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AsteRx-i UAS (PRELIMINARY)

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Note that the connection to the SD-card differs from the recommended circuit in section

2.9.  The UAS board connects the SD-card DAT3 pin to pin#24 of the 30-pin connector of
the AsteRx-i OEM.  This connection is there to make the interface board compatible with
the legacy AsteRx-m receiver.   New designs made for the AsteRx-i OEM should leave the
SD-card DAT3 pin unconnected.

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Содержание AsteRx-i S

Страница 1: ...AsteRx i S and AsteRx i V Product Group Hardware Manual Version 1 0 2 ...

Страница 2: ...anual Version 1 0 2 September 14 2018 Copyright 2000 2018 Septentrio nv sa All rights reserved Septentrio Greenhill Campus Interleuvenlaan 15i 3001 Leuven Belgium http www septentrio com support septentrio com Phone 32 16 300 800 Fax 32 16 221 640 septentrio ...

Страница 3: ... Figure and C N0 10 2 5 I O Connectors 12 2 5 1 30 pin Connector 13 2 5 2 60 pin connector 14 2 6 Event Inputs 16 2 7 General Purpose Output GPx 16 2 8 Standby Mode 16 2 9 SD Memory Card Usage 16 2 10 USB Interface 17 2 11 Ethernet 18 3 SBG ELLIPSE2 MICRO 20 3 1 Dimensions 20 3 2 Environmental 21 3 3 Power Consumption 21 3 4 Connector 21 3 5 Open Ended Cable 21 4 VN 100 RUGGED 23 4 1 Dimensions 23...

Страница 4: ... 28 5 5 Schematics 28 5 6 UAS to IMU Cables 31 DEVELOPMENT KIT 32 5 7 Powering the DevKit 32 5 8 Antenna Connectors 33 5 9 LEDs 34 5 10 COM Ports 34 5 11 PPS Out and Event Inputs 35 5 12 Ethernet 35 5 13 USB Dev 36 5 14 USB Host 36 5 15 REF IN 36 5 16 Buttons 36 5 17 SD Card Socket 36 5 18 Connection with IMU 37 APPENDIX A LED STATUS INDICATORS 38 APPENDIX B EMC CONSIDERATIONS 40 ...

Страница 5: ...uropean Union EU Directive 2002 96 EC on waste electrical and electronic equipment WEEE The purpose of this Directive is the prevention of waste electrical and electronic equipment WEEE and in addition the reuse recycling and other forms of recovery of such wastes so as to reduce the disposal of waste If purchased in the European Union please return the product at the end of its life to the suppli...

Страница 6: ...anied this device Statement 0001 WARNING The power supply provided by Septentrio if any should not be replaced by another If you are using the receiver with your own power supply it must have a double isolated construction and must match the specifications of the provided power supply Statement 0003 WARNING Ultimate disposal of this product should be handled according to all national laws and regu...

Страница 7: ...d equipment designed to protect personnel and equipment from electrostatic discharge Handling Remove static sensitive components and assemblies from their static shielding bags only at static safe workstations a properly grounded table and grounded floor mat and only when you are wearing a grounded wrist strap with a resistor of at least 1 mega ohm in series or other grounding device Avoid having ...

Страница 8: ... GNSS Module All dimensions in millimeters Weight 28 g RF connectors u FL type are mounted on top side of the PCB The 30 and 60 pin Hirose I O connectors are mounted on the bottom side view from above I O connectors on the bottom side Pin 1 Pin 1 ...

Страница 9: ...onsumption The OEM module is powered through pin 1 and pin 2 of the 30 pin connector Power supply voltage must be 3 3V 5 The power consumption depends on the set of GNSS signals enabled with the setSignalTracking command The following table shows the typical power consumption of the OEM module not including the IMU in dual antenna mode for selected sets of signals Signals enabled with setSignalTra...

Страница 10: ... figure NFrx see below 10 dB with 15 dB net gain The receiver noise figure increases as the net gain increases but its contribution to the system noise figure decreases The worse case is for a net gain of 15dB RF nominal input impedance 50 Ohms VSWR ANTA or ANTB 2 5 1 in 1200 1251 MHz and 1560 1610 MHz range 1 The net gain is the total pre amplification of the distribution network in front of the ...

Страница 11: ... 10 1 1015 10 3 14 dB The C N0 in dB Hz of a GNSS signal received at a power P can be computed by C N0 P 10 log10 Tant 290 10NFsys 10 1 228 6 dB where P is the received GNSS signal power including the gain of the antenna passive radiating element in dBW e g 155dBW Tant is the antenna noise temperature in Kelvin Typically Tant 130K for an open sky antenna 228 6 is 10 log10 kB with kB 1 38e 23 J K t...

Страница 12: ...le the drivers driving the input pins Designs not using the 60 pin connector must either keep the input pins in hi Z mode for at least 300 ms after applying power or drive the nRST pin low for at least 300 ms after applying power When not using the IO_EN pin it is recommended not to put the board in standby mode When pull up down resistors are needed use 10 k Unused or reserved pins should be left...

Страница 13: ...ernal logging status indicator Max output current 10 mA output impedance 20 Ohms See Appendix A 29 GND Gnd 0 Ground Pin Name Type Level Description Comment 2 Vin P 3 3V 5 Main power supply input Both Vin pins pin 1 and pin 2 must be tied together 4 GND Gnd 0 Ground 6 USB_D I O USB USB data signal negative D 8 nRST Ctrl PU LVTTL Reset input active negative Receiver resets when driven low 10 RX1 I K...

Страница 14: ... this pin low when ready to receive data 15 TX4 O LVTTL Serial COM 4 transmit line inactive state is high 17 Reserved 19 Reserved 21 Reserved 23 Reserved 25 Reserved 27 Reserved 29 GND Gnd Ground 31 RMII_TXEN O LVTTL LAN PHY transmit enable See section 2 11 33 RMII_TXD1 O LVTTL LAN PHY transmit data 1 See section 2 11 35 RMII_CRS_DV I LVTTL LAN PHY CRS See section 2 11 37 RMII_RXER I LVTTL LAN PHY...

Страница 15: ...round 20 Reserved 22 Reserved 24 Reserved 26 Reserved 28 Reserved 30 GND Gnd Ground 32 RMII_CLK O LVTTL LAN PHY Clock See section 2 11 34 RMII_TXD0 O LVTTL LAN PHY transmit data 0 See section 2 11 36 GND Gnd Ground 38 RMII_RXD0 I LVTTL LAN PHY receive data 0 See section 2 11 40 RMII_RXD1 I LVTTL LAN PHY receive data 1 See section 2 11 42 GND Gnd Ground 44 GP2 O LVTTL General purpose output GP2 in ...

Страница 16: ...mum current of 10mA 2 8 Standby Mode In standby mode all receiver functions are turned off and the power consumption is very low see section 2 3 There are two ways to enter standby mode 1 By driving the nPDN pin low pin 20 of the 30 pin connector The receiver wakes up when the nPDN pin level is high again there is an internal pull up 2 By entering the exePowerMode StandBy user command To wake up t...

Страница 17: ...s of data are lost To avoid data losses it is advised to first unmount the SD card This can be done in two ways 1 By entering the command exeManageDisk DSK1 Unmount before turning off the receiver 2 By driving the button pin pin 25 low for at least 5 seconds before turning off the receiver 2 10 USB Interface The user can configure the USB device interface in either USB 1 1 full speed mode or in US...

Страница 18: ...duplex 10 100 Base T Ethernet communication The Ethernet PHY and magnetics are to be implemented on the host board Connection with the PHY is through the RMII interface available on the 60 pin connector An example of application circuit is given in the next page Two options are shown stand alone magnetics or magnetics integrated in a RJ45 connector ...

Страница 19: ...19 19 AsteRx i OEM GNSS Module 19 Towards OEM module ...

Страница 20: ...20 20 SBG Ellipse2 Micro 20 3 SBG Ellipse2 Micro 3 1 Dimensions All dimensions in mm The IMU reference point is marked by the symbol ...

Страница 21: ... receptacle reference is G125 FS11005L0P The mating connector is Harwin G125 3041096L4 plus contacts The input voltage range VIN pin is from 4 to 15V 3 5 Open Ended Cable Septentrio s CBL_AxiS_OEM_IMU cable part 215684 can be used to connect the IMU to the AsteRx i S OEM Twisted pairs are used when applicable to prevent cross talk between digital signals The wiring diagram and the wire colors are ...

Страница 22: ...he AsteRx i OEM module which is the default IMU port Conversion from RS 232 to TTL level is needed If using another port than COM3 it must be specified to the firmware with the setIMUInput command The SYNC A pin of the IMU must be connected to the PPSout pin of the AsteRx i OEM ...

Страница 23: ...23 23 VN 100 Rugged 23 4 VN 100 Rugged 4 1 Dimensions All dimensions in inches mm The IMU reference point is marked by the symbol ...

Страница 24: ...o 65 C Storage 40 to 85 C 4 3 Power Consumption The IMU consumes 220mW 4 4 Connector The main connector used on the VN 100 Rugged is a 10 pin Harwin M80 5001042 The mating connector is a Harwin M80 4861005 The input voltage range VCC pin is from 4 5V to 5 5V ...

Страница 25: ...ss talk between digital signals The wiring diagram and the wire colors are indicated below It is recommended to connect the IMU to COM3 of the AsteRx i V OEM COM3 is the default IMU port Conversion from RS 232 to TTL level is needed If using another port than COM3 it must be specified to the firmware with the setIMUInput command The SYNC_IN pin of the IMU must be connected to the PPSout pin of the...

Страница 26: ...ns This interface card is referred to as the UAS board in this chapter This chapter provides information on the UAS board only Refer to chapter 2 for the specifications of the AsteRx i OEM module The version of the UAS board described here is preliminary and subject to change It should not be be used in final designs Contact Septentrio Support for details support septentrio com 1 2 Gnd Shutter PPS...

Страница 27: ... RA Header 1x2 3 3V LVTTL event input Connects to the EventA pin of the AsteRx i OEM through an inverter A high to low transition at the J7 connector corresponds to a low to high transition as seen by the AsteRx i OEM and vice versa This header can for example be connected to the flash port of a camera e g via Hot Shoe or Prontor Compur interface to allow the AsteRx i OEM to time tag the pictures ...

Страница 28: ...circuits see schematics in section 5 5 The UAS board provides the 3V3 supply to the AsteRx i OEM receiver there is no need for a separate 3V3 supply for the receiver The UAS board provides a 5V DC voltage to the VANT pin of the AsteRx i The power consumption of the UAS board is 150 mW not counting the consumption of the AsteRx i OEM 5 3 LEDs The PWR LED is lit if the UAS board is powered and the s...

Страница 29: ... circuit in section 2 9 The UAS board connects the SD card DAT3 pin to pin 24 of the 30 pin connector of the AsteRx i OEM This connection is there to make the interface board compatible with the legacy AsteRx m receiver New designs made for the AsteRx i OEM should leave the SD card DAT3 pin unconnected ...

Страница 30: ...30 30 AsteRx i UAS PRELIMINARY 30 See note above ...

Страница 31: ...g the UAS board to the IMU can be done using one of the following cables supplied by Septentrio CBL_AxiS_UAS_IMU part 215691 to an SBG Ellipse2 Micro CBL_AxiV_UAS_IMU part 215686 to a VN 100 Rugged The cables are split in three to be connected as follows PPS COM PWR ...

Страница 32: ...ing the DevKit from a PC or from a standard phone charger adapter The supported USB voltage range is 4 5V 5 5V 2 Using the POWER connector J203 The supported voltage range is 5 36V It is safe to provide power to both connectors in parallel The DevKit will use the source with the highest voltage Make sure that a jumper is placed on header J200 as shown below Otherwise the DevKit will be powered but...

Страница 33: ...t is recommended to set the multimeter in high ampere setting to keep the voltage drop as low as possible 5 8 Antenna Connectors There is no antenna connector on the DevKit The antennas must be connected directly to the u FL connectors on the GNSS module See section 2 4 for details The DC voltage 5V or 3 3V at the antenna connectors is determined by the position of the jumper on header J204 as sho...

Страница 34: ...RS232 standard RTS CTS lines are supported only on COM2 and COM3 Connection to a PC is done through a null modem cable Alternatively 3 3V TTL signals are available through four 6 pin headers as shown below The pinout is compatible with standard FTDI 6 pin SIL connectors To route a COM port to the 6 pin header instead of the BD9 connector a jumper must be placed on J800 COM1 J801 COM2 J804 COM3 and...

Страница 35: ... are connected to the EventA and EventB pins of the AsteRx i through a buffer The voltage level at the header pins must be between 0 5V and 6V These pins are pulled down by a 100kOhm resistor See section 2 6 for more details 5 12 Ethernet The DevKit supports 10 100 Base T Ethernet It is not possible to power the DevKit through the Ethernet connector EVENTB EVENTA PPSOUT COM1 COM2 COM3 COM4 GND RTS...

Страница 36: ...eceiver Pressing the LOGGING button drives the Button pin of the AsteRx i OEM low This can be used to enabled and disable logging as described in section 2 9 The buttons are also connected to J601 and J602 2 pin headers see above picture Tying the nRST or LOGGING pins of these headers to ground is the same as pressing the respective button 5 17 SD Card Socket The receiver can log files on the micr...

Страница 37: ... 5 18 Connection with IMU Septentrio s open ended IMU cables see sections 3 5 and 4 5 can be used to connect the DevKit to the IMU The following connections are recommended 5V out to IMU PWR PPS out to IMU SYNC COM3 to IMU COM ...

Страница 38: ...ellites for which differential corrections have been provided in the last received differential correction message RTCM or CMR LED behaviour Number of satellites with corrections LED is off No differential correction message received blinks fast and continuously 10 times per second 0 blinks once then pauses 1 2 blinks twice then pauses 3 4 blinks 3 times then pauses 5 6 blinks 4 times then pauses ...

Страница 39: ... activity LED LED Behaviour LOGLED LED is off when the SD card is not present or not mounted LED is on when the SD card is present and mounted Short blinks indicate logging activity During boot i e during the first seconds after powering the receiver the state of the LEDs is not defined ...

Страница 40: ...nditions the C N0 values should reach up to 50 dB Hz for the strong signals on L1 and up to 45 dB Hz on L2 as illustrated below If the maximum C N0 is lower than expected interference and cross talk from nearby electronics is likely and the source of the problem needs to be identified This is where the RF spectrum monitor built in the AsteRx i comes in handy The spectrum monitor can be accessed in...

Страница 41: ...band and slightly degrades the L1 C N0 of some GLONASS satellites Try to keep personal computers and other equipment more than 2 meters away from the antenna while assessing electromagnetic compatibility of the integration RxControl also allows to observe the time domain signal This should look like white Gaussian noise as illustrated below ...

Страница 42: ...d the system frequencies For example peaks at 1200 and 1248 MHz are an indication of an interfering source at 48 MHz as this maps to the 25th and 26th harmonic of a 48 MHz signal This may correspond to the frequency of a microcontroller in the application Integration cross talk can be solved in a number of ways Shift the clock frequency of the interfering signal to avoid the GNSS bands Use shieldi...

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