DCD 523 Digital Clock
Distributor Network Synchronization System
(w/ Dual Rubidium Oscillators)
Telecom Solutions DCD-LPR Digital Clock Distributor
Local Primary Reference GPS Receiver
Telecom Solutions DCD-LPR-G
Optic Fiber GPS Receiver Antenna
Words from the Seller:
This is perhaps the finest network timing system available on the market
today. The outstanding performance comes from applying state of the art
technology and innovation design to every aspect of the system. First, the
DCD-523 has dual rubidium oscillators for state of the art short term timing
stability and superior holdover. Secondly, add the unprecedented long term
performance of GPS tracking with the GT1 GPS Module...but GPS is only as
good as its signal. Third, it is the innovative antenna design which places
the receiver front end in the antenna eliminating transmission line losses.
The antenna then sends the timing signal over optic fiber to the main
receiver. since Optic fiber lines have minimal loss, the approach allow
virtually unlimited antenna placement with no performance penalty. Combined
with the systems superior build quality and other innovations and you have
truly the best system on the market!
DCD 523 Digital
The DCD-523 is a
SYNC AND TIMING distribution system that provides the accurate clock
references needed throughout your network to assure reliable
synchronization.The DCD-523 platform addresses timing applications from
Stratum 1 to Stratum 3. Its system architecture offers the enhanced
reliability of a fault-tolerant network to address all existing and future
Modular design provides optimum
flexibility. For example, Primary Reference Clock (PRC) ST1 applications are
provided by adding any of the TimeSourceฎ products, or the DCD-LPR (Local
Primary Reference) system to the input of the DCD-523 Multi-Reference
Or, for slave clock applications,
the DCD-523 can be equipped with a variety of clocks, including the
ST2E,TNC, and ST3E, with outputs in any timing signal format.
The DCD-523 is backwards compatible
with most existing DCD cards.The user can migrate to the DCD-523 and
preserve existing quality.
Management of the system is
possible via the Version 5 cards. Inputs and outputs to and from the system
can be provisioned, alarms and status can be retrieved, and performance data
collected can be downloaded to analyze network performance. SSM messaging is
supported by the Version 5 cards.
PDF Specs For The DCD 523
* (1) GT1 GPS Timing
Interface T1 Card: <<(This provides enhanced GPS tracking of the rebidium
DCD-LPR/C is a front-end primary reference source used with the DCD timing
platform for synchronizing digital telecommunications networks, and is fully
compliant with CE mark requirements.
The DCD-LPR/C can provide the
Primary Reference Source (PRS) required at any key network node, independent
of land-line timing distribution. Using readily available radio disseminated
services, such as GPS (Global Positioning System), the DCD-LPR/C generates
E1 clocking signals which exceed ITU, ANSI and Bellcore requirements for PRS
accuracy and stability.
This creates a more survivable
network architecture, in which network maintenance and administration are
reduced, while performance, reliability, and services are enhanced.
The DCD-LPR/C employs an
integrated, roof-mounted GPS antenna and Timing Receiver (GTR). The GTR uses
an all-in-view method to ensemble up to six GPS satellite signals with a
dynamic averaging technique that mitigrates the effects of Selective
Availability (SA). The UTC timing from the GTR is then passed to the GPS
Timing Interface (GTI) card in the DCD-LPR/C shelf.
The LCD messages on the front panel
of the GTI indicate the current performance of the card or any required
The DCD-LPR/C system also ensembles
the highly stable resonator component from the dual DCD rubidium clocks. A
disciplined time-scale is then generated, using the ensemble of the DCD-series
clocks steered by the UTC accuracy of GPS timing, and clocks the ouput as a
E1 signal format.
The E1 signal becomes the PRS
signal to the SSU (Synchronisation Supply Unit) or BITS (Building Integrated
Timing Supply) for office clock distribution.
Existing DCD sites can be
cost-effectively upgraded to PRC performance with the DCD-LPR/C. This
upgrade is built on the use of existing DCD plug-in sets.
Used with the Multi-Reference
Controller (MRC) card in a DCD-500 system, the GTI outputs are used in a
sophisticated majority scheme that qualifies each input against the other
for further enhanced PRC capability and primary reference management