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GPS Evaluation Kit EVA1084-A

A Description of the Evaluation Board

for Maestro’s GPS Receiver Modules A1084-A/-B

User’s Manual

Version 1.1

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Summary of Contents for EVA1084

Page 1: ...GPS Evaluation Kit EVA1084 A A Description of the Evaluation Board for Maestro s GPS Receiver Modules A1084 A B User s Manual Version 1 1 ...

Page 2: ...Revision History Rev Date Description 0 1 12 15 08 Initial Draft 0 2 01 19 09 Second Draft 1 0 01 26 09 First release 1 1 02 09 11 New style moved to Maestro mm dd yy ...

Page 3: ...PPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF MAESTRO THIS DOCUMENT MAY PROVIDE LINKS TO OTHER WORLD WIDE WEB SITES OR RESOURCES BECAUSE MAESTRO HAS NO CONTROL OVER SUCH SITES AND RESOURCES MAESTRO SHALL NOT BE RESPONSIBLE FOR THE AVAILABILITY OF SUCH EXTERNAL SITES OR RESOURCES AND DOES NOT ENDORSE AND IS NOT RESPONSIBLE OR LIABLE FOR ANY CONTENT ADVERTISING PRODUCTS OR OTHER M...

Page 4: ...y and Auxiliary Antenna Connector 9 4 2 1 Passive Antenna 10 4 2 2 Active Antenna 10 4 2 3 Hints 10 5 LED s 11 6 Design in Support 12 6 1 Terminal Block 12 6 2 DIP Switch Settings 13 6 3 ICC Jumper 14 7 NMEA Port 14 8 EVA1084 A Firmware and NMEA Sentences 14 9 Board Overview 15 10 Board Schematics 16 11 Related Information 17 11 1 Contact 17 11 2 Related Documents 17 11 3 Related Tools 17 12 List ...

Page 5: ...lly demonstrate that an active GPS antenna connected to the Auxiliary Antenna Input and a passive GPS antenna connected to the Primary Antenna Input will result in outstanding GPS performance The user can switch between the two antenna connectors with the ANT_SW signal provided by the DIP switch A Supercap is used to continue RTC operation and to back up SRAM during power off periods The firmware ...

Page 6: ...he included CD ROM Note that two drivers need to be installed the EVA1084 FTDI driver and the USB serial driver Note During the driver installation process your Windows system will probably notify you that the driver did not pass Windows logo testing with a warning Figure 1 Windows driver installation warning Note After successful driver installation Windows might interpret the data coming over th...

Page 7: ...le click the GPSC exe file The GPS cockpit software starts without additional software installation 5 Now you need to activate the correct port within GPS Cockpit You can do this by selecting COM port connection A detailed description of the GPS Cockpit software is included on the CD ROM In any case the following window will ap pear Figure 3 GPS Cockpit communication window blank Activate Terminal...

Page 8: ... a terminal window to see NMEA sentences by using the NMEA Terminal window button You should then see messages like this Figure 5 GPS Cockpit NMEA terminal with NMEA data Now you can start using all the other windows and features of GPS Cockpit Please refer also to the GPS Cockpit manual and the online help within GPS Cockpit ...

Page 9: ...by Firmware version 3 2 5 and later 4 2 Primary and Auxiliary Antenna Connector The A1084 A supports two antenna inputs The antenna connector Primary Antenna leads to pin 12 of the A1084 A GPS receiver which supports passive and active GPS antennas The antenna connector Auxiliary Antenna leads to pin 9 of the A1084 A GPS receiver which supports active GPS antennas It can be switched between the tw...

Page 10: ...hould not exceed 26 dB cable loss Noise figure 1 5 dB The recommendations apply to the majority of active antennas that can be found in the market Anyhow the quality of the GPS antenna chosen is of paramount im portance to the overall sensitivity of the GPS system 4 2 2 2 On Primary Antenna Connector Passive Antenna Input An active antenna connected to the Primary Antenna connector must not exceed...

Page 11: ...Hibernate Toggle hibernate mode position request during PTF cycle the LED visualizes the ON_OFF pulse LD5 1PPS Timing 1PPS signal at rising edge 1 pulse per second duration 500 ms typ Note The original pulse width provided by the GPS receiver is 1 µs typically see also AppNote 1PPS Pulse Width LD3 RFPWUP RF analog status Status of analog section LED on ON LED off OFF controls power supply to the a...

Page 12: ...Please note VCC power input is not protected against reversed polarity External supply has to be within the range of 3 3 to 3 6 VDC RTC backup Supercap soldered to the board can be used 1 6 1 Terminal Block The terminal block offers direct access to the A1084 A GPS receiver pins Pin 1 2 3 4 5 6 7 8 9 Port nRST reset RFPWUP Status of analog section ON_OFF hibernate mode PTF mode RX0 TX0 1PPS Pulse ...

Page 13: ...pin 12 passive antenna primary antenna not applicable S7 VBAK ON OFF 1 S8 VCC ON OFF Table 3 Switch settings 1 S7 has to be OFF to use an external VBAK supply S7 has to be ON to use the onboard Supercap 2 The BOOT switch can be set to flash Firmware to the A1084 A GPS receiver Switch the BOOTSEL switch to ON press and release the nRST button The A1084 A is now waiting to receive new firmware data ...

Page 14: ...nce measurement device to the ICC jumper The low resistance measurement device should be connected before VCC is switched off 7 NMEA Port Default setting 4800 baud 8 data bits no parity 1 stop bit no flow control Standard NMEA 0183 output on NMEA baud rate selectable Standard USB connectors 8 EVA1084 A Firmware and NMEA Sentences See separate document GPS Firmware for a detailed description of the...

Page 15: ...V1 1 Mar 11 User s Manual Page 15 of 18 9 Board Overview Figure 11 Board overview ...

Page 16: ...V1 1 Mar 11 User s Manual Page 16 of 18 10 Board Schematics Figure 12 EVA1084 A board schematics ...

Page 17: ...ss Solutions Limited Add Unit 3603 09 36 F 118 connuaught Road West HK Main Line 852 28690688 Fax 852 25254701 support gps maestro wireless com www maestro wireless com 11 2 Related Documents GPS Receiver A1084 Maestro GPS Firmware A1080 Maestro GPS AppNote EDLC Backup A1080 Maestro GPS AppNote Backup A1080 Maestro GPS AppNote GeoHelix Antenna A1080 Maestro GPS AppNote Firmware A1080 Maestro GPS A...

Page 18: ...tion window COM2 8 Figure 5 GPS Cockpit NMEA terminal with NMEA data 8 Figure 6 Primary and Auxiliary Antenna Connector 9 Figure 7 EVA1084 A LED s 11 Figure 8 Terminal block picture turned by 90 12 Figure 9 DIP switches 13 Figure 10 ICC jumper 14 Figure 11 Board overview 15 Figure 12 EVA1084 A board schematics 16 13 List of Tables Table 1 LED s function and description 11 Table 2 Terminal block de...

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