Smart Module Series
SC606T Series Hardware Design
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5
GNSS
The module integrates a GNSS engine (Gen 8C) which supports multiple positioning and navigation
systems including GPS, GLONASS, and BeiDou. With an embedded LNA, the positioning accuracy of the
module has been significantly improved.
5.1. GNSS Performance
The following table lists the GNSS performance of the module in conduction mode.
Table 29: GNSS Performance
5.2. GNSS Design Guidelines
Bad design of antenna signal traces layout may cause reduced GNSS receiving sensitivity, longer GNSS
positioning time, and reduced positioning accuracy. To avoid these, follow the design rules listed below:
⚫
Maximize the distance between the GNSS RF part and the GPRS RF part (including trace routing
and antenna traces layout) to avoid mutual interference.
Parameter
Description
Typ.
Unit
Sensitivity (GNSS)
Cold start
-145
dBm
Reacquisition
-157
dBm
Tracking
-157
dBm
TTFF (GNSS)
Cold start
34.3
s
Warm start
26.9
s
Hot start
3.7
s
Static Drift (GNSS)
CEP-50
< 2.5
m