Gnss Performance - Quectel EC21 Series Hardware Design

4.2.2. GNSS Performance

The following table shows the GNSS performance of EC21 series.
Table 40: GNSS Performance
Parameter Description
Cold start
Sensitivity
Reacquisition
(GNSS)
Tracking
Cold start
@ open sky
TTFF Warm start
(GNSS) @ open sky
Hot start
@ open sky
Accuracy
CEP-50
(GNSS)
NOTE
1. Tracking sensitivity: the minimum GNSS signal power at which the module can maintain lock (keep
positioning for at least 3 minutes continuously).
2. Reacquisition sensitivity: the minimum GNSS signal power required for the module to maintain lock
within 3 minutes after loss of lock.
3. Cold start sensitivity: the minimum GNSS signal power at which the module can fix position
successfully within 3 minutes after executing cold start command.
EC21_Series_Hardware_Design
Conditions
Autonomous
Autonomous
Autonomous
Autonomous
XTRA enabled
Autonomous
XTRA enabled
Autonomous
XTRA enabled
Autonomous
@ open sky
LTE Standard Module Series
Typ. Unit
-146 dBm
-157 dBm
-157 dBm
35 s
18 s
26 s
2.2 s
2.5 s
1.8 s
< 2.5 m
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