Gnss Receiver; General Description; Gnss Performance - Quectel EC25-AUX Hardware Design

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 the GNSS performance of EC25.
Table 25: GNSS Performance
Parameter Description
Cold start
Sensitivity
Reacquisition
(GNSS)
Tracking
Cold start
@open sky
TTFF
(GNSS)
Warm start
@open sky
EC25_Hardware_Design
Conditions
Autonomous
Autonomous
Autonomous
Autonomous
XTRA enabled
Autonomous
XTRA enabled
LTE Standard Module Series
EC25 Hardware Design
Typ.
-146
-157
-157
35
18
26
2.2
Unit
dBm
dBm
dBm
s
s
s
s
69 / 130