EMC/ESD information
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Required connections
The system was developed in compliance with the ETSI Mesh Ground requirements.
This means EMC compliance and personnel safety can be achieved only if the system
is connected to a System-Reference Potential Plane (SRPP) at many places as
described in ETS 300 253 (see the figure below).
All peripheral equipment and its protective earth/ground must also be connected to the
SRPP by one or more fixed wires.
The EMC/ESD boundary is defined at subrack level. The principle is based on the
“Faraday Cage” theory. If there are covers, then the covers must be closed.
There is an ESP bonding point on the subrack (see
Figure 2-4, “ESP subrack bonding
). A grounded wrist strap with banana plug must be worn when opening
the subrack covers.
Circuit pack handling
The following
ESD instructions
must be observed when handling circuit packs:
•
Wear work garments made of 100% cotton to avoid electrostatic charging.
•
Touch the circuit packs at the edges or the insertion and removal facilities only.
•
Ensure that the rack is grounded.
•
Wear conductively connected wrist straps and connect them to the ESP subrack
bonding point (see figure below).
Figure 2-3 Grounding scheme
General information
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Lucent Technologies - Proprietary
See notice on first page
365-374-187
Issue 1, December 2005