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TW5310 User Manual 

 

 

10 

©2011 Tallysman Wireless, Inc.  

Confidential

 

Note 2:  If you are using the Visual GPS software utility to display TW5310 outputs, the 
GSV message should be enabled to view satellite signal strengths. 

4.3

 

1PPS 

 

Differential 1PSS outputs at RS422 levels are provided. The 1PPS signal is synchronized 
to UTC to within 100 nanoseconds. The rising edge of the 1PPS signal is synchronized to 
the start of UTC time.   

See section 3 for wiring details 

 

250 ms

750ms

1PPS_A

1PPS_B

0V

3V

0V

3V

 

 

Figure 6 

 

The default pulse width is 250 ms, but is configurable from 100 ms to 500 ms. 

 

After  having  obtained  a  GPS  fix,  the  1PPS  output  will  be  accurately  maintained  even 
when tracking only one satellite. Once synchronized the 1PPS maintains synchronization 
accuracy with no GPS reception by fly-wheeling for a period, see “1PPS Finish delay” in 
section 4.5. 

 

Signal levels are differential, 0.V to 3.3V. 

Содержание TW5310

Страница 1: ...TW5310 GPS Receiver Antenna User Manual Visit us on the web www tallysman com Document 61 0009 0 ...

Страница 2: ...hts Reserved This document and the subject matter herein are proprietary items to which Tallysman Wireless Inc retains an exclusive right to reproduction manufacture and sale This document is submitted in confidence for the use of the recipient alone or in conjunction with Tallysman Wireless Inc and its licensees and for no other purpose whatsoever unless permission for further disclosure is expre...

Страница 3: ...W5310 Connections 9 4 1 Power 9 4 2 NMEA output 9 4 3 1PPS 10 4 3 1 1PPS Single ended termination 11 4 4 Cable Delays 11 4 5 1PPS Qualification 12 4 6 Baud Rate 12 4 7 Satellite Based Augmentation System SBAS 13 5 TW5310 Installation 13 6 NMEA Message Reference 15 6 1 NMEA Field Types 15 6 1 1 RMC 16 6 1 2 GGA 17 6 1 3 GSA 18 6 1 4 GSV 18 6 1 5 VTG 19 7 TW5XXX Configurator 20 7 1 Parameter Fields ...

Страница 4: ...nments where multipath interference is prevalent Available with brick wall filter option to eliminate possible interference from Lightsquared transmissions Figure 1 TW5310 The TW5310 is a through hole mount GPS receiver antenna housed in an industrial grade weatherproof IP67 enclosure It provides NMEA 0183 standard output at RS232 levels Differential 1 pulse per second 1PPS outputs are provided at...

Страница 5: ...rated GPS Receiver Antenna 16 channel simultaneous operation High performance tracking 159dBm Fast time to first fix SBAS Capable Low noise LNA and SAW band pass filter GPS output NMEA 0183 output Differential 1PPS output 1PPS Qualification Configuration information saved across power cycles Waterproof enclosure IP67 TW5310 Configuration application RoHS compliant Optional Brickwall pre filter ...

Страница 6: ...tible with most third party applications that are capable of decoding standard NMEA 0183 messages The following open source GPS utility can be used to display the NMEA output sentences graphically http www visualgps net VisualGPS 2 2 Configurator Tallysman provides a Windows based Configurator application Part 42 0004 0 to configure the operating parameters of the TW5XXX See section 7 for configur...

Страница 7: ...gure 3 Wiring connections are indicated in Table 1 Wire Color Signal Comments RJ45 pin Brown Power 12V 8 Brown White Gnd 0V 7 Blue White RX into the TW5310 RS232 level 6V 5 Orange TX out of the TW5310 RS232 level 6V 6 Orange White Differential 1PPS output 1PPS_B 0 to 3 3V levels 3 Blue Differential 1PPS output 1PPS_A 0 to 3 3V levels 4 White Green 1PPS_A N A 1 Green 1PPS Qualification 0 to 3 3V le...

Страница 8: ...Gnd Black Power Power GND GND DB9F Shell RX into PC 2 TX out of PC 3 TW53XX Debug cable 27 0045 0 Rev 1_0 RX TX 1PPS Valid GPIO_A 1 ft Flying Leads 22AWG GPIO_B 5 GND 1 8 2 3 4 5 6 1PPS_A 1PPS_B Pinouts shown for a CROSS OVER Connector 1PPS_A 1PPS_B 1PPS Valid GPIO_A GPIO_B 7 Figure 5 Note The RJ45 pin connections on the test cable assume a CROSS over Block to connect to the TW5310 ...

Страница 9: ...utput once per second in NMEA format The NMEA RX and TX outputs are at RS232 levels The default output from the TW5310 is 3 digit GGA and RMC messages at 4800 baud but can be configured to output 4 or 5 digit resolution The TW5310 can be configured to output the following NMEA sentences using the Tallysman TW5XXX Configurator RMC The RMC message is the recommended minimum data for GPS GGA The GGA ...

Страница 10: ...s The rising edge of the 1PPS signal is synchronized to the start of UTC time See section 3 for wiring details 250 ms 750ms 1PPS_A 1PPS_B 0V 3V 0V 3V Figure 6 The default pulse width is 250 ms but is configurable from 100 ms to 500 ms After having obtained a GPS fix the 1PPS output will be accurately maintained even when tracking only one satellite Once synchronized the 1PPS maintains synchronizat...

Страница 11: ...A or 1PPS_B can be used as the single ended output 1K Ohm 1PPS_A 1PPS B Gnd 1PPS_A 1PPS B 500 Ohms 500 Ohms Figure 7 4 4 Cable Delays The timing of the 1PPS pulse depends on the length of both antenna and interface cables The 1PPS signal can be adjusted to provide a synchronized UTC second at the users end point Cable delays of 1 to 200ns can be configured To account for cable delays add 3ns for e...

Страница 12: ...clocks and provide a stable 1PPS output On loss of 1PPS qualification status the 1PPS qualification output is maintained for the 1PPS Stop delay During the 1PPS Stop delay time the TW5310 flywheels to maintain timing 0V 3 3V 1PPS Qualification output 1 PPS Qualification status 1PPS Qual Start delay 1PPS Qual stop delay Figure 8 The signal levels 0V to 3 3V The default 1PPS Qual Start and Stop dela...

Страница 13: ...ure the SBAS satellite ID closest to your Location see Table 2 below Satellite Name NMEA Satellite ID PRN Location Inmartsat 4F3 46 133 98 W Galaxy 15 48 135 133 W Anik F1R 51 138 107 3 W Inmarsat 33 120 15 5 W ARTEMIS 37 124 21 5 E Test Inmarsat 4 F2 39 126 25 E Inmarsat 3 F1 44 131 64 5 E MTSAT 1R 42 129 140 E MTSAT 2 50 137 145 E Table 2 The default satellite ID is 133 Suitable for longitudes o...

Страница 14: ...4 2011 Tallysman Wireless Inc Confidential For best results the TW5310 GPS Receiver Antenna should installed with a clear view of the sky The GPS Receiver Antenna will obtain a 3D fix GPS fix with a minimum of 4 satellites ...

Страница 15: ...C and GGA outputs 6 1 NMEA Field Types NMEA message fields have the following format Status A Yes Data valid V No Data invalid Latitude llll lllll ddmm mmmmm Longitude yyyyy yyyyyy dddmm mmmmm Time hhmmmsslss HoursMinutesSeconds decimalSeconds Defined Fields Predefined Constants most often alpha characters Numeric Numbers x x Digit decimalDigit Fixed Hex Fields hh__ MSB to the left Information fie...

Страница 16: ...ssage is the recommended minimum data for GPS GPRMC hhmmss ss a llll lllll a yyyyy yyyyy a x x x x ddmmyy x x a hh RMC Recommended Minimum Specific GPS TRANSIT Data GPRMC 204804 000 V 4520 254 N 07554 206 W 0 0 0 0 200608 0 0 W 7E The following fields are listed in the order shown in the comma separated sentence 1 UTC of position fix 2 Data status A Data valid V navigation receiver warning 3 Latit...

Страница 17: ... S 4 Longitude 5 E or W 6 GPS quality indicator 0 invalid 1 GPS fix 2 Diff GPS fix 7 Number of satellites in use not those in view 8 Horizontal dilution of position 9 Antenna altitude above below mean sea level geoid 10 Meters Antenna height unit 11 Checksum 11 Geoidal separation Diff Between WGS 84 earth ellipsoid and mean sea level geoid is below WGS 84 ellipsoid 12 Meters Units of geoidal separ...

Страница 18: ...arated sentence 1 Mode M Manual forced to operate in 2D or 3D A Automatic 3D 2D 2 Mode 1 Fix not available 2 2D 3 3D 3 14 Ids of SVs used in position fix null for unused fields 15 PDOP 16 HDOP 17 VDOP 18 Checksum 6 1 4 GSV The GSV message provides detailed satellite data GPGSV x x xx xx xx xxx xx xx xx xxx xx hh GS Number of SVs in view PRN numbers elevation azimuth SNR values GPGSV 3 1 11 03 12 1...

Страница 19: ...d 4 7 16 19 Information about fourth SV same as field 4 7 20 Checksum 6 1 5 VTG The VTG message provides vector track and speed over ground GPVTG hhh hh a hhh hh a x xx a xx x a hh VT Course over Ground and Ground Speed GPVTG 0 0 T M 0 0 N 0 0 K 60 1 Measured heading 2 reference True 3 Measure heading 4 reference Magnetic 5 Horizontal speed knots 6 Units knots 7 Horizontal speed km hour 8 Units km...

Страница 20: ...r Manual 20 2011 Tallysman Wireless Inc Confidential 7 TW5XXX Configurator Tallysman provides a Windows based Configurator application Part 42 000409 for configuration of the TW5300 operating parameters Figure 9 ...

Страница 21: ...S is output when set 1PPS on trailing edge 1PPS signal by default is output on the leading edge of the pulse Enabling causes the 1PPS output on the trailing edge NMEA Messages Select NMEA sentences to be output The default messages output are RMC and GGA If additional messages are output the baud rate will need to be increased to handle the output of additional data GPS Mask Angle degrees Sets the...

Страница 22: ...quality 1PPS Qual Stop Delay This is the period that the TW5310 can freewheel during loss of GPS fix before the 1 PPS Qualification output is disabled 1PPS Qual Start Delay This is the period that the TW5310 waits after detection of the qualification status before outputting a 1PPS qualification signal The TW5310 uses this period to ensure that the TW5300 has time to average out the satellite cloc...

Страница 23: ...Write Set the TW5310 Configurator to the COM port speed of the TW5310 4800 baud is default Select Program Read to read the parameters in the TW5300 To write a new set of parameters to the TW5310 select Program Write The configuration file can be save by selecting File Save ...

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