Product Info
LTE Standard Module Series
EC25 Series Hardware Design
EC25_Series_Hardware_Design 68 / 126
4 GNSS Receiver
4.1. General Description
EC25 includes a fully integrated global navigation satellite system solution that supports Gen8C-Lite of
Qualcomm (GPS, GLONASS, BeiDou, Galileo and QZSS).
EC25 supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1 Hz data update rate via
USB interface by default.
By default, EC25 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 the GNSS performance of the module.
Table 25: 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
35
s
XTRA enabled
18
s
Warm start
@ open sky
Autonomous
26
s
XTRA enabled
2.2
s