Quectel EC21 Series

LTE Standard Module Series
EC21_Series_Hardware_Design
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4.2.2. GNSS Performance
The following table shows the GNSS performance of EC21 series.
Table 40: 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
Accuracy
(GNSS)
CEP-50
Autonomous
@ open sky
< 2.5 m
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.
NOTE