TW5340 User Manual - Tallysman Wireless
Contents
1. Figure 11 Select the current firmware build you are running Select where your custom firmware build will be output too Select Create Firmware button Loading new Firmware In the event that Tallysman Wireless releases an upgrade to the TW5340 firmware or you wish to write custom firmware including new default parameters to the TW5340 Select Program Load firmware Load Firmware 83 Load a firmware file onto the TW5340 Use Custom Firmware E Official Firmware Version 1 3 Mar 3 2015 tw5340_1003_RELEASE_svn2647 bin a Write Speed Fast Y Write Firmware Figure 12 To load Custom firmware using new default parameters select Use Custom Firmware And select the bin file to load To load a new firmware update to the TW5340 select Official Firmware Select the Write Speed based on PC Comm port capability 20 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 9 2 INTERFACE TAB Baud Rate default 115200 Sets the operating baud rate of the TW5340 If the baud rate is changed and written to the TW5340 remember to change the Configurator baud rate to match 9 3 GENERAL TAB Enable watchdog Enable to set the internal watchdog TW5340 resets when watchdog times out Enable Fix Quality output Enables output on Pin 2 of the TW5340 to indicate Fix Quality OK 1PPS Qualification Fix Quality Start Delay default2. TW5340 User Manual TRAIM Enable Enable disable the TRAIM algorithm Timing Receiver Autonomous Integrity Monitoring allows the receiver to remove satellites with timing errors in excess of a given timing threshold 1PPS Clock Mhz Set to 64 Mhz for highest accuracy 1PPS pulse Duration ms Duration of 1 PPS pulse the default configuration is 250ms 1PPS Correction Delay in ns This is a time correction to compensate for any 1PPS delays due to cable length or the RF chain Hold Position Latitude degrees Sets the latitude for the position hold mode Hold Position Longitude degrees Set the longitude of the position hold mode Hold Position Height meters Set altitude for the position hold mode 1PPS Elevation Mask degrees Sets the elevation mask angle of 1PPS 1PPS Satellite Threshold snr Fix quality evaluation only use satellites above SNR threshold 30 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 1PPS Fix condition GNSS fix condition for PPS generation NO FIX PPS signal is present even in GNSS NO fix conditions 2D FIX the PPS is present if the GNSS is at least in 2D fix condition 3D FIX the PPS is present only if the GNSS is in 3D fix conditions 1PPS reference time Sets the 1PPS time reference 1PPS Output 1PPS output enabled base on selection 1PPS Constellations The 1 PPS derived from GPS GLONASS or both
3. Tallysman Wireless A TIME AND PLACE for everything TW5340 Integrated GPS GLONASS Receiver Antenna User Manual Visit us on the web www tallysman com Document 61 0009 0 TW5340 User Manual Document Amendment Record Revision Rev 1_0 Rev 1 1 Rev 1 2 Rev 1 3 Rev 1 4 Copyright Date 7 Nov 2014 11 Nov 2014 10 Dec 2014 4 Mar 2015 6 May 2015 Comments Initial release Minor edits Edit of wake up pin TW5340 Rev 3 Standby Mode support Correction to configurator and clarification regarding 10 Hz operation Copyright 2014 2015 Tallysman Wireless Inc All Rights 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 expressly granted in writing Information in this document is subject to change without notice Tallysman Wireless Inc 106 Schneider Road Unit 3 Ottawa ON K2K 1Y2 Canada Tel 613 591 3131 Fax 613 591 3121 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Table of Contents E Introduction esena enre aA R N E ta A EEE E RE ack os EE A ramen a R Ei 5 A RC 7 2 1 Ordering Informa
4. Current Configuration message on startup Outputs the configuration parameters of the TW5340 on startup Use GNGSV in place of GLGSV or GPGSV The GSV message can be configured to be output with GN talker ID Use GNGSA in place of GLGSA or GPGSA The GSA message are be configured to be output with GN talker ID 23 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Decimal digits in GGA Sets the number of decimal digits in GGA output Decimal Digits in RMC and GLL Sets the number of decimal digits in RMC and GLL output NMEA Talker ID Default is P Assign a unique talker ID to these non constellation message types This NMEA talker ID relates to the following message types RMC GGA VTG GST GLL and ZDA Note Constellation related messages are automatically assigned on selection of constellation type GP indicates the GPS constellation GL indicates the GLONASS constellation GN indicates satellites for all constellations Delay from Fix to Start of Output Message output can be delayed related to time of the current fix This establishes a known offset from the receipt of the NMEA message to the time stamp within the message thus permitting reliable time transfer This feature only applies to the high priority message list 3 If the start of a NMEA out message is being used for timing purposes the fix rate should be set to 1 second and messag
5. 9 8 STANDBY TAB Enable Periodic Standby Enables the Standby mode low current consumption feature Sleep Time seconds Sets the sleep time in seconds Fix Time seconds Sets the navigation wake time to acquire a fix In order to refresh satellite ephemeris data the receiver should be configured to transitions to full power every 30 minutes and can remain awake for up to 3 minutes Maximum Awake Time Fix count The maximum number of attempts to get a fix before resuming standby mode 31 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 10 NMEA Message Reference NMEA 0183 sentences are all ASCII Each sentence begins with a dollar sign and ends with a carriage return linefeed lt CR gt lt LF gt Data is comma delimited A checksum is optionally added The first two letters following the are the talker identifier The next three characters sss are the sentence identifier followed by a number of data fields separated by commas followed by an optional checksum and terminated by carriage return line feed The data fields are uniquely defined for each sentence type RMC Recommended Minimum Navigation Information Fields UTC Time Status V Navigation receiver warning A Valid Latitude Nors Longitude E or W Speed over ground knots Track made good degrees true Date ddmmyy Magnetic Variation degrees E or W FAA mode indicator NMEA 2 3 and later C
6. M Manual forced to operate in 2D or 3D A Automatic 3D 2D Mode 1 no fix 2 2D fix 3 3D fix PRN number 01 through 32 for GPS 33 through 64 for SBAS 64 for GLONASS ID of 1st satellite used for fix ID of 2nd satellite used for fix ID of 3rd satellite used for fix ID of 4th satellite used for fix ID of 5th satellite used for fix ID of 6th satellite used for fix ID of 7th satellite used for fix ID of 8th satellite used for fix ID of 9th satellite used for fix ID of 10th satellite used for fix ID of 11th satellite used for fix ID of 12th satellite used for fix PDOP HDOP VDOP Checksum 2014 2015 Tallysman Wireless Inc Confidential 34 TW5340 User Manual GSV GSV Satellites in view These sentences describe the sky position of a UPS satellite in view Typically they re shipped in a group of 2 or 3 Field Total number of GSV messages to be transmitted in this group Origin number of this GSV message within current group Total number of satellites in view leading zeros sent Satellite PRN number leading zeros sent Elevation in degrees 00 90 leading zeros sent Azimuth in degrees to true north 000 359 leading zeros sent SNR in dB 00 99 leading zeros sent more satellite info quadruples like 4 7 n checksum Example SGPGSV 3 1 11 03 03 111 00 04 15 270 00 06 01 010 00 13 06 292 00 74 SGPGSV 3 2 11 14 25 170 00 16 57 208 39 18 67 296 40 19 40 246 00 74 SGPGSV 3 3 11 22 42 067
7. lt LF gt GLGNS 014035 00 5 1 0 23 67 lt CR gt lt LF gt 1 Message ID SGNS 2 UTC of position fix 3 Latitude 4 Direction of latitude N North S South 5 Longitude 6 Direction of longitude E East W West 7 Mode indicator Variable character field with one character for each supported constellation First character is for GPS Second character is for GLONASS Subsequent characters will be added for new constellation Each character will be one of the following N No fix Satellite system not used in position fix or fix not valid A Autonomous Satellite system used in non differential mode in position fix D Differential including all OmniSTAR services Satellite system used in differential mode in position fix P Precise Satellite system used in precision mode Precision mode is defined as no deliberate degradation such as Selective Availability and higher resolution code P code is used to compute position fix R Real Time Kinematic Satellite system used in RTK mode with fixed integers F Float RTK Satellite system used in real time kinematic mode with floating integers E Estimated dead reckoning Mode M Manual Input Mode S Simulator Mode 8 Number of SVs in use range 00 99 9 HDOP calculated using all the satellites GPS GLONASS and any future satellites used in computing the solution reported in each GNS sentence 10 Orthometric height in meters MSL reference 11 Geoida
8. 10 ms Inserts a delay before asserting Fix Quality OK This is the period that the TW5340 waits after detection of a good fix before outputting a 1PPS qualification signal The TW5340 uses this period to ensure that the TW5300 has time to average out the satellite clocks and provide a stable 1PPS output Fix Quality Flywheel default 10ms On loss of Fix the Fix quality output flywheels for a period set by this parameter Fix Quality PDOP Threshold default 12 The Dilution of precision DOP required for Fix Quality OK 21 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual DOP Rating Description Value This is the highest possible confidence level to be used for 1 Ideal applications demanding the highest possible precision at all times At this confidence level positional measurements are considered 1 2 Excellent an aoe accurate enough to meet all but the most sensitive applications Represents a level that marks the minimum appropriate for 2 5 Good making business decisions Positional measurements could be used to make reliable in route navigation suggestions to the user Positional measurements could be used for calculations but the 5 10 Moderate fix quality could still be improved A more open view of the sky is recommended Represents a low confidence level Positional measurements 10 20 Fair should be discarded or used only to indicate a very rough estimate of the current l
9. 42 24 14 311 43 27 05 244 00 4D Some GPS receivers may emit more than 12 quadruples more than three GPGSV sentences even though NMEA 0813 doesn t allow this The extras might be WAAS satellites for example Receivers may also report quads for satellites they aren t tracking in which case the SNR field will be null 2014 2015 Tallysman Wireless Inc Confidential 35 TW5340 User Manual VTG VTG Track made good and Ground speed Field Track Degrees T True relative to true North Track Degrees M Magnetic Speed Knots N Knots Speed Kilometers per Hour over ground K Kilometers per Hour FAA mode indicator NMEA 2 3 and later Checksum GLL Geographic Position Latitude Longitude Field Latitude N or S North or South Longitude E or W East or West Universal Time Coordinated UTC Status A Data Valid V Data Invalid FAA mode indicator NMEA 2 3 and later Checksum 2014 2015 Tallysman Wireless Inc Confidential 36 TW5340 User Manual GNGNS Outputs GPS and Glonass information in the same message list GNSS capable receivers will also output this message with the GP and or GL talker ID when using more than one constellation for the position fix An example of the GNS message output from a GNSS capable receiver is SGNGNS 014035 00 4332 69262 S 17235 48549 E RR 13 0 9 25 63 11 24 70 lt CR gt lt LF gt GPGNS 014035 00 8 1 0 23 76 lt CR gt
10. N IS IMD OELLLELLAL ILL Figure 3 Wire Color Signal Comments Pin Brown Power 12V 5V or 3 3V depending on model 8 Brown White Gnd OV 7 Blue White RX into the TW5340 RS232 level 6V 5 CMOS 3 3V Orange TX out of the TW5340 RS232 level 6 6V 6 CMOS 3 3V Green White Differential 1PPS output 1PPS_B 1 0 to 2 0V levels Green Differential 1PPS output 1PPS_A 2 0 to 2 0V levels Orange White Wake up Input Wake Up input Low 3 not supported on Rev 1_0 release Blue Fix Quality 1PPS Qualification Continuous mode 0 to 3 3V 4 Standby status Table 2 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Note 1 TW5340 Hardware has been changed on Rev 3 to provide better noise immunity of the 1PPS outputs The following pin changes were made 1PPS B was pin 3 amp is now pin 1 1PPS A was pin 4 amp is now pin 2 Wake up input was pin 1 amp is now 3 Fix Quality Standby status was pin 2 amp is now pin 4 Note 2 There is no change in the Test Adaptor cable 27 0045 0 6 1 TWS5340 Installation For best results the TW5340 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 6 2 Testing Tallysman TW5340 DB9 Test adaptor part 27 0045 1 connects to the RJ45 connector on the TW5430 and provides a DB 9 COM port co
11. specified times see section 9 8 The general purpose output pin provides a positive feedback that the device has entered Standby mode When Not In standby the output is pulled high when in standby the output is floating External control The W5340 can enter Standby mode by issuing a SPSTMGOTOSTANDBY command SPSTMGOTOSTANDBY 1 lt sleep time gt 0 lt sleep time gt lt Sleep time gt is the number of seconds to remain in standby mode Note the two sleep times in the command must be identical The TW5340 can be woken from standby state by the wakeup pin otherwise it will wake after the specified sleep time Pin 3 on the TW5340 can be used to wake the device up To exit Standby mode the Wake Up pin must be pulsed low for approximately 1 ms by an open collector output Note If the TW5340 is in Standby mode for greater 30 minutes the ephemeris data may old and have to be re acquired before a GNSS position can be resolved resulting in a cold start of approximately 50 to 90 seconds As a rule of thumb the TW5340 should be on for 30 seconds every 30 minutes to guarantee a hot start of less than 10seconds Note For applications that need to conserve power by waking up quickly from standby mode and getting a fix as quickly as possible it is recommended that both GPS GLONASS constellations are enabled Initialize GPS time Acquisition of a position fix can be sped up by initializing the TW5430 with the GPS time The followi
12. PS positioning by predicting satellite ephemeris data based on previous observations this results in extremely fast Time To First Fix The TW5340 supports 3 modes of operation Navigation Standby and Low Current expert mode parameters only A hardware interface is provided for external application to control the Standby mode this is especially useful in applications that require low current drain The TW5340 outputs standard NMEA 0183 output with navigation updates rates up to 10Hz are supported Three 3 messages lists can be output each with different output rates The TW5340 is available with RS232 and CMOS interfaces and input voltage options of 3 3V 5 0V and 12V A standard one pulse per second 1PPS output is available as a single ended output or as a differential output at RS422 levels The 1PPS can be configured to be synchronized to UTC GPS or GLONASS reference time Tallysman Windows based TW5340 Configurator application provides for simple configuration of TW5340 parameters such as tracking Standby mode operation 1 PPS timing constellations SBAS etc 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Figure 1 TW5340 The TW5340 is housed in an industrial grade weatherproof IP67 enclosure for 19mm diameter 4 thru hole mount or mast mount installations It is available with low profile radome for use in tracking applications and with a conical radome for timing appl
13. SBAS 2 Parameter Longitude See Table 5 column 5 27 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual SBAS 2 Parameter Service See Table 5 column 1 9 6 TRACKING 2 D Fix default off Enables a two dimensional GPS position fix that includes only horizontal coordinates no GPS elevation It requires a minimum of three visible satellites Walking mode default off The receiver engine uses different filters in walking mode i e does not include velocity in position calculations Stop Detection default on The receiver engine adjusts filters when a stop condition is detected This feature should be disabled when doing wander testing High Dynamics default off The receiver engine uses different filters for high acceleration applications Must be enabled when the fix rate is gt 5Hz Acquisition Mask Angle degrees The elevation angle of a GNSS satellite below which data will be ignored when acquiring a fix A lower mask angle may lead to faster acquisition Positioning Mask Angle The elevation angle of a GNSS satellite below which data will be ignored once a fix has been acquired Once a fix has been acquired the mask angle can be increased so that only high satellites are tracked By setting this parameter to a value less than the acquisition mask angle the satellite will always be used in a fix once it is acquired Having larger values helps reduce multipa
14. TW5340 can be configured to use satellite corrections transmitted by SBAS satellites to provide greater positioning accuracy There are three compatible SBAS systems which are integrated to provide a seamless worldwide navigation system Configure the SBAS satellite ID closest to your Location Table The default satellite ID is 133 Suitable for longitudes of those of the Eastern US Service Satellite Name NMEA Satellite ID Location PRN longitude WAAS Inmarsat 4 F3 46 133 98 W WAAS Galaxy 15 48 135 133 W WAAS Anik F1R 51 138 107 32 W EGNOS Inmarsat 3 F2 33 120 15 5 W EGNOS Inmarsat 4 F2 39 126 250 EGNOS Inmarsat 3 F1 44 131 64 50 MSAS MTSAT 1R 42 129 1400 E MSAS MTSAT 2 50 137 1450 E Table 5 The TW5340 configurator supports the addition of two future SBAS satellite ID s 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 9 TW5340 Configuration Tallysman provides downloadable software package part 45 0030 0 which includes a Windows based Configurator for reading and writing of operating parameters and a user manual TW5340 Configurator File Program Help Interface General Messages Constellation Tracking 1PPS Standby NMEA Baudrate 115200 Figure 10 Connect the PC to the TW5340 using the Test Adaptor 27 0045 1 Set the TW5340 Configurator to the COM port speed of the TW5340 115300 b
15. atus of the TW5340 Once the 1PPS status is detected as good a Fix Quality Start Delay can be inserted before the 1PPS qualification signal is output to ensure that the TW5340 has time to average out the satellite clocks and provide a stable 1PPS output On loss of 1PPS qualification status the 1PPS qualification output is maintained for the Fix Quality Flywheel time see section 9 3 1 PPS Qualification status gS a eee A Bee ee l l 1PPS Qualification output 2 0 V oV te gt 1PPS 1PPS Qual Start delay Qual stop delay Figure 9 6 5 Wake Up Input The Wakeup input is pulled high by the TW5340 It must be left in this state to enter standby mode When in standby the wakeup input must be pulled to ground to cause the TW5340 to exit Standby mode and return to Navigation mode 7 Operating Modes The TW5340 has three operating modes 7 1 Navigation Mode The TW5340 uses the acquisition engine continually resulting in the shortest time to first fix It searches all possible satellites until the almanac is completely downloaded the receiver then switches to the tracking engine to lower power consumption 15 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 7 2 Standby Mode Standby mode stops the navigation operation and all supply inputs are powered down and power drain is reduced to approx 200 uA Standby mode can be configured to periodically enter and exit standby mode for
16. aud is default Select Program Read to read the parameters in the TW5300 Note It is recommended that the default parameters are saved so that you can always retrieve and Write them back if required To write a new set of parameters to the TW5340 select Program Write The configuration file can be save by selecting File Save Note Most configuration parameters changes do not take effect until the TW5340 is reset e power cycled The configurator provides configuration of the general parameters of the TW5340 Contact Tallysman Wireless to discuss specific parameters that may not be listed 9 1 GENERAL Setting new default parameters If you are operating with STANDBY MODE enabled it is recommended that you write your parameters to protected flash using the TW5430 configurator Select Program Create Custom firmware with new default configuration 19 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Create Custom Firmware E This will create a custom firmware file bin that can be loaded onto the TW5340 The newly created firmware will have default settings that you currently have loaded This is only required if Enable Periodic Standby is enabled Input Official Firmware Build Version 1 3 Mar 3 2015 tw5340_1003_RELEASE_swn2647 bin Output Custom Firmware Filename C Users david Desktop myfirmware bin Eos Cancel Create Firmware
17. e list 3 used For gt 5Hz fix rate operation this parameter should be set to zero GLONASS satellite Format default ID is based on slot Selects satellite ID based on frequency or slot as reported in almanac and ephemeris data NMEA output The TW5340 will output messages that are specified in up to 3 lists Each of the message lists can be output at a different rates 24 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Message List 1 rate Sets message list 1 output rate The rate is specified as the number of fixes between message output Message List 2 rate Sets message list 2 output rate There is No Message List 3 rate Messages from list 3 are always output at the fix rate NMEA Message List 1 The basic output message list is shown in Figure 13 Additional outputs are available in expert mode contact Tallysman for details List 1 List 2 List 3 Y GGA GGA GGA GLL GLL O Git C ans C GNS O ens Y GSA C esa GSA C esT GST GST Teseoll Message Lists v GSV C sv Figure 13 Message list 1 is the standard message list Use message list 1 if the NMEA multiple output rate feature is not required NMEA Message List 2 Use to output messages at a different rate For example GSV and GSA can be output at a much lower rate than RMC or GGA NMEA Message List 3 Me
18. em for List 3 If more NMEA sentence outputs are required then set the Message List 1 Rate option to 10 so the selected sentences in List 1 are output at most once per second 4 If fix rate is gt 5Hz a In the Tracking tab check High Dynamics This enables a higher DSP sample rate 26 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 9 5 CONSTELLATIONS Enable GPS Constellation and fix Enables GPS constellation Note for GNS messages the talker ID is GP unless GLONASS is also selected in which case the talker ID will be GN Enable GLONASS Constellation and Fix Enables GLONASS constellation Note for GNS messages the talker ID is GL unless GPS is also selected in which case the talker ID will be GN Enable SBAS WAAS When set and if data is currently received from an SBAS satellite then the TW5340 includes the SBAS corrections in the calculated position SBAS Auto Search default ON The TW5340 will automatically search for an appropriate satellite in view SBAS PRN Set the SBAS satellite number to track SBAS 1 Parameter PRN Two additional SBAS satellites can be added to the SBAS search list Enter PRN Longitude and Service for each SBAS satellite SBAS 1 Parameter Longitude See Table 5 column 5 SBAS 1 Parameter Service See Table 5 column 1 SBAS 2 Parameter PRN See Table 5 column 4
19. hecksum A status of V means the GPS has a valid fix that is below an internal quality threshold e g because the dilution of precision is too high or an elevation mask test failed 32 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual GGA Global Positioning System Fix Data Time Position and fix related data for a GPS receiver Field Universal Time Coordinated UTC Latitude Direction of latitude N or S North or South Longitude Direction of Longitude E or W East or West GPS Quality Indicator O fix not available 1 GPS fix 2 Differential GPS fix values above 2 are 2 3 features 3 PPS fix 4 Real Time Kinematic 5 Float RTK 6 estimated dead reckoning 7 Manual input mode 8 Simulation mode Number of satellites in view 00 12 Horizontal Dilution of precision meters Antenna Altitude above below mean sea level geoid in meters Units of antenna altitude meters Geoidal separation the difference between the WGS 84 earth ellipsoid and mean sea level geoid means mean sea level below ellipsoid Units of geoidal separation meters Age of differential GPS data time in seconds since last SC104 type 1 or 9 update null field when DGPS is not used Differential reference station ID 0000 1023 Checksum 33 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual GSA GPS DOP and active satellites Field Selection mode
20. ications Figure 2 TW5340 Features e Standalone Integrated GPS GLONASS Receiver Antenna e 32 channel simultaneous operation e High performance tracking 162dBm e Fast time to first fix 35mS Accutenna Dual feed antenna high multipath rejection SBAS Capable 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual e Low noise LNA and SAW band pass filter e NMEA 0183 output up to 3 lists Differential 1PPS output 1PPS Qualification e Configuration information saved across power cycles Waterproof enclosure IP67 e Standby low current mode e RoHS compliant 2 Variants The TW534X is offered in the following variants PRODUCT SIGNALS 1PPS_A 1PPS_B Fix Qual TW5340 RS232 3 3V 5V 12V Z TX RS232 RX RS232 RS422 RS422 Standby Wake Up 1PPS_A 1PPS_B Fix Qual TW5340 CMOS 3 3V 5V Y TX CMOS RX CMOS RS422 RS422 Standby Wake up Table 1 2 1 Ordering Information Part Numbering 33 5340 X YY GPS GLONASS Smart Antenna 33 5341 X YY Non magnetic GPS GLONASS Smart Antenna 27 0045 1 TW5340 Test Adaptor Where X interface voltage O RS232 12V 1 RS232 5V 2 CMOS 5V 3 CMOS 3 3V 4 N A 5 RS232 3 3V YY Radome 00 grey conical 10 grey low profile 01 white conical 11 white low profile 3 GNSS Systems Tallysman TW5340 family of GNSS Receiver Antennas are multi GNSS receivers that rece
21. ive and track GPS and GLONASS signals simultaneously 3 1 GPS The US Global Position System GPS uses L1C A signals at 1575 42 MHz to determine position 3 2 GLONASS The Russian GLONASS satellite system is an alternative system to the US based Global Positioning System GPS 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 4 NMEA Packet Format The TW5340 serial interface is based on the NMEA 0183 protocol standard The NMEA 0183 protocol starts with a S character followed by a NMEA Talker ID GP indicates Talker ID for the GPS constellation GL indicates Talker ID the GLONASS constellation GN indicates Talker ID for all constellations 5 Software Utilities 5 1 Open Source GPS Software Utilities The following open source GPS utility can be used to display the GPS and GLONASS GGA and GSV messages with Talker ID s GP and GL http www visualgps net VisualGPSView Note GN Talker ID s are not currently supported by this application This VisualGPS application can log data which can subsequently be imported into the following data conversion application for easy display tracking data on Goggle maps http www gpsbabel or 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 6 Hardware Interface The TW5340 is provided with a 5 m cable terminated in a RJ45 connector y N N N JN JN aes N
22. l TW5340 User Manual L ading new Firmware isdans a aa aE a 20 9 23 INTERFACE TAB 0 ts 21 8 3 GENERAL TAB a A desea ERARE 21 9 41 MESSAGES TAB a 23 9 57 CONSTELLATIONS inerenti iena a a a e a aa ucpesecwiaes 27 9 6 TRACKING ii as 28 OE E E i 2 AAEE OEE EA EET EEE 29 9 8 STANDBY TAB E a eS 31 10 NMEA Message Referente unica pi A aaar A DE ea Tii a 32 MCs A A a a aa 32 NGG OEE EEEE E OEE T A E AEE 33 OS A EE 34 US ld aos 35 O 36 A os aa EEEE AAA EE 36 NON SA A A oes ae eee ce EERSTE cae 37 O 38 UE ea 38 WAS dci 39 4 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 1 Introduction The TW5340 GNSS receiver antenna incorporates the ST STA8088 state of the art receiver which provides 32 high sensitivity tracking channels which can be assigned to acquire and track GPS and GLONASS signals simultaneously The TW5340 is designed for use in professional grade applications such as precision timing network synchronization low current battery and vehicle tracking applications The TW5340 family of GNSS receiver antennas employs Tallysman s Accutenna dual feed antenna patch technology which greatly improves rejection of multi path signals across the whole GNSS band resulting in much higher precision than single feed antennas which are typically tuned to a single GNSS frequency The TW5340 supports ST Microelectronics Autonomous A GPS which accelerates G
23. l separation in meters the difference between the earth ellipsoid surface and mean sea level geoid surface defined by the reference datum used in the position solution an mean sea level surface below ellipsoid 12 Age of differential data Null if talker ID is GN additional GNS messages follow with GP and or GL Age of differential data 37 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 13 Reference station ID1 range 0000 4095 Null if talker ID is GN additional GNS messages follow with GP and or GL Reference station ID 14 The checksum data always begins with ZDA ZDA Time amp Date UTC day month year and local time zone Field UTC time hours minutes seconds may have fractional subsecond Day 01 to 31 Month 01 to 12 Year 4 digits Local zone description 00 to 13 hours Local zone minutes description apply same sign as local hours Checksum Example SGPZDA 160012 71 11 03 2004 1 00 7D Usage SPSTMCPU 53 13 0 52 6d Field of CPU usage Clock Source Clock Speed 2014 2015 Tallysman Wireless Inc Confidential 38 TW5340 User Manual WAAS SPSTMSBAS 1 2 133 43 2C Field Status 1 WAAS ON Acquire flag PRN Elevation Azimuth Two SBAS channels can be tracked SPSTMSBASCH 0 133 26 76 Field Channel PRN Elevation Azimuth SPSTMSBASCH 1 0 0 42 Field Channel PRN Elevatio
24. n Azimuth 02014 2015 Tallysman Wireless Inc Confidential 39
25. ng NMEA command can be used SPSTMINITTIME SPSTMINITTIME lt Day gt lt Month gt lt Year gt lt Hour gt lt Minute gt lt Second gt lt cr gt lt lf gt 16 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Parameter Format Description Day dd decimal 2 digits Day of month 01 to 31 Month mm Decimal 2 digits Month 01 to 12 Year YYYY Decimal 4 digits Year 194 Hour HH Decimal 2 digits Hour 00 to 23 Minute MM _ Decimal 2 digits Minute 00 to 59 Second SS Decimal 2 digits Second 00 to 59 Table 4 The following message will be output on the NMEA communications channel SPSTMINITTIMEOK lt cr gt lt If gt If success SPSTMINITTIMEERROR lt cr gt lt lf gt If no success 7 3 Low Power Mode Contact Tallysman Wireless for details on enabling low power mode After the TW5340 has acquired a position fix and ephemeris and almanac data has been obtained the receiver is ready to enter Low Power Mode The TW5340 receiver s adaptive power management algorithm switches off RF hardware resources whenever possible while maintaining a specified performance level During low power operation only the highest satellites are tracked and the GLONASS constellation is switched OFF when not required 17 02014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 8 Satellite Based Augmentation System SBAS The
26. nnection to a PC for testing purposes Figure 4 shows the test system set up connect the adaptor RED wire to the positive supply and the Black wire to Gnd If the TW5340 outputs at RS232 levels the Test Adaptor can be plugged directly into the PC Com Port if the TW5340 outputs at CMOS levels a CMOS to RS232 converter will be required between the Test Adaptor and the PC COM port Baud Rate The default output from the TW5340 is 5 digit resolution GGA GSV and Usage messages at 115 200 baud See section 10 for message format information 10 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Optional CMOS RS232 DB 9 Clear view Converter Tes Adaptor Of Sky 27 0045 1 PC Running VisualGPS Power GND To TW5340 Figure 4 Test Adaptor Pin outs TW5430 DB9 Test Adaptor 27 0045 1 Power Pin 8 Brown Gnd Pin 7 Brown White Pin 5 Gnd TX out Pin 6 Orange Pin 2 RX into PC RX in Pin 5 Blue White Pin 3 TX out of PC Table 3 NMEA Output test Run the VisualGPS application see section 5 1 select the NMEA tab to display message output Set COM Port Select Tools Connect to GPS Figure 5 11 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Satellite Output Test To display GPS GLONASS satellite outputs the TW5340 must be configured to output a GSV and GGA messages default configuration Run the VisualGPS a
27. ocation At this level measurements are inaccurate by as much as 300 gt 20 Poor meters with a 6 meter accurate device 50 DOP x 6 meters and should be discarded Table 6 FIX Rate Sec Defines the time in seconds between fixes E g if a Message list output rate of 10 Hz is required then the Fix Rate per second should be set to 0 1 sec or 1 10 Hz 22 02014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Text Message The user modifiable text message which is output on reset CPU Clock Speed Sets the CPU clock rate to support the required fix rate The lower the speed the less current draw 52Mhz Osc provides the lowest operating power Higher speeds 104 Mhz minimum will be required to support higher fix rates or accurate timing i e 1PPS or NMEA output relative to a fix The Usage message provides information on of CPU usage see section 10 for Usage message format 9 4 MESSAGES TAB SBAS Satellite on GSV Message The SBAS satellite information is output in a GSV message NMEA 3 01 Mode field on RMC VTG and GLL messages Setting this option will enable a mode field to be appended to the RMC VTG and GLL sentences as required by the NMEA 3 01 specification See the mode indicator in the GNGNS NMEA message section 10 under GNGNS Start Up header message Outputs device information on reset including version model ESN and user text message
28. onized the 1PPS maintains synchronization accuracy with no GPS reception by fly wheeling for a period The following examples are provided for termination of the 1PPS signals 13 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Balanced Termination Se p l li li l A 2v User Equipment TW5340 RS485 422 B N termination A Single Ended With noise immunity User Equipment Single Ended No noise immunity AorB 2v User TW5340 Equipment N C Figure 8 The balanced driver in the TW5430 is an Intersil 3179E Please check the data sheet for additional information Cable Delays The timing of the 1PPS pulse depends on the length of both antenna and interface cables to account for cable delays add 3ns for each meter of cable Fix Quality APPS Qualification Standby This output has a dual function by default it is a Fix Quality 1PPS qualification output 14 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual If the device is configured to operate in Standby mode the output provides positive feedback that the device has entered Standby mode Fix Quality 1PPS Qualification A 1PPS qualification signal is provided to indicates when the 1PPS output is valid qualification is based on the configured Fix Quality PDOP value see section 9 3 Figure 9 shows the internal 1PPS qualification st
29. pplication see section 5 1 select the Front Panel Status tab to display Figure 6 To read and write the TW5340 configuration parameters the same hardware test configuration is can be used while running the Tallysman Windows based Configurator application on the PC See section 9 for configuration details The SBAS satellite is indicated by its NMEA ID and not the PRN See Table 5 for details 6 3 Power The TW5340 operates from 3 3V 5V and 6to 16 volts Overvoltage and transient protection is provided making it suitable for installation in the harshest of vehicle installations On the RJ45 connector shown in Figure 3 e Connect the BROWN wire on the TW5340 to Positive supply e Connect the BROWN WHITE wire on the TW5340 to Gnd 6 4 1PPS The TW5340 provides a one 1 pulse per second output signal for timing purposes Differential 1PSS outputs are provided at RS422 levels The 1PPS signal can be synchronized to GPS or GLONASS reference times to an accuracy within 50 nanoseconds 12 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual 250 ms 750ms lt p ay __ _ 3V j 1 1PPS_A OV 3V 1PPS_B OV Figure 7 The default pulse width is 250 ms but is configurable from 100 ms to 500 ms Typical jitter is 20ns Signal levels are differential 0 V to 2 03V After obtaining a GPS fix the 1PPS output will be accurately maintained even when tracking only one satellite Once synchr
30. ssage list 3 is reserved for those messages which need to be sent at a high rate 10hz and or require accurate message output timing low jitter If high rate messages or low jitter messages are not required this message list should not be used If you are outputting message list 3 at 10 Hz message list 1 amp 2 should be disabled If additional lists outputs are required the output message rate of list 1 will need to be 25 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual reduced e g if you configure message list 3 to output GGA at 8 Hz then message list 1 can be configure to output once per second by setting the Message List 1 Rate to 8 Note 1 When configuring additional NMEA lists check that the baud rate is high enough to ensure there is enough time to output all messages 10 Hz Operation For 10 Hz operation the following configuration settings are required 1 In the Interface tab set the NMEA Baudrate to at least 115200 The next time the configurator is run be sure to set the COM Port Baudrate in the Program Menu COM Port tab to the same value 2 In the General tab set a Fix Rate sec option to 1 b CPU Clock Speed option to 208 MHz PLL 3 In the Message tab set a Delay from Fix to Start of Output ms option to O b Uncheck all items from List 1 and List 2 c Check just one it
31. th errors 28 2014 2015 Tallysman Wireless Inc Confidential TW5340 User Manual Tracking Threshold SNR This parameter sets the minimum C NO threshold to track a satellite Any GNSS satellite with C NO less than the threshold value is dropped and the engine searches for another satellite with a stronger signal level Increasing the tracking threshold decreases the GNSS sensitivity but helps prevent errors due to multipath The value must be in the range 10 to 40 The default is 10 Positioning Threshold SNR A satellite must have a signal strength above this threshold to be included in a fix calculation The default is 15 which helps reduce multi path errors Default 2D DOPS A low DOP value represents a better positional precision due to the wider angular separation between the satellites used to calculate a unit s position These are the maximum allowable values for calculating a 2D fix Default 3D DOPS These are the maximum allowable values for calculating a 3D fix Startup 2D DOPS Set these values the same as the default 2D DOPS Startup 3D DOP Set these values the same as the default 3D DOPS 9 7 1PPS TAB 1PPS Enable 1PPS is output when set Invert 1PPS Polarity The polarity of the 1PPS output is inverted 1 PPS Hold Position The configured Hold Position is used in Timing application as the current position 29 2014 2015 Tallysman Wireless Inc Confidential
32. tion oocooonocnnncncnnnononnnnnnnnnnnnnonennnnnnnnnnnnnnnnnonnnnnnnnnnnnannnnnnnnnnnnnnnnns 7 Bi MONSTER A LEA AA a a hole A 7 Bids LG PSs tte Ret ae ici o Rue Lt etek 7 A O A raa etia eanta ari 7 A gt NMEA Packet POMO 8 A A EEE ERE a TETE AE 8 5 1 Open Source GPS Software UtilitiesS ccononnononconononononononncnoncnnnoncnnranononoos 8 6 Hardware Interface socialista dadas 9 6 1 TW5340 Installa ti D snno e a e a a E a N a aR a EAE 10 6 2 A A oe Re ea etal al eto eee 10 Test Adaptor Pin OUtS irises Aaen aa E a Na a a 11 NMEA Output teSt ooccnnncncccnconnoconnnnnnnncnonononnnnnnnnnnnnnononncnnnnonnnrnnnnnannnnnonnnnnnnnncanennnnnn 11 Satellite Output Testi tii atacaba 12 6 3 ROW A Na 12 Gem SP PS tests tere O 12 Cable Delays netii a a A tdo 14 Fix Quality 1PPS Qualification Standby oococcooonccooancnonanononnnononanononononananonnanonos 14 6 5 Wake Up putitas a AS E a a i a sd 15 7 Operating MOdeS n se na an a Moke dite ibuevss 15 LLE Navigation Mode a as e a eee 15 12 Stand MO ii A AA EEA aN 16 Initialize GPS ME a ala 16 La KOW ROWER Modesto dia a 17 8 Satellite Based Augmentation System SBAS ccnoocccccnonoccccnononcnoncnonanonccnnannnnnonnnnnos 18 9 gt 1W5340 ConfiguratiON casses A is 19 9 1 TENERLO ia taa 19 Setting new default parameters oooooococccccncnononononnnnnnnnnnonnnnononnnnnnnnonnnnnnonnnnnnnnnnnnnannnos 19 3 2014 2015 Tallysman Wireless Inc Confidentia
Download Pdf Manuals
Related Search