Output Modules
Composite Clock Output Module
240
TSG-3800 User’s Guide
12778474-002-2 Revision F – March 2004
Installing the Composite Clock Output Module
The Composite Clock Output module is designed to operate in pairs. Insert one
module in the primary distribution slot; insert the other in the secondary distribution
slot.
Table 7-21
lists the primary and secondary distribution slots in the TSG-3800
series.
Making Signal Connections
The output signals are available at the 50-pin connectors located on the rear panel
of the shelf. Outputs one through 20 are used by this module. Refer to
Making
Output Signal Connections
, on page 56, for more information.
Operational Check
With power applied to the shelf, install the Composite Clock Output module in the
appropriate slot and verify that the POWER indicator is lit. This indicates that the
module is receiving power and the module power supply is working.
Verify that the module is receiving the input signals by observing the A and B INPUT
FAULT indicators. For Locked operation and with two references applied, both
indicators should be off.
If at least one functional Frame Generator is installed, the OUTPUT FAULT indicator
should go out within eight seconds after the Composite Clock Output module is
installed. If it does not, an output may be bad or has an excessive load connected to
it (example, shorted). The indicator will remain on if there is no reference
connected, since there can be no outputs.
Table 7-26. Primary and Secondary Distribution Slots
Model
Primary Distribution Slots
Secondary Distribution Slots
3800/3800E
19-inch Shelves
18, 20
19,21
3800 23-inch
Shelf
18, 20, 22
19, 21, 23
3800X/3800EX
19-inch Shelves
4, 6, 8, 10, 12, 14, 16, 18, 20
5, 7, 9, 11, 13, 15, 17, 19, 21
3800X 23-inch
Shelf
4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24
5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25
Note:
The module indicators may take a few seconds after
installation to reach proper operating status.
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