Configuring The Ttl Clock Output Module; Installing The Ttl Clock Output Module; Primary And Secondary Distribution Slots - Symmetricom TSG-3800 Series User Manual

Configuring the TTL Clock Output Module

This section describes how to configure the TTL Clock Output module to meet the
requirements of your particular installation.
Caution: To prevent ESD damage to the module, always observe the
precautions described in
Selecting the Input Signals
The input signals can be selected by installing jumpers on TB1, TB2, TB3, TB4,
TB5, TB6, and TB7.
The options are as follows:
If the Frame Generator for the system is type 23476568-xxx-0 or
23478305-xxx-0, then the only option for this board is for TB1 through TB7 to be
set to Position C. Frequency selection (1544 or 2048 kHz) is done on the Frame
Generator. Refer to the appropriate Frame Generator.
If the Frame Generator for the system is type 23477799-xxx-0, then the
frequency selection can be done on this module as well as the Frame Generator.
TB2, TB4, TB5, TB6, TB7 are set to position C.
Set TB1 and TB3 to select the signal supplied by the Frame Generator as follows:
– Position C selects either 1544 or 2048 kHz, whichever was programmed
at the Frame Generator
– Position A selects 1544 kHz

Installing the TTL Clock Output Module

The RS-422 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 7-44. Primary and Secondary Distribution Slots
Model
3800/3800E 18, 20
19-inch Shelves
3800 23-inch Shelf 18, 20, 22
12778474-002-2 Revision F – March 2004
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Properly Handling the
Table 7-29 lists the primary and secondary distribution slots in the
Primary Distribution Slots
Output Modules
TTL Clock Output Module
Modules, on page 61.
Secondary Distribution Slots
19,21
19, 21, 23
TSG-3800 User's Guide 267