12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 27
Product Overview
Typical System Configurations
The SSU-2000 is fully user-configurable and manageable through a software
interface. Modules can be inserted or removed from the SSU-2000 while the system
is operational without any degradation of output signals. Each module supports the
management of critical, major and minor alarms, locally and remotely. Output
modules and clock modules can be configured in redundant pairs, further increasing
system availability.
The SSU-2000 has extensive event detection, reporting, alarming, and storage
capabilities that permit monitoring of the system from external sites. Events are
defined as changes in conditions within the unit, or at the interfaces of the unit,
which may indicate abnormal operation or a change in the unit’s operational status.
For example, an event may be a parameter which exceeds a user-set threshold
(usually 2 thresholds are provided). Each event can be assigned by the user to one
of four modes, including IGNORE, REPORT, ALARM, or FAIL.
Typical System Configurations
The modular design of the SSU-2000 permits a great deal of flexibility in configuring
the system components for a variety of applications. Three of the more common
configurations include:
Time Signal Generator (TSG) configuration
Primary Reference Source (PRS) configuration
Monitor-only configuration
Timing Signal Generator (TSG) Configuration
The Timing Signal Generator (TSG) configuration shown in Figure 1-2 allows for
input of external references to which the Clock modules are phase- and frequency-
locked. This configuration allows for monitoring of several inputs, and for
synchronization of output signals.
Figure 1-2. SSU-2000 Configured as a TSG
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