Installing The Three-Port Input Module; Making Signal Connections; Operational Check - Symmetricom TSG-3800 Series User Manual

Input Modules
Three-Port Input Module

Installing the Three-Port Input Module

The Three-Port Input module can be installed in slots 1 through 4 of the TSG-3800
main shelf. The slot determines the priority level of the input signal; see
Location and Keyed

Making Signal Connections

Each Input module slot in the TSG-3800 main shelf has a corresponding input
connector on the rear panel. Locate the connector on the rear panel that
corresponds to the slot in which the Single-Port Input module is installed, then
connect the external reference signal as described in
Connections, on page 54.
The input signal connector is a set of wire-wrap pins or a DB-9 connector. For the
wire-wrap connector, the shield of the input cable is connected to Pin 1, ground
(GND), which is connected to Frame Ground (FG). Pins 2 and 3, labeled T1 (tip)
and R1 (ring), are the balanced reference input pins for the external reference
source. The remaining pins (4 and above) in this connector are not used by this
module.
The DB-9 connector completely shields the external reference from the source to
the input. On this connector, the Frame Ground connection is made at Pin 1. The
external reference is connected to Pin 2 (labeled T1) and to Pin 6 (labeled R1). The
remaining pins (pins 3, 4, 5, 7, 8, and 9) in this connector are not used by this
module.

Operational Check

Perform the following operational checks after installing the Three-Port Input
module in the main shelf. It is assumed that power has been connected to the shelf
and is turned on, and that there is a CPU module installed and functioning properly.
A proper external reference signal must be connected to the corresponding
connector on the rear panel of the main shelf. If used, the fault signal should also be
connected to the main shelf.
1. Verify that the POWER indicator is lit.
2. Verify the module is receiving the proper input signals by observing the
indicators. For locked operation, the indicators should be as described in
5-17.
166 TSG-3800 User's Guide
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Modules, on page 61.
Slot
Making Input Signal
12778474-002-2 Revision F – March 2004
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