Related Manuals for Tallysman TW5340
Summary of Contents for Tallysman TW5340
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Page 1: User Manual
TW5340 Integrated GPS/ GLONASS Receiver/Antenna User Manual Visit us on the web: www.tallysman.com Document # 61-0009-0... - Page 2 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.
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Page 3: Table Of Contents
Standby Mode ....................16 Initialize GPS time ..................... 16 Low Power Mode ....................17 Satellite Based Augmentation System (SBAS) ............18 TW5340 Configuration ....................19 GENERAL ......................19 Setting new default parameters ................19 ©2014 -2015 Tallysman Wireless, Inc. Confidential... - Page 4 10 NMEA Message Reference ..................32 RMC ........................... 32 GGA ........................... 33 GSA ..........................34 GSV ..........................35 VTG ..........................36 GLL ..........................36 GNGNS ........................37 ZDA ..........................38 Usage ......................... 38 WAAS ........................39 ©2014 -2015 Tallysman Wireless, Inc. Confidential...
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Page 5: Introduction
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. - Page 6 TW5340 User Manual Figure 1 TW5340 The TW5340 is housed in an industrial grade weatherproof IP67 enclosure for 19mm diameter (¾”) 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 applications.
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Page 7: Variants
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 receive and track GPS, and GLONASS, signals simultaneously. The US Global Position System (GPS) uses L1C/A signals at 1575.42 MHz to determine position. -
Page 8: Nmea Packet Format
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 “$” character followed by a NMEA Talker ID. “GP” indicates Talker ID for the GPS constellation “GL”... -
Page 9: Hardware Interface
TW5340 User Manual 6 Hardware Interface The TW5340 is provided with a 5 m cable terminated in a RJ45 connector. Figure 3 Wire Color Signal Comments Pin # Brown Power 12V, 5V or 3.3V depending on model Brown/White Blue/White RX into the TW5340 RS232 level (+/-6V) CMOS 3.3V... -
Page 10: Tw5340 Installation
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. -
Page 11: Test Adaptor Pin Outs
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 ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 12: Satellite Output Test
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 application (see section 5.1), select the Front Panel Status tab to display:... - Page 13 After obtaining 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. The following examples are provided for termination of the 1PPS signals. ©2014 -2015 Tallysman Wireless, Inc. Confidential...
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Page 14: 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 (1PPS Qualification)/Standby This output has a dual function, by default it is a Fix Quality (1PPS qualification) output. ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 15: Wake Up Input
Figure 9 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. -
Page 16: Standby Mode
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. -
Page 17: Low Power Mode
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. -
Page 18: Satellite Based Augmentation System (Sbas)
TW5340 User Manual 8 Satellite Based Augmentation System (SBAS) The 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. -
Page 19: Tw5340 Configuration
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 baud is default). Select Program/Read to read the parameters in the TW5300. -
Page 20: Loading New Firmware
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 Figure 12 To load Custom firmware using new default parameters select “Use Custom Firmware”... -
Page 21: Interface Tab
TW5340 User Manual 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. GENERAL TAB Enable watchdog: Enable to set the internal watchdog. - Page 22 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). ©2014 -2015 Tallysman Wireless, Inc. Confidential...
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Page 23: Messages Tab
Outputs device information on reset, including version, model, ESN, and user text message. 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. - Page 24 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. ©2014 -2015 Tallysman Wireless, Inc. Confidential...
- Page 25 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. Figure 13 Message list 1 is the standard message list. Use message list 1 if the NMEA multiple output rate feature is not required.
- Page 26 10 , so the selected sentences in List #1 are output at most once per second. [4] If fix rate is > 5Hz. [a] In the “Tracking” tab check “High Dynamics”. This enables a higher DSP sample rate. ©2014 -2015 Tallysman Wireless, Inc. Confidential...
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Page 27: Constellations
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. -
Page 28: Tracking
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 multipath errors. ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 29: Pps 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. ©2014 -2015 Tallysman Wireless, Inc. Confidential... - Page 30 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. ©2014 -2015 Tallysman Wireless, Inc. Confidential...
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Page 31: Standby Tab
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. ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 32: Nmea Message Reference
Checksum 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. ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 33: Gga
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 ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 34: Gsa
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... -
Page 35: Gsv
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... -
Page 36: Vtg
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... -
Page 37: Gngns
(geoid) surface defined by the reference datum used in the position solution “-” = 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 ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 38: Zda
Local zone description, 00 to +- 13 hours Local zone minutes description, apply same sign as local hours Checksum Example: $GPZDA,160012.71,11,03,2004,-1,00*7D Usage $PSTMCPU, 53.13,0,52*6d Field : % of CPU usage Clock Source Clock Speed ©2014 -2015 Tallysman Wireless, Inc. Confidential... -
Page 39: Waas
TW5340 User Manual WAAS $PSTMSBAS,1,2,133,,,43*2C Field: Status ( 1= WAAS ON) Acquire flag Elevation Azimuth Two SBAS channels can be tracked: $PSTMSBASCH,0,133,,,26*76 Field: Channel # Elevation Azimuth $PSTMSBASCH,1,0,0,,,,*42 Field : Channel # Elevation Azimuth ©2014 -2015 Tallysman Wireless, Inc. Confidential...