Intermec CN50 User Manual page 39

Chapter 1 — Using the CN50
In Standalone mode, the CN50 GPS module relies solely on GPS
satellites to determine position.
In Assisted GPS mode, the CN50 can determine position without
receiving GPS signals directly from satellites; instead, the CN50
receives GPS signals and information provided by the cellular network.
Even when the CN50 can receive a satellite signal, Assisted GPS can
improve position accuracy and reduce the time to determine initial
position (Time-To-First-Fix). Check with your cell phone carrier for
availability and pricing for Assisted GPS service.
Qualcomm's gpsOneXTRA Assistance technology provides enhanced
operation for Standalone-GPS. This option enables the CN50 to
automatically download a small assistance data file from the XTRA
servers through a brief internet access session.
To improve GPS performance:
1 Tap Start > Settings > System (tab) > GPS Settings.
2 Tap Menu > Download Assistance File to download a small
assistance data file.
3 Select Improve Accuracy and choose an operating mode.
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