Quectel UC20

UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 56 / 84
4.2. GNSS Performance
The following table shows UC20 GNSS performance.
Table 24: GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Sensitivity
(GNSS)
Cold start
Autonomous
-144
dBm
With LNA
-147
dBm
Reacquisition
Autonomous
-154
dBm
With LNA
-159
dBm
Tracking
Autonomous
-155
dBm
With LNA
-160
dBm
TTFF
(GNSS)
Cold start
@open sky
Autonomous
32
s
XTRA enabled
22
s
Warm start
@open sky
Autonomous
29
s
XTRA enabled
3
s
Hot start
@open sky
Autonomous
2.5
s
XTRA enabled
2
s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
<1.5
m
1. Tracking sensitivity: The lowest GPS signal level at the antenna port which the module does not fail
to fix within 5 minutes by reducing signal intensity.
2. Reacquisition sensitivity: The lowest GPS signal level at the antenna port which the module fixes
within 3 minutes by increasing signal intensity.
3. Cold start sensitivity: The lowest GPS signal level at the antenna port which the module fixes within 3
minutes by executing cold start command.
NOTES