Service Guide

LTE Standard Module Series

EG91_Series_Hardware_Design

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GNSS Receiver

4.1. General Description

EG91 series module includes a fully integrated global navigation satellite system solution that supports

GPS, GLONASS, BeiDou, Galileo and QZSS.

EG91 series module supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1 Hz data

update rate via USB interface by default.

By default, EG91 series module GNSS engine is switched off. It has to be switched on via AT command.

For more details about GNSS engine technology and configurations, see document [4].

4.2. GNSS Performance

The following table shows GNSS performance of EG91 series module.

Table 22: GNSS Performance

Parameter Description Conditions Typ. Unit

Sensitivity

(GNSS)

Cold start Autonomous -146 dBm

Reacquisition Autonomous -157 dBm

Tracking Autonomous -157 dBm

TTFF

(GNSS)

Cold start

@ open sky

Autonomous 34.6 s

XTRA enabled 11.57 s

Warm start

@ open sky

Autonomous 26.09 s

XTRA enabled 3.7 s

Hot start Autonomous 1.8 s