Gemalto M2M GmbH EMS31-X Manuel D’Utilisation
Cinterion
®
EMS31-X Hardware Interface Description
2.3 Sample Application
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EMS31_US_HIO_v00.001
2018-09-21
Confidential / Preliminary
Page 17 of 33
2.3
Sample Application
shows a typical example of how to integrate an EMS31-X module with an application.
Usage of the various host interfaces depends on the desired features of the application.
Since the module is running at high RF power (antenna port peak power may vary up to
27dBm), it is designed to avoid self interference inside the module. Customer application de-
sign must also use the best practices to avoid self interference.
27dBm), it is designed to avoid self interference inside the module. Customer application de-
sign must also use the best practices to avoid self interference.
Generally, it is not recommended to have signals other than GND in direct proximity to the an-
tenna line or antenna itself. Antenna connection and the antenna itself must be kept as far as
possible from the sources of interference. High-impedance signals are recommended to be
kept as short as possible and away from the sources of interference. Decoupling of the supply
parts have to be carried out as recommended by the manufacturer. Failure to comply with these
generally applicable practices may result in poor, unreliable performance or problems with cer-
tification of the customer products.
tenna line or antenna itself. Antenna connection and the antenna itself must be kept as far as
possible from the sources of interference. High-impedance signals are recommended to be
kept as short as possible and away from the sources of interference. Decoupling of the supply
parts have to be carried out as recommended by the manufacturer. Failure to comply with these
generally applicable practices may result in poor, unreliable performance or problems with cer-
tification of the customer products.
While developing SMT applications it is strongly recommended to provide test points
for certain signals, i.e., lines to and from the module - for debug and/or test purposes.
The SMT application should allow for an easy access to these signals. For details on
how to implement test points see
for certain signals, i.e., lines to and from the module - for debug and/or test purposes.
The SMT application should allow for an easy access to these signals. For details on
how to implement test points see
.
The EMC measures are best practice recommendations. In fact, an adequate EMC strategy for
an individual application is very much determined by the overall layout and, especially, the po-
sition of components.
an individual application is very much determined by the overall layout and, especially, the po-
sition of components.
Note: EMS31-X is not intended for use with cables longer than 3m.
Disclaimer: No warranty, either stated or implied, is provided on the sample schematic diagram
shown in
shown in
and the information detailed in this section. As functionality and compliance
with national regulations depend to a great amount on the used electronic components and the
individual application layout manufacturers are required to ensure adequate design and oper-
ating safeguards for their products using EMS31-X module.
individual application layout manufacturers are required to ensure adequate design and oper-
ating safeguards for their products using EMS31-X module.