Installing The Ttl 8 Khz Clock Output Module; Operational Check; Primary And Secondary Distribution Slots - Symmetricom TSG-3800 Series User Manual

Installing the TTL 8 kHz Clock Output Module

The TTL 8 kHz Clock Output module is designed to operate in pairs. Insert one
module in a primary distribution slot; insert the other in the corresponding secondary
distribution slot.
TSG-3800 series.
Table 7-48. Primary and Secondary Distribution Slots
Model
3800/3800E 18, 20
19-inch Shelves
3800 23-inch 18, 20, 22
Shelf
3800X/3800EX 4, 6, 8, 10, 12, 14, 16, 18, 20
19-inch Shelves
3800 23-inch 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24
Shelf
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
Output Signal

Operational Check

With power applied to the shelf, install the TTL 8 kHz 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 8 kHz 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.
Note: The module indicators may take a few seconds after
installation to reach proper operating status.
12778474-002-2 Revision F – March 2004
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Table 7-48 lists the primary and secondary distribution slots in the
Primary Distribution Slots
Connections, on page 56, for more information.
TTL 8 kHz Clock Output Module
Secondary Distribution Slots
19,21
19, 21, 23
5, 7, 9, 11, 13, 15, 17, 19, 21
5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25
TSG-3800 User's Guide 273
Output Modules
Making