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Summary of Contents for Hemisphere GPS SBX-4
- Page 1 875-0176-000 SBX-4 OEM Board Integrator Guide Revision: B2 January 12, 2018...
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Page 2: Copyright Notice
, L-Dif miniEclipse , PocketMax3 PC , PocketMax3 , PocketMax3 , S320 , SBX-4 , Vector ,and XF2 are proprietary trademarks of Hemisphere GNSS, Inc. Other trademarks are the properties of their respective owners. Patents Hemisphere GNSS products may be covered by one or more of the following patents: U.S. -
Page 3: Table Of Contents
Terms and Definitions ..........................iii Chapter 1: Introduction ..........................1 Product Overview ............................2 Chapter 2: Integrating the SBX-4 ........................3 Mechanical Layout ............................4 LED Indicators ............................. 7 SBX-4 Block Diagram ..........................8 ... -
Page 4: Terms And Definitions
Terms and Definitions The following table lists the terms and definitions used in this document Term Definition DGPS/DGNSS Differential GPS/GNSS refers to a receiver using Differential Corrections. Firmware Firmware is the software loaded into the receiver that controls the functionality of the receiver and runs the GNSS engine. -
Page 5: Chapter 1: Introduction
Chapter 1: Introduction Product Overview SBX-4 Integrator Guide Chapter 1 - Introduction Page 1 of 22... -
Page 6: Product Overview
This document provides instructions and recommendations related to a successful integration of the SBX-4 engine. The SBX-4 is an extremely sensitive 300 kHz minimum shift keying (MSK) demodulator. It obtains differential GPS corrections broadcast by radio beacons adhering to standards such as International Telecommunications Union M.823 and various broadcast standards in the frequency... -
Page 7: Chapter 2: Integrating The Sbx-4
SBX-4 Connector Pin Assignments Signal Lock Indicator Pin Reset Pin Antenna Interface Radio Frequency Immunity and Emissions SBX-4 Dual Serial Port Overview Factory Default Settings SBX-4 Integration Summary SBX-4 Integrator Guide Chapter 2 – Integrating the SBX-4 Page 3 of 22... -
Page 8: Mechanical Layout
Chapter 2: Integrating the SBX-4 OEM Board Mechanical Layout Figures 1-1 to 1-3 provide the physical layout of the SBX-4 beacon receiver, including dimensions and key components. Note: Figure 1-1 to Figure1-3 dimensions are in inches. Figure 1-1: Top-side view of SBX-4... - Page 9 Figure 1-2: SBX-4 bottom view SBX-4 Integrator Guide Chapter 2-Integrating the SBX-4 Page 5 of 22...
- Page 10 Figure 1-3: SBX-4 side view SBX-4 Integrator Guide Chapter 2-Integrating the SBX-4 Page 6 of 22...
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Page 11: Led Indicators
When power is applied to the SBX-4, the power LED illuminates and when the SBX-4 achieves signal acquisition on a valid DGPS beacon, the lock LED illuminates. Figure 1-4 shows the front and back of the SBX-4, including the illumination of the power and lock LED indicators. -
Page 12: Sbx-4 Block Diagram
SBX-4 Block Diagram The SBX-4 accepts an analog input signal between 283.5 kHz and 325.0 kHz from an antenna into its front end where it is filtered and converted to a digital output. The Digital Signal Processor (DSP) demodulates GPS correction information from the digital stream. The output of the SBX-4 is RTCM SC-104 DGPS correction data at a 3.3V CMOS interface level. -
Page 13: Sbx-4 Connector Pin Assignments
SBX-4 Connector Pin Assignments The SBX-4 has two header connectors designated as J200 and J300, labeled with on-board silk- screening. The J200 connector is a 1 x 4 pin header with 0.1 in (2.54 cm) spacing that provides antenna power input, and signal distribution. The J300 connector is a 2 x 12 pin header with 0.1 in (2.54 cm) spacing that provides access to antenna power input, receiver serial ports, receiver... -
Page 14: Signal Lock Indicator Pin
Signal Lock Indicator Pin Pin 16 of connector J300 may be used to drive an LED or sensor to indicate that the SBX-4 is locked to a beacon signal and is demodulating RTCM SC-104 data. The maximum current available from this pin is 5 mA at an input voltage 3.3 V. -
Page 15: Reset Pin
Reset Pin Pin 19 of connector J300 may be used to reset the SBX-4. Activating the reset circuit of the SBX- 4 results in the same effect as cycling the input power to the receiver. The operating configuration of the receiver before reset is maintained, including operating mode, baud rate, frequency and MSK rate of the last tuned station. -
Page 16: Antenna Interface
Pin 4 of connector J200 is internally connected to Pins 1 and 2 of connector J300. Antenna signal input to the receiver is provided via Pin 2 of J200. Note: The antenna input voltage is not current limited on the SBX-4 board. If current limiting is required, the circuitry must be provided within your integration. -
Page 17: Sbx-4 Dual Serial Port Overview
SBX-4 Dual Serial Port Overview The SBX-4 features two full duplex serial ports (Port 0 and Port 1). Use of the second serial port is an option as the SBX-4 supports identical functionality as its predecessor, the SBX-3 on Port 0. -
Page 18: Factory Default Settings
The following steps summarize the general requirements for integrating the SBX-4 and identifies the command and control features provided: SBX-4 Power Input - Apply a 3.3 VDC power input to Pin 3 of J300 with the power- return connection at Pin 21 of J300. - Page 19 $PCSI,F2835,0,R100,0,C0,0 $PCSI,F2835,0,R100,0,C1,0 6. When powered for the first time, the SBX-4 will operate in the default ABS mode and will conduct a Global Search (GS) to identify the highest quality beacon signal. Following the signal acquisition phase of the GS and when the primary receiver channel has acquired a beacon, the receiver’s second channel will conduct a...
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Page 20: Chapter 3: Sbx-4 Operation
Chapter 3: SBX-4 Operation Introduction Beacon Information Operating Modes New SBX-4 Commands Evaluating Performance SBX-4 Integrator Guide Chapter 3 – SBX-4 Operation Page 16 of 22... -
Page 21: Introduction
The SBX-4 is able to operate in manual or automatic tuning mode, or using Database mode which will select the closest station in compliance with IEC 61108-4 standards. In Database mode, the receiver will search for the closest station based on its current location and distance to the internal list of station locations. -
Page 22: Operating Modes
ABS Global Search When powered for the first time in ABS mode, the SBX-4 initiates a Global Search (GS), examining each available DGPS beacon frequency, and recording Signal Strength (SS) measurements in units of decibel micro volts to the Global Search Table. The receiver uses these measured values to compute an average SS, noise floor and to sort the frequencies in descending order of SS. -
Page 23: Abs Background Search
15 seconds. Database Mode This operating mode has been added to the SBX-4 in order to be compliant with the specification IEC 61108-4 for ship borne DGPS maritime radio beacon receiver equipment. The basic operation is outlined below. -
Page 24: New Sbx-4 Commands
NEW SBX-4 Commands Database tune command: $GPMSK,,D,,D<CR><LF> Display contents of station database: $PCSI,3,3<CR><LF> Response: $PCSI,3,3,IDref1,IDref2,StationID,name,freq,lat,long,datum,s tatus $PCSI,3,3, ... $PCSI,3,3, ... $PCSI,3,3, ... Example: $PCSI,3,3,0282,0283,0891,Level Island AK,2950,20554,- 24221,1,0 $PCSI,3,3,0306,0307,0906,Sandspit BC,3000,19377,- 23991,1,0 $PCSI,3,3,0278,0279,0889,Annette Is. AK,3230,20044,- 23951,1,0 $PCSI,3,3,0300,0301,0909,Alert Bay BC,3090,18412,- 23099,1,0 $PCSI,3,3,0302,0303,0908,Amphitrite Pt BC,3150,17806,- 22850,1,0 $PCSI,3,3,0270,0271,0885,C. - Page 25 Status: 0 (operational), 1 (undefined), 2 (no information), 3 (do not use) • Health: -1 (not updated), 8 (undefined), 0-7 (valid range) • WER: -1 (not updated), 0-100 (valid range) Status message: $PCSI,1,1<CR><LF> • SBX-4 Integrator Guide Appendix A-Troubleshooting Page A5...
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Page 26: Evaluating Performance
If noise is affecting performance, try to find a better location with higher SNR. Table 2-1 describes the general quality of reception as measured by the SNR reading of the SBX-4. Table 2-1: SBX-4 Performance - SNR reading... -
Page 27: Appendix A: Troubleshooting
Appendix A: Troubleshooting SBX-4 Integrator Guide Appendix A-Troubleshooting Page A7... - Page 28 Appendix A: Troubleshooting Table A-1 provides troubleshooting for common SBX-4 problems. Table A-1: Troubleshooting Symptom Possible solution No data from SBX-4 • Check receiver power status (power LED illuminated?) • Verify that SBX-4 is locked to a valid beacon (Lock LED illuminated) •...
- Page 29 • Verify frequency of transmitting beacon or choose Auto Frequency Mode • Check MBA-3 antenna • Verify SBX-4 antenna port output voltage (5 VDC) • Verify 5 VDC across antenna cable connector No response to NMEA • Verify baud rate settings of...
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Page 30: Appendix B: Technical Specifications
Appendix B: Technical Specifications SBX-4 Integrator Guide Appendix B-Technical Specifications Page B1... -
Page 31: Sbx-4 Specifications
Appendix B: Technical Specifications SBX-4 Specifications Tables B-1 to B-5 provide the SBX-4’s operational, serial interface, power, mechanical and environmental specifications. Table B-1: Operational Item Specification Channels 2-channel parallel tracking Frequency range 283.5 - 325.0 kHz Channel spacing 500 Hz... - Page 32 -30° C to +70° C (-22° F to +158° F) Operating temperature -40° C to +80° C (-40° F to +176° F) Humidity 95% non-condensing EN50081-4-2 ESD Output 5 VDC applied externally SBX-4 Integrator Guide Appendix B-Technical Specifications Page B3...
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