User's Manual

HE910 Hardware User Guide

1vv0300925 Rev.28 – 2015-06-24

7.3.11 Shielding

Shielding the RF circuitry generally is ineffective because the interference is getting into the GPS

antenna itself, the most sensitive portion of the RF path. The antenna cannot be shielded because then

it can’t receive the GPS signals.

There are two solutions, one is to move the antenna away from the source of interference or the second

is to shield the digital interference to prevent it from getting to the antenna.

7.3.12 GPS Antenna - Installation

• The HE910 due to its characteristics of sensitivity is capable to perform a Fix inside the

buildings. (In any case the sensitivity could be affected by the building characteristics i.e.

shielding).

• The Antenna must not be co-located or operating in conjunction with any other antenna or

transmitter.

• Antenna must not be installed inside metal cases.

• Antenna must be installed also according to the Antenna manufacturer instructions.