: How close a fix comes to the actual position. Acquisition: The ability to find and lock on to satellite signals for ranging. Active Antenna: An antenna with an amplifier or an amplified antenna – What defines an “active” GPS antenna is the inclusion of a Low Noise Amplifier (LNA). The LNA is necessary to make up for the signal loss that is inherent in all antenna cables. Active antennas require power from the GPS receiver to power the LNA. This power is obtained through the receiver’s external antenna jack. Because active antennas run off of the GPS receiver’s power, this puts extra drain on the receiver’s batteries. Most receivers detect the presence of an active antenna by the load (current drain) and automatically switch off the internal antenna providing the load is above a certain point. Amplifier (GPS): The GPS signal is inherently weak. An amplifier will increase the power of a GPS signal, so that it can move through longer cable lengths that are used between the antenna and the GPS receiver. Antenna (GPS): A GPS antenna is a device that helps boost the reception signal to a GPS unit, whether it is a standalone unit or an embedded unit. Often a GPS antenna is used in a situation where the GPS unit itself is somehow removed from a line of sight to the sky, as in a building, to help the GPS “see” the sky without having to be moved. Antenna Monitor: For an active GPS active antenna ,performance monitoring is accomplished by monitoring the amount of current the antenna preamplifier consumes, as most problems manifest by either a marked increase or decrease in antenna preamplifier current draw, i.e. too much current indicates a short and too little indicates an open circuit. For a passive antenna this is accomplished in the same fashion but the passive antenna will have a resistor network that draws current instead of a preamplifier Attenuator: A component used to make the GPS signal smaller by a predetermined amount, which is measured in decibels. They can be of two categories: fixed and variable. Bandwidth: The range of frequencies in a signal. BIT: Acronym for Built-In-Test. It is a design that permits a device to test itself Bluetooth: A standard of radio technology that makes it possible to transmit signals over short distances between telephones, computers and other devices. BNC: A type of GPS antenna connection Coax Cable: An electrical cable with an inner conductor surrounded by a flexible, tubular insulating layer, surrounded by a tubular conducting shield. dBm: An abbreviation for the power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW). dB-Hz: Unit of measure for carrier-to-noise density ratio, C/N0. It is a measure of the power density in 1 Hz bandwidth. Decibel: A mathematical conversion utilizing logarithms of a ratio, which is used as a unit of measure for RF signals. It is primarily used as a measure of the (power) gain and (insertion) loss of RF components. DC Feedthrough: A design allowing the DC present on the GPS receiver to be fed to the active antenna. ERP: Acronym for Effective Radiated Power. It is a standardized theoretical measurement of GPS energy and is determined by subtracting system losses and adding system gains. FAULT LED: Indicates the status of the automated Built In Test (BIT) functionality of the GLI-METRO. If FAULT is illuminated, there exists some anomaly within the GLI-METRO which will be shown on the display. Filters: A passive GPS component which passes or rejects a signal solely on the basis of its frequency. There are four main categories of filters: low pass, high pass, bandpass and band reject. Firmware: Lies between software and hardware. Firmware is programming code, but it is stored on a chip or other hardware within the GPS device, and it functions only within the context of the chip/hardware in which it resides. Page 38 GLI-METRO User’s Guide

Glossary of Terms Fix: Defining position, where two lines such as latitude and longitude cross, as determined by one or more navigation aids or techniques. Frequency: The number of waves passing a specific point within a unit period of time, expressed in Hertz (cycles per second). Frequency band: A particular range of frequencies. Frequency Modulation: A method of encoding information about a carrier signal by altering the frequency while amplitude remains constant. Gain: The increase in size of the output signal of an amplifier with respect to the input signal. It is measured in decibels. Gimbal Mount: A gimbal mount is defined as a mount whose axes of rotation are orthogonal and fixed in space. (GPS Source often refers to a gimbal mount as a “Panavise”). GPS: A system for providing precise location which is based on data transmitted from a constellation of 24 satellites - (Global Positioning System) - A system of 24 satellites used to locate any point on the earth by triangulation and distance measuring. GPS Splitter (Power Divider): A passive device which equally divides a GPS signal into two or more signals. GPS Smart Controller: Also known as the GLI-METRO. It receives the GPS L1 (L1/L2 optional) from an active antenna. A power control function measures the output power of the GPS signal from the device and controls the gain. It may be combined with GPS splitters and retransmission antennas to cover a large area. High Gain Amplifier: A high gain GPS amplifier allows for long cables lengths (up to 350 meters) to be used. Insertion Loss: The loss a signal experiences as it travels through a passive component (for example, signal traveling through cabling will experience an insertion loss) Isolation: No unwanted signals are transmitted between ports. It is a measure of the insertion loss in the “open” path of an RF switch, or between any two ports in a passive RF component. Like insertion loss, it is measured in decibels. Interference: Any distortion of the transmitted signal that impedes the reception of the signal at the receiver (same as noise). L-band: The group of radio frequencies extending from 390 MHz to 1550 MHz. The GPS carrier frequencies (1227.6 MHz and 1575.42 MHz) are in the L-band. L1 signal: The primary L-band signal transmitted by each GPS satellite at 1572.42 MHz. L2 signal: The second L-band signal is centered at 1227.60. Lightning Protection: A system designed to protect a structure from damage due to lightning strikes by intercepting such strikes and safely passing their extremely high voltage currents to “ground”. Most lightning protection systems include a network of lightning rods, metal conductors, and ground electrodes designed to provide a low resistance path to ground for potential strikes. Low Noise Amplifier (LNA): A powered amplifier used to amplify the GPS signals (for example, captured by an antenna). It is usually located very close to the detection device (antenna) to reduce losses in the cable. MCX: A type of GPS antenna connection. Multipath Error: Errors caused by the interference of a signal that has reached the receiver antenna by two or more different paths. This is usually caused by one path being bounced or reflected. N: A type of GPS antenna connection Noise: Any unwanted changes to an RF signal. With GPS, it can be any unwanted disturbances, superimposed on a signal, that tend to obscure a signal’s usefulness. or information content. Reverse Isolation: Reverse isolation of an amplifier means no unwanted signals that may be on the GPS device are transmitted back to the GPS antenna. GLI-METRO User’s Guide Page 39

Glossary of Terms Oscillation: To move in a repeated back and forth motion. Passive Antenna: An antenna that does not include an LNA and therefore does not require power. Also known as a transmitting antenna. Power Level: See ERP (Effective Radiated Power) Receiver (GPS): A piece of equipment that is used by the civilians and the military to pick up satellite signals that contain data in order to locate position. Reradiating: When the GPS signal is brought into a structure via an active antenna/coax cable and transmitted inside through a passive antenna. RS232: The most known serial port used in transmitting the data in communication and interface. Even though serial port is harder to program than the parallel port, this is the most effective method in which the data transmission requires less wires that yields to the less cost. The RS232 is the communication line which enables the data transmission by only using three wire links. The three links provides ‘transmit’, ‘receive’ and common ground SMA: A type of GPS antenna connection SNR (signal to noise ratio) Signal to Noise Ratio: A measure of the information content of the signal relative to the signal’s noise. A higher number is desirable. TNC: A type of GPS antenna connection Transmitter: One of the 2 main building blocks in a wireless system which is responsible for taking the signal from the modulator, increasing its frequency and power, then radiating it out the antenna. TTFF: -Time To First Fix - The time it takes for a GPS receiver to lock onto the satellite signals and determine the initial position User interface: The way a receiver conveys information to the person using it. The controls and displays of a device. Variable Gain Amplifier: An amplifier with an external control which is used to vary its gain. XMIT: Acronym for “Transmit” or “Transmitter” Page 40 GLI-METRO User’s Guide



Document Created: 2011-01-24 16:50:28
Document Modified: 2011-01-24 16:50:28
© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC