MANUAL P/N 900000019 REV G
5
1
Introduction
1.1 Scope of Section
Section 1 provides a general description of the Brandywine Communications
Multi-Channel Time Distribution Unit (Model TDU-310). The introduction is
divided into three parts, purpose of the equipment, physical and electrical
specification, and an identification of the external controls, indicators, and
connectors.
1.2 Purpose of Equipment
The TDU-310 accepts various inputs from external timing units, chooses
between these input sources, and buffers the outputs of the selected source to
the user. The selection is essentially a 2 x 1 switch for all inputs. The input
chosen is user-programmed to be either user selectable or automatic. Primary to
secondary switching is based on amplitude faults of the 1 PPS input, Time Code
1 input (HaveQuick), Time Code 2 input (50 bit/second BCD), and the state
change of the Time Fault Discrete input.
The TDU-310 is designed to provide dual redundant timing signals for use in
telecommunications, power utilities, and military communication applications.
