User's Manual

HE910 Hardware User Guide
1vv0300925 Rev.28 – 2015-06-24
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 51 of 51
7 GPS Receiver
The HE910 module is integrating a GPS receiver that could be used in Autonomous or in A-GPS
(assisted GPS) mode.
With the help of advanced digital signal processing algorithms and the use of A-GPS data, the receiver
is capable to achieve sensitivity values of better than -165 dBm as is required for indoor applications.
The following table is listing the HE910 variants that support the GPS receiver:
Product GPS Receiver
HE910
YES
HE910-D
NO
HE910-GL
NO
HE910-EUR
NO
HE910-EUD
NO
HE910-EUG
YES
HE910-NAR
NO
HE910-NAD
NO
HE910-NAG
YES
7.1 GPS Performances
• Advanced real time hardware correlation engine for enhanced sensitivity (better than -165 dBm for
A-GPS).
• Fast Acquisition giving rapid Time-to-First-Fix (TTFF)
• Capability to monitor up to 28 channels
• Stand Alone and Assisted mode
• Integrated LNA
The following Table is listing the main characteristics:
Characteristic Typical Values
GPS RX Sensitivity -164dBm
GPS Cold Start Autonomous -147dBm
GPS Hot Start Autonomous -161dBm
GPS tracking mode -166 dBm
GPS Accuracy 3m
TTFF from Cold Start 42 sec
TTF from Warm Start 30sec
TTF from Hot Start 1.8 sec
Power Consumption in Acquisition 46.4 mA @3.8V
Power Consumption in Tracking 37.8 mA @3.8V
Power Consumption in Low Power Tracking 25.7 mA @3.8V