Gnss Receiver; General Description; Gnss Performance - Quectel EC21 Series Hardware Design

4

GNSS Receiver

4.1. General Description

EC21 includes a fully integrated global navigation satellite system solution that supports Gen8C-Lite of
Qualcomm (GPS, GLONASS, BeiDou, Galileo and QZSS).
EC21 supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1Hz data update rate via
USB interface by default.
By default, EC21 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 EC21.
Table 24: GNSS Performance
Parameter Description
Cold start
Sensitivity
Reacquisition
(GNSS)
Tracking
Cold start
@open sky
TTFF
(GNSS)
Warm start
@open sky
EC21_Hardware_Design
Conditions
Autonomous
Autonomous
Autonomous
Autonomous
XTRA enabled
Autonomous
XTRA enabled
Confidential / Released
LTE Module Series
EC21 Hardware Design
Typ. Unit
-146 dBm
-157 dBm
-157 dBm
35 s
18 s
26 s
2.2 s
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