Functional Overview; Functional Block Diagram; Block Diagram Of The 1-Port And 3-Port Ds1 Input Module; Ssu-2000 User's Guide 12713020-002-2 Revision D – April - Symmetricom SSU-2000 User Manual

Input Module Reference Data
1-Port and 3-Port DS1 Input Modules

Functional Overview

The DS1 Input module (1-port and 3-port versions) consists of a microcontroller and
firmware, SRAM for data storage, FLASH (contains the firmware), input signal ports,
and other support circuitry. The primary function of these modules is to perform
time-interval-measurements on Clock module A and Clock module B, using the
reference input signals. These measurements are used to adjust the frequency of
the oscillators on the two Clock modules.

Functional Block Diagram

A simplified block diagram of the 1- and 3-Port DS1 Input modules is shown in
Figure 7-3.
Figure 7-3.

Block Diagram of the 1-Port and 3-Port DS1 Input Module

154 SSU-2000 User's Guide 12713020-002-2 Revision D – April 2004