u-blox LEA-5 Series Hardware Manual

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u-blox LEA-5 Series Hardware Manual Manual pdf 60 page image

LEA-5, NEO-5, TIM-5H - Hardware Integration ManualGPS.G5-MS5-09027-A2 Released AppendixPage 60 of 68o FixNow Mode: Low power modes are supported with FW 6.00 or ROM 6.00. For migration ofFXN functionalities consult the u-blox 5 Firmware Version 6.00 Release Note [5].o No UTM (Universal Transverse Mercator Projection).o No RTCM protocol for DGPS support.o Raw Data support with LEA-5T only supported with FW 6.00 and above. For more information on u-blox5 firmware version 4.00 or later, refer to:http://www.u-blox.com/customersupport/ublox5_fw.html Check A.2 Software migrationA.2 Software migrationSoftware migration from ANTARIS 4 to a u-blox5 GPS receiver is a straightforward procedure. Nevertheless thereare some differences to be considered with u-blox5 firmware version 5.00. Like its ANTARIS 4 predecessor,u-blox 5 technology supports UBX and NMEA protocol messages. Backward compatibility has been maintainedas far as possible. New messages have been introduced for new functions. Only minor differences have to beexpected in the UBX-NAV and UBX-AID classes of the UBX protocol and for the standard NMEA messages suchas GGA, GLL, GSA, GSV, RMC, VTG and ZDA.ANTARIS 4 u-blox5 RemarksUBX-CFG-NAV2 UBX-CFG-NAV5 UBX-CFG-NAV2 has been replaced by UBX-CFG-NAV5. The new message hasadditional features.The default dynamic platform is “Portable”. This platform is rather genericand allows the receiver to be operated in a wide dynamic range coveringpedestrians, cars as well as commercial aircrafts. Automotive applicationssuch as first-mount navigation systems may better utilize the “Automotive”platform, which is better geared to the dynamics of land vehicles but is onlyof limited use in airborne and high-dynamics environments.UBX-CFG-NAV5 does not support following features:Almanac NavigationNavigation Input filtersUBX-CFG-NAV5 has a message length of 36 Bytes (40 Bytes for UBX-CFG-NAV2)UBX-CFG-NAV5 FixMode is set by default to “Auto 3D/2D” as for ANTARIS4.Check the u-blox 5 Receiver Description including Protocol Specification [4] ifthis mode needs to be changed.UBX-CFG-MSG UBX-CFG-MSG No support for multiple configurations in one UBX-CFG-MSG commandUBX-CFG-RXM N/A Contrary to ANTARIS 4, u-blox5 does not need selecting GPS acquisitionsensitivity mode (Fast, Normal, High Sens and Auto mode) since theacquisition engine is powerful enough to search all satellite in one go.FixNow mode is not available anymore. Low power modes are planned forQ1/09. Contact your local u-blox support team should you need furtherinformation.PUBX,01 N/A Other UBX or NMEA messages can be used to replace this messageUBX-NAV-POSUTM N/AUBX-CFG-TP UBX-CFG-TP u-blox 5 offers the possibility to activate Timepulse signal without GPS fix.UBX-CFG-ANT UBX-CFG-ANT Antenna Open Circuit Detection: The default setting for LEA-4S and LEA-4Awas “enabled”. With all LEA-5 modules the default setting is “disabled”.Automatic Short Circuit Recovery: With ANTARIS 4 this was “disabled” bydefault. With u-blox 5 the default setting is “enabled”.UBX-CFG-RATE UBX-CFG- RATE Set to 1 with u-blox 5UBX-CFG-TMODE UBX-CFG-TMODE With u-blox 5 FW 6.00 and above it is no longer necessary to configure thenumber of satellites in UBX-CFG-NAV to 1 to enable the timing mode. This isperformed automatically.UBX-MON-HW UBX-MON-HW Message length has changed as the number of pins is different with u-blox5.