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SBX-4 Integrator Guide 

Appendix B-Technical Specifications 

Page B2 

 

 

 

 
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 

MSK bit rate 

50, 100 and 200 bps 

Operating modes 

Manual, automatic and database 

Cold start time 

< 1 minute typical 

Re-acquisition time 

< 2 seconds typical 

Demodulation 

Minimum shift key (MSK) 

Sensitivity 

2.5 microvolts/meter for 6 dB SNR @ 200 
bps 

Out of band rejection 

60 dB < 204 kHz and > 404 kHz 

Spurious response 

< -55 dB (0.1 MHz to 1.6 MHz) 

Ripple (in-band) 

3 dB 

Dynamic range 

100 dB 

Frequency offset 

+/- 8 Hz (~ 27 ppm) 

Adjacent channel rejection 

61 dB +/- 1 dB @ frequency center 
+/-400 Hz 

Antenna input impedance 

 50 Ohms 

Decoding 

RTCM 6/8 

Frequency selection 

Manual or offset 

 
 

 

Содержание SBX-4

Страница 1: ...875 0176 000 Integrator Guide SBX 4 OEM Board Revision B2 January 12 2018 ...

Страница 2: ...rks are the properties of their respective owners Patents Hemisphere GNSS products may be covered by one or more of the following patents U S Patents Australia Patents 6111549 6876920 7400956 8000381 8214111 2002244539 6397147 7142956 7429952 8018376 8217833 2002325645 6469663 7162348 7437230 8085196 8265826 2004320401 6501346 7277792 7460942 8102325 8271194 6539303 7292185 7689354 8138970 8307535...

Страница 3: ...eset Pin 11 Antenna Interface 12 Radio Frequency Immunity and Emissions 12 SBX 4 Dual Serial Port Overview 13 Single Serial Port Operation 13 Dual Serial Port Operation 13 Factory Default Settings 14 SBX 4 Integration Summary 14 Chapter 3 SBX 4 Operation 16 Introduction 1 Beacon Information 1 Operating Modes 2 Automatic Beacon Search ABS Mode 2 ABS Global Search 2 ABS Background Search 3 Manual Mo...

Страница 4: ...s a global navigation satellite system implemented by the United States NMEA National Marine Electronics Association NMEA is a marine electronics organization that sets standards for communication between marine electronics RTCM Radio Technical Commission for Maritime Services RTCM is a standard used to define RTK message formats so that receivers from any manufacturer can be used together SBAS Sa...

Страница 5: ...SBX 4 Integrator Guide Chapter 1 Introduction Page 1 of 22 Chapter 1 Introduction Product Overview ...

Страница 6: ...re significant electronics expertise such as power supply design serial port level translation reasonable radio frequency competency an understanding of electromagnetic compatibility and circuit design and layout The SBX 4 engine is a low level module intended for custom integration with the following general integration requirements Regulated power supply input 3 3 VDC 3 and 70 mA continuous Low ...

Страница 7: ...ntegrating the SBX 4 Mechanical Layout LED Indicators SBX 4 Block Diagram 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 ...

Страница 8: ...22 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 ...

Страница 9: ...SBX 4 Integrator Guide Chapter 2 Integrating the SBX 4 Page 5 of 22 Figure 1 2 SBX 4 bottom view ...

Страница 10: ...SBX 4 Integrator Guide Chapter 2 Integrating the SBX 4 Page 6 of 22 Figure 1 3 SBX 4 side view ...

Страница 11: ...e power on status of the receiver labeled with PWR silk screening The green LED is for indicating signal acquisition labeled with LOCK silk screening 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 l...

Страница 12: ...nna 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 Figure 1 3 provides a view of the block diagram Figure 1 5 displays the block diagram Figure 1 5 Block diagram ...

Страница 13: ...nector J200 Table 1 1 SBX 4 connector J200 pin out Samtec TSW 10407 G S Pin Signal Description 1 3 Ground Analog ground 2 RF signal input Antenna RF signal input 4 Antenna power output Antenna power supply 5 VDC Table 1 2 provides pin out information for connector J300 Table 1 2 SBX 4 connector J300 pin out Samtec TSW 11207 G D Pin Signal Description 1 2 Antenna power in Antenna power supply input...

Страница 14: ...nt to voltages up to the level of the supplied input voltage 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 The output of this signal may be transistor buffered within your integration if...

Страница 15: ...ng 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 Figure 1 7 illustrates an example reset switch circuit Figure 1 7 Reset switch circuit ...

Страница 16: ...ble to interface the antenna to the SBX 4 follow these instructions 1 Connect the center conductor of the coaxial cable to Pin 2 of J200 2 Connect the shield of the coaxial cable to Pin 1 or Pin 3 of J200 Radio Frequency Immunity and Emissions When integrating the SBX 4 ensure that complete integration does not emit significant noise within the 283 5 to 325 0 kHz beacon band In band interference i...

Страница 17: ...rom RTCM data output by Port 0 through a parsing routine without causing a parity failure of the RTCM it is necessary to take advantage of the fact that and LF are not supported within the RTCM specification provided there are no bit errors in the RTCM stream to start with Therefore if a is received then it should be considered as the beginning of a NMEA sentence and a LF should be expected within...

Страница 18: ...o Pin 3 of J300 with the power return connection at Pin 21 of J300 2 Antenna Power Input Apply 5 VDC to either Pin 4 of J200 with an antenna power ground connection on Pin 1 of J200 or Pin 1 of J300 with an antenna power ground connection to Pin 1 of J200 3 Antenna Signal Input to SBX 4 Connect the coaxial cable center conductor to Pin 2 of J200 and the shield to Pin 3 of J200 4 SBX 4 Serial Ports...

Страница 19: ...e primary receiver channel has acquired a beacon the receiver s second channel will conduct a background search 7 When the SBX 4 receives a valid RMC message on Port 0 it will switch to database mode 8 You may tune the receiver to a specific beacon using the GPMSK Manual Tune command referred to in Hemisphere GNSS Technical Reference Manual 9 When tuned to a valid beacon the SBX 4 monitors RTCM SC...

Страница 20: ...SBX 4 Integrator Guide Chapter 3 SBX 4 Operation Page 16 of 22 Chapter 3 SBX 4 Operation Introduction Beacon Information Operating Modes New SBX 4 Commands Evaluating Performance ...

Страница 21: ...station based on its current location and distance to the internal list of station locations This chapter includes information on the following topics Beacon information Operating modes Evaluating performance Beacon Information The International Association of Marine Aids to Navigation and Lighthouse Authorities IALA endeavors to maintain an accurate listing of DGPS radio beacons worldwide that is...

Страница 22: ...Table The receiver uses these measured values to compute an average SS noise floor and to sort the frequencies in descending order of SS This initial phase of the GS takes approximately 3 to 4 seconds to scan all 84 beacon channels in the frequency band using both channels Once scanned and with SS numbers identified for each beacon channel both receiver channels cooperatively examine the frequenci...

Страница 23: ... signal acquisition should occur within 5 seconds if no demodulation errors occur Signal acquisition should occur within 10 seconds for a modulation rate of 100 bps provided that no demodulation errors occur Partial Manual Tune mode requires that the SBX 4 identify the correct MSK rate automatically This automatic detection could result in signal acquisition rates of up to approximately 15 seconds...

Страница 24: ...SI 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 Mendocino CA 2920 14718 22641 1 0 PCSI 3 3 0272 0273 0886 Fort Stevens OR 2870 16817 22559 1 0 PCSI 3 3 0304 0305 0907 Richmond BC 3200 17903 22407 1 0 PCSI 3 3 0276 0277 0888 Whidbey Is WA 3020 17...

Страница 25: ...llings MT 3130 0 389 0 0 1 1 PCSI 3 2 871 Appleton WA 3000 0 420 0 0 1 1 PCSI 3 2 908 Amphitrite Pt BC 3150 0 448 0 0 1 1 PCSI 3 2 886 Fort Stevens OR 2870 0 473 0 0 1 1 PCSI 3 2 909 Alert Bay BC 3090 0 480 0 0 1 1 Notes Distance is calculated in nautical miles The name field will display time date of update for a station added by using information from an almanac message in the format ddmmyy time...

Страница 26: ...espect to beacon reception The SNR is available in the CRMSS NMEA message described in Hemisphere GNSS Technical Reference Manual The SNR is also a function of the installation as it may differ between locations depending on the amount of local noise at each The optimum antenna location will be the position where your average SNR is highest You should turn on all accessories that you intend to use...

Страница 27: ...SBX 4 Integrator Guide Appendix A Troubleshooting Page A7 Appendix A Troubleshooting ...

Страница 28: ...ked to a valid beacon Lock LED illuminated Check integrity of power antenna and cable connections Random data from SBX 4 Check transmitting beacon status Verify baud rate of SBX 4 and terminal device SBX 4 default baud rate 4800 bd Ensure pin 18 of J300 is tied highif Port 1 is not being used Low SNR Check integrity of antenna connections Check MBA 3 antenna ground Select alternate antenna positio...

Страница 29: ... device SBX 4 default baud rate 4800 bd Verify communication parameter settings 8 data bits no parity 1 stop bit Check integrity of data cable connections Verify pin connectivitybetween SBX 4 and terminal device Non differential GPS output Verify SBX 4 lock status Verify matched SBX 4 outputand GPS RTCM input baud rates Verify GPS receiver RTCM compatibility Verify GPS receiver DGPS configuration ...

Страница 30: ...SBX 4 Integrator Guide Appendix B Technical Specifications Page B1 Appendix B Technical Specifications ...

Страница 31: ...pacing 500 Hz MSK bit rate 50 100 and 200 bps Operating modes Manual automatic and database Cold start time 1 minute typical Re acquisition time 2 seconds typical Demodulation Minimum shift key MSK Sensitivity 2 5 microvolts meter for 6 dB SNR 200 bps Out of band rejection 60 dB 204 kHz and 404 kHz Spurious response 55 dB 0 1 MHz to 1 6 MHz Ripple in band 3 dB Dynamic range 100 dB Frequency offset...

Страница 32: ... to 5 5 VDC Power consumption 0 25 W 3 3 VDC no antenna Current consumption 70 mA 3 3 VDC no antenna Antenna voltage output 5 VDC applied externally Table B 4 Mechanical Item Specification Dimension 76 2 mm L x 50 8 mm W x 13 8 mm H 93 0 in L x 2 0 in W x 0 54 in H Weight 30 0 g 1 1 oz Connector J200 1 x 4 pin header 2 54 mm 0 1 in spacing Connector J300 2 x 12 pin header 2 54 mm 0 1 in spacing Ta...

Страница 33: ... warrants for 90 days from performanceordelivery orforthebalanceof the original Warranty Period whichever is greater that the Update under normal use and maintenance will conform in all material respects to the documentation provided with the Update and any media will be free of defects in materials and workmanship Notwithstanding the foregoing Hemisphere does not warrant that the Software will me...

Страница 34: ...ime without cause Hemisphere may terminate this Agreement on 30 days notice to Licensee if Licensee fails to materially comply with each provision of this Agreement unless such default is cured within the 30 days Any such termination by a party shall be in addition to and without prejudice to such rights and remedies as may be available including injunction and other equitable remedies Upon receip...

Страница 35: ...rmance or accuracy of any Product HEMISPHERE IS NOT RESPONSIBLE FOR PURCHASER S NEGLIGENCE OR UNAUTHORIZED USES OF THE PRODUCT IN NO EVENT SHALL Hemisphere GNSS BE IN ANY WAY RESPONSIBLE FOR ANY DAMAGES RESULTING FROM PURCHASER S OWN NEGLIGENCE OR FROM OPERATION OF THE PRODUCT IN ANY WAY OTHER THAN AS SPECIFIED IN Hemisphere GNSS s RELEVANT USER S MANUAL AND SPECIFICATIONS Hemisphere GNSS is NOT R...

Страница 36: ...Hemisphere GNSS Inc 8515 East Anderson Drive Suite A Scottsdale Arizona US 85255 Phone 480 348 6380 Fax 480 270 5070 precision hgnss com www hgnss com ...

Страница 37: ......

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