Installation of the ACU
98-141779-G Chapter 3: Installation 3-23
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3.4 Installation of the ACU
The following sections describe the installation and grounding of the ACU.
3.4.1 To install the ACU
To install the ACU, do as follows:
1. Slide the ACU into a 1U space in a 19” rack.
2. Mount the screws in each side through the holes in the front and fasten the screws to
the rack. Make sure that the unit is mounted securely according to the requirements for
your 19” rack.
3. Connect all cables. See Interfaces of the ACU on page 4-1 for a description of the ACU
connectors.
For information about power source and power cable requirements see Power and start up
on page 5-1.
3.4.2 To ground the ACU
To ground the ACU do as follows:
1. Make sure that the grounding requirements are met. See the appendix Ground and RF
protection on page C-1 for details about grounding.
2. At the ACU end, connect the shield of the ADU cable to ship ground.
3. Make sure that the rack is connected to ship ground.
4. To ensure that the ACU is grounded – also if the ADU cable is disconnected from the
ACU, connect an extra ground wire from the rack to the ground stud on the ACU. This
ground wire must be a heavy wire or braid cable with a larger diameter than the coax
cable.
Make sure that the ventilation grills at the sides of the unit are not blocked.
Figure 3-21: Ground stud, ACU
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