6 F 2 S 0 7 3 8 INSTRUCTION MANUAL GPS RECEIVER UNIT HHGP1 © TOSHIBA Corporation 2001 All Rights Reserved. ( Ver. 1.
6 F 2 S 0 7 3 8 Safety Precautions Before using this product, please read this chapter carefully. This chapter describes the safety precautions recommended when using the GPS receiver unit type HHGP1. Before installing and using the equipment, this chapter must be thoroughly read and understood. Explanation of symbols used Signal words such as DANGER, WARNING, and two kinds of CAUTION, will be followed by important safety information that must be carefully reviewed.
6 F 2 S 0 7 3 8 DANGER • Installing arrester Install a surge arrester between the antenna and the GPS receiver and ground it in accordance with the guidelines in this manual. Otherwise, it may cause electric shocks, injury or malfunction. WARNING • Exposed terminals Do not touch the terminals of this equipment while the power is on, as the high voltage generated is dangerous. • Residual voltage Hazardous voltage can be present in the DC circuit just after switching off the DC power supply.
6 F 2 S 0 7 3 8 Contents Safety Precautions 1 1. Introduction 5 2. Characteristics 5 3. Configuration 6 3.1 3.2 6 7 4. 5. 6. 7. 8. Configuration of GPS Receiver Unit Outline of GPS Receiver Unit and Function Handling 8 4.1 4.2 4.3 8 9 9 Setting the GPS Receiver Unit How to Turn on the Power Checking the 1PPS Signal Operation 10 5.1 5.2 10 11 1PPS Signal Output Time Data Output Installation 12 6.1 6.2 6.3 6.4 6.5 6.
F 2 S 0 7 3 8 Appendix A Outline of GPS Rceiver Unit 21 Appendix B Technical Data 23 Appendix C Specification of Recommended Antenna and Arrester 27 Appendix D Supplement 31 The data given in this manual are subject to change without notice. (Ver. 1.
6 F 2 S 0 7 3 8 1. Introduction The GPS (Global Positioning System) receiver unit is a device that receives the information from satellites and outputs time signals synchronous to UTC (Universal Coordinated Time) to external devices. The GPS receiver unit provides multiple outputs with optical signals for noise immunity. 2.
6 F 2 S 0 7 3 8 3. Configuration 3.1 Configuration of GPS Receiver Unit Figure 3.1.1 shows the configuration of the GPS receiver unit. The GPS receiver unit receives electromagnetic signals from satellites through an antenna and outputs time data to external devices. Through an internal receiver, the unit generates serial time data and 1-second pulses (1PPS signals), based on the received electromagnetic signal. Each 1PPS signal occurs at the instant in time given by its accompanying frame of serial data.
6 F 2 S 0 7 3 8 3.2 Outline of GPS Receiver Unit and Function Figure 3.2.1 shows outline and functions of GPS receiver unit. ④ FRONT VIEW ① ②③ ⑦ ⑥ ⑤ REAR VIEW 48V ⑧ No. Device Indication Functions ① Yellow LED 5V Turns on when the power (5Vdc) is supplied. ② Yellow LED 1PPS OUT Blinks when 1PPS signals are output synchronously with UTC. ③ Red LED ERROR Turns on when the internal crystal oscillator stops. ④ DIP switches DSW Set the GPS receiver unit settings.
6 F 2 S 0 7 3 8 4. Handling 4.1 Setting the GPS Receiver Unit The GPS receiver unit is set in accordance with the requirements of the system by using the DIP switches located on the front panel of the unit. To prevent erroneous operations, the DIP switches are protected with a cover. As shown in Figure 4.1.1, when the cover is rotated after loosening the cover screw with a screwdriver, the switches are exposed thus making it possible to handle them.
6 F 2 S 0 7 3 8 Table 4.1 Setting the Switches Switch No.
6 F 2 S 0 7 3 8 5. Operation 5.1 1PPS Signal Output The GPS receiver unit outputs 1PPS signals with each pulse defining the instant of time described by the preceding frame of serial data. (For the time signal transmission format, refer to Appendix D.) Following power-up, the GPS receiver begins outputting 1PPS signals after the acquisition of the almanac data and the estimation of the receiver location (or the antenna location to be more exact) are completed.
6 F 2 S 0 7 3 8 Number of receivable satellite signals Five receivable satellite signals Four receivable satellite signals 6 5 Two receivable satellite signals 4 3 One receivable satellite signal 2 1 Time 0 1PPS output Stop Power ON (In the case of normal mode) Almanac data reception (12 to 30 minutes) Figure 5.1.1 5.
6 F 2 S 0 7 3 8 6. Installation 6.1 Receipt of GPS Receiver Unit When GPS receiver units are received, carry out the acceptance inspection immediately. In particular, check for damage during transportation, and if any is found, contact the vendor. Always store the GPS receiver units in a clean, dry environment. 6.2 Installing GPS Receiver Unit CAUTION Do not remove flanges from the main unit, as this may cause a failure.
6 F 2 S 0 7 3 8 Don’t locate in shade of obstructing objects (Box, antenna, etc.). Don’t locate in shade of obstructing objects (Box, antenna, etc.) Next, connect the antenna to the arrestor with a coaxial cable. The following antennas are recommended: GPA-014B or GPA-017S manufactured by Furuno Electric Co., Ltd. The specifications for and dimensions of these antennas are described in Appendix C. The antenna should be fixed to a support pole with Debe clamps and U bolts.
6 F 2 S 0 7 3 8 Debe clamp Antenna Connector junction Insulation treatment (Autofusion tape, vinyl tape or water-proof cap) Fix the cable to the support cable by making a circle while making sure the cable is long enough. Coaxial cable Support pole (φ38 to 64) Figure 6.3.2 An Example of Installation, Using GPA-014B for Antenna (A) Antenna Parker clamp Leave the connector slightly loose so that no excessive force is applied. Auxiliary bracket Connector junction.
6 F 2 S 0 7 3 8 6.4 Installing Surge Arrester The GPS antenna must be installed outdoors, so a surge arrestor is required as a measure against induced surges due to lightening. (This is not effective against a direct lightening strike.) The arrestor should be installed at the point where the coaxial cable from the antenna enters the building. A recommended arrestor is CA-23RS made by Daiichi Denpa Kogyo. The specifications for and the appearance diagram of the arrestor are described in Appendix C.
6 F 2 S 0 7 3 8 6.6 Connecting the Power Supply and the Earthing Terminal Connect the 48Vdc power cable and the earth cable to the terminal block with M4 crimped terminals. For safety purposes, make sure that the earth connection is reliable. CAUTION The earthing terminal must be securely earthed. The failure to ground may cause malfunctions, electric shocks or injury.
6 F 2 S 0 7 3 8 7. Preparation for Installation The following issues should be considered prior to commencing installation of the system. 7.1 Selecting an Antenna and Cables The choice of antenna and cable types should be made based on the distance from the antenna installation site to the GPS receiver unit installation site, and also on the cabling conditions. Coaxial cables of characteristic impedance 50 ohms are required. The signal frequency is 1.57GHz.
6 F 2 S 0 7 3 8 7.3 Selecting an Antenna Installation Location CAUTION If antenna is not located in the method described below, it may not be possible to receive the GPS signal correctly. Obstructing object allowed in this area. is not 15°(maximum) Antenna Support pole (fix to fence etc.) Roof of building Neighbouring building The antenna is installed outdoors to receive satellite transmissions.
6 F 2 S 0 7 3 8 8. Maintenance 8.1 Regular Maintenance Surge arrestors are degraded by lightening induced voltages, resulting in changes to their discharge breakdown voltage. They require periodic checks and should be replaced if necessary. They can be checked by removing the internal components from the arrestor cabinet. The glass pipe part should be inspected and if it has turned black then replacement is required. CAUTION The surge arrestor must be periodically maintained to prevent malfunction. 8.
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6 F 2 S 0 7 3 8 Appendix A Outline of GPS Receiver Unit 21
6 F 2 S 0 7 3 8 Outline 140.0 2.3 260.0 12.5 7.0 70.0 45.0 12.5 4-R3.5 7.0 290.0 308.0 Panel cutout 4-φ7 hole 45 45 15 15 266 22 72 162.
6 F 2 S 0 7 3 8 Appendix B Technical Data 23
6 F 2 S 0 7 3 8 TECHNICAL DATA Ratings DC power supply: 48Vdc-10W (Operative range: 38.4 to 57.6Vdc) AC ripple on dc supply IEC 60255-11: maximum 12% DC supply interruption IEC 60255-11: less than 10ms at 48Vdc Permitted duration of dc supply voltage interruption to maintain normal operation Mechanical design Weight: 2.7kg Installation: Flush mounting Receiving function Number of receiving satellites: Eight satellites received in parallel Receive signals: L1 C/A code Receive frequency: 1575.
6 F 2 S 0 7 3 8 Environmental Performance Claims for GPS Receiver Test Standards Details Atmospheric Environment Temperature IEC60068-2-1/2 Operating range: -10°C to +55°C. Storage / Transit: -25°C to +70°C. Humidity IEC60068-2-3 56 days at 40°C and 93% relative humidity.
6 F 2 S 0 7 3 8 Surge Immunity IEC61000-4-5, EN61000-4-5 1.2/50µs surge applied to PSU terminals in common/differential modes: 2kV/1kV (peak) Conducted and Radiated Emissions EN55022 Class A Conducted emissions: 0.15 to 0.50MHz: <79dB (peak) or <66dB (mean) 0.
6 F 2 S 0 7 3 8 Appendix C Specification of Recommended Antenna and Arrester 27
6 F 2 S 0 7 3 8 Recommended Antenna Type GPA-014B GPA-017S FURUNO Electric Co.,Ltd. FURUNO Electric Co.,Ltd. Operating connector BNC-J TNC-J Applicable connector BNC-P TNC-P 29 to 35dB 22 to 33dB No more than 2.1dB No more than 1.6dB 4 to 13V 4.0 to 5.5V 25 to 30mA No more than 25mA Operating temperature - 30 to + 80℃ - 25 to + 65℃ Storage temperature - 40 to + 85℃ - 35 to + 75℃ Weight Approx. 300g Approx.
6 F 2 S 0 7 3 8 Recommended Arrester Type CA-23RS Manufacturer DAI-ICHI DENPA KOGYO CO., LTD. Frequency range DC – 2500MHz VSWR No more than 1.1 Loss No more than 0.
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6 F 2 S 0 7 3 8 Appendix D Supplement 31
6 F 2 S 0 7 3 8 1. Time Signal Transmission Format The time signal format is shown below, consisting of 4,800bps serial data indicating the time, and 1PPS timing signal indicating the instant of time corresponding to the serial data. 1PPS timing signal Serial data 4800bps Signal for next second Signal code format: ASCII codes based on NMEA-0183 data Output data: GPtps data (time and 1PPS flag) GPtst data (self-test result) 2.
6 F 2 S 0 7 3 8 pulse. If the necessary number of satellites are available then the unit carries out error detection and removal of erroneous signals. In the event of two or more satellites in error, the operation is not assured. In high-reliability mode, the receiver will only output the 1PPS signal when no TRAIM alarm occurs. If any satellite is in error then it must be excluded, and so two or more satellites are required for the purpose of outputting 1PPS.
6 F 2 S 0 7 3 8 Version-up Records Version No. Date Revised Section Contents 0.0 May. 23, 2001 -- First issue. 1.0 Jun. 22, 2001 3.2 5.1 6.6 7.1 Appendices Modified Figure 3.2.1. Modified Figure 5.1.1 Modified Figure 6.6.1. Modified descriptions in Section 7.1. Modified Appendices B, C, I and K. 1.1 Jul. 19, 2001 -4.1 Appendix D Corrected Type of GPS unit. (HHGP3 →HHGP1) Modified descriptions in Section 4.1. Modified descriptions 0f “2. Date rollover” in Appendix D. 1.2 Jul. 25, 2001 6.