Racelogic USER GUIDE Manual do Utilizador descarregar pdf (Página 4)

Page | 4 Revision 1.4 15 January 2015

Introduction

LabSat 3 is a lightweight, portable record and replay system for GNSS testing. With the ability to record real

world GNSS signals directly to SD card or HDD storage, the LabSat 3 is a simple to use, fully stand-alone

system. Recorded signals can be replayed back by LabSat 3 in the Lab enabling development and testing of

most types of GNSS equipment. Alternatively SatGen software can also be used to create simulated GNSS

signals from map or user defined trajectory. Despite its simplicity, the LabSat 3 product range supports a

number of powerful features for use in industries such as automotive, sports and aerospace including dual

RF channels for multiple constellation testing, dual CAN Bus recording, inertial sensor logging and battery

powered operation.

Additional features:-

→ Available for GPS, GLONASS, Galileo, BeiDou, QZSS

→ Simple to use one touch recording

→ Record or replay using external USB hard drive

→ RS232, Digital & Dual CAN interface

→ Remote control over Ethernet

→ External 10MHz Reference input

→ OCXO option

→ OEM version available for system integrators

→ Digital input for event marking or 1PPS recording

→ Adjustable attenuation (0 – 31dBm)

→ On-board GNSS receiver for monitoring RF during record and replay

The LabSat 3 line-up includes a number of variants to suit a range of testing requirements. These are:

Version

Description

RLLS03-3RP

Triple RF channel record & replay system with CAN Bus / RS232 / Digital IO

RLLS03-3P

Triple channel replay only system with CAN Bus / RS232 / Digital IO

RLLS03-2RP

Dual RF channel record & replay system with CAN Bus / RS232 / Digital IO

RLLS03-2P

Dual channel replay only system with CAN Bus / RS232 / Digital IO

RLLS03-1RP

Single RF channel record & replay system

RLLS03-1P

Single RF channel replay only system

How does it work?

GNSS stands for Global Navigation Satellite Systems and is a general term that covers satellite positioning

constellations belonging to different countries around the world. These include, among others, the United

States ‘GPS’, the Russian ‘GLONASS’ and the Chinese ‘BeiDou’ systems. LabSat 3 is capable of recording and

then replaying the raw radio signals that are transmitted by the various constellations of satellites. LabSat 3

receives the signal from an antenna just like a standard GNSS receiver but instead of processing each of the

received signals to calculate a position fix, LabSat 3 samples and stores the antenna signal at very high

speed. When the stored antenna signal is replayed by LabSat 3 into a standard GNSS receiver such as a

portable navigation system, the receiver will see essentially, the same signal that it would see if it were

connected to an antenna including movement, delays and multipath effects. This makes LabSat 3 invaluable

for recording moving scenarios such as driving through a city in a car. One of the benefits of using a

recorded test signal is consistency. For example, if testing of a product involves going for a drive each time

the firmware is updated, the satellite positions and atmospheric conditions will be different for every drive.

If the drive is recorded once with LabSat 3, the recorded signal can be replayed over and over on the bench

saving hours of drive time and with the knowledge that the conditions will be the same for each replay.

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