94 TimeHub 5500 User’s Guide 097-55501-01 Revision M – January 2009
Chapter 3 Installing the TimeHub 5500
Installation Checklist
Electromagnetic Interference (EMI) Considerations
Electromagnetic interference (EMI) from one instrument can adversely affect the
operation of nearby equipment. To prevent the TimeHub 5500 from interfering with
other equipment, it must be installed and operated as described in the following
paragraphs.
All cables connected to the TimeHub 5500 should be shielded with “drain” wires
connected to the rack ground. Follow local procedures for shield grounding. The
screws on all cable shells must be securely fastened to their corresponding
connectors on the rear of the unit. While the unit is in operation, there must be a
module or blank panel installed in every slot. Also, the captive screws, located at the
top and bottom of the module panel, must be properly secured.
Ventilation Considerations
For proper ventilation, there should be at least 1 RU (1.75 inches, 4.4 cm) of free
space above and below the shelf.
Installation Checklist
To verify that each step in the installation procedure is complete, fill in the checklist
in Table 3-1 as you complete the steps. You can complete the procedures in any
order your site requires; the procedures in this Guide are in Symmetricom’s
suggested sequence.
Caution: To maintain EMC compliance, use only properly shielded
cabling on all telecom signal wiring, including I/O, clocks, and
Ethernet connections. Ensure that connections are appropriately
grounded.
Caution: To avoid excessive heat build-up resulting in equipment
damage, provide proper ventilation and cooling of the equipment.
Table 3-1. Installation Checklist
Step Procedure Initials
1
Unpacking the TimeHub 5500, on page 95
2
Rack Mounting the TimeHub 5500, on page 96
3
Configuring the Shelf as a Master or Remote, on page 101
4 Making Ground and Power Connections, on page 102
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