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

Installing the Single-Port Input Module

The Single-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 One-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
5-14.
12778474-002-2 Revision F – March 2004
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Modules, on page 61.
Input Modules
Single-Port Input Module
Slot
Making Input Signal
Figure
TSG-3800 User's Guide 157