Telit Wireless Solutions HE910-EU V2, Hardware User'S Manual

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
Install the antenna in a place covered by the GSM/WCDMA signal.

The Antenna shall be installed to provide a separation distance of at least 20 cm
from all persons and must not be co-located or operating in conjunction with any
other antenna or transmitter;

If the device antenna is located greater then 20cm from the human body and there
are no co-located transmitter then the Telit FCC/IC approvals can be re-used by
the end product.

If the device antenna is located less then 20cm from the human body or there are
no co-located transmitter then the additional FCC/IC testing may be required for
the end product (Telit FCC/IC approvals cannot be reused)

Antenna shall not be installed inside metal cases;

Antenna shall be installed also according Antenna manufacturer instructions.
The use of an active GPS/GNSS antenna is required to achieve better performance.
The module is provided with a Digital Output signal to enable the external LNA (pad R7).
Parameter Min Max
Output high level 1.35V 1.8V
Output low level 0V 0.45V
The use of combined RF/GPS/GNSS antenna is NOT recommended. This solution could
generate extremely poor GPS/GNSS reception and also the combined antenna requires
additional diplexer and adds a loss in the RF route.
In addition, the combination of antennas requires an additional diplexer, which adds
significant power losses in the RF path.
Using this type of antenna introduces at least 3dB of loss if compared to a circularly polarized
(CP) antenna. Having a spherical gain response instead of a hemispherical gain response
could aggravate the multipath behaviour & create poor position accuracy.