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NorthStar 8700 Technical Reference Manual

Gps position sensor, beacon sensors, gps/dgps position sensors
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Northstar Technologies
8700 GPS Position Sensor
8800 Series Beacon Sensors
8900 Series GPS/DGPS Position Sensors
Technical Reference Manual
Revision H
May 1, 1997
Part No. GM8900
© 1997 Northstar Technologies
a division of CMC Electronics, Inc.
Northstar Technologies
30 Sudbury Road
Acton, Massachusetts 01720
Sales: 508/897-6600
Service: 508/897-7251
Fax: 508/897-7241

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  • Page 1 Northstar Technologies 8700 GPS Position Sensor 8800 Series Beacon Sensors 8900 Series GPS/DGPS Position Sensors Technical Reference Manual Revision H May 1, 1997 Part No. GM8900 © 1997 Northstar Technologies a division of CMC Electronics, Inc. Northstar Technologies 30 Sudbury Road...

  • Page 3: Revision History

    Revision history Date May 1, 1997 Ordering information To receive additional copies of this publication, order the North- star Sensors Technical Reference Manual (Part No. GM8900). Pages Revision...
  • Page 4 Northstar 8700, 8800 series, and 8900 series sensors Northstar Technologies, a division of CMC Electronics, Inc., war- rants its family of 8700, 8800 series, and 8900 series sensors to be free from defects in materials and workmanship for a period of two (2) years.

  • Page 5: Table Of Contents

    2.1.1 Northstar 8700........
  • Page 6 Section 7 - Antennas ......23 7.1 Overview ......... . . 23 7.2 GPS antenna (AN145) .
  • Page 7 9.1.1 Wiring power control ....... 37 9.1.2 8700 connector pinouts ......37 9.1.3 8800 connector pinouts .
  • Page 8 Tables Table 1 — 8700 parts ....... 7 Table 2 —...
  • Page 9 - Northstar AN195 H-Field antenna ... . 26 Figure 8 - Northstar 8410 ACU ..... . 27 Figure 9...

  • Page 11: Section 1 - About This Manual

    NMEA protocol, beacon binary protocol, RS-422 and RS-232 inter- faces, and the 8X00 ALLSTAR Engine Monitor Program is all contained within this manual. In fact, if you own this Northstar Sensors Technical Reference Manual, you should have received a copy of the Northstar 8X00 ALLSTAR Engine Monitor Program.

  • Page 12: Glossary And Acronyms

    (not just a company name) so we can send you any future product information. In case of an operating problem with a Northstar sensor, you may contact 1.1.6 Service and your dealer or return the sensor to the Northstar factory for diagnosis repair and repair.

  • Page 13: Section 2 - Introduction

    Maritime Services (RTCM) SC-104 data. See Section 4, “GPS Receivers,” for complete information about the Northstar 8700. The Northstar 8800 series (comprised of either the 8800 or the 8801, an 2.1.2 Northstar 8800 bundled for agricultural applications) is a two-channel, auto-tuning,...

  • Page 14: Sensor Dimensions

    Width = 4.6 inches Depth = 8.9 inches Weight < 2 pounds (All dimensions in inches) FIGURE 1 - 8700/8800 series/8900 series dimensions CAUTION! Before you apply power to the system, double-check all wiring. A small, but significant number of units sustain damage because of incorrectly wired connec- tions.

  • Page 15: Interfacing

    The status indicator light in the 8800 and 8900 sensors refers to beacon status, not GPS status. You can interface Northstar position sensors to a wide variety of external 2.1.6 Interfacing devices, such as navigators, computers, yield monitors, and so on. These external devices, or host systems, receive and process the data from the sensor, and in some applications, may control the sensor.
  • Page 16 Section 2 - Introduction PAGE 6 05/01/97 REV H...

  • Page 17: Section 3 - Packaging

    Figure 1 in Section 2, “Intro- duction,” for case and mounting dimensions. Northstar ships each sensor system with the following parts; check with Northstar if these parts aren’t included with your sensor. 3.2 Northstar 8700 parts Part # 8700–A...

  • Page 18: Table 3: 8801 Parts

    PAGE 8 DGPS antenna connecting cable (RG-58U coaxial, 25 feet). Standard with 8410 Optional H-field DGPS-only antenna with 20 feet of RG-59U coaxial cable Northstar 8800 and 8801 Beacon Receivers Installa- tion Manual Table 3: 8801 parts Description 8800 beacon sensor...

  • Page 19: Table 5: 8901 Parts

    Description 8901 integrated GPS/DGPS position sensor with internal splitter Combination antenna with 20 feet of RG-59U coaxial cable Northstar 8901/8901AL Ag DGPS Sensors Field Instal- lation Manual Optional interfacing cable for agricultural applica- tions Optional interfacing cable for AgLeader applications...
  • Page 20 Section 3 - Packaging PAGE 10 05/01/97 REV H...

  • Page 21: Section 4 - Gps Receivers

    Electrical requirements The 8700’s power supply is protected against reverse-polarity power inputs, and features a remote turn-on ability. The 8700 turns on when- ever power is applied to pin 25, ground to pin 13, and remote-on pin 12 is connected to a source of +5 to +40 VDC.

  • Page 22: Figure 2 - 8700 Allstar Engine Operating Modes

    • Reacquisition time • • Sensitivity • Coarse acquisition • Environment • • The 8700 automatically switches between six operating modes: 4.1.3 Operating modes • • • • • • The six modes are described in detail below. PAGE 12 60 seconds typical Time-To-First-Fix (TTFF) with current almanac <...
  • Page 23 Initialization When either power is applied or the self-test mode is complete, the 8700 enters initialization mode. While in this mode, the 8700 retrieves satel- lite-orbit data stored in its EEPROM memory.
  • Page 24 Fault mode The 8700 enters fault mode from any mode—except initialization—when and if the 8700 determines that one or more critical system faults are affecting its outputs. Fault mode supersedes all others, and remains active until the next power-down/power-up cycle.

  • Page 25: Section 5 - Beacon Receivers

    The 8800 and 8801 sensors are functionally identical; the only difference 5.1.1 About the is their configuration. The 8800 can be used with either the Northstar Northstar 8801 8410 ACU or the Northstar AN195 H-field antenna, and is intended pri- marily for marine applications.

  • Page 26: Features

    Manual (Northstar Part Number GM635); these receivers include the Northstar 806, 806X, and Europa GPS navigators; and the Northstar 8000, 8100, 8300, 8700, and 9300 DGPS sensors used with the Northstar 800 and 9000 series navigators. For other receivers, use the Northstar dia- grams as a guide, and consult the interfacing diagrams supplied with your receiver.

  • Page 27: Operating Modes

    • Data processing • • • Data ports • • • Environment • • Electrical requirements The 8800’s power supply is protected against reverse-polarity power inputs, and features a remote turn-on ability. The 8800 turns on when- ever power is applied to pin 25, ground to pin 13, and remote turn-on pin 12 is connected to a source of 5 to 40 VDC.
  • Page 28 Section 5 - Beacon receivers Manual mode At any time, the host device can override automatic station selection by issuing tuning commands on the serial interface. In manual mode, the 8800 will output DGPS corrections from the selected station, restoring automatic mode either the next time the unit is powered on or when the controlling device specifies a station frequency of zero.

  • Page 29: Section 6 - Gps/Beacon Combination Receivers

    12-channel GPS with fully automatic, dual-channel beacon performance for the ulti- mate in position accuracy. The 8900 sensor combines the Northstar 8700 GPS sensor and the Northstar 8800 differential sensor to create a product...

  • Page 30: Technical Specifications

    Section 6 - GPS/beacon combination receivers • • • 6.1.3 Technical Power requirements specifications • • • • Electrical requirements The 8900’s power supply is protected against reverse-polarity power inputs, and features a remote turn-on ability. The 8900 turns on when- ever power is applied to pin 25, ground to pin 13, and remote turn-on pin 12 is connected to a source of 5 to 40 VDC.
  • Page 31 Environment • • 05/01/97 REV H Operating temperature: Zero to 55 C Relative humidity: 95 percent (non-condensing) Section 6 - GPS/beacon combination receivers PAGE 21...
  • Page 32 Section 6 - GPS/beacon combination receivers PAGE 22 05/01/97 REV H...

  • Page 33: Section 7 - Antennas

    Northstar AN200 GPS/DGPS antenna. See Section 3, “Packaging,” to deter- mine which antennas are appropriate for your particular sensor. 7.2 GPS antenna (AN145) The Northstar AN145 is a passive GPS antenna that’s shipped with 25 feet 7.2.1 Description of RG-59U coaxial cable.

  • Page 34: Gps Antenna (An150)

    7.3 GPS antenna (AN150) The Northstar AN150 is similar to the AN145; however, it contains an 7.3.1 Description active preamplifier that can drive up to 100 feet of RG-59U coaxial cable.

  • Page 35: Dimensions

    The AN190 is shipped with 50 feet of coaxial cable and an external splitter. The AN200 is an AN190 with 20 feet of RG-59U coaxial cable. The AN200 is shipped as standard equipment with the Northstar 8901 sensor). 7.4.2 Dimensions 12 dB 7.4.3 Gain...

  • Page 36: Cable Length

    7.6 Whip antenna (8410 ACU) The Northstar 8410 Antenna Coupling Unit (ACU) consists of two poly- 7.6.1 Description carbonate pieces, a base and an upper unit, which is threaded to accept a standard four-foot fiberglass whip antenna.

  • Page 37: Figure 8 - Northstar 8410 Acu

    In normal installations, cable length up to 300 feet is acceptable. To accurately receive and effectively use differential corrections under a 7.6.4 Mounting wide variety of weather conditions, proper installation of your Northstar location 8410 DGPS antenna is of utmost importance. You must mount the whip antenna as high as conveniently possible—but not at the highest...
  • Page 38 Section 7 - Antennas charges in the atmosphere. If the beacon receiver antenna is the highest object, these discharges can totally override the beacon signals and cause poor operation in bad weather.) The optimal antenna location is high and clear for fair-weather operation, but below the top of a metal mast or other antenna for best foul-weather operation.

  • Page 39: Section 8 - Input/Output Configurations

    Section 8 - Input/output configurations The Northstar 8700, 8800 series, and 8900 series sensors contain either a GPS sensor, a BDM receiver, or both. Each sensor has two full-duplex serial ports that you can interconnect with each other and/or external devices in various ways as required for your applications.

  • Page 40: Configuration Details

    The eight standard configurations are shown in Table 7 below, which lists one to three standard configura- tions recommended for each sensor type (these configurations relate to Northstar PAL Version 2.6. If problems occur, contact Northstar customer service for assistance): Sensor...

  • Page 41: Table 8 - Configuration 7

    RS-232 input 3 Configuration 5 (for pinouts, see Table 15 on page 38) is used with the Northstar 8800, which only contains a BDM. Inputs and outputs from both BDM ports are available in RS-232 and RS-422 signal levels. 05/01/97 REV H...

  • Page 42: Table 11 - Configuration 4

    RS-422 input 1 Configuration 3 (for pinouts, see Table 14 on page 37) is used with the Northstar 8700, which contains only a GPS sensor. Inputs and outputs from both GPS ports are available in RS-232 and RS-422. Pin #...

  • Page 43: Connector Pin Assignments

    Table 13 below contains the hardware port numbers and signal levels available on all the sensor’s connector pins. Specific signal assignments for standard 8700, 8800, and 8900 configurations are found in Section 9, “Connector Pinouts.” 8.6 Input and output signals The SC-104 port supplies differential corrections.

  • Page 44: Bdm Control Input

    Section 8 - Input/output configurations The BDM control input accepts tuning commands in either NMEA 0183 8.6.2 BDM control format messages or Magnavox MX-50R-compatible binary control com- input mands. For details, see Section 10.1.1, “NMEA 0183 format control mes- sages” on page 43. The port characteristics are listed below. •...

  • Page 45: Gps Primary Output

    The primary input port supports communications via the NMEA-1083 8.6.8 GPS primary V2.0 and CMC Binary protocols. The port characteristics are listed below. output • • • 5 to 40 VDC 8.6.9 Remote POWER ON control 10 to 40 VDC 8.6.10 DC power input 1 Hz timing pulse with 1 Hz duty cycle.
  • Page 46 Section 8 - Input/output configurations PAGE 36 05/01/97 REV H...

  • Page 47: Section 9 - Connector Pinouts

    9.1.1 Wiring power control • • The 8700’s configuration pins should be wired as shown in Table 14, with 9.1.2 8700 pins 11 and 23 left open and pin 24 grounded. With this configuration, connector pinouts signals appear on the connector pins as described below in Table 14...

  • Page 48: Connector Pinouts

    Section 9 - Connector pinouts Pin # Description Remote POWER ON control (-) DC power input (ground) Input signals may be connected to any appropriately labeled input pin; output signals may be taken from any appropriately labeled output pin. Choose either RS-422 or RS-232 pins as required by the host device. Both RS-422 and RS-232 outputs may be used simultaneously;...

  • Page 49: Table 16 - 8900 Standard Connector Pinouts/Config. 7

    Pin # Description Ground BDM RTCM SC-104 output 3 (RS-232) BDM control input 3 (RS-232) Configuration pin B (to GROUND) Remote POWER ON control (-) DC power input (Ground) Input signals may be connected to any appropriately labeled input pin, and output signals may be taken from any appropriately labeled output pin.

  • Page 50: Alternate Connector Pinouts For The 8900

    Section 9 - Connector pinouts Pin # Description GPS primary input 1 (RS-232) Ground BDM monitor output 3 (RS-232) BDM monitor input 3 (RS-232) Configuration pin B (leave OPEN) Remote POWER ON control (-) DC power input (Ground An alternate configuration for the 8900 lets the BDM and GPS receivers 9.1.5 Alternate operate independently, whereby the GPS receiver accepts differential cor- connector pinouts...

  • Page 51: Table 18 - 8900 Alternate Connector Pinouts/Config. 4

    Choose either RS-422 or RS-232 pins as required by the host device. You may use other pins if complex installations require additional inputs or outputs. • • • • • • Pin # Description BDM control input 2A (RS-422) Ground BDM monitor input 1B (RS-422) BDM SC-104 output 2B (RS-422) BDM monitor output 1A (RS-422)
  • Page 52 Section 9 - Connector pinouts PAGE 42 05/01/97 REV H...

  • Page 53: Section 10 - Nmea Protocols

    This section supplies information for special applications and for when you require manual control of the Northstar DGPS beacon receiver. Messages to control operation of the Northstar DGPS beacon receivers are accepted on either the monitor or control input ports, or both. Two con- trol protocols are implemented: NMEA 0183 and binary;...

  • Page 54: Table 19: Command Parameters

    Section 10 - NMEA protocols bitrate is unknown, in which case it’s determined automatically.) If a cor- rect broadcast bitrate is specified, the beacon receiver uses that additional information to improve acquisition and tracking of weak and noisy sig- nals. Special beacon receiver DGPS receiver functions are requested by extended NMEA 0183 format commands, which include a command parameter.

  • Page 55: Gps Serial Protocol

    $PSLIB,0,(CR)(LF) $PSLIB,,,R(CR)(LF) $PSLIB,284.5,0(CR)(LF) 10.2 GPS serial protocol This section describes the serial protocol used by the GPS sensor to com- municate with the host device. The serial communication runs under the following setup: • • Data information passed on the serial line is divided in one or more NMEA-approved or proprietary sentences having the following structure.
  • Page 56 Section 10 - NMEA protocols Field type Symbol Latitude llll.ll Longitude yyyyy.yy Time hhmmss.ss Defined field — Numeric value fields Variable numbers Fixed HEX hh_____ field Information fields Variable text Fixed alpha aa_____ field Fixed num- xx_____ ber field Fixed text cc_____ field NOTES:...

  • Page 57: Table 23: Primary Port Input Sentences

    #110 of Appendix E in the ALLSTAR OEM CMT-1200 Specifications Rev. H. (To order this document, call the Northstar sales department.) On power-up, with non-volatile memory (NVM), the primary port stays in the same mode; without NVM, the default mode is monitor mode (CMC binary).

  • Page 58: Table 25: Initialization Command

    Section 10 - NMEA protocols Example A: Configure the primary port to monitor mode at 19200 baud rate. Initialization data command ($PMCAG,001) This message initializes the GPS receiver with reference Universal Coordi- nated Time (UTC) date and time, and user position. Data field $PMCAG,001,xx,xx,xxxx,hhmmss.ss,±xx,xx,±llll.ll,a,yyyyy.yy,a,±x.x,c*hh<C R><LF>...

  • Page 59: Table 27: Output-Configuration Message Identifiers

    Initiate self-test command ($PMCAG, 003) This message requests a complete self-test of the GPS sensor. Test results will be automatically output (output message 902 ) on the primary out- put port at completion of the self-test sequence: $PMCAG,003*hh<CR><LF> Example C: Request a complete self-test of the GPS Request output message command ($PMCAG, 004) This message asks the unit to output any NMEA data message one time only:...

  • Page 60: Table 28: Set Output Configuration Command

    Section 10 - NMEA protocols Data field $PMCAG,005,x.x,ccc,xxx,...,ccc,xxxx*hh<CR><LF> ccc,xxx (first) ccc,xxx (nth) Example E: $PMCAG,005,4.8,GGA,010,RMC,001,VTG,001,ZDA,010*48<CR><LF Here, output messages GGA and ZDA are transmitted every 10 seconds; RMC and VTG are transmitted every second at 4800 baud. Example F: Here, GGL is transmitted every second at 4800 baud; and GLL is saved in NVM.

  • Page 61: Table 31: Character/Element

    UTC parameters Position Time DGPS configuration Default NMEA message list RS-232 configuration (This com- mand forces the 8700 to go into binary mode at 9600 baud at next power-up.) $PMCAG,007,15*6B<CR><LF> Table 32: Radio-beacon command message Contents Radio-beacon frequency, 285.5 to 325.0 kHz...

  • Page 62: Table 33: Primary-Port Output Sentences

    Section 10 - NMEA protocols Data field Example I: Here, MSS and 903 are transmitted every four seconds; set the frequency to 288.0 in automatic mode, and bitrate to 100 in automatic mode. This section defines the valid output sentences available on the primary 10.2.2 Output port.

  • Page 63: Table 34: Navigation Status Sentence

    Example K: Self-test results ($PMCAG, 902) This message provides results of the 8700 GPS sensor self-test. The mes- sage is automatically output in response to an initiated BIT self-test request (see input message identifier 003 ). This message also can be requested through input message identifier 004 to retrieve the current status of the sensor without initiating a self-test sequence.

  • Page 64: Table 35: Self-Test Sentence

    Section 10 - NMEA protocols Data field $PMCAG,902,xxxxxx,xxx,a,aaaa,xx,xx*hh<CR><LF> xxxxxx aaaa Example L: -and- Radio-beacon proprietary information ($PMCAG, 903) This message is automatically output in response to an MSK request (see input message identifier MSK). Data field $PMCAG,903,x.x,aa,x.x,x.x,x.x,x.x,x.x*hh<CR><LF> Example M: PAGE 54 Table 35: Self-test sentence Contents Software part number (root number)

  • Page 65: Table 37: Gps-Fix Data Sentence

    GPS-fix data ($GPGGA) This message provides time, position, and fix-related data. Data field $GPGGA,hhmmss.ss,llll.llll,a,yyyyy.yyyy,a,x,xx,xx.x, ±xxxxx.x,M,xxxx,M,xxxx,xxxx*hh<CR><LF> hhmmss.ss llll.llll yyyy.yyyy xx.x ±xxxxx.x xxxx xxxx xxxx Example N: $GPGGA,012338.61,5619.2837,N,17235.8964,E,1,05,02.3,-00 05/01/97 REV H Table 37: GPS-fix data sentence Contents UTC of position Latitude (with respect to WGS-84). Two digits of degrees and minutes;...

  • Page 66: Table 38: Example N Sentence

    Section 10 - NMEA protocols Data field $GPGGA,012338.61,5619.2837,N,17235.8964,E,1,05,02.3, -00034.2,M,,M,,*66<CR><LF> Latitude Longitude Quality Satellites used HDOP Altitude Geographic position—latitude/longitude ($GPGLL) This message provides latitude and longitude of present position, time of position, and status. Data field $GPGLL,llll.llll,a,yyyyy.yyyy,a,hhmmss.ss,A*hh<CR><L F> llll.llll yyyyy.yyy hhmmss.ss GPS DOP and active satellites ($GPGSA) This message provides operating mode, satellites used for navigation, and DOP values from the GPS sensor.

  • Page 67: Table 40: Gps Dop And Active Satellite Sentence

    Data field $GPGSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx.x, xx.x,xx.x*hh<CR><LF> xx,xx,xx, xx,xx,xx, xx,xx,xx, xx,xx,xx xx.x xx.x xx.x Example O: $GPGSA,A,3,14,22,03,09,08,29,17,,,,,,2.7,2.2,1.6*3A<CR><LF> In this example, mode is Automatic/3-D; SVs used are PRNs 14, 22, 03, 09, 08, 29, and 17; PDOP is 2.7; HDOP is 2.2; and VDOP is 1.6. GPS satellites in view ($GPGSV) This message provides number of SVs in view, PRN numbers, elevation, azimuth, and SNR values.

  • Page 68: Table 42: Mss Radio-Beacon Signal Status Sentence

    Section 10 - NMEA protocols Data field xx.x .,xx,xx,x xx,xx.x Example P: $GPGSV,2,1,06,03,12,238,06.0,07,82,008,15.5,11,04,053,,27,43,178,12.3*67<CR> In this example, messages are 2; message number is 1; SV visible is 6; PRN is 03; elevation is 12 azimuth is 238 SNR is 6 dB; PRN is 07; elevation is 82 azimuth is 8 SNR is 15.5 dB;...

  • Page 69: Table 43: Recommended-Minimum-Specific Sentence

    Data field $GPRMC,hhmmss.ss,A,llll.llll,a,yyyyy.yyyy,a,xxx.x,xx x.x,xxxxxx,,*hh<CR><LF> hhmmss.ss llll.llll yyyyy.yyy xxx.x xxx.x xxxxxx Example S: $GPRMC,224512.45,G,2518.3847,S,08339.8367,E,003.8,311.5,080793,,*2E<CR><LF> In this example, UTC is 22:45:12.45; status is Good; latitude is 25 18.3847' South; longitude is 083 39.8367' East; speed is 3.8 knots; head- ing is 311.5 from North; and date is 08/07/93. Track made good and ground speed ($GPVTG) This message provides actual track made good and speed relative to the ground.

  • Page 70: Table 45: Utc Time, Data, And Local Time-Zone Sentence

    Section 10 - NMEA protocols Data field K*hh Example T: In this example, track is 234.6 from North; speed is 75.3 knots; and speed is 139.5 km/hr. UTC time and date ($GPZDA) This message provides UTC time, date, and local time zone. Data field $GPZDA,hhmmss.ss,xx,xx,xxxx,xx,xx*hh<CR><LF>...

  • Page 71: Section 11 - Beacon Receiver Binary Protocol

    Section 11 - Beacon receiver binary protocol 11.1 Beacon receivers (8800 series and 8900 series) If your differential-ready GPS receiver is compatible with the Magnavox 11.1.1 Binary MX-50R radio-beacon interface protocol, a subset of this command proto- control messages col can be used to control the 8800 DGPS receiver. These binary control messages consist of a function byte followed by parameter bytes.

  • Page 72: Gps Binary Protocol

    NMEA 0183 Version 2.0; however, the sensors are capable of talking in binary protocol (CMC binary). For details on this protocol, see Appendix E, “CMC Binary Protocol,” in the ALLSTAR OEM CMT-1200 Specifications Rev H. To order this document, call the Northstar sales department. PAGE 62 C1 = message identifier...

  • Page 73: Section 12 - 8X00 Engine Monitor Program

    NMEA sentences from the 12-channel CMC ALLSTAR GPS engine and beacon receiver, then displays the sensor’s output data and status. This program runs on most IBM-compatible PCs, and interfaces with the 8700, 8800, and 8900’s data ports, letting you monitor and log a sensor’s out- put.

  • Page 74: Satellite Data

    Section 12 - 8X00 engine monitor program • • 12.1.3 Satellite • • data • • • The main program screen contains a menu for nine of the keyboard func- 12.1.4 Function tion keys. Pressing each of the keys tells the program to perform the fol- key tasks lowing tasks: •...

  • Page 75: About Data Files

    Messages within data files can be read in by the 8X00 program and sent 12.2.3 About data to the ALLSTAR engine. Lines beginning with a comment character “ ; ” files are ignored by the program when the file is read by the receivers. Lines containing a comment character “...
  • Page 76 Section 12 - 8X00 engine monitor program PAGE 66 05/01/97 REV H...

  • Page 77: Section 13 - Glossary

    The data is used to calculate exact satellite positions, continually updated and derived from information relayed to the sensor in each satellite’s data stream. Host The customer system receiving position data from the 8700/8800 series/8900 series. Selective Availability The intentional degrading by the U.S. Department of Defense of satellite...
  • Page 78 Section 13 - Glossary PAGE 68 05/01/97 REV H...

  • Page 79: Section 14 - Abbreviations And Initialisms

    Section 14 - Abbreviations and initialisms Beacon DeModulator (receiver for differential correction signals) Canadian Marconi Company deciBel relative to 1 milliWatt EEPROM Electrically Erasable Programmable Read- Only Memory Frequency-locked loop HDOP Horizontal Dilution of Precision The frequency band used by the GPS sensor Least Significant Bit Medium Frequency band Most Significant Bit...
  • Page 80 Section 14 - Abbreviations and initialisms PAGE 70 05/01/97 REV H...

  • Page 81: Index

    ALLSTAR OEM CMT-1200 Specifications Rev. H ordering Almanac data defined Antennas antenna systems cables DGPS-only dimensions GPS/DGPS combination Applications, for Northstar sensors Beacon receivers binary protocol features manual control of operating modes special applications technical specifications Combination beacon/GPS receivers Configurations...
  • Page 82 Index Conventions, understanding Data/power connector pin assignments standard configurations DGPS Dimensions of Northstar sensors Ephemeris data defined GPS receivers binary protocol features operating modes serial protocol technical specifications GPS/beacon combination receivers features technical specifications Host device defined interfacing wiring power to...
  • Page 83 Northstar 8900 series introducing parts Northstar 8901 applications introducing parts Northstar Sensors Technical Reference Manual contents of using Operating modes GPS receivers Power supplying wiring Programmed Array Logic (PAL) chip 05/01/97 REV H ......... . 29 .
  • Page 84 Index custom configurations standard configurations Radio-beacon coverage Registration card, filling out Search the sky Selective Availability and satellite signals defined Service and repair procedure Sferics Shipping address for returns Status indicator light, functions of the Web address Wiring power to the sensors PAGE 74 .
  • Page 85 Index 05/01/97 REV H PAGE 75...

This manual is also suitable for:

8800 series89018900 series

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