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Telit Wireless Solutions SE868-V3 Скачать руководство пользователя страница 36

 
 

 

 

 

SE868-V3 Product User Guide 

 

 

 

 

 

 

 

 

 

 

1VV0301205 r4 – 2016-01-20 

  

 

 

Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. 

 

Page 35 of 76 

Mod. 0805 2015-02 Rev.4

 

 
 

Pin 

Name 

Type  Function 

Power

 

25, 27, 32  VDD18 

P  Connect all pins to 1.8 V supply. See 

Section 9.4 Power Supply.

 

Ground 

1,  4,  7,  9, 

21, 31 

GND 

G  Connect all pins to ground. 

RF Input 

8 

RF_IN 

I 

RF Input. See 

Section 9.8 RF 

Interface

. 

No DC voltage may be applied.

 

Control Input 

13 

ON-OFF 

I 

On/Off. See 

Section 9.4.4 ON-OFF (input) and SYSTEM-ON (output)

 

12 

NRESET 

I 

Reset (active low). See 

Section 9.5 Reset.  

This signal is not necessary for normal 

operation and may be brought out to a test point or left unconnected. 

17 

BOOT-SEL 

I 

Low during normal operation. BOOT-SEL may be driven high to force the module into 

the programmable state. BOOT-SEL is read prior to the host select lines (GPIO 6 & 

7). If not used, this pin should be left floating or (preferably) brought out to a test 

point. See 

Section 8 Flash Upgradability.

 

23 

GPIO6 

I 

GPIO 6 & 7 are read only at powerup and reset events to configure the 1st host serial 

port. See 

Section 9.7.1 Host Port Configuration for 1st Port. 

After configuration, they may be enabled for UART or SPI signal lines, depending on 

the firmware configuration.  

24 

GPIO7 

I 

Output

 

5 

SYSTEM-ON 

O 

Indicates the power state of the module. Also called 

Wakeup

. 

See 

section 9.4.4ON-OFF (input) and SYSTEM-ON (output)

 

26 

GPIO8 

O  External LNA control. Also called 

GNSS_ON

. See 

Section 4.10 Internal LNA. 

 

28 

TM 

O  1 PPS time mark. See 

Section 4.12 1PPS

 

1

st

 Host Communications Port I/O     

See 

Section 9.7.1 Host Port Configuration for 1st Port

 

10 

TX 

I/O  1

st

 Port I/O:   UART-Xmit (TX),   I

2

C- Clock (SCL),   or SPI-Data Out (MISO) 

11 

RX 

I/O  1

st

 Port I/O:   UART-Recv (RX),   I

2

C- Data (SDA),   or SPI-Data In (MOSI) 

23 

GPIO6 

I/O  After configuration, may be used for 1

st

 port: UART-CTS or SPI-SCLK 

24 

GPIO7 

I/O  After configuration, may be used for 1

st

 port: UART-RTS or SPI-nCS 

2

nd

 Host Communications Port I/O   

See

 Section 9.7.2 Host Port Configuration for 2nd Port

 

29 

GPIO1 

I/O  2

nd

 Port I/O:   UART-Recv (RX),   MEMS I

2

C Clock (SCL) 

30 

GPIO0 

I/O  2

nd

 Port I/O:   UART-Xmit (TX),   MEMS I

2

C Data (SDA) 

GPIO 

15 

GPIO4 

I/O  Function depends on Firmware configuration. Leave unconnected. 

18 

GPIO2 

I/O  Function depends on Firmware configuration. Leave unconnected. 

No Connection 

2, 3,  14, 

16, 20, 22  NC 

NC  No Connection. 

19 

NC 

NC  No Connection in SE868-V3. (Was GPIO3 in SE868-V2). 

Reserved 

6 

Reserved 

R  Reserved - Do not connect to any external circuit. (Was GND in SE868-V2). 

 

Table 9-1 SE868-V3 Pin-out Function Table 

Содержание SE868-V3

Страница 1: ...lying on the information therein All referenced brands product names service names and trademarks are the property of their respective owners 00000005981LF 000 EOS Power Buy Now We have 45 000 LP502030 PCM NTC LD A02554 EEMB Lithium Battery Rectangular 3 7V 250mAh Rechargeable in stock now Starting at 0 034 This EEMB part is fully warrantied and traceable 1 855 837 4225 Give us a call Internationa...

Страница 2: ...SE868 V3 Product User Guide 1VV0301205 r4 2016 01 20 ...

Страница 3: ...ct User Guide 1VV0301205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 2 of 76 Mod 0805 2015 02 Rev 4 APPLICABILITY TABLE PRODUCT SE868 V3 ...

Страница 4: ...ies preserve for Telit and its licensors certain exclusive rights for copyrighted material including the exclusive right to copy reproduce in any form distribute and make derivative works of the copyrighted material Accordingly any copyrighted material of Telit and its licensors contained herein or in the Telit products described in this instruction manual may not be copied reproduced distributed ...

Страница 5: ...ranty of fitness for such High Risk Activities Trademarks TELIT and the Stylized T Logo are registered in Trademark Office All other product or service names are the property of their respective owners Third Party Rights The software may include Third Party Right software In this case you agree to comply with all terms and conditions imposed on you in respect of such separate software In addition ...

Страница 6: ...3 Block Diagram 14 2 4 SE868 V3 Module Photo 15 3 Evaluation Kit EVK 16 3 1 SE868 V3 Evaluation Kit 16 4 Product Features 18 4 1 Multi Constellation Navigation 18 4 2 QZSS support 18 4 3 Satellite Based Augmentation System SBAS 18 4 3 1 SBAS Corrections 18 4 3 2 SBAS Ranging 18 4 4 Elevation Mask Angle 18 4 5 Assisted GPS AGPS SiRFInstantFix 19 4 5 1 Client generated Extended Ephemeris CGEE 19 4 5...

Страница 7: ...4 17 5 SiRFaware 24 4 17 6 Hibernate 24 5 Product Compatibility 25 5 1 Upgrading JF2 designs to the SE868 V3 25 5 2 Upgrading SE868 V2 designs to the SE868 V3 26 6 Product Performance 27 6 1 Horizontal Position Accuracy 27 6 2 Time to First Fix 28 6 3 Sensitivity 29 7 Software Interface 30 7 1 NMEA Output Messages 30 7 1 1 Standard Messages 30 7 1 2 Proprietary Output Messages 31 7 2 NMEA Input Co...

Страница 8: ...Power Consumption 39 9 5 Reset 41 9 6 Boot Select 41 9 7 Host I O Port Configuration and Operation 42 9 7 1 Host Port Configuration for 1st Port port 0 42 9 7 2 Host Port Configuration for 2nd Port port 1 43 9 7 3 UART Operation 43 9 7 4 I2 C Operation 44 9 7 5 SPI Operation 45 9 8 RF Interface 46 9 8 1 RF Input 46 9 8 2 External Active Antenna Voltage 46 9 8 3 Burnout Protection 46 9 8 4 Jamming ...

Страница 9: ... 12 Shielding 57 12 Mechanical Drawing 58 13 PCB Footprint 59 14 Product Packaging and Handling 60 14 1 Product Marking and Serialization 60 14 2 Product Packaging and Delivery 61 14 3 Moisture Sensitivity 63 14 4 ESD Sensitivity 64 14 5 Reflow 65 14 6 Assembly Considerations 65 14 7 Washing Considerations 65 14 8 Safety 65 14 9 Disposal 66 15 Environmental Requirements 67 15 1 Operating Environme...

Страница 10: ...ve Device Label 64 Tables Table 2 1 SE868 V3 Product Variants Hardware 13 Table 2 2 SE868 V3 Product Variants Firmware 13 Table 4 1 Internal gain value and external gain range 21 Table 4 2 Power Management Modes 23 Table 6 1 SE868 V3 Horizontal Position Accuracy 27 Table 6 2 SE868 V3 Time To First Fix 28 Table 6 3 SE868 V3 Sensitivity 29 Table 7 1 Default NMEA Output Messages 30 Table 7 2 Availabl...

Страница 11: ...ut where you can buy the Telit modules or for recommendations on accessories and components visit http www telit com To register for product news and announcements or for product questions contact Telit Technical Support Center TTSC Our aim is to make this guide as helpful as possible Keep us informed of your comments and suggestions for improvements Telit appreciates feedback from the users of ou...

Страница 12: ...Rights Reserved Page 11 of 76 Mod 0805 2015 02 Rev 4 1 4 Related Documents SE868 V3 Data Sheet SE868 V3 Evaluation Kit User Guide 1VV0301206 The following documents require a Non disclosure agreement NMEA Reference Guide CS 129435 MA8 SiRFstar One Socket Protocol Interface Control Document CS 129291 DCP15 SiRFstarV OSP Extensions CS 303979 7 ...

Страница 13: ...E868 V2 modules see Product Compatibility section GPS L1 QZSS and either Glonass L1 or BeiDou B1 simultaneous ranging Galileo ready SBAS capable WAAS EGNOS MSAS GAGAN including ranging AGPS support for extended ephemeris using local or server based solutions o Client Generated Extended Ephemeris CGEE o Server Generated Extended Ephemeris SGEE Jamming Rejection Supports passive or active antenna 1P...

Страница 14: ... replaced by the second generation Gen 2 variant in January 2016 SE868 V3 Gen 2 is fully backward compatible and has a reduced power consumption of approximately 35 Feature SE868 V3 Gen 1 SE868 V3 Gen 2 Low power Power Supply Linear Switching P N ID SE868V3AxxxPyyy SE868V3BxxxPyyy Table 2 1 SE868 V3 Product Variants Hardware 2 2 2 Firmware The firmware has two variants Feature High Gain Low Gain I...

Страница 15: ...Guide 1VV0301205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 14 of 76 Mod 0805 2015 02 Rev 4 2 3 Block Diagram Figure 2 1 SE868 V3 Block Diagram ...

Страница 16: ...e 1VV0301205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 15 of 76 Mod 0805 2015 02 Rev 4 2 4 SE868 V3 Module Photo Figure 2 2 SE868 V3 Module Photo ...

Страница 17: ...eserved Page 16 of 76 Mod 0805 2015 02 Rev 4 3 Evaluation Kit EVK 3 1 SE868 V3 Evaluation Kit The Evaluation Kit EVK contains the necessary hardware and software to assist in evaluation and integration of the module in customer applications Note The antenna is included but not visible under the ground plane Figure 3 1 SE868 V3 Evaluation Kit Contents ...

Страница 18: ...ct User Guide 1VV0301205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 17 of 76 Mod 0805 2015 02 Rev 4 Figure 3 2 SE868 V3 Evaluation Kit ...

Страница 19: ...ault but can be enabled via OSP command MID 222 16 4 3 Satellite Based Augmentation System SBAS The receiver is capable of using SBAS satellites both as a source of differential corrections and satellite ranging measurements These systems WAAS EGNOS GAGAN and MSAS use geostationary satellites to transmit regional corrections via a GNSS compatible signal 4 3 1 SBAS Corrections The SBAS satellites t...

Страница 20: ...out EE data CGEE is enabled by default 4 5 2 Server generated Extended Ephemeris SGEE Extended ephemeris is computed at the server and saved in a file which can then be downloaded to the receiver s flash memory The server file contains 1 3 7 and 14 days of ephemerides To use SGEE data a file must be transferred using NMEA or OSP commands Please contact Telit support for subscription details 4 6 2 ...

Страница 21: ...g the Mode Control message MID 136 Valid timeout values are in a range from zero which disables dead reckoning to two minutes 4 9 Jamming Rejection Continuous Wave CW Jamming Mitigation Continuous Wave CW jamming mitigation improves performance in a system that is affected by these predictable jamming signals Stable jamming signals generated by your system implementation such as harmonics of digit...

Страница 22: ...mware build Table 4 1 Internal gain value and external gain range 4 11 5 Hz Navigation When this feature is enabled the receiver starts in 1 Hz mode and continues until it achieves an over determined fix with 5 or more satellites It then computes and outputs solutions 5 times per second Each computation uses fewer but more frequent satellite observations In most situations this gives a better resp...

Страница 23: ...rt Configuration and Operation for details Contact Telit support for implementation of this signal 4 14 MEMS Wakeup 2nd Port I2C If the 2nd port is operating as I2 C the module can configure a Kionix KXCJ9 MEMS accelerometer to generate a signal when a threshold is exceeded This signal can be connected to a GPIO external interrupt which will cause the module to wake up from a low power state Use o...

Страница 24: ... To Fix Power cycling RUN HIBERNATE SiRFAware Periodic data collection updating No Fixes Hibernate Only RTC and BBRAM are powered up Table 4 2 Power Management Modes 4 17 1 Full Power Mode This mode has the highest average power consumption but it is the most accurate navigation mode and supports the most dynamic motion scenarios Full Power is required during initial satellite acquisition tracking...

Страница 25: ...cklePower mode yields significant power savings in strong signal conditions 1PPS is not available 4 17 4 Push to Fix This mode provides for even lower power consumption than TricklePower and is intended for applications that require relatively infrequent position reports The position is reported periodically once every 6 12 18 24 seconds or 30 to 86400 seconds in 30 s increments and also when requ...

Страница 26: ...elit support for more information The ON OFF signal for the SE868 V3 is level sensitive High turns the module on low puts the module into HIBERNATE The ON OFF signal on the JF2 is edge sensitive The SE868 V3 adds a new DC power pin For compatibility with the JF2 flash and ROM variants a zero ohm jumper has been added internally so this pin will not need to be powered However we recommend that it b...

Страница 27: ...e on low turns the module off The ON OFF signal on the SE868 V2 is edge sensitive The SE868 V3 can use the BOOT pin to program the device although SiRFLive does not require it The Boot pin was a no connect on the SE868 V2 which used ROM The SE868 V2 uses an internal SPI flash connected to GPIO0 GPIO1 GPIO3 and GPIO4 The SE868 V3 uses internal SQIF memory GPIO3 is not supported and is not brought o...

Страница 28: ...served Page 27 of 76 Mod 0805 2015 02 Rev 4 6 Product Performance For best performance it is recommended that multi constellation navigation be used 6 1 Horizontal Position Accuracy Constellation s CEP m GPS 1 2 GPS Glonass 1 5 GPS BeiDou 2 5 Test Conditions 24 hr Static scenario 130 dBm Full Power mode Table 6 1 SE868 V3 Horizontal Position Accuracy ...

Страница 29: ...served Page 28 of 76 Mod 0805 2015 02 Rev 4 6 2 Time to First Fix Constellations s Start Type Max TTFF s GPS Hot 1 0 Warm Assisted 7 5 Warm 30 Cold 31 Glonass Hot 3 2 Warm 32 6 Cold 53 9 GPS GLO Hot 1 1 Warm 22 8 Cold 27 GPS BeiDou Hot 1 1 Warm 29 7 Cold 32 2 Test Conditions Static scenario 130 dBm Full Power mode Table 6 2 SE868 V3 Time To First Fix ...

Страница 30: ...nstellation s State Minimum Signal Level dBm GPS Acquisition 146 Navigation 161 Tracking 165 GLONASS Acquisition 145 Navigation 158 Tracking 162 BeiDou Acquisition 142 Navigation 150 Tracking 156 GPS GLO Acquisition 146 Navigation 161 Tracking 165 GPS BeiDou Acquisition 146 Navigation 161 Tracking 165 Test conditions Static scenario under ideal lab conditions using a GNSS simulator Table 6 3 SE868...

Страница 31: ...on is NMEA 9600 bps 8 data bits no parity 1 stop bit Two protocols are available for command input and data output NMEA 0183 V3 10 SiRF One Socket Protocol OSP 7 1 NMEA Output Messages Defaults NMEA 0183 1 Hz fix rate Maximum is 5 Hz 7 1 1 Standard Messages Message ID Description Frequency RMC GNSS Recommended minimum navigation data 1 GGA GNSS position fix data 1 GSA GNSS Dilution of Precision DO...

Страница 32: ...rse Over Ground Ground Speed ZDA Time and Date GNS GNSS Fix Data Table 7 2 Available NMEA Output Messages The following Talker IDs are used Talker ID Constellation GA Galileo GB BeiDou GL GLONASS GP GPS GN Solutions using multiple constellations Table 7 3 NMEA Talker IDs 7 1 2 Proprietary Output Messages The receiver can issue several proprietary NMEA output messages PSRF which report additional r...

Страница 33: ...hange output sentences and their rates Use the Query Rate Control PSRF103 command to enable and disable output NMEA messages and set their output rates 7 2 2 Change data rate Use the Set Serial Port PSRF100 command to change the port data rate 7 2 3 Switch to OSP protocol Use the Set Serial Port PSRF100 command to switch to the OSP protocol It may be necessary to change the data rate since OSP can...

Страница 34: ...ion from Telit Communications S p A All Rights Reserved Page 33 of 76 Mod 0805 2015 02 Rev 4 8 Flash Upgradability The firmware stored in the internal Flash memory of the SE868 V3 may be upgraded via the serial port TX RX pads Please refer to the SE868 V3 Evaluation Kit User Guide to update the firmware ...

Страница 35: ...205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 34 of 76 Mod 0805 2015 02 Rev 4 9 Electrical Interface 9 1 Module Pin out Figure 9 1 SE868 V3 Pin out Diagram ...

Страница 36: ...guration they may be enabled for UART or SPI signal lines depending on the firmware configuration 24 GPIO7 I Output 5 SYSTEM ON O Indicates the power state of the module Also called Wakeup See section 9 4 4ON OFF input and SYSTEM ON output 26 GPIO8 O External LNA control Also called GNSS_ON See Section 4 10 Internal LNA 28 TM O 1 PPS time mark See Section 4 12 1PPS 1st Host Communications Port I O...

Страница 37: ...VDD 3 6 V RPU Internal pull up resistor equivalent 50 86 157 kΩ RPD Internal pull down resistor equivalent 51 91 180 kΩ LI Input leakage at VI 1 8 V or 0 V 10 10 µA LO Tristate output leakage at VO 1 8 V or 0 V 10 10 µA CI Input capacitance digital output 8 pF Table 9 2 DC Characteristics 9 3 Absolute Maximum Ratings Parameter Pins Max Rating Units RF Input Voltage All RF inputs 1 5 V RF Input Pow...

Страница 38: ...ace the module into the HIBERNATE state then remove power To prevent improper startup keep the power removed for approximately 10 seconds to reliably clear the SRAM contents The module monitors the 1 8 volt supply and issues an internal hardware reset if the supply drops below 1 7 volts This reset protects the memory from accidental writes during a power down condition The reset forces the module ...

Страница 39: ...o transition out of a commanded hibernate state The module will transition to the RESET state when external reset nRESET is pulled low or upon internal reset e g supply voltage out of spec The external nRESET signal takes precedence over the state of the ON OFF signal SYSTEM ON will be logic low While in the ON state there are three substates depending upon the status of the ON OFF pin commands or...

Страница 40: ...ts Acquisition GPS only 72 98 84 111 mW GPS and Glonass 92 117 101 125 mW GPS and BeiDou 94 122 100 130 mW Navigation Tracking GPS Only 51 83 63 91 mW GPS and Glonass 59 87 62 92 94 124 mW GPS and BeiDou 71 111 93 135 mW Low Power Trickle Power GPS only Push to Fix 32 mW GPS and Glonass Push to Fix 42 mW GPS and BeiDou Push to Fix 44 mW Low Power Push To Fix GPS only Push to Fix 27 mW GPS and Glon...

Страница 41: ... State Constellation Sym Typ Max Typ Max Typ Max Units Acquisition GPS only Icc 58 80 mW GPS and Glonass Icc 76 99 77 98 76 95 mW GPS and BeiDou Icc 75 97 mW Navigation Tracking GPS Only Icc 53 82 mW GPS and Glonass Icc 44 70 51 78 70 98 mW GPS and BeiDou Icc 70 98 mW Battery Backup Hibernate IBATT 69 uW Operating temperature 25 C Supply voltages 1 8 VDC nominal Low Power mode 500 ms duty cycle Pe...

Страница 42: ...s pulled low the module will immediately transition into reset mode When the external reset is released the module will go through its normal power up sequence provided the V18 supply is within specifications See section 9 4 4 ON OFF input and SYSTEM ON output Pulling NRESET low at any time forces the module into the reset state irrespective of the ON OFF signal In the reset state the SYSTEM ON si...

Страница 43: ...n of this signal The second host port is configured in the firmware build with one of two options UART for message and command communication I2 C for MEMS wakeup Note SPI is not available because it requires 4 pins The default is I2 C for MEMS wakeup Please contact Telit support for details of port configuration Also see Section 4 14 MEMS Wakeup 2nd Port I2C 9 7 1 Host Port Configuration for 1st P...

Страница 44: ...been fully tested and verified If the module is operated in TricklePower mode a baud rate of at least 38 400 is recommended This reduces the time required to empty the output buffer and allows the receiver to drop into the low power state for a longer period of time The minimum recommended baud rate for OSP is 38400 or 115200 if debug data messages are enabled Use the OSP MID 178 70 command to ena...

Страница 45: ...n is Multi master This can be changed to slave mode using an OSP command MID 178 SID 1 Clock rates of 100 and 400 kbps are supported The operation of the I2 C with a master transmit and slave receive resembles a UART operation where both the module and the host can independently freely transmit It is possible to enable the master transmit and slave receive at the same time as the I2 C bus allows f...

Страница 46: ...for 1st Port to specify SPI interface The 2nd port cannot be configured for SPI interface since there are only two pins available SPI is supported in the slave mode The MicroWire format is not supported Maximum speed is 6 8 MHz After configuration the pins are defined below Pin Name SPI Function First Port TX0 SPI Data Out MISO RX0 SPI Data In MOSI GPIO6 SPI Clock SCLK GPIO7 SPI Chip Select CS Sec...

Страница 47: ...performance See Section 4 10 Internal LNA for recommendations and maximum ratings for active antenna or external LNA gain 9 8 2 External Active Antenna Voltage If an active antenna or external LNA is used an external bias T is required to provide voltage to it A DC blocking capacitor is also required to prevent DC voltage from being applied to RF IN pin 9 8 3 Burnout Protection The receiver accept...

Страница 48: ...orization from Telit Communications S p A All Rights Reserved Page 47 of 76 Mod 0805 2015 02 Rev 4 9 8 5 Frequency Plan Signal Frequency MHz TCXO Frequency 26 000 LO Frequency 1588 6 Table 9 11 Frequency Plan 9 9 Local Oscillator Leakage Signal Level LO Leakage 70 dBm typical Table 9 12 LO Leakage ...

Страница 49: ...oduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 48 of 76 Mod 0805 2015 02 Rev 4 10 Reference Designs Note XC6221 is the DC voltage supply regulator Figure 10 1 SE868 V3 Reference Design Passive Antenna ...

Страница 50: ... 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 49 of 76 Mod 0805 2015 02 Rev 4 Note XC6221 is the DC voltage supply regulator Figure 10 2 SE868 V3 Reference Design Active Antenna ...

Страница 51: ... SPI interface RX0 is a standard serial input usually a UART with a default bit rate of 9600 bps 8 data bits 1 stop bit and no parity As is the case with all UART data the idle state is logic one This is a 1 8 volt logic level signal but is tolerant to 3 6 volts Note that it can be configured for I2C or SPI interface TX1 and RX1 can be configured for I2 C interface but not SPI interface SYSTEM ON ...

Страница 52: ...the GPS satellites transmit slightly more power than specified and the signal level typically increases if a satellite has higher elevation angles The GLONASS signal is defined by GLONASS ICD 2008 Version 5 1 This document states that the power level of the received RF signal from GLONASS satellite at the output of a 3dBi linearly polarized antenna is not less than 131dBm for L1 sub band provided ...

Страница 53: ...e of the line of sight signal The reflected signal has a path length that is longer than the line of sight path and can either attenuate the original signal or if received in place of the original signal can add error in determining a solution because the distance to the particular satellite is actually shorter than measured It is this phenomenon that makes GNSS navigation in urban canyons narrow ...

Страница 54: ... ground plane usually 50 mm by 50 mm may give an antenna gain at zenith of 2 dBic An antenna vendor should specify a nominal antenna gain usually at zenith or directly overhead and antenna pattern curves specifying gain as a function of elevation and gain at a fixed elevation as a function of azimuth Pay careful attention to the requirement to meet the required design such as ground plane size and...

Страница 55: ...caded noise figure The simplified formula is Equation 11 1 Cascade Noise Figure Where F is the total system noise figure F1 is the noise figure of the external LNA F2 is the noise figure of the internal LNA and G1 is the gain of the external LNA In the GNSS receiver digital noise is an additive number and cannot be reduced by reducing the System Noise figure Figure 11 1 Cascade Noise Figure exampl...

Страница 56: ...s or RF simulation software A good rule of thumb would be to keep the RF traces as short as possible make sure they are 50 ohm impedance and don t contain any sharp bends Figure 11 2 RF Trace Examples 11 8 PCB stack and Trace Impedance It is important to maintain a 50 Ω impedance on the RF path trace Design software for calculating trace impedance can be found from multiple sources on the internet...

Страница 57: ... not compromised These components are typically specified to operate into 50 Ω impedance which is generally true in band but would not be true out of band If there is extra gain associated with the external filter then a 6 dB Pi or T resistive attenuator is suggested to improve the impedance match between the two components 11 10 Powering an External LNA active antenna An external LNA requires a s...

Страница 58: ...iDou but would still be affected by non CW signals The most common source of interference is digital noise often created by the fast rise and fall times and high clock speeds of modern digital circuitry For example a popular netbook computer uses an Atom processor clocked at 1 6 GHz This is only 25 MHz away from the GNSS signal and depending upon temperature of the SAW filter can be within its pas...

Страница 59: ... 1VV0301205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 58 of 76 Mod 0805 2015 02 Rev 4 12 Mechanical Drawing Figure 12 1 SE868 V3 Mechanical Drawing ...

Страница 60: ...ion forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 59 of 76 Mod 0805 2015 02 Rev 4 13 PCB Footprint Figure 13 1 SE868 V3 PCB Footprint The module shall be mounted on a PCB which complies with V 0 flammability class ...

Страница 61: ...roduct Marking and Serialization The SE868 V3 module label has a 2D Barcode with the module serial number Contact a Telit representative for information on specific module serial numbers Key Description 0 Pin 1 identification 1 Telit logo 2 Product ID 3 Product Variant if any 4 Barcode type 2D datamatrix and text of Telit Serial Number 11 digit base 36 0 to 9 followed by A to Z 5 CE logo 6 Sample ...

Страница 62: ...age 61 of 76 Mod 0805 2015 02 Rev 4 14 2 Product Packaging and Delivery SE868 V3 modules are available in Trays or on Tape and Reel All packaging is ESD protective lined Modules shipped in tray form Each tray is dry packaged and vacuum sealed in a Moisture Barrier Bag MBB with two silica gel packs and then placed in a carton Figure 14 2 Product Packaging Tray ...

Страница 63: ...mmunications S p A All Rights Reserved Page 62 of 76 Mod 0805 2015 02 Rev 4 Modules shipped in Tape and Reel form Each reel is dry packaged and vacuum sealed in a Moisture Barrier Bag MBB with two silica gel packs and a humidity indicator card which is then placed in a carton Figure 14 3 Product Packaging Tape and Reel ...

Страница 64: ...s supplied in trays or tape and reel and is hermetically sealed with desiccant and humidity indicator card The SE868 V3 parts must be placed and reflowed within 168 hours of first opening the hermetic seal provided the factory conditions are less than 30 C and less than 60 R H and the humidity indicator card indicates less than 10 relative humidity If the package has been opened or the humidity in...

Страница 65: ... contains class 1 devices and is classified as Electro Static Discharge Sensitive ESDS Telit recommends two basic principles of protecting ESD devices from damage Handle sensitive components only in an ESD Protected Area EPA under protected and controlled conditions Protect sensitive devices outside the EPA using ESD protective packaging All personnel handling ESDS devices have the responsibility ...

Страница 66: ...dec org Please note that the JEDEC document includes important information in addition to the above figure 14 6 Assembly Considerations Since the module contains piezo electric components it should be placed near the end of the assembly process to minimize mechanical shock to it During board singulation pay careful attention to unwanted vibrations and resonances introduced into the board assembly ...

Страница 67: ...ications S p A All Rights Reserved Page 66 of 76 Mod 0805 2015 02 Rev 4 14 9 Disposal Telit recommends that this product should not be treated as household waste For more detailed information about recycling this product please contact your local waste management authority or the reseller from whom you purchased the product ...

Страница 68: ...b temperature of 35 C whichever is less Altitude 1500 m to 100 000 m Maximum Vehicle Dynamics 600 m s acquisition and navigation 2 G acceleration ITAR Limits 515 m s and altitude greater than 18 000 m Table 15 1 SE868 V3 Operating Environmental Limits 15 2 Storage Environmental Limits Temperature 40 C to 85 C Humidity Up to 95 non condensing or wet bulb temperature of 35 C whichever is less Altitu...

Страница 69: ...mplies with the following Directive 2002 95 EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment RoHS Manufactured in an ISO 9000 2000 accredited facility Manufactured to TS 16949 requirement upon request The SE868 V3 module conforms to the following European Union Directives Low Voltage Directive 2006 95 EEC and product safety test Directive EMC ...

Страница 70: ...uct User Guide 1VV0301205 r4 2016 01 20 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 69 of 76 Mod 0805 2015 02 Rev 4 16 1 CE Declaration of Conformity ...

Страница 71: ...orization from Telit Communications S p A All Rights Reserved Page 70 of 76 Mod 0805 2015 02 Rev 4 16 2 RoHs Compliance The Telit SE868 V3 modules are fully compliant with Directive 2002 95 EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment RoHS ...

Страница 72: ...rs when a receiver begins operation with unknown position time and ephemeris data typically when it is powered up after a period on inactivity Almanac information may be used to identify previously visible satellites and their approximate positions See Restart Cold Start Acquisition Sensitivity The lowest signal level at which a GNSS receiver is able to reliably acquire satellite signals and calcu...

Страница 73: ...ate position velocity and time data GPS is operated by the US Department of Defense Hot Start A hot start occurs when a receiver begins operation with known time position and ephemeris data typically after being sent a restart command See Restart LCC Leadless Chip Carrier A module design without pins In place of the pins are pads of bare gold plated copper that are soldered to the printed circuit ...

Страница 74: ...ropean Union RTC Real Time Clock An electronic device chip that maintains time continuously while powered up SAW Surface Acoustic Wave filter Electromechanical device used in radio frequency applications SAW filters are useful at frequencies up to 3 GHz SBAS Satellite Based Augmentation System A system that uses a network of ground stations and geostationary satellites to provide differential corr...

Страница 75: ...ter An integrated circuit or part thereof which provides a serial communication port for a computer or peripheral device WAAS Wide Area Augmentation System The North American SBAS system developed by the US FAA Federal Aviation Administration Warm Start A warm start occurs when a receiver begins operation with known at least approximately time and position but unknown ephemeris data typically afte...

Страница 76: ...ctrostatic discharges may damage the product itself The system integrator is responsible for the functioning of the final product therefore care must be taken with components external to the module as well as for any project or installation issue Should there be any doubt please refer to the technical documentation and the regulations in force Non antenna modules must be equipped with a proper ant...

Страница 77: ...GPI08 Changed module photo Updated glossary Minor text changes 3 2015 09 04 Clarified GLONASS glossary entry Corrected LNA Noise Figure example Text updates Clarified BOOT pin should be left floating Corrected SYSTEM_ON to ON_OFF in 9 4 4 Corrected active antenna reference design Added package description in 2 1 Changed default for Velocity DR to disabled Added NMEA and OSP command information Add...

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