LTE Standard Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design 36 / 79
4
GNSS Receiver
4.1. General Description
EC25 Mini PCIe includes a fully integrated global navigation satellite system solution that supports
Qualcomm Gen8C Lite (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, EC25 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 the GNSS performance of EC25 Mini PCIe.
Table
17: 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
Hot start
@open sky
Autonomous
2.5
s
XTRA enabled
1.8
s