Symmetricom Unveils New Options for Cs4000 Cesium Frequency Standard

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Demonstrated at SATELLITE 2006 — February 7-9, 2006 — full-featured cesium frequency provides multiple output configuration, unique web interface and color front panel.

Symmetricom, Inc. (NASDAQ: SYMM), a worldwide leader in precise time and frequency products and services, today unveiled a brand new Cs4000 Cesium Frequency Standard equipped with a new color front panel Graphical User Interface (GUI) and many new features. The Cs4000 is ideally suited for the stringent requirements of a wide array of applications, including test & measurement, military communications, satellite ground stations, military test ranges, television broadcast and many others needing a primary frequency reference. The Cs4000 II will be demonstrated at SATELLITE 2006 Conference & Exhibition, February 7 – 9, 2006 at the Washington Convention Center, in Washington, DC, Booth #248.

“The front panel graphical user interface and Ethernet connectivity allow for monitor and control functionality that is unrivaled in the industry,” commented Doug Lowrie, product marketing manager for Symmetricom. “The ability to have continual access to mission critical instrumentation is a major issue for our customers; the Ethernet interface on the Cs4000 will provide continual access to vital cesium operating parameters.”

The Cs4000 is a 3U rack mount master clock that provides stable and accurate Radio Frequency (RF) signals that are derived from an atomic resonance in the cesium atom. This resonance in the cesium atom serves as the international definition of the duration of the second. When the Cs4000's time is synchronized to a National Measurement Institute (such as the U.S. National Institute of Standards and Technology), it acts as a highly accurate master clock that provides signals in timing systems. The Cs4000 provides multiple standard outputs, optional outputs that can be user configured and an internal options area for custom specials. The front panel display and Ethernet interface provide a customer interface and ease of use capability unique for this style of instrument. It is the only cesium available with Ethernet connectivity for remote monitoring and easy to use menu driven front panel interface. The high performance CS4000 with its long-term stability can be used in time keeping applications at an optimal price point.

Advanced Cesium III digital technology is at the core of the Cs4000 and is a direct result of Symmetricom's ongoing research and development efforts which have led to performance improvements in long term stability and accuracy. The accuracy and stability achievable with this technology is commensurate with any cesium standard available in the world today.

SATELLITE 2006 Conference & Exhibition brings together military, commercial, broadcasting and consumer markets delivering valuable turnkey solutions and the best and most qualified networking opportunities in the industry. More than 6,750 attendees from more than 40 countries are planning to attend, searching for solutions to their day-to-day challenges. SATELLITE 2006 represents an unparalleled opportunity to reach the satellite community’s visionaries who are shaping the satellite industry. For more information, visit

For more information on the Cs4000 II, visit


The Cs4000 II will be shipping March 2006.

About Symmetricom, Inc.

As a worldwide leader in precise time and frequency products and services, Symmetricom provides “Perfect Timing” to customers around the world, including communication service providers, network equipment manufacturers, US Department of Defense (DOD), aerospace contractors, enterprises, governments and research facilities. Since 1985, the company’s timing, frequency and synchronization solutions have helped define the world’s standards, delivering precision, reliability and efficiency to wireless and wireline networks, instrumentation and testing applications and network time management. Deployed in more than 90 countries, instrumentation products include atomic clocks, cesium and rubidium standards, VME, VXI, crystal oscillators, Bus Timing, PCI cards and Global Positioning System (GPS) solutions for instrumentation applications, alphanumeric displays, as well as network time servers for Network Time Protocol (NTP) synchronization and time synchronization solutions. In 2002, Symmetricom acquired TrueTime and Datum, enhancing its position in the world time and frequency markets. Symmetricom is based in San Jose, Calif., with offices worldwide. For more information, visit

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Raychel Marcotte
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