Tsg-3800 Expansion Shelves; Description - Symmetricom TSG-3800 Series User Manual

Installing the TSG-3800

TSG-3800 Expansion Shelves

TSG-3800 Expansion Shelves
This section describes the available expansion shelves and covers the installation
and initial testing of the TSG-3800X 19-inch shelf, the TSG-3800X 23-inch shelf,
and the TSG-3800EX 19-inch shelf. Unless otherwise noted, all units are referred to
as the TSG-3800X.

Description

The Expansion shelf provides additional signal distribution for the TSG-3800 series.
The TSG-3800X is an aluminum chassis equipped with card guide slots for plug-in
modules. The rear of the Main shelf provides connections for input, power, and
output signals. The Main shelf performs all logic and control functions. Timing and
monitor signals transfer between shelves through an interconnecting cable
assembly.
Note: When you install an expansion shelf, note that the maximum
length of cable available for connecting the main shelf to the
expansion shelf is six feet (1.8 m).
Output Modules
The TSG-3800X 19-inch shelf and the TSG-3800EX 19-inch shelf accepts up to 18
Output modules (in nine redundant pairs) providing 180 outputs (20 outputs per
module pair). Output signals are on nine 50-pin connectors located on the rear
panel. Figure 2-13
23-inch shelf can contain two additional pairs of Output modules with 40 additional
outputs, for a total of 220 outputs.
shelf, and Figure 2-15
Timing Insertion Modules
The TSG-3800EX may also be used to house Timing Insertion modules (TIMs). A
TIM may be inserted in one slot of any output pair and the TIM Bypass Relay
assembly in the adjacent slot. Timing signals for the TIM are provided by the
TSG-3800 Main shelf. Input and Output connections for the TIM are on the 50-pin
connectors located on the rear panel of the Expansion shelf. For more information,
refer to Timing Insertion
Expansion Shelf Power Monitor
An optional module, the Expansion Shelf Power Monitor, allows for independently
reporting power loss alarm conditions. This plug-in module:
Provides visual indication of A and B power
Provides form "C" alarm relay closures upon power loss (Major alarm for loss of
A and B power; Minor alarm for loss of A or B power)
64 TSG-3800 User's Guide
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illustrates the TSG-3800X 19-inch shelf. The TSG-3800X
Figure 2-14
illustrates the TSG-3800EX 19-inch shelf.
Module, on page 279.
illustrates the TSG-3800X 23-inch
12778474-002-2 Revision F – March 2004