User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 47 / 83
4.2. GNSS Performance
The following table shows EC20 GNSS performance.
Table 21: GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Sensitivity
(GNSS)
Cold start
Autonomous
-146
dBm
Reacquisition
Autonomous
-156
dBm
Tracking
Autonomous
-157
dBm
TTFF
(GNSS)
Cold start
@open sky
Autonomous
35
s
XTRA enabled
22
s
Warm start
@open sky
Autonomous
30
s
XTRA enabled
3.5
s
Hot start
@open sky
Autonomous
2
s
XTRA enabled
1.5
s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
<1.5
m
1. Tracking sensitivity: the lowest GPS signal value at the antenna port for which the module can keep
on positioning for 3 minutes.
2. Reacquisition sensitivity: the lowest GPS signal value at the antenna port for which the module can
fix position again within 3 minutes after loss of lock.
3. Cold start sensitivity: the lowest GPS signal value at the antenna port for which the module fixes
position within 3 minutes after executing cold start command.
NOTES