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SBX-3 Reference Manual

85

A

PPENDIX

B - B

EACON

I

NFORMATION

CSI Wireless endeavors to maintain an accurate listing of DGPS
radiobeacons worldwide that is available on the Internet from the CSI
Wireless home page:

www.csi-wireless.com

This listing contains the following information regarding currently
operating beacons and potential new sites:

•

Station name

•

Frequency

•

MSK rate

•

Location

•

Transmitting ID

•

Reference station ID

•

Field Strength

•

Operating notes

This document is viewable within your Internet browser, however, if you
require a faxed copy of this information, contact your CSI Wireless
dealer or CSI Wireless Sales.

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Summary of Contents for SBX-3

Page 1: ...SBX 3 Reference Manual Part Number 875 0031 001 Date May 2001...

Page 2: ...erence Manual ii CSI Wireless INC 1200 58 Avenue S E Calgary Alberta Canada T2H 2C9 Telephone number 1 403 259 3311 Fax number 1 403 259 8866 E mail address info csi wireless com Web Site www csi wire...

Page 3: ...permission from CSI Wireless Inc FCC Notice The SBX 3 Evaluation Module complies with the Part 15 Subpart J Emission Requirement for Class A digital devices for use in commercial business and industr...

Page 4: ...for a particular purpose CSI Wireless hereby disclaims and excludes all other warranties In no event shall CSI Wireless be liable for direct indirect incidental collateral or consequential damages of...

Page 5: ...person s or party s shall render this warranty null and void CSI Wireless does not warrant or guarantee the precision or accuracy of positions obtained when using CSI Wireless products Product accurac...

Page 6: ...SBX 3 Reference Manual vi...

Page 7: ...ons and Warnings xviii 1 Introduction 1 1 1 GPS 1 1 1 1 How it Works 1 1 1 2 GPS Services 2 1 2 Differential GPS 2 1 2 1 How it Works 2 1 2 2 Real Time DGPS 3 1 3 DGPS Format 3 1 4 Radiobeacon DGPS Se...

Page 8: ...Splitter 13 2 SBX 3 Evaluation Module 15 2 1 System Parts List 16 2 2 LED Indicators 17 2 3 SBX 3 Evaluation Module Interface Connections 18 2 4 SBX 3 Evaluation Module Default Settings 19 2 5 Install...

Page 9: ...3 5 2 Dual Serial Port Operation 36 3 5 3 SBX 3 Y Data Cable 36 3 6 SBX 3 Operating Modes 38 3 6 1 Automatic Beacon Search ABS Mode 38 3 6 2 Manual Mode 40 3 7 Factory Default Settings 40 3 8 SBX 3 In...

Page 10: ...cols 54 5 2 Description of NMEA 0183 54 5 3 NMEA Message Elements 55 5 4 Supported NMEA Messages 56 5 5 Response Message 57 5 6 NMEA 0183 Commands 57 5 6 1 Standard Commands 58 5 6 2 Proprietary Comma...

Page 11: ...422 25 Figure 2 5 Evaluation Module RS 232 RS 422 Configuration 26 Figure 2 6 Evaluation Module Antenna Output Voltage 27 Figure 2 7 ABX 3 MBX 3 Internal Signal Splitter Option 28 Figure 3 1 SBX 3 Fr...

Page 12: ...SBX 3 Reference Manual xii...

Page 13: ...le Port Settings 41 Table 5 1 NMEA Message Elements 55 Table 5 2 SBX 3 NMEA Messages 56 Table 5 3 SBX 3 Baud Rates 62 Table 6 1 Troubleshooting 73 Table A 1 SBX 3 OEM Beacon Receiver Specifications 75...

Page 14: ...SBX 3 Reference Manual xiv...

Page 15: ...PS corrections broadcast by radiobeacons adhering to standards such as International Telecommunications Union M 823 and various broadcast standards in the frequency range between 283 5 to 325 0 kHz Or...

Page 16: ...acon listing and how to obtain this document on the Internet The Further Reading section provides a listing of GPS and DGPS sources for further information The Index provides a listing of the location...

Page 17: ...ning any product to CSI Wireless If you are returning a product for repair you must provide a fault description before CSI Wireless will issue an RMA number When providing the RMA number CSI Wireless...

Page 18: ...allation configuration and operation of the SBX 3 beacon receiver and the Evaluation Module Note Notes outline important information of a general nature Caution Cautions inform of possible sources of...

Page 19: ...tely 22 000 km ground control facilities and end users of the system 1 1 1 How it Works GPS satellites transmit coded information to users at UHF frequencies 1 575 GHz that allows user equipment to ca...

Page 20: ...This intentional degradation is called Selective Availability SA For many positioning and navigation applications an accuracy of 100 meters is insufficient and differential positioning techniques must...

Page 21: ...acy but are very expensive and often limited to precise survey applications due to technical constraints 1 3 DGPS Format For manufacturers of GPS equipment commonality is essential to maximize the uti...

Page 22: ...strength of a signal decreases with distance from the transmitting station due in large part to spreading loss This loss is a result of the signal s power being distributed over an increasing surface...

Page 23: ...nosphere becomes more reflective and typically is only significant on the edge of coverage areas Fading is not usually an issue in regions with overlapping coverage from multiple beacons and is consid...

Page 24: ...s broadcast so that a beacon receiver demodulating the data from the broadcast does not lose lock when the beacon station has no new data to transmit The Type 7 message contains the radiobeacon almana...

Page 25: ...Many factors affect the positioning accuracy that a user may expect from a DGPS system The most significant of these influences include Proximity of the remote user to the reference station Age of the...

Page 26: ...late corrections The data rate of the radio link The time it takes the signal to reach the user The time required for the remote differential receiver to demodulate the signal and communicate it to th...

Page 27: ...will result Satellite signals received by the GPS receiver through a reflection from an object can decrease positioning accuracy These multipath signals increase the measured range to a satellite as t...

Page 28: ...matic and manual tune modes for versatility NMEA 0183 command protocol for configuration operation and monitoring of receiver performance Various baud rates for compatibility with differential ready G...

Page 29: ...Antenna This antenna referred to as an E field whip antenna is sensitive to the electrical field of the radiobeacon broadcast A band pass filter and integral low noise amplifier are contained in the...

Page 30: ...n a GRP raydome housing for use on either fixed wing or rotary aircraft The ABL 1 is installed horizontally on either the top or bottom of the aircraft fuselage 1 9 4 MGL 3 Combined GPS Magnetic Field...

Page 31: ...iver and AM FM radio The coupler passes the AM FM signal to the radio unchanged and amplifies the beacon band for output to the beacon receiver through a BNC socket connector The AVL 1 requires 12 VDC...

Page 32: ...SBX 3 Reference Manual 14...

Page 33: ...onxall 2 pin plug Data connection DB9 socket Power and Lock LED s Aluminum enclosure to provide radio frequency RF immunity and emissions protection Interface level translation from 5V HCMOS to either...

Page 34: ...ed on front panel part number 486 1062 xxx Additional SBX 3 Engine part number 801 1006 xxx Antenna one of MBA 3 part number 850 0016 xxx MBA 3A part number 804 4001 xxx MBL 3 part number 804 2002 xxx...

Page 35: ...receiver power and SBX 3 lock status respectively see Figure 2 1 When the red LED labeled PWR is illuminated the Evaluation Module is receiving 9 40 VDC from an external power source When the SBX 3 a...

Page 36: ...installed requiring only power data antenna and ground connections Figure 2 2 illustrates the required interface Caution By default the Evaluation Module provides 10 VDC across the antenna port Connec...

Page 37: ...tion Module To ensure optimum performance and ease of operation observe the following considerations when installing the Evaluation Module 2 5 1 Placement The Universal Mounting Bracket U bracket supp...

Page 38: ...ng Bracket U bracket as a template to plan when drilling mounting holes 2 5 2 Environmental Considerations The Evaluation Module is designed to operate within an enclosed environment where the tempera...

Page 39: ...Do not operate the Evaluation Module with the 1 5 A fuse bypassed 2 5 4 Grounding the Evaluation Module For best performance and RF noise mitigation connect the SBX 3 Evaluation Module to a counterpoi...

Page 40: ...ry serial port as Port 0 and the secondary port as Port 1 Table 2 3 Evaluation Module Data Pin out RS 232C Interface Level Pin Signal Description 2 Transmit Port 0 RTCM SC 104 NMEA Status Output 3 Rec...

Page 41: ...face level must have both positive and negative signals connected in order to communicate The transmit line from the GPS engine to Port 0 of the SBX 3 does not need to be connected unless the GPS engi...

Page 42: ...of the Evaluation Module only the main serial port of the SBX 3 is accessible 2 T X 1 2 T X 1 6 T X 2 6 T X 2 8 R X 2 8 R X 2 5 G N D 5 G N D G N D G N D G N D G N D R T C M R T C M N M E A N M E A T...

Page 43: ...of integrated GPS receiver products communicate at the RS 232 level similar to a PC computer However there are a number of chart plotting devices incorporating GPS capabilities that operate at the RS...

Page 44: ...wer position as viewed in Figure 2 5 the receiver communicates at the RS 232C level When set to the upper position the receiver communicates at the RS 422 level The interface level corresponding to th...

Page 45: ...Antenna Power Antenna Power Figure 2 6 Evaluation Module Antenna Output Voltage 2 8 SBX 3 Evaluation Module S Splitter Option The SBX 3 Evaluation Module S includes an optional Internal Signal Splitte...

Page 46: ...gn CSI Wireless will provide documentation to incorporate the CSI Wireless Signal Splitter within the integration upon the signing of an agreement Please contact your CSI Wireless Sales representative...

Page 47: ...ide of the board in relation to the header connectors One LED is for signaling the power on status of the receiver labeled with PWR silk screening and the other is for indication of signal acquisition...

Page 48: ...5 kHz to 325 kHz from an antenna into its front end where it is filtered mixed and converted to a digital output The Digital Signal Processor DSP demodulates GPS correction information from the digita...

Page 49: ...tor Memory DSP 283 5 to 325 kHz Antenna Input Mixer RTCM Output and NMEA Control Input NMEA Status Output Figure 3 2 SBX 3 Block Diagram 3 3 SBX 3 Mechanical Layout Figure 3 3 details the physical lay...

Page 50: ...r input and signal distribution The J2 connector is a 2 x 12 pin header with 0 1 spacing that provides access to antenna power input receiver serial ports receiver power external reset and external lo...

Page 51: ...ternal Reset Input External Reset Input active low 21 22 Ground System Ground 23 24 Ground System Ground 3 4 1 Antenna Interface Power may be supplied to the antenna externally through the SBX 3 OEM b...

Page 52: ...to indicate that the SBX 3 is locked to a beacon signal and is demodulating RTCMSC 104 data The maximum power available from this pin is 1 5 mA 5 VDC The output of this signal may be transistor buffe...

Page 53: ...to a GPS receiver while allowing monitoring of SBX 3 performance via NMEA response messages on Port 1 Separating RTCM differential data from NMEA status data when output via the same serial port pose...

Page 54: ...the GPS receiver to tune and monitor SBX 3status the second serial port of the SBX 3 eliminates the requirement to develop a NMEA message parsing algorithm With this type of architecture the SBX 3 s...

Page 55: ...d 5 5 6 TXD1 2 8 RXD1 3 Figure 3 6 depicts the function of the Y data cable 2 T X 1 2 T X 1 6 T X 2 6 T X 2 8 R X 2 8 R X 2 5 G N D 5 G N D G N D G N D G N D G N D R T C M R T C M N M E A N M E A T X...

Page 56: ...Beacon Search ABS mode by default selecting and tuning to the most appropriate beacon without operator intervention The SBX 3 uses its two independent channels to identify and lock to the best DGPS be...

Page 57: ...tive strength to other non DGPS beacon signals in the 283 5 to 325 0 kHz band As this frequency range is a navigation band it is shared with other navigation aides such as non directional beacons used...

Page 58: ...e mode is dependent upon the data rate of the station In Full Manual Tune mode with an MSK rate of 200 bps signal acquisition should occur within 5 seconds if no demodulation errors occur Signal acqui...

Page 59: ...2 VDC to either Pin 4 of J1 with an antenna power ground connection on Pin 1 of J1 Or Pin 1 of J2 with an antenna power ground connection to Pin 22 of J2 3 Antenna Signal Input to SBX 3 Connect the co...

Page 60: ...P003 5 2 Channel DGPS Version 008 PCSI F3040 0 R100 0 C0 0 PCSI F2835 0 R100 0 C1 0 6 When powered for the first time the SBX 3 will operate in the default ABS mode and will conduct a Global Search t...

Page 61: ...t Beacon antennas are designed to pick up any radio frequency energy within the 283 5 to 325 0 kHz beacon band Both beacon signals and environment noise will be picked up by the antenna and amplified...

Page 62: ...SBX 3 Reference Manual 44 navigation electronics to achieve certain levels of electro magnetic emissions...

Page 63: ...tromagnetic Interference EMI including DC motors alternators solenoids radios power cables display units and other electronic devices If a radar is present mount the antenna outside the path of the ra...

Page 64: ...If lock is lost and not regained after 3 minutes move the antenna to another location on the vessel vehicle If the average SNR recorded when auxiliary equipment is powered differs by less than 2 or 3...

Page 65: ...is limited you may rail mount the antenna using suitable mounting hardware The following list provides instructions to install the MBA 3 on a marine pole mount Install the pole mount in the desired lo...

Page 66: ...removable BNC P connector The BNC P connector of the MBA 3A is removable to aid in routing the cable through a bulkhead with a minimal opening Do not cut the connector of the MBA 3A off in order to ru...

Page 67: ...3 does not require an antenna ground connection Note Mount this antenna 8 cm 3 inches above any metal surface upon which it is installed Caution Antennas threaded onto a mount should be tightened only...

Page 68: ...with a clear unobstructed view of the sky and 8 cm 3 inches away from any metal surface Caution Antennas threaded onto a mount should be tightened only by hand Over tightening may cause damage to the...

Page 69: ...ll the AVL 1 Unplug the AM FM antenna from the AM FM radio within the vehicle Plug the AM FM antenna into the AVL 1 port labeled AM FM Antenna Plug the port labeled AM FM Radio into the AM FM radio Co...

Page 70: ...at the receiver end Secure along the cable route using plastic tie wraps Caution By default the SBX 3 Evaluation Module provides 10 VDC across the antenna port Connection to incompatible devices may r...

Page 71: ...he common 5 8th inch thread 4 3 2 Permanent Mount A stainless steel permanent mount P N 604 0002 000 is available for installation of the MBA 3 MBA 3A MBL 3 MGW 1 or MGL 3 antennas It consists of a ho...

Page 72: ...rol and status information To implement these functions the SBX 3 is capable of processing a subset of standard NMEA 0183 messages along with a selection of proprietary NMEA 0183 formatted messages NM...

Page 73: ...is available To issue NMEA commands use a terminal utility running on a PC computer You may type these commands into the terminal window once you have matched the communication parameters between the...

Page 74: ...wireless com 5 4 Supported NMEA Messages Both ports of the SBX 3 support the NMEA commands and queries listed in Table 5 2 The second serial port of the SBX 3 recognizes the same NMEA commands and que...

Page 75: ...ance parameters PCSI 0 Proprietary Lists available proprietary PCSI commands and queries PCSI 1 Proprietary Displays receiver operating parameter status PCSI 2 Proprietary Queries the receiver for ope...

Page 76: ...es manual frequency selection ddd MSK bit rate 100 or 200 bps M Designates manual MSK bit rate selection n Output period of the performance status message 0 to 100 seconds CRMSS When this message is a...

Page 77: ...er with the n field set to zero 5 6 1 2 Partial Manual Tune Command GPMSK This command instructs the SBX 3 to tune to a specified frequency and automatically select the correct MSK rate It has the fol...

Page 78: ...d in this message is non zero the status data message output by the SBX 3 may interrupt the flow of RTCM data to the GPS receiver Re power the SBX 3 to stop the output of the CRMSS message or re tune...

Page 79: ...able to filter the NMEA message causing the overall data to fail parity checking When power to the SBX 3 is removed and reapplied the status output interval resets to zero no output Section 5 7 1 2 d...

Page 80: ...ommand PCSI 5 This proprietary PCSI command instructs the SBX 3 primary and secondary communications ports to specified baud rates PCSI 5 rP0 rP1 CR LF Response PCSI ACK 5 rP0 rP1 CR CL In this messag...

Page 81: ...e frequency in kHz 283 5 325 kHz 0 Auto The ddd field represents the desired MSK bit rate in bits per second 100 200 bps 0 Auto 5 7 NMEA 0183 Queries This section discusses the standard and proprietar...

Page 82: ...he selection of valid standard NMEA 0183 queries and their responses 5 7 1 1 Receiver Operating Status Query GPCRQ This standard NMEA query prompts the SBX 3 for its operational status It has the foll...

Page 83: ...f RTCM data from the main serial port when the receiver has acquired a lock on a beacon station 5 7 1 2 Receiver Performance Status Query GPCRQ This standard NMEA query prompts the SBX 3 for its perfo...

Page 84: ...PCSI 0 CR LF Response PCSI ACK 0 PCSI P003 0K 012 PCSI 0 HELP Msg PCSI 1 Status line A T S PCSI 2 Status line B T PCSI 3 Dump Search PCSI 4 Wipe Search PCSI 5 Port Rate P0 P1 PCSI 6 Reserved PCSI 7 R...

Page 85: ...output period 0 99 Optionally the Status Line A query can be issued requesting the output of the response message at a specified output rate It has the following format where T is the output period in...

Page 86: ...as issued When querying the primary receiver channel using the secondary serial port no interruptions in RTCM data output will occur on the primary port provided the SBX 3 has acquired a valid beacon...

Page 87: ...e same format as discussed above The Status Line B message output cannot be set to remain active after the power of the SBX 3 has been cycled The PCSI 2 query may be sent through the either serial por...

Page 88: ...2 0E 00 0013 45 3055 000 06 00 0011 PCSI 46 3060 000 06 00 0011 47 3065 000 06 00 0014 48 3070 000 06 00 0010 PCSI 49 3075 000 06 00 0012 50 3080 006 0E 00 0015 51 3085 000 06 00 0015 PCSI 52 3090 300...

Page 89: ...al 71 5 8 Firmware Updates Please contact CSI Wireless Customer Service for the latest firmware update for your SBX 3 receiver Firmware releases include a Field Upgrade Program installation instructio...

Page 90: ...SBX 3 Reference Manual 72...

Page 91: ...m 0 5 A No data from SBX 3 Check receiver power status power LED illuminated Verify that SBX 3 is locked to a valid beacon Lock LED illuminated Check integrity of power antenna and data cable connecti...

Page 92: ...fy communication parameter settings 8 data bits No parity 1 stop bit Verify communication levels of SBX 3 and GPS receiver are matched HCMOS vs RS 232C vs RS 422 Verify data cable connections No respo...

Page 93: ...Combination Antenna the ABL 1 Loop Antenna the External Antenna Signal Splitter Table A 1 SBX 3 OEM Beacon Receiver Specifications Operational Specifications Item Specification Frequency Range 283 5 3...

Page 94: ...em Specification Length 76 mm 3 0 Width 51 mm 2 0 Height 14 mm 0 5 Weight 0 25 g 0 88 oz Connector J1 1 x 4 pin header 0 1 spacing Connector J2 2 x 12 pin header 0 1 spacing Environmental Specificatio...

Page 95: ...Input Protocol NMEA 0183 Power Specifications Item Specification Input Voltage 9 40 VDC Input Current 140 mA 12 VDC Power Consumption 1 7 W Power Connector Circular 2 pin Locking Plug Mechanical Char...

Page 96: ...s and threaded nylon Mounting Thread 1 14 UNS 2B Length 371 mm 14 6 Diameter 39 mm 1 5 Weight 176 g 0 39 lb Ground Wire Length 1 3 m 51 0 Antenna Cable Pig Tail 297 mm 11 0 or 3 0 m 10 Antenna Connect...

Page 97: ...1 0 lb Antenna Connector TNC S Antenna Extension Cable RG 58U 150 m 450 ft in Length Environmental Specifications Item Specification Storage Temperature 40 C to 80 C Operating Temperature 30 C to 70...

Page 98: ...lb Antenna Connector TNC S Antenna Extension Cable RG 58U 15 m 45 ft in Length Environmental Specifications Item Specification Storage Temperature 40 C to 80 C Operating Temperature 30 C to 70 C Humi...

Page 99: ...tion Storage Temperature 40 C to 80 C Operating Temperature 30 C to 70 C Humidity 100 Condensing Table A 7 External Antenna Signal Splitter Specifications Insertion Loss Item Specification J2 J1 GPS F...

Page 100: ...Item Specification Storage Temperature 40 C to 80 C Operating Temperature 30 C to 70 C Humidity 95 Non Condensing Table A 8 MGW 1 Combined E field GPS Antenna Specifications Operational Specification...

Page 101: ...Extension Cable RG 58U 15 m 45 ft in Length Environmental Specifications Item Specification Storage Temperature 40 C to 80 C Operating Temperature 30 C to 70 C Humidity 100 Condensing Table A 9 AVL 1...

Page 102: ...Height 84 mm 3 33 Weight 350 g 0 77 lb Antenna Input 20 3 cm 8 0 pigtail with Motorola Female connector Beacon Output BNC socket AM FM Output 20 3 cm 8 0 pigtail with Motorola Male connector Environme...

Page 103: ...www csi wireless com This listing contains the following information regarding currently operating beacons and potential new sites Station name Frequency MSK rate Location Transmitting ID Reference s...

Page 104: ...SBX 3 Reference Manual 86...

Page 105: ...dio Technical Commission for Maritime Services RTCM Recommended Standards for Differential NAVSTAR GPS Service Version 2 2 Developed by Special Committee No 104 RTCM 1998 1800 Diagonal Rd Suite 600 Al...

Page 106: ...SBX 3 Reference Manual 88...

Page 107: ...ip Antenna 42 MBL 3 Loop Antenna 11 44 45 MGL 3 Combination Antenna 12 45 Automatic Beacon Search ABS 54 B Background Search 36 Baud Rate 17 23 37 C Cables Antenna 46 Data 20 Power 19 Connectivity 20...

Page 108: ...a 11 44 45 MGL 3 Combination Antenna 12 13 45 Multipath 9 N NMEA 0183 30 49 NMEA 0183 Command 52 55 Automatic Beacon Search 54 Full Manual Tune 52 Partial Manual Tune 53 Proprietary Tune 57 Reserved 5...

Page 109: ...9 28 30 31 39 49 S SBX 3 9 SBX 3 Block Diagram 28 SBX 3 Mechanical Layout 28 SBX 3 Receiver 27 28 29 30 31 37 38 39 Selective Availability SA 2 8 Splitter 13 25 T Temperature 18 Troubleshooting 65 U U...

Page 110: ...SBX 3 Reference Manual 92...

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