Output Modules
TTL Clock Output Module
268
TSG-3800 User’s Guide
12778474-002-2 Revision F – March 2004
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 TTL 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 TTL 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.
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.
Table 7-44. Primary and Secondary Distribution Slots (Continued)
Model
Primary Distribution Slots
Secondary Distribution Slots
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