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Symmetricom’s 56000 is a versatile Data Rate
Clock (DRC) and Distribution System supporting
an extensive variety of input references,
oscillators, output frequencies, input/output
interface styles, powerful network based
management tools, and complete power
supply plans. The modular architecture supports
various clock rates and frequencies
required in today’s sophisticated communications
applications.
The 56000 backplane can accept 1, or 10 MHz;
IRIG B time code; and any TTL signal from
DC to 10Mbps. Multiple redundant external
frequency references can be applied to a hitless
switch (passive combiner) located on each
frequency synthesizer circuit card. The hitless
switch provides a glitch-free transition from
one input source to another, ensuring reliable
and disturbance-free outputs, even in the
event of failure of one of the input sources.
The frequency reference inputs can be
replaced or enhanced by an on-board oscillator
circuit card or an on-board GPS timing
receiver. The oscillators are disciplined to
either the input frequency or GPS. Using the
oscillators in combination with external
reference inputs provides various levels of
redundancy. The oscillators also add holdover
capability so that uninterrupted operation is
maintained in the event of total failure of the
reference input(s).
Model 56000 outputs can include distributed
or generated clock signals, frequencies,
Network Time Protocol, and IRIG B time code.
N.1 clock rate generation from 1Hz to 25MPPS
in 1PPS steps is available in addition to N.8
clock rate generation from 8 KPPS to 8.192
MPPS in 8KPPS steps. Also available is a
Telecommunications Interface that provides a
variety of outputs and alarms common in
today’s telecommunications applications. The
chassis is configured with front and rear plug-in
cards. The front panel plug-in circuit cards
perform the modular rate generation and
distribution functions and are hot swappable.
The rear panel interfaces are also implemented
using plug-in cards with a wide variety
of connector types and styles. Of the 21 card
KEY FEATURES
• Frequency Generator and Distribution
• Time Codes Generator and Distribution
• Up to 3 External Redundant References
• All Modules are Hot Swappable with
Easy Plug & Play Operation
• Completely Redundant System
• Monitoring Capability of All Inputs
and Outputs
• Network-Based Management
• Powerfull SNMP Interface
• User-Friendly HTML Interface
• 16 Module Slots with Up to 6
Independently Programmable Outputs
Per Module
• Copper and Optical Fiber Optics for
Inputs / Outputs
• Front LEDs Status Indicators on
All Modules
• External T1 Reference Input
MAJOR APPLICATIONS
• Communication Systems
• Encryption & Decryption
• Station Clock CDS10 & CDS20
Replacements
• Earth Station and Mobile Station SATCOM
• Distribution of Specialized Signals
• Secure Frequency Agile
• Any Applications Requiring Precise
E1/T1 Frequencies
56000
Modular Time & Frequency Distribution System
56000 Modular Time & Frequency Distribution System
TIMING, TEST & MEASUREMENT
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