Product Info

LTE Module Series
EC25 Hardware Design
EC25_Hardware_Design 70 / 112
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 1Hz 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 GNSS performance of EC25.
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