STEPPII-55/56-LT H
ARDWARE
DESCRIPTION
V
ERSION
1.01
7.2 Interface B (SIM card interface Molex-91228-0002)
The figure below shows the SIM card reader interface of the STEPPII-55/56-LT.
Figure 12:
View of the SIM card interface
The SIM interface controls an internal small 3 V SIM card. This interface is fully
compliant with GSM 11.11 recommendations concerning SIM functions.
Note:
The SIM should not be removed, while the module is powered on. The SIM
must only be removed when the STEPPII-55/56-LT is shut down. To remove
the SIM card press the Eject button (see figure 12) then pull out the SIM
card holder.
Note:
The unit is not designed for use of single 5 V SIM cards. These cards will
generate an error which cannot be distinguished from a faulty SIM card
.
7.3 Interfaces C and D
The STEPPII-55/56-LT is fitted with two male SMB FAKRA connectors that accept a
wide variety of GSM/GPS antenna styles. One of them (right) (see figure below), is
provided for GSM RF connection. The GSM RF connector has an impedance of 50
Ω
.
A GSM antenna can be directly connected to this connector.
The other left-one is provided for GPS RF connection. The GPS RF connector (see
figure below) has an impedance of 50
Ω
. Active antennas have an integrated low-
noise amplifier. They can be directly connected to this connector. The integrated
low-noise amplifier of the antenna is internally supplied with the specified voltage.
FALCOM GmbH provides a combined GSM/GPS antenna, especially, for the STEPP
devices, the GSM antenna operates on four frequencies: GSM 850 MHz and DCS
1800/1900 MHz. The GPS antenna operates on 1575.42 MHz frequency. This antenna
is suitable for mounting, covertly if required, in various locations.
The order name of combined GSM/GPS antenna is:
FAL-ANT-5
In order to operate properly the GPS part, it is recommended the GPS
active antenna should not exceed 25 mA. The antenna voltage is supplied
internally. The GPS antenna is protected from reverse pole connection.
The figure below shows the position of GSM/GPS connectors.
This confidential document is a property of FALCOM and may not be copied or circulated without previous permission
.
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