Novatel OM-AD-0020 L1/L2-I, L1/L2-II

1 - Introduction

Test Bed Receiver Subsystem Addendum – Rev 1 9

OPERATIONAL OVERVIEW

The NovAtel Test Bed Receiver has two functional blocks (see Figure 2):

• Single Frequency GPS GLONASS

• Dual Frequency GPS GEO

Figure 2 Test Bed Receiver Functional Block Diagram

RF/IF

Digitizing

BACKPLANE: Communication and Time SynchronizationSerial Ports Strobe Port

CLK/STATUS

CARD

10 MHz

OCXO

10 MHz

Ext. Osc.

Input

+/- 12 VDC

POWER

SUPPLY

5 VDC

22-30 VDC

Power

L1/L2 GPS

RF/IF

Digitizing

L1/L2 GPS

L1 GEO

RF/IF

Digitizing

Antenna

Input

10 MHz

Int. Osc.

Output

External

Jumper

L1/L2-I

L1/L2-II

GEO Processing

Specific channels on the GPS GEO card have the capability to receive and process the GEO WAAS signal. The signal is

in-band at L1 and is identified with WAAS-specific PRN numbers. The WAAS message is decode d and separated into

its various components. The WAAS message and associated pseudorange is provided as a n output.

GLONASS

Contents

Main Test Bed Receiver Subsystem Addendum Proprietary Notice TABLE OF CONTENTS Page TABLES Page FOREWORD SCOPE PREREQUISITES 1 INTRODUCTION THE NOVATEL TEST BED RECEIVER 1 - Introduction Test Bed Receiver Subsystem Addendum Rev 1 9 OPERATIONAL OVERVIEW L1/L2-I L1/L2-II GEO Processing Single Frequency GPS GLONASS Dual Frequency GPS GEO Other Outputs & Inputs 2 INSTALLATION OF TEST BED RECEIVER MINIMUM CONFIGURATION INTERNAL AND EXTERNAL OSCILLATORS CONNECTING THE EXTERNAL FREQUENCY REFERENCE CONNECTING DATA COMMUNICATIONS EQUIPMENT DCD RXD TXD DTR GND DSR RTS CTS NC CONNECTING THE GPS ANTENNA CONNECTING THE EXTERNAL POWER INPUT USING THE 10 MHz OUTPUT SIGNAL Page 3 OPERATION PRE-START CHECK LIST SERIAL PORTS - DEFAULT SETTINGS START-UP INITIAL COMMUNICATIONS WITH THE TEST BED RECEIVER 4 UPDATE OR UPGRADE YOUR GPSCARD UPGRADING USING THE $AUTH COMMAND UPDATING USING THE LOADER UTILITY TRANSFERRING FIRMWARE FILES USING THE LOADER UTILITY A WAAS OVERVIEW B GLONASS OVERVIEW MILLENNIUM-GLONASS GPSCARD X GLONASS SYSTEM DESIGN The Space Segment The Control Segment The User Segment TIME GLONASS TIME VS. LOCAL RECEIVER TIME DATUM FUNCTIONAL OVERVIEW MILLENNIUM-GLONASS GPSCARD SYSTEM Reference Description Reference Description GPS/GLONASS ANTENNA RADIO FREQUENCY (RF) SECTION DIGITAL ELECTRONICS SECTION Page C COMMANDS CONFIG IONOMODEL WAASCORRECTION LOGS RCCA RECEIVER CONFIGURATION D GLONASS COMMANDS AND LOGS GLONASS-SPECIFIC COMMANDS DGLOTIMEOUT Syntax: Options: PZ90TOWGS84 Syntax: Options: Example: PZ90TOWGS84 DEFAULT UNIMPLEMENTED COMMANDS GLONASS-SPECIFIC LOGS CALA/B CALIBRATION INFORMATION CALA Page CALB Format: Message ID = 87 Message byte count = 32 + (16 * 32) GALA/B ALMANAC INFORMATION GALA GALB Format: Message ID = 78 Message byte count = 112 GCLA/B CLOCK INFORMATION GCLA Table 2 Time Status Example: $GCLA,994,149871.00,10787,10.62179349,167.82950123,1121, -3.0544738044739E-007,9,4,00000000*7B,[CR][LF]GCLB GCLB Format: Message ID = 88 Message byte count = 68 GEPA/B EPHEMERIS INFORMATION GEPA Example: $GEPA,991,496487.00,991,495913.00,10787,4,12,83,0,-2.102581933593754E+007 GEPB Format: Message ID = 77 Message byte count = 156 Page OTHER NOVATEL LOGS RCCA RECEIVER CONFIGURATION E TEST BED RECEIVER - TECHNICAL SPECIFICATIONS Page Appendices 50 Test Bed Receiver Subsystem Addendum Rev 1 Default Channel Assignments INDEX