Cisco uBR-3x10 Hardware Installation And Cabling Manual page 93

Chapter 5 Cabling the RF Switch With the Cisco uBR7246VXR CMTS
Installing the Header Blocks on the Cisco uBR 3x10 RF Switch
This section describes attaching the header blocks to the RF switch.
The RF cables are connected to the CMTS, PROTECT, and CABLE PLANT portions of the
Cisco uBR 3x10 RF Switch using the header blocks. Header blocks are installed on the RF switch at the
following locations:
•
•
•
Equipment
•
•
To install header blocks, complete the following steps.
With the beveled edge of the header block at the top, line up the two alignment pins on the header block
Step 1
with the two holes corresponding to the RF connector group under the CMTS, PROTECT, or CABLE
PLANT section of the Cisco uBR 3x10 RF Switch.
Press the header block into place, using equal pressure on both the upper and lower portions of the header
Step 2
block.
Use a flat-blade screwdriver to tighten the captive installation screws at both the top and bottom of the
Step 3
header block to prevent accidental disconnections.
Tighten the header blocks to the Cisco uBR 3x10 RF Switch only after gently pulling on the cables to
Note
be sure that they are firmly seated in the header block.
Do not overtighten the captive screws. We recommend that you tighten the screws to 5 to 7 inch-pounds
Caution
(0.5647 to 0.7909 nm)
Figure 5-5
Alignment
OL-1984-06
CMTS—RF cables connect to working cable interface line cards and to IF-to-RF upconverters.
PROTECT—RF cables connect to protecting cable interface line cards
CABLE PLANT—RF cables connect to the cable headend or hub.
36 header blocks
Flat-blade screwdriver
Header Block Description
pins
connectors
Installing the Header Blocks on the Cisco uBR 3x10 RF Switch
Header block (top)
Bevel
Screws
MCX
Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
5-7