Quectel LTE Standard Module Series - GNSS Receiver; General Description; GNSS Performance

LTE Standard Module Series
EG21-G Mini PCIe Hardware Design
EG21-G_Mini_PCIe_Hardware_Design 31 / 54
4 GNSS Receiver
4.1. General Description
EG21-G Mini PCIe includes a fully integrated global navigation satellite system solution that supports
Gen8C-Lite of Qualcomm (GPS, GLONASS, BeiDou/Compass, Galileo and QZSS). Additionally, it
supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1Hz data update rate via USB
interface by default.
By default, EG21-G Mini PCIe 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 EG21-G Mini PCIe.
Table 15: GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Sensitivity
(GNSS)
Cold start
Autonomous
-146
dBm
Reacquisition
Autonomous
-156
dBm
Tracking
Autonomous
-157
dBm
TTFF
(GNSS)
Cold start
@open sky
Autonomous
35
s
XTRA enabled
15
s
Warm start
@open sky
Autonomous
28
s
XTRA enabled
3
s
Hot start
@open sky
Autonomous
2
s
XTRA enabled
1.6
s