NAVSYNC CW25 User Manual - page 2
CW25 Software User Manual
Page
2 of 50
Rev 03
Date: 06/16/08
Copyright ©2007 NavSync Ltd.All Rights Reserved
Specifications subject to change without notice.
1. DESCRIPTION .............................................................................................................................................................. 4-6
1.1 Introduction ................................................................................................................................................... 4
1.2 Global Positioning System ........................................................................................................................... 5
1.3 GPS Positioning and Navitation .................................................................................................................. 5
1.4 Standard Positioning Service (SPS) ............................................................................................................ 6
1.5 Precise Positioning Service (PPS) .............................................................................................................. 6
2.SPECIFICATION ............................................................................................................................................................ 7-8
2.1 Performance ................................................................................................................................................. 7
2.2 Recommended Ratings ............................................................................................................................... 7
2.3 Absolute Maximum Ratings ......................................................................................................................... 8
2.4 Block Diagram .............................................................................................................................................. 8
3. PHYSICAL CHARACTERISTICS ............................................................................................................................... 9-10
3.1 Physical Interface Details ............................................................................................................................ 9
3.2 MCM Dimensions ...................................................................................................................................... 10
3.3 Solder Pad Size and Placement .............................................................................................................. 10
4. SIGNAL DESCRIPTION ............................................................................................................................................ 11-14
4.1 Power Signals ........................................................................................................................................... 11
4.2 RF Signals ................................................................................................................................................. 12
4.3 Emulation/Test Signals ............................................................................................................................. 12
4.4 Control Signals .......................................................................................................................................... 13
4.5 I/O Signals ............................................................................................................................................ 13-14
5. FEATURES ..................................................................................................................................................................... 15
5.1 Power on Reset ......................................................................................................................................... 15
5.2 Time Transfer ............................................................................................................................................. 15
5.3 CW25 Embedded Identification ................................................................................................................ 15
5.4 Build Options ............................................................................................................................................. 15
6.OPERATING MODES ...................................................................................................................................................... 16
6.1 Stand Alone Operation ............................................................................................................................. 16
6.2 Net Assisted Operation ............................................................................................................................. 16
7. POWER MANAGEMENT ............................................................................................................................................... 16
7.1 Coma Mode ............................................................................................................................................... 16
8. COMMUNICATIONS PROTOCOLS .......................................................................................................................... 17-30
8.1 Port Configurations ................................................................................................................................... 17
8.2 Output Format ....................................................................................................................................... 17-24
8.2.1 NMEA Messages ............................................................................................................................. 17
8.2.1.1 GPGLL - Geographic position, Lat/Lon ................................................................................... 17
8.2.1.2 GPGGA - GPS fix data .............................................................................................................. 18
8.2.1.3 GPGSA - GPS DOP and Active satellites ................................................................................ 18
8.2.1.4 GPGSV - GPS Satellites in View .............................................................................................. 19
8.2.1.5 GPRMC - Recommended Minimum data ................................................................................ 19
8.2.1.6 PVTG - Course over ground and Ground speed. ................................................................... 20
8.2.1.7 GPZDA - UTC Time and Date .................................................................................................. 20
8.2.1.8 POLYT - Time of Day ................................................................................................................. 20
8.2.1.9 POLYP- Position Data ............................................................................................................... 21
8.2.1.10 POLYS - Satellite Status ......................................................................................................... 22
8.2.1.11 POLYI, Additional Information Message ................................................................................ 22
8.2.2 Debug Messages ........................................................................................................................ 23-24
8.2.2.1 Navigation and Timing Summary ($11) .................................................................................. 23
8.2.2.2 RF & AGC data ($52) ................................................................................................................ 24
TABLE OF CONTENTS