Product Info

Smart Module Series
SC600Y&SC600T Hardware Design
SC600Y&SC600T_Hardware_Design 97 / 134
5 GNSS
SC600Y/SC600T integrates a Qualcomm IZat™ GNSS engine (Gen 8C) which supports multiple positioning and
navigation systems including GPS, GLONASS and BeiDou. With an embedded LNA, the module provides greatly
improved positioning accuracy.
5.1. GNSS Performance
The following table lists the GNSS performance of SC600Y/SC600T module in conduction mode.
Table 33: GNSS Performance
5.2. GNSS RF Design Guidelines
Bad design of antenna and layout may cause reduced GNSS receiving sensitivity, longer GNSS positioning time,
or reduced positioning accuracy. In order to avoid these, please follow the design rules listed below:
 Maximize the distance between the GNSS RF part and the GPRS RF part (including trace routing and
antenna layout) to avoid mutual interference.
 In user systems, GNSS RF signal lines and RF components should be placed far away from high speed
circuits, switched-mode power supplies, power inductors, the clock circuit of single-chip microcomputers, etc.
 For applications with harsh electromagnetic environment or high ESD-protection requirements, it is
recommended to add ESD protective diodes for the antenna interface. Only diodes with ultra-low junction
Parameter Description Typ. Unit
Sensitivity (GNSS)
Cold start -142 dBm
Reacquisition -153 dBm
Tracking -153 dBm
TTFF (GNSS)
Cold start 86 s
Warm start 70 s
Hot start <10 s
Static Drift (GNSS) CEP-50 <80 m