Product Info

LTE-A Module Series
EM121R-GL Hardware Design
EM121R-GL Hardware Design 64 / 80
5.2.4. GNSS Performance
Table 40: EM121R-GL GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Sensitivity
(GNSS)
Cold start
Autonomous
-148
dBm
Reacquisition
Autonomous
-160
dBm
Tracking
Autonomous
-159
dBm
TTFF
(GNSS)
Cold start
@ open sky
Autonomous
27.46
s
XTRA enabled
17.07
s
Warm start
@ open sky
Autonomous
26.45
s
XTRA enabled
1.53
s
Hot start
@ open sky
Autonomous
1.02
s
XTRA enabled
1.03
s
Accuracy
(GNSS)
CEP-50
Autonomous
@ open sky
2.08
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 the 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.
5.3. Antenna Connectors
5.3.1. Antenna Connector Location
The antenna connector locations are shown below.
NOTES