THOMSON Amethyst III, User Manual, Page: 44 / 306

Chapter 2 ’Installation and Startup’ — Mounting in Rack
44 Amethyst III DTV Smart Switch
User Manual

If the rack is positioned on a pressurized floor, it is possible to
stack Amethyst III or other 1RU equipment in groups of four,
each group being separated from another group by a space of
1RU (however, maintenance operations are facilitated if these
groups are limited to two Amethyst III or other 1RU equipment).
 In the absence of a pressurized floor, limit the group size to two
Amethyst III.
Failure to observe these installation requirements will directly
result in a deterioration in performance, reliability and service
life of equipment.
Cabling
It is essential to separate the power supply cables from the signal cables.
When facing the rear of the rack (as the device is connected via the rear
panel), the power supply cables must be guided to the right of the chassis
and the signal cables to the left.
EMC Ground
The EMC connection is required to ensure ground equipotentiality
between the different devices in the technical center (this earth is not a
protective earth for electric shock protection).
The rear panel features a tapped hole of the equipment to connect an
bonding strip (only one connection is required per device). This bonding
strip has to be fixed using the M4 screw supplied with the equipment.
The bonding strip must have a 6 mm² cross-section and be shorter than
500 mm.
Figure 2-2. EMC earth side panel
The rack EMC DC bus (to which the Amethyst III EMC strip is connected)
must be connected to the rack ground pin. This pin must be connected to
the safety ground.