User's Manual

GE910 Hardware User Guide

GE910 Hardware User GuideGE910 Hardware User Guide

GE910 Hardware User Guide

1vv0300962 Rev.9-bis3 2013-05-20

Mod. 0805 2011-07 Rev.2

7. Global Navigation Satellite System (GE910-GNSS)

The GNSS part of GE910-GNSS module is a new age of receiver that can simultaneously search

and track satellite signals from multiple satellite constellations. This multi-GNSS receiver uses

the entire spectrum of GNSS systems available: GPS, Glonass, Galileo and QZSS.

It features advanced real time hardware correlation engine for enhanced sensitivity navigation

engine (PVT), Fast Acquisition giving rapid Time-to-First-Fix (TTFF), low power consumption

and fast time to first fix, 32 track verification channels, stand Alone and Assisted mode and

Satellite Based Augmentation Systems (SBAS): WAAS, EGNOS, and MSAS. It also offers an

accurate timing pulse and jamming immunity.

Operation in a high interference signal environment is common practice in today’s electronic

age. By incorporating 3-stage rejection architecture, it is able to remove interfering signals pre-

and post-correlation.

With the help of advanced digital signal processing algorithms and the use of A-GPS data, the

receiver is capable to achieve higher sensitivity values required for indoor applications.

The following table is listing the GE910 variants that support the GNSS receiver:

Product GNSS Receiver

GE910-QUAD

GE910-GNSS

YES

NOTE:

The GNSS part of GE910-GNSS module has the same electrical and performance specifications

as referred in Telit “SL869 Product Description”. Please refer to that document for more detail

information.

7.1. Principles of operation

The GSM and GNSS part of the module can be used in two ways: standalone or hosted.

In the standalone mode the GE910-GNSS module has independent Power ON-OFF and UART.

In the hosted mode the GNSS is controlled by GSM at start-up, left GNSS_EN* pad

unconnected. In this mode the GNSS commands and NMEA strings can be either through the

dedicated GNSS UART3 or via GSM UARTs, leaving UART3 for different use.

The GNSS firmware is upgradable as standalone or host, in host operation, leave GNSS_BOOT

(GNSS_NMEA_TX) pin floating. In Standalone mode of operation place into BOOT mode by

tying GNSS_BOOT pin to Ground through a 1K pull-up resistor.

The host serial I/O port of the receiver’s serial data interface supports full duplex

communication between the receiver and the user.

The default serial configuration on UART3 (GNSS_NMEA_UART) is as follows: NMEA, 4800

bps, 8 data bits, no parity, and 1stop bit.