CW12-TIM GPS receiver module based on our CW25
Contents
1. 2 90 x4 1 575 1 346 40 34 20 039 2 362 125 3 18 x4 i 372 HL 9 46 iT Ts j T bom A i Inches Po mm 227 5 78 021 0 54 Figure 2 Mechanical Drawings Contact us at either of the locations below for questions or ordering information NavSync Ltd Europe Bay 143 Shannon Industrial Estate Shannon Co Clare Ireland Phone 353 61 475 666 E mail sales navsync com North America 2111 Comprehensive Drive Aurora IL 60505 USA Phone 630 236 3026 E mail northamerica navsync com www navsync com2. form factor CW12 TIM GPS RECEIVER SPECIFICATIONS SPECIFICATIONS NOTE Physical Module dimensions 60mm D x 40mm W x 10mm H Supply voltages 3 0 3 6V Operating Storage Temp 40 C to 75 C 55 C to 125 C Humidity 5 to 95 non condensing Max Acceleration Jerk 4g 1gs sustained for less than 5 seconds 1 Datum WGS 84 Default Connector Data Power 10 pin 2 x 5 unshrouded header on 0 050 inches centers RF MMCX subminiature snap on Sensitivity Acquisition Tracking 173dBW 186dBW 143dBm 156dBm Acquisition Stand Alone Outdoor Cold lt 45s Time Warm lt 38s Hot lt 5s Re acquisition lt 0 5s 90 confidence Accuracy Position Outdoor Indoor lt 5m rms lt 50m rms Velocity lt 0 05ms Latency lt 200ms Raw Measurement Accuracy Pseudorange lt 0 3m rms Carrier phase lt 5mm rms Tracking Code and carrier coherent Power 1 fix per second 0 6W typically Interfaces Serial 1 port CMOS levels Multi function I O 1PPS and Frequency Output 2 Status LEDs Protocols NMEA 0183 or Motorola Binary 1pps Timing Output 10nS rms accuracy lt 5nS resolution Pulse Width NMEA 100 uS Motorola Binary 200ms 2 Frequency Output NMEA 10 Hz to 10 MHz Motorola Binary 10 MHz 2 Receiver Type 12 parallel channel x 32 taps up to 32 point FFT Channels taps and FFT can be switched off to minimize power or simulate simpler designs General Processor ARM 966E S on a 0 18 micron process at up to 120 MHz Note 1 T
3. Timing and Navigation Applications Description The CW12 TIM GPS receiver module is an integrated timing module powered by NavSync s CW25 GPS receiver It has been specifically designed for use in synchroni zation and timing applications The CW12 TIM has an on board pro grammable NCO oscillator that outputs a synthesized frequency up to 10 MHz that is steered by the GPS receiver The CW12 TIM has a self survey mode of operation that allows the receiver to enter a position hold mode to allow accurate timing to be continue with only one satellite being tracked The output frequency is highly accu rate and can achieve full PRC MTIE per formance It can also track satellites and provide GPS synchronization in weak signal areas such as indoor applications This re duces the need for high antenna placement In many environments The CW12 TIM receiver module is a 40 x 60 x 10mm package with 10 pin 2 x 5 interface for ease of placement 3V GPS ENGINE Bulletin NS04 DS Revision 05 Date 13 April 2010 GND NAVSYnc Block Diagram CW12 TIM GPS Receiver Features e 3 0 3 6V volt operation e 12 channel simultaneous operation e Fully calibrated to UTC at USNO e 40 x 60 x 10mm form factor e 45 s typical cold start TTFF e 38 s typical warm start TTFF e 5s typical hot start TTFF e lt 0 5 s reacquisition e Position hold for improved accuracy e Antenna current limit e Motorola M12
4. iming Applications typically assume static operation 2 Could be customized a Copyright 2010 Navsync Ltd All Rights Reserved Specifications subject to change without notice CW12 TIM GPS MTIE PERFORMANCE The graph below demonstrates the MTIE performance of the CW25 TIM output frequency relative to a Caesium atomic clock with the CW12 TIM GPS operating with a clear view of the sky HMTIE file p z r Be Symmetricom TimeMonitor Analyzer Ge v a m c l E eo File Edit Setup View Update Help Notes Pasrerssseensasereeseny 5 5 Ko h 2 n se i Q z ke Q i 2 G e 3 q 4 L a b w a N Lond o N g w N pE N E So ry Ii u os N Il Le ay _ TI 1 gt 2 os c o 9 Go a PE N I 2 lt o a us Py o ss jee m m N N 4 2 a amp Go n p w i oy w gt sy So N Lad 3 2 OR n oo he pa 0 4 m Land ye w a es 1 aisles ese dee TETIT j b j M ETSI PRC SS Se ee I solel Jo Observation Window T au MTIE No filter is currently enabled see Measure View Setup on the Setup Menu No filter selected Fo offset 31 04 uHz 3 104E 12 Fo reference 10 000000000000 MHz Fo 9 9999999999690 MHz N 223377 Computi
5. nS 30nS Variable Freq Output x V NMEA 0183 Antenna Current Limiting J J Voltage 3V 3V 3 6V Positional Accuracy 3D 25m 10m On Board Battery v option J T RAIM V v RTCM Input A x Data Output Format NMEA 0183 4800 or NMEA 0183 Motorola Binary 9600 Variable Baud Rate or Motorola Binary 9600 Table Differences between NavSync CW12 TIM and Motorola M12 Check table for list of supported Binary commands Motorola Binary Commands supported by NavSync s CW12 TIM Motorola Binary Command Description Notes Be Almanac Data Output Bd Almanac Status Cb Almanac Data Input Cf Set to defaults C Receiver ID No unique serial or manufacture data Eq ASCII Position Ga Combined Position GPS only Gb Combined Time Gc 1PPS Control Gd Position Control Ge T RAIM Select Message Ha Position Status Data Hn 12 Channel T RAIM Status la Self Test Only FLASH and ROM tested No support for antenna status a Copyright 2010 Navsync Ltd All Rights Reserved Specifications subject to change without notice CW12 TIM Application Notes continued The CW12 TIM offers access to a subset of the CW25 interface pins The following Diagram shows the layout of interface connector and Table 2 gives a signal description for each pin O OOOO 900G Figure 1 Layout of I O connector on the CW12 TIM Pin Name I O Description 1 TXD O NMEA 0183 output from GPS Core Refer to CW25 User Manual for descripti
6. ng phase for long record Computing MTIE for long record i i f z a A The graph below demonstrates the ability of the CW12 TIM GPS to continue to provide a GPS disciplined output frequency with the GPS aerial located completely inside a building the degradation of MTIE performance is due to the effects of signal multi path MTIE Fo 999 0 MHz 2 12 04 02 38 18 PM 2 12 04 05 50 27 PM 10 00 MHz Fs ples 11506 Gate 1 s Ref ch2 10 00 MHz TI Time Data Only TI 1 gt 2 HP 53132A Test 589 CW25_indoor_tim Sam MTIE ETSI PRC 10 _ 3 5 p F fe amp e 5 p 0 gt D o nsec NAySYnNc Specifications subject to change without notice All Rights Reserved Copyright 2010 Navsync Ltd CW12 TIM Application Notes Migrating from Motorola M12 to NavSync CW12 TIM The CW12 TIM was designed to meet the form and functionality of the M12 as closely as possible using NavSync s CW25 receiver module The information contained in the following application notes identifies key similarities between the two products as well as advantages offered by the CW12 TIM This document will also offer guidelines on how to replace the M12 with the CW12 TIM as well as how to design in the CW12 TIM to a new application Key features of the products are highlighted in the following table Feature M12 CW12 TIM 12 Channel J J High Sensitivity x J 1PPS vZ 500
7. on of proprietary messages or Motorola Binary interface 2 RXD NMEA 0183 input to GPS Core Refer to CW25 User Manual for description of proprietary commands or Motorola Binary interface 3 VCC PWR Voltage Supply input 3 0 3 6VDC to be supplied here 4 1PPS O 1 Pulse Per Second output Pulse is 100uS NMEA 0183 or 200 mS Motorola Binary in duration and rising edge signifies top of second 5 GND PWR Power supply return to ground 6 VBATT PWR 3V needs to be supplied here to keep the real time clock alive while the receiver is powered off 7 BOOTSEL Boot select pin allows Firmware to be upgraded when grounded RTCM Not supported in this version 9 ANT_SUPPLY PWR Power supply for active antenna used The voltage applied here needs to reflect the voltage needed by the antenna This supply is limited to 50mA on the CW12 TIM 10 FREQ_OUT O Programmable synchronized frequency output from GPS core this frequency is 10MHz by default but may be changed by sending a NMEA command See CW25 User Manual for details Table 2 Signal Description of IO Connector on the CW12 TIM The CW12 TIM is closely based on the NavSync CW25 GPS Receiver many of the design considerations apply equally to both parts Please refer to the CW25 User Manual for details a Copyright 2010 Navsync Ltd All Rights Reserved Specifications subject to change without notice NAVSYNC CW12 TIM GPS Receiver
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