Evaluation kit for bmd-34 and bmd-38 series modules (20 pages)
Summary of Contents for Ublox C93-M8E
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C93-M8E Application Board User Guide Abstract This document describes the structure and use of the C93-M8E application board and provides information for evaluating and testing u-blox M8 Untethered Dead Reckoning (UDR) positioning technology. www.u-blox.com UBX-15031067 - R03...
C93-M8E - User Guide Document Information Title C93-M8E Subtitle User Guide Document type User Guide Document number UBX-15031067 Revision and date 12-Dec-2018 Disclosure Restriction Early Production Information This document applies to the following products: Product name Type number ROM/FLASH version...
The C93-M8E is compact, and ideally suited for use in laboratories and vehicles. It can be used directly with a PDA or a notebook PC via its USB interface. Schematics and layouts are available, allowing the C93-M8E to be used as a basis for customer designs.
C93-M8E - User Guide Specifications Parameter Specification 1 micro USB V2.0 Extra connectors connection pins for UART communication, 3.3 V Dimensions 49 x 49 x 20 mm Power Supply 5V via USB or external powered via extra power supply pin 1 (VCC) and common...
Figure 1: Connecting the unit for power supply and communication 3.2 Integrated GNSS antenna The C93-M8E includes an 18 mm patch type GNSS antenna. The PCB design allows for patch antennas of up to 25 mm to be fitted (soldering required).
A micro USB V2.0 compatible port is featured for data communication and power supply. 3.3.2 Pin header The C93-M8E application board includes a 6-pin latching connector from the TE Connectivity AMPMODU MTE series. Mating cable receptacles from this series include part numbers 5-103960- 5 and 5-103957-5.
4.1.1 Mounting the C93-M8E The C93-M8E application board should be firmly attached to the car body so as to avoid any movement or vibration with respect to the car body. The application board should not be attached to any “live” (unsprung) part of the vehicle’s suspension. Often it is enough to use strong double sided tape or Velcro tape glued to the bottom of the C93-M8E casing.
• Signal Attenuation Compensation: For installations where the signals are attenuated due to the C93-M8E placement, the signal attenuation compensation feature can be used to restore normal performance. There are three possible modes: Disabled: no signal attenuation compensation is performed...
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C93-M8E - User Guide Figure 4: Screenshot of u-center showing the INITIALIZING mode in UBX-ESF-STATUS message 4.2.2.2 Fusion Mode Once the initialization phase is achieved, the receiver enters navigation mode and starts to compute combined GNSS/Dead-reckoning fixes and to calibrate the sensor required for computing the fused navigation solution.
C93-M8E - User Guide Figure 6: Screenshot of u-center showing the sensor calibration as CALIBRATED 4.3 Accelerated Initialization and Calibration Procedure This section describes how to perform fast initialization and calibration of the UDR receiver for the purpose of evaluation.
C93-M8E - User Guide Test Drives ☞ Before testing can be done, make sure that the calibration has been completed according to chapter 4. We recommend recording and archiving the data of your test drives. You can enable additional debug messages by clicking the Debug button, and then clicking the Record button (see Figure 7).
C93-M8E - User Guide Board layout Figure 10 shows the C93-M8E board layout. See Table 4 for the application board component list. Figure 10: C93-M8E layout: Top and Bottom UBX-15031067 - R03 Early Production Information Board layout Page 14 of 21...
C93-M8E - User Guide Troubleshooting My application (e.g. u-center) does not receive anything Check whether the blue LED on the application board is blinking. Also make sure that the USB cable is properly connected to the application board and the PC. By default, the application board outputs NMEA protocol on Serial Port 1 at 9600 Bd, or on the USB.
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The C93-M8E does not meet the TTFF specification Make sure the C93-M8E has a good sky view. An obstructed view leads to prolonged startup times. In a well-designed system, the average of the C/No ratio of high elevation satellites should be in the range of 40 dBHz to about 50 dBHz.
C93-M8E - User Guide 10 Common evaluation pitfalls • A parameter may have the same name but a different definition. GNSS receivers may have a similar size, price and power consumption but can still have different functionalities (e.g. no support for passive antennas, different temperature range). Also, the definitions of hot, warm, and cold start times may differ between suppliers.
C93-M8E - User Guide Contact For complete contact information, visit us at www.u-blox.com. u-blox Offices North, Central and South America Headquarters Asia, Australia, Pacific Europe, Middle East, Africa u-blox America, Inc. u-blox Singapore Pte. Ltd. u-blox AG Phone: +1 703 483 3180...
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