Novatel OM-20000122 user manual Connect the Gnss Antenna, Connect Power

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Chapter 2

SPAN-CPT Installation

2.2.3Connect the GNSS Antenna

Connect the antenna cable from the connector on the GNSS antenna to the antenna port on the SPAN-CPT. See Typical SPAN-CPT Set Up on page 14.

The SPAN-CPT can supply power for the antenna Low Noise Amplifier (LNA) through the antenna port center conductor. The SPAN-CPT provides +5 VDC ±5% at a maximum of 100 mA.

For best performance, use a high quality coaxial cable. An appropriate coaxial cable is one that matches the impedances of the antenna and receiver (50 ohms) and has a line loss that does not exceed 10.0 dB. If the limit is exceeded, excessive signal degradation may occur and the receiver may not meet performance specifications.

NovAtel offers several coaxial cables to meet your GNSS antenna interconnection requirements, including 5, 15 and 30 m antenna cable with TNC connectors on both ends (NovAtel part numbers GPS-C006, GPS-C016 and GPS-C032).

If your application requires the use of cable longer than 30 m, refer to application note APN-003 RF Equipment Selection and Installation, available at www.novatel.com/support/manuals/.

2.2.4Connect Power

The SPAN-CPT receiver requires an input supply voltage of +9 VDC to +18 VDC. The receiver has an internal power module that does the following:

filters and regulates the supply voltage

protects against over voltage, over current, and high temperature conditions

provides automatic reset circuit protection

Power input pins are located on the multi-purpose I/O connector. Be sure to connect the power with the correct polarity and ensure the power source is within specifications. See Appendix A, Technical Specifications on page 48 for the multi-purpose I/O connector pin out and the power input requirements.

There is always a drop in voltage between the power source and the power port due to cable loss. Improper selection of wire gauge can lead to an unacceptable voltage drop at the SPAN-CPT system. A paired wire run represents a feed and return line. Therefore, a 2 m wire pair represents a total wire path of 4 m. For a SPAN-CPT system operating from a 12 V system, a power cable longer than 2.1 m (7 ft.) should not use a wire diameter smaller than 24 AWG.

ensure internal logic blocks are initialized appropriately and proceed to valid operating states. If the power supply is not monotonic during power on, the accelerometer status in the IMU status may show a failure and the accelerometer measurements in the RAWIMUS log will be zero (see the RAWIMUS log description in the SPAN on OEM6 Family Firmware Reference Manual (OM-20000144)). Power cycling with a monotonic power up clears this error state.The power supply used to power the SPAN-CPT must be monotonic during power on to

If the SPAN-CPT is installed in a vehicle, NovAtel recommends a backup battery be placed between the receiver and its voltage supply to act as a power buffer. When a vehicle engine is started, power can dip or cut out to ancillary equipment causing the receiver and IMU to lose lock and calibration settings.

 

The SPAN-CPT contains a breaker which can be tripped if using an incorrect power supply.

 

Manually power cycle the SPAN-CPT to reset the breaker and reconnect to a properly

 

 

supported power supply.

 

 

 

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SPAN-CPT User Manual Rev 8

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Contents SPAN-CPT Warranty Return instructions Proprietary NoticeTable of Contents Technical Specifications Figures Tables NovAtel Knowledge Base Before Contacting Customer Support Contact InformationIndustry Canada FCC NoticesCE Notice Lightning Protection Installation and Grounding Procedure What is the hazard?Weee Notice Hazard ImpactPrimary and Secondary Lightning Protection Ref # Description Introduction Fundamentals of GNSS+INSRelated Documents and Information System ComponentsConventions SPAN-CPT Installation Required EquipmentManuals SPAN-CPT HardwareHardware Set Up Typical SPAN-CPT Set Up Radio COM2Mount the Antenna Mount the SPAN-CPTConnect Power Connect the Gnss AntennaBattery Isolator Auxiliary Vehicle MainBattery Connect the I/O Strobe SignalsConnect a Computer to the SPAN-CPT Odometer Connection Can BusOdometer Requirements Cable Modification for Kistler WPT Cable Cable Modification for SPAN-CPT CableDefinition of Reference Frames Within Span SPAN-CPT OperationLocal Level Frame Span Body Frame Full Mapping DefinitionsEnclosure Frame Vehicle FrameCommunicating with the SPAN-CPT System Use NovAtel Connect to CommunicateChapter SPAN-CPT Operation Software Configuration Gnss ConfigurationSpan IMU Configuration SPAN-CPT Configuration with NovAtel ConnectReal Time Operation System Start-Up and Alignment Techniques AsciiDefault Kinematic Alignment SetimuorientationManual Alignment Navigation ModeDual Antenna Alignment Azimuth Sources on a Span System Wheel Sensor Update LogicCourse Over Ground Align Azimuth Inertial AzimuthLogs with Azimuth data Solution Parameters Data Collection Logging Restriction Data Collection for Post-ProcessingEnabling L-Band Variable Lever ArmNovAtel Correct with TerraStar Veripos Marine Subscriptions OmniSTARChapter SPAN-CPT Operation Installation SPAN-CPT Dual-AntennaConfiguring Span with Align on SPAN-CPT Power SupplyChapter SPAN-CPT Dual-Antenna SecondaryAlignment on a Stationary Vehicle Aided Static Alignment Alignment on a Moving Vessel Aided Transfer AlignmentUnaided Alignment Span Align Attitude Updates Automatic Alignment Mode Automatic Alignment defaultFirmware Updates Firmware Updates and Model UpgradesNovAtel Firmware and Software Authorization Code Model UpgradesTransferring Firmware Files Updating or Upgrading Using the WinLoad UtilityTypes of Firmware Files Using the WinLoad Utility Open a File to DownloadUpdating using SoftLoad Commands Searching for CardWorking with S-Records Softloadsrec S-RECORDKey Firmware Commands Upgrading Using the Auth CommandUpgrade Procedure Technical Specifications SPAN-CPT Technical SpecificationsHardware Specification for SPAN-CPT KVH IMU Sensor SpecificationsElectrical and Environmental Specifications Power SpecificationsSPAN-CPT Mechanical Drawings SPAN-CPT Side and Perspective ViewSPAN-CPT Top, Front and Bottom View SPAN-CPT Cable SPAN-CPT 60723108 KVH Development Terminated Cable Pin-OutFemale Male Pin Function Wire Pair Wire Color SPAN-CPT 60723107 KVH Standard Un-terminated Cable Pin-OutAccessories and Options Replacement PartsSPAN-CPT System Frequently Asked Questions Appendix COM-20000122 Rev March