User Guide

7SMARTWITNESS AP1 USER GUIDE
When satellites don’t have line
of sight, cellular towers help
triangulate a vehicle’s location.
GPS
RECEPTION
IMPROVE YOUR SIGNAL
1. Activate your AP1 in an area
without large buildings.
2. The optimum operating
temperature for your vehicle’s
GPS is -10°C~50°C
3. When first using your AP1 or
turning it on after a period
(>3 days), allow more time to
recognize your current location.
4. This product supports
Assisted GPS.
RECEPTION MAY BE IMPAIRED:
1. If your vehicle has metallic elements on the windshields.
2. If you install equipment generating electromagnetic waves that
interfere with the GPS signal in the vehicle (ex: Other GPS devices
like certain wireless activated alarms, MP3 and CD players and
camera alarms use GPS.)
3. On heavily overcast or cloudy days if the vehicle is:
• In a covered place such as under a bridge or raised roadway
• In a tunnel
• In an underground roadway or a parking area
• Inside a building or garage
• Surrounded by high-rise buildings
4. If GPS signal reception is poor. It may take longer to locate your
current position when the vehicle is moving than when it’s stationary.