CE/EMC Compliant Integration
i-modul Modem 336 LL
Ethernet receive PCB tracks must provide a minimum width of 25 mil,
Ethernet transmit PCB tracks a minimum width of 100 mil (1 mil
≈
0.0254 mm). The PCB tracks must be routed parallel and have the same
length.
10.4
Antenna Connection (if equipped)
The antenna connection must be connected to ground and a ferrite ring
must be installed behind the ground connection (towards i-modul) to
increase the interference resistance against burst and ESD at the antenna
connection.
10.5
Further Recommendations
The required measures will mostly depend on the connections and the layout (es-
pecially of the ground surfaces and good ground connections) of the motherboard.
To save costs, some of the above mentioned capacitors or ferrite beads may be
omitted. However, they should be considered in the layout to be able to integrate it
without having to change the PCB, if the EMC tests show that these components
are necessary. For the Ethernet module, insert bridges instead of the ferrite beads,
while the ceramic capacitors remain unequipped.
10.6
Reference Documents
Our evaluation board may be helpful for designing your application. The evaluation
board allows to operate our embedded modules in a simple way. Moreover, you
find a wiring diagram as reference design in the evaluation board manual.
For information about the evaluation board, visit our website http://www.insys-
tec.de/en/en/demoboard or contact your sales partner or our technical customer
support via e-mail to [email protected].
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