User's Manual

Table Of Contents
Table of Contents CMA-331-AEN Page 9
DRAFT
3 Unit Descriptions - Digital Path .................................................................................................................... 52
3.1 Digital Path Components ............................................................................................................................ 52
3.2 CEU (Centralized Ethernet Unit) ................................................................................................................. 53
3.2.1 CEM (Centralized Ethernet Module) ................................................................................................ 53
3.3 GEM (Gigabit Ethernet Module) .................................................................................................................. 55
3.4 GEU-S (Standalone Gigabit Ethernet Unit) ................................................................................................. 57
4 Installation Guidelines ................................................................................................................................. 58
4.1 Infrastructure Preparation ........................................................................................................................... 58
4.2 Installation Requirements ............................................................................................................................ 58
4.3 Safety Guidelines ........................................................................................................................................ 58
4.4 Rack Installation Guidelines ........................................................................................................................ 59
4.4.1 Rack Safety Instructions .................................................................................................................. 59
4.5 Power Requirements .................................................................................................................................. 60
4.5.1 Power Safety Instructions ................................................................................................................ 60
4.5.2 Types of Power Supplies ................................................................................................................. 60
4.5.3 Circuit Breakers ............................................................................................................................... 60
4.6 RF Coaxial Cable Guidelines ...................................................................................................................... 61
4.6.1 General Cable Installation Procedures ............................................................................................ 61
4.6.2 RF Rules ......................................................................................................................................... 61
4.6.3 Coax Cable Lengths and Losses ..................................................................................................... 62
4.7 Antenna Specifications and Guidelines ....................................................................................................... 63
4.7.1 Authorized Antennas and Required Specifications .......................................................................... 63
4.7.2 General Installation Guidelines ........................................................................................................ 63
4.8 Fiber Optic Requirements ........................................................................................................................... 64
4.8.1 Authorized Optic Cables .................................................................................................................. 64
4.8.2 Fiber Optic Rules ............................................................................................................................. 64
4.9 Power Safety Instructions ........................................................................................................................... 65
5 Installation RF Path Elements .................................................................................................................. 66
5.1 Headend Elements ..................................................................................................................................... 66
5.1.1 HEU Installation ............................................................................................................................... 67
5.1.1.1 Unpacking and Inspection ......................................................................................................... 67
5.1.1.2 Mounting the HEU Chassis ....................................................................................................... 69
5.1.1.3 Installing all Modules ................................................................................................................ 70