Novatel 15a, 15aT - page 37

Using Commands and Logs Chapter 4

EuroPak-15a Receiver User Manual Rev 5 37

3. The CRC is a 32-bit cyclic redundancy check performed on all data including the header. See

Section 4.4.2.5 on Page 41 for the CRC algorithm.

4. The header is in the format shown in Tabl e 7 on Page 37.

Table 7: Binary Message Header Structure

Byte Hex Decimal

First AA 170

Second 44 68

Third 12 18

Field Field

Name Field

Type Description Binary

Bytes Binary

Offset Ignored

on Input

1sync Char Hexadecimal 0xAA 1 0 N

2sync Char Hexadecimal 0x44 1 1 N

3sync Char Hexadecimal 0x12 1 2 N

4header

length UChar Length of the header 1 3 N

5message

ID UShort Message ID. The message IDs for logs are given in

Table34 on Page 71.2 4 N

6message

type Char Message type indicator, as explained in Section

4.2.1 on Page 34.1 6 N

7port

address Char The port from which the log was generated.

See Table 10 on Page 39.1 7 N

8message

length UShort The length in bytes of the body of the message. This

does not include the header nor the CRC. 2 8 N

9sequence UShort

For multiple related logs. A number that counts

down from N-1 to 0 where N is the number of

related logs and 0 means it is the last one of the set.

Most logs only come out one at a time in which case

this number is 0.

210 N

10 idle time Char The percentage of time that the processor is idle in

the last second. Take the time (0-200) and divide by

two to give the percentage of time (0-100%). 112 Y

11 time status Enum The quality of the GPS time, as described in Section

4.4.2.4 on Page 40 1 a13 N b

12 week UShort GPS week number 214 N b

13 milli-

seconds GPSec Milliseconds from the beginning of the GPS week 416 N b

14 receiver

status ULong 32 bits representing the status of various hardware

and firmware components of the receiver. This

number is described in Table 46 on Page 93.420 Y

15 Reserved UShort Reserved for internal use 224 Y

16 UShort 226 Y

a. This ENUM is not 4 bytes long but, as indicated in the table, is only 1 byte.

b. These time fields are ignored if Field #11, Time Status, is invalid. In this case the current receiver time is used. The

recommended values for the three time fields are 0, 0, 0.

Contents

Main EuroPak-15a Receiver User Manual Table of Contents 2 Installation 23 3 Operation 28 4 Using Commands and Logs 31 5 Commands 43 6 Data Logs 70 Appendices Figures Tabl es Page Notices FCC NOTICE CE NOTICE Electromagnetic Compatibility (EMC) Software License Page Warranty Policy Customer Service Contact Information Firmware Updates Foreword Scope Prerequisites Conventions Compliance with GPS Week Rollover Chapter 1 Introduction 1.1 Overview of the EuroPak-15a 1.2 SBAS Overview 1.3 Galileo Overview 1.3.1 Open Service 1.3.2 Commercial Service 1.3.3 Safety-of-Life Service 1.3.4 Public Regulated Service 1.3.5 Search and Rescue Service 1.4 EuroPak-15a Enclosure 1.5 EuroPak-15a Features 1.5.1 GEO Signal Processing 1.5.2 Digital Pulse Blanking 1.6 Functional Overview 1.7 Internal Euro-L1E5a Card 1.7.1 Radio Frequency Section 1.7.2 Digital Electronics Section 1.8 Antenna or Signal Generator 1.9 Principal Power Supply 1.10 Data Communications Equipment Chapter 2 Installation 2.1 Additional Equipment Required 2.1.1 Selecting an Antenna or Signal Generator 2.1.2 Choosing a Coaxial Cable 2.1.3 Power Supply Requirements 2.2 Installation Overview Page 2.2.3 Applying Power to the Receiver 2.2.4 Connecting Data Communications Equipment 2.3 Additional Features and Information 2.3.1 Strobes 2.3.2 Status Indicators 2.3.3 External Oscillator 2.3.4 Mounting Bracket Chapter 3 Operation 3.1 Pre-Start Check List 3.2 Start-Up 3.3 Communicating with the EuroPak-15a 3.4 Getting Started 3.4.1 Starting the Receiver 3.4.2 Communicating with the Receiver Using GPSolution (Aviation) Page Chapter 4 Using Commands and Logs 4.1 Entering Commands 4.1.1 Command Settings on Power-Up 4.1.2 Determining the Current Command Settings 4.1.3 Response Formats 4.1.4 Response Messages Page 4.2 Logging Data 4.2.1 Log Types 4.2.2 Log Triggers 4.2.3 Specifying Log Formats 4.3 Log Formats 4.3.1 ASCII 4.3.2 Binary Page 4.4 Fields 4.4.1 Field Types 4.4.2 Commonly-Used Fields Page Page 42 EuroPak-15a Receiver User Manual Rev 5 Chapter 4 Using Commands and Logs Chapter 5 Commands 5.1 Functional Listing of Commands 5.2 Command Summary 5.3 Command Reference 5.3.1 AGCMODE Control Automatic Gain Control Page 5.3.2 ASSIGN Assign Individual Satellite Channels Page 5.3.3 CHANCONFIG 5.3.4 CLOCKADJUST 5.3.5 COM Serial Port Configuration Control Page 5.3.6 ECUTOFF Set Satellite Elevation Cut-off 5.3.7 EXTERNALCLOCK Syf() h2 f ------- h f ------- h0h1fh ++++= Page 5.3.8 FIX Constrain to Fixed Position Commands Chapter 5 * * EuroPak-15a Receiver User Manual Rev 5 57 Figure 4: The WGS84 ECEF Coordinate System 5.3.9 FRESET Clear Data in NVM 5.3.10 LOG Request Logs from Receiver Page 5.3.11 POSITIONTYPE Set the Position Solution 5.3.12 PULSEBLANKING Enable/Disable Pulse Blanking 5.3.13 RESET Hardware Reset 5.3.14 SDLLBW Configure DLL Filter Bandwidth 5.3.15 SPLLBW Configure Phase-Lock-Loop Bandwidth = 4 filter constant 5.3.16 STHRESHOLD Control Signal Thresholds 5.3.17 UNASSIGN Unassign a Previously Assigned Channel 5.3.18 UNLOG Remove Log from Logging Control 5.3.19 UNLOGALL Remove All Logs from Logging Control 70 EuroPak-15a Receiver User Manual Rev 5 Chapter 6 Data Logs 6.1 Functional Listing of Logs 6.2 Log Summary 6.3 Log Reference 6.3.1 AGCSTATS Automatic Gain Control Status EuroPak-15a Receiver User Manual Rev 5 73 Table 35: AGC Status Word Page EuroPak-15a Receiver User Manual Rev 5 75 6.3.2 ALMANAC Decoded Almanac Page 6.3.3 CLOCKMODEL Current Clock Model Status 78 EuroPak-15a Receiver User Manual Rev 5 Log Type: Synch Message ID: 16 Page 80 EuroPak-15a Receiver User Manual Rev 5 6.3.4 PSRPOS Pseudorange Position Page 6.3.5 RANGE Satellite Range Information Page 84 EuroPak-15a Receiver User Manual Rev 5 Table 40: Channel Tracking Status EuroPak-15a Receiver User Manual Rev 5 85 Table 41: Tracking State Bit Values Table 42: Correlator Spacing Bit Values 6.3.6 RAWEPHEM Raw Ephemeris 6.3.7 RAWFRAME Raw Subframes 6.3.8 RXCOMMANDS Receiver Configuration Page Page 6.3.9 RXSECSTATUS Receiver Section Status 92 EuroPak-15a Receiver User Manual Rev 5 Table 45: Receiver Error EuroPak-15a Receiver User Manual Rev 5 93 Table 46: Receiver Status 6.3.10 SATVIS Satellite Visibility Page 6.3.11 SYSTEMLEVELS System Hardware Levels 6.3.12 TIME Time Data 98 EuroPak-15a Receiver User Manual Rev 5 6.3.13 TRACKSTAT Tracking Status Page 6.3.14 VERSION Version Information EuroPak-15a Receiver User Manual Rev 5 101 Table 50: Version Log Field Formats Chapter 7 Firmware Updates 7.1 Contacting the NovAtel Aviation Department 7.2 Downloading the Files 7.3 Decompressing the Files 7.4 Running the Utility 7.4.1 Open a File to Download 7.4.2 Communications Settings 7.4.3 Downloading Firmware Page Chapter 8 Built-In Status Test 8.1 Overview 8.2 Receiver Status Word 8.3 Error Strobe Signal 8.4 Receiver Status Log 8.4.2 Error Word 0 0 C C 0 0 0 0 0000 0000 1100 1100 0000 0000 0000 0000 Bit 0 Bit 31 0 0 0 0 0 0 0 0 0000 0000 0000 0000 0000 0000 0000 0000 Bit 0 Bit 15 Page 110 EuroPak-15a Receiver User Manual Rev 5 Appendix A Technical Specifications Table 52: Performance Specifications PERFORMANCE All values subject to GPS system characteristics A.1 EuroPak-15a and EuroPak-15aT Enclosures 112 EuroPak-15a Receiver User Manual Rev 5 INPUT/OUTPUT DATA INTERFACE INPUT/OUTPUT STROBES Technical Specifications Appendix A EuroPak-15a Receiver User Manual Rev 5 113 INPUT/OUTPUT CONNECTORS ENVIRONMENTAL A.1.1 Port Pin-Outs A.1.2 Cables Page Page Page Page 120 EuroPak-15a Receiver User Manual Rev 5 A.2 Channel Assignments Table 56: 16GPSL1L5 Channel Configuration Technical Specifications Appendix A EuroPak-15a Receiver User Manual Rev 5 121 Table 57: 16GALILEOL1E5a Channel Configuration Table 58: 12GPS4GEOL1L5 Channel Configuration 122 EuroPak-15a Receiver User Manual Rev 5 Table 59: 8GPS8GEO Channel Configuration Table 60: 16GPSL5 Channel Configuration Appendix B Electrostatic Discharge Control (ESD) Practices B.1 Overview B.2 Handling ESD-Sensitive Devices B.3 Prime Static Accumulators B.4 Handling Printed Circuit Boards Appendix C Standards/References Appendix D Replacement Parts D.1 EuroPak-15a D.2 Accessories D.3 Manufacturers Part Numbers Index