Announces Digital Broadcasting Sync Source
Other Topics: Optical
Networking, IP Based TV Systems
November 14, 2007
High Performance DVB Sync Source Enables Highly Reliable Delivery
of Video and Audio Content to the End User
San Joe, CA -- Symmetricom, Inc. (NASDAQ: SYMM), a worldwide leader
in precise time and frequency technologies that accelerate the
deployment and enable the management of next generation networks,
today announced the 4370A DVB Sync Source, a high performance,
flexible and highly reliable timing system designed for Single
Frequency Network (SFN) synchronization for Digital Video
Broadcasting (DVB) and Digital Audio Broadcasting (DAB)
applications. DVB/DAB require a precision time and frequency
reference to synchronize transmitters across multiple locations.
Without synchronization, networks are
not able to reliably deliver video and audio content to the end
"Symmetricom now offers broadcasters deploying Single Frequency
Networks for digital terrestrial and mobile video networks the
necessary reliability and Quality of Service (QoS), minimizing
network downtime," commented Doug Lowrie, product marketing manager
at Symmetricom. "The 4370A DVB Sync Source is a highly flexible,
reliable time and frequency source supporting evolving network
requirements for broadcasters."
The 4370A receives reference-timing signals from Global Positioning
System (GPS), fiber optic and E1 inputs and translates them to
generate the output signals. In case of GPS loss, the 4370A
automatically switches to and locks to the auxiliary fiber optic or
2 MHz, 2Mbit/sec input to continually provide outputs that are
traceable to a primary reference clock. The 4370A can also be linked
together via an optional fiber optic transceiver on the input,
providing a double redundant system with no signal point of failure
allowing the utmost in system reliability. Redundancy is a key
requirement because without GPS based sync, transmission is lost and
QoS is degraded.
"The main concern of our broadcast customers is maintaining the
reliability of their networks," commented Chris Roberts, European
business development manager at Chronos Technology Ltd, a
Symmetricom distributor operating in Sweden, Denmark and the United
Kingdom. "Through its remote management, fiber distribution and hot
swappable output modules, the DVB Sync Source offers redundancy
features that are necessary to maintain a reliable broadcast
The 4370A DVB Sync Source provides many key features, supporting
evolving network topologies and minimizing network downtime for
- Redundant, Hot Swappable Design
- Hot swappable power supplies and up to six (6) hot swap output
modules providing 24 total outputs in a single 1U chassis; Option
to configure two sync sources is available - one as primary and
one as backup - for automatic switchover if the primary fails.
- Remote Monitoring and Control -
Remote configuration and monitoring using SNMP allows for
network-wide visibility, monitoring alarms and diagnosing errors
quickly, ensuring robust network operation.
- High Precision, High Reliability
- Robust DVB synchronization calls for key attributes in the SFN's
timing reference. The DVB Sync Source addresses each of these
attributes within the core architecture and option modules.
- Low Phase Noise - The timing
source utilized to generate a signal on a channel can contribute
to noise on that channel which can interfere with clear reception.
Low phase noise in the timing source reduces that likelihood.
The DVB Sync Source will be shipping in December.
For more information, visit: http://www.symmttm.com/pr/4370A/.
About Symmetricom, Inc.
As a worldwide leader in precise time and frequency products and
services, Symmetricom provides "Perfect Timing" to customers around
the world. Since 1985, the company's solutions have helped define
the world's time and frequency standards, delivering precision,
reliability and efficiency to wireline and wireless networks,
instrumentation and testing applications and network time
management. Deployed in more than 90 countries, the company's
synchronization solutions include primary reference sources,
building integrated timing supplies (BITS), GPS timing receivers,
time and frequency distribution systems, network time servers and
Symmetricom also incorporates technologies including Universal
Timing Interface (UTI), Network Time Protocol (NTP), Precision Time
Protocol (IEEE 1588), and others supporting the world's migration to
Next Generation Networks (NGN). Symmetricom is based in San Jose,
Calif., with offices worldwide. For more information, visit