CW46S GPS Sensor
Contents
1. Output 30ns rms accuracy lt 5ns resolution RS422 Format Frequency Output 10 MHz Sine Wave 3 1Vp p into 100 ohms 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 E Copyright 2011 Navsync Ltd All Rights Reserved opecifications subject to change without notice CWA6S GPS MTIE PERFORMANCE The graph below demonstrates the MTIE performance of the CW46S output frequency relative to a Caesium atomic clock with the CW46S operating with a clear view of the sky MTIE Fo 10 00 MHz Fs 1 000 Hz 11 19 03 05 45 08 PM 11 20 03 09 08 18 AM HP 53132A Test 545 10 MHz NCO Samples 55388 Gate 1 s Ref ch2 10 00 MHz Tl Time Data Only TI 122 Observation Window T au The graph below demonstrates the ability of the CW46S to continue to provide a GPS disciplined output frequency with the GPS aerial located completely inside a building the degradation of MTIE perfor mance is due to the effects of signal multi path MTIE Fo 10 00 MHz Fs 999 0 MHz 2 12 04 02 38 18 PM 2 12 04 05 50 27 PM HP 53132A Test 589 CW25 indoor tim Samples 11506 Gate 1 s Ref ch2 10 00 MHz Tl Time Data Only TI 122 Observation Window T au Copyright 2011 Navsync Ltd All Rights Reserved Specifications subject to change without notice N AVSY a C CWA62. CW46S GPS Sensor Description The CW46S GPS sensor is a fully inte grated module that includes a CW25 GPS receiver DC DC converter RS232 or RS422 interface options and active GPS antenna all housed in a small weatherproof IP67 rated enclosure The CW46S can be easily mounted on a pole or wall bracket available When mounted with a good sky view the CW46S receiver can provide high quality timing and synchronization The 1 Pulse Per Second timing signal can provide accuracies to within 30nS RMS of Coordinated Universal Time UTC The 1PPS is transmitted via RS422 signal format this 2 wire method allows the pulse to be transmitted with cable lengths exceeding 100 metres The CW46S utilizes the CW25 TIM GPS receiver the CW25 TIM s well established and proven timing performance allows the CW46S to act as a complete timing module and is capable of outputting a GPS disciplined 10MHz frequency The frequency can achieve full PRC MTIE performance in Features good signal areas The 10MHz is convert e 1 PPS Aligned to UTC Second ed to a 100Q sine wave before transmis e GPS Disciplined 10 MHz sion ideal for a 100 twisted pair cable e Wide DC Power Range Note Contact NavSync before using this e IP67 Rated Waterproof Box frequency option The CW46 module can be sold with or without the cable assembly This allows customers to make their own cable poten tially reducing upfront costs and shipping charges NavSync can pr
3. S RS232 Pin Out View Looking into CW46S Connector Pin Name Description 1 NC Not Connected 2 TX Serial Transmit RS232 Output 3 HX Serial Receive RS232 Input 4 PPS 1 Pulse Per Second Signal RS422 Non Inverted Output 5 PPS 1 Pulse Per Second Signal RS422 Inverted Output 6 10M 10 MHz Freg Output Sine Wave 3 1Vp p into 100 ohm T C Shield Cable Shield Option Can help reduce noise on timing signals 8 NC Not Connected 9 Vin Voltage Supply Input 6 5V to 30VDC to be supplied here 10 GND Ground Power Supply Return CW46S NS49 PB Product Brief P01 Page 4 Date 01 11 11 N AVSY C Copyright 2011 Navsync Ltd All Rights Reserved opecifications subject to change without notice CW46S OVERVIEW amp SETUP INSTRUCTIONS Setup Instructions Place the CW46S where it has a good view of the sky 1 Secure cable assembly to CW46S 2 Connect the comms and timing signals to appropriate device s 3 Apply power supply voltage 6 5V to 30V DC 4 Data should start to stream at 38400 Baud 8 Bits no party 1 stop Bit 5 Wait for GPS lock 6 The 1PPS is now available The 10Mhz is off by default if required this can be turned on with the command PRTHS FRQD 10 lt CR gt lt LF gt After GPS lock is achieved the receive will complete a self survey of its location The self survey will take 10min approx to complete When complete timing performance is optimised and the 10Mhz frequency ref
4. erence is available For more information on the details of the NMEA stream and serial commands see NavSync s CW25 User Manual Copyright 2011 Navsync Ltd All Rights Reserved Specifications subject to change without notice APPENDIX 1 CW46S RS232 Standard Cable Assembly V eH LE00r SS DuiweJq Ajquessy e qe2 CECSU S9VM D NddH9 pu9 or NMONH UA 6 ON 8 peJinbaJ se peziuojsno eq ueo pui o HE ALIHM NaIUD WOT 9 SIDIOIN O 0Z 0L G JSLIHM 39NVHO Sdd S ejqe ieAe suyBue ejqe psepueys d9NVNO Sdd JifY 18 Xe JLIHWNMO GS XL Cc NMONH UIA L bl JLIHM N33H2 WOT S Ca TLIHM 39NVHO Sdd Y e rv d9NVHO Sdd cma 3 mn p 00 5 3UHWNMONS x r P ld Stra o o 3909 d0L 0Lp0Xd Nd opecifications subject to change without notice All Rights Reserved Copyright 2011 Navsync Ltd NAVSUnc CW46S GPS Sensor Revision Revision Date Note POO 08 06 10 Preliminary Release PO1 01 11 11 New Block Diagram and Description Text In North America NavSy nc Ltd H eadquarter 3 2111 Comprehensive Drive Bay 143 Aurora IL 60505 USA Shannon Industrial Estate Phone 630 236 3026 Shannon Co Clare Ireland E mail northamerica navsync com Phone 353 61 475 666 E mail sales navsync com www navsync com
5. ovide and cus tomize the standard cable assembly see appendix on request if a cable is required e RoHS Compliant Applications e Stratum 1 Timing Source e Synchronizing Wireless Networks e Synchronizing Remote Switch Sites Block Diagram GPS Active Antenna eee ere Conversion MEA command CW25 GPS Receiver p PPSH R5442 Conversion p PPS Bulletin NS49 PB Revision P01 Date 11 Jan 2011 DC DC sine vvave Filter 1 Nhz 5 5 30VDc NAVSUnc CWA6S GPS SENSOR SPECIFICATIONS SPECIFICATIONS Physical Module Dimensions 140mm length x 91mm width x 43mm height Module Rating IP67 Supply Voltage 6 5V 30 VDC 48 VDC option also available Operating Storage Temp 30 C to 75 C 40 C to 85 C Humidity 5 to 95 non condensing Max Velocity Altitude 515ms 18 000m Max Acceleration Jerk 4g 1gs sustained for less than 5 seconds sensitivity Acquisition Tracking 155dBW 155dBW Acquisition Cold 45s Time Warm 38s Hot 5S He acquisition 0 5s 9096 confidence Accuracy Position Outdoor 5m rms Velocity 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 1 5W typically dependant of software build Interfaces Serial RS232 RS422 Programmable Baud Rate up to 38400 default baud set to 38400 Protocols NMEA 0188 Proprietary ASCII 1pps Timing
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