Product Info

LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design
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4 GNSS Receiver
4.1. General Description
EG91 series module includes a fully integrated global navigation satellite system solution that supports
Gen8C-Lite of Qualcomm (GPS, GLONASS, BeiDou, Galileo and QZSS).
EG91 series module supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1Hz 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, please refer to document [3].
4.2. GNSS Performance
The following table shows GNSS performance of EG91 series module.
Table 23: GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Cold start
Autonomous
-146
dBm
Sensitivity
Reacquisition Autonomous
(GNSS)
-157
dBm
Tracking Autonomous
-157
dBm
Cold start
Autonomous
34.6
s
@open sky
XTRA enabled
TTFF
11.57
s
(GNSS)
Autonomous
Warm start
26.09
s
@open sky
XTRA enabled
3.7
s