Specifications

Rev 1.0 1/27/14 36

Reference Guide

Interfaces

3.2.2.3.3. A-GPS Features

• Leading A-GPS performance

Exceeds 3GPP RAN 4 AGPS performance specification

• -153 dBm cold start sensitivity

• -155 dBm tracking sensitivity

• < 5 second average cold start TTFF in open sky (UE-based)

• < 3 second average super hot TTFF in open sky

• < 2 m accuracy in open sky 1 Hz tracking with CEP-50

• UMTS Control Plane (CP) – UE-assisted and UE-based

• GSM Control Plane (CP) – UE-assisted and UE-based

3.2.2.3.4. Enhanced Navigation 2.0 Feature

• Provides leading performance in car and walking navigation modes as well as

accuracy while stationary

• Airline/Game/Offline mode

• GPS capability is available while phone is offline

3.2.2.3.5. NMEA

Supported sentences: GGA, GSA, GSV, RMC, VTG

3.2.2.3.6. Active GPS Antenna Bias

The USR3500 provides bias for active antenna, which can be enabled or disabled

using GPIO44. Note that GPIO44 needs to be at high level for antenna bias to be

activated.