Installation Manual

1027145–0001 Revision D 6–26 Installing indoor hub equipment Hub installation
A channel and control module (CCM) must be installed in the top
slot (slot 1) of the IDU chassis. For an HT IDU, the CCM must be
a CCM HT (HNS 1027181–0001), as shown in figure 6-15.
Figure 6-15 CCM HT
Liquid crystal
display (LCD)
Control pushbuttons
(for LCD)
IFL
interface
Reference
clock
LAN
interface
Maintenance
port
hb062
TM
BROADBAND
ENTER
HUB CCM
Auxiliary IF
port
The CCM supports the interface modules installed in the IDU
chassis by performing control, bus, upconversion, and
downconversion functions. These modules—SSIs—are described
in section 6.5.
To install the CCM HT, follow the steps below:
CAUTION
Always wear a new or recently tested
electrostatic discharge (ESD) wrist strap
(figure 6-16) when handling circuit
modules. Failure to use a wrist strap may
result in damage to components.
Figure 6-16 ESD wrist strap
TM
BROADBAND
ENTER
hb061
Wrist
strap
Connect to IDU chassis
ground terminal.
6.4
Installing the CCM