12778474-002-2 Revision F – March 2004
TSG-3800 User’s Guide 143
Input Modules
Composite Clock Input Module
Installing the CC Input Module
The CC Input module can be installed in slots 1 through 4 of the TSG-3800 main
shelf. The slot determines the priority level of the input signal; see
Slot Location and
Keyed Modules
, on page 61.
Making Signal Connections
Each Input module slot in the TSG-3800 main shelf has a corresponding input
connector on the rear panel, Locate the connector on the rear panel that corresponds
to the slot in which the CC Input module is installed, then connect the external
reference signal as described in
Making Input Signal Connections
, on page 54.
Operational Check
Perform the following operational checks after installing the CC Input module in the
main shelf. It is assumed that power has been connected to the shelf and is turned
on, and that there is a CPU module installed and functioning properly. A proper
external reference signal must be connected to the corresponding connector on the
rear panel of the main shelf.
1. Verify that the POWER indicator is lit.
2. Verify that the module is receiving the proper CC input signals by observing the
indicators. For locked operation the indicators should appear as described in
Table 5-3
.
Caution:
To prevent ESD damage to the module, always observe the
precautions described in
Properly Handling the Modules
, on page 61.
Table 5-3. Indicator Status
Indicator Name
State
POWER
On
REF
On or Off
LOS
Off
FAULT
Off
Note:
The indicators may take a few seconds to reach proper
status after you insert the module.
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