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Intel ? TXN31011 Tri-rate LC SFF Optical Transceiver
4.0
Figure 4.
EMI and Grounding Scheme
Proper grounding is critical to ensure good EMI performance. There are two types of ground on the
TXN31011 Optical Transceiver housing as follows (see Figure 4 ):
? Chassis ground
? Signal ground
The LC nose and the front posts form the chassis ground. This ground is used to connect to the
Bezel/Chassis. In addition, there are four taps on the body of the TXN31011 Optical Transceiver,
and these taps are used to connect the signal ground. Separating the signal ground from the chassis
ground allows the chassis to take the static discharge. If both grounds are connected together, the
static charge can move directly to the signal ground. This sometimes affects proper operation of ICs
on the motherboard. The signal ground on the TXN31011 Optical Transceiver housing is connected
to the ground plane of PCB inside the TXN31011 Optical Transceiver.
Proper Grounding
LC noses
Chassis GND
Posts
Chassis
GND
Signal GND
Datasheet
Intel ? TXN31011 Tri-rate LC SFF Optical Transceiver
Order Number: 280050, Revision: 003
07 Feb 2005
11
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