Microsemi / Symmetricom / TrueTime 560-5153 E1/T1 Synthesizer Interface Module
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Microsemi / Symmetricom / TrueTime 560-5153 E1/T1 Synthesizer Interface Module

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Stock # 67493-1
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Microsemi / Symmetricom / TrueTime XL-DC High-Precision GPS Synchronized Time and Frequency Receiver

  • Less than 40 ns rms Accuracy to UTC During Selective Availability (SA)
  • Better than 1x10-12 Frequency Accuracy
  • Versatile and Modular Architecture
  • Supports Many Different Output Options
  • 1 PPS Output


The Microsemi / Symmetricom / TrueTime XL-DC High-Precision GPS Synchronized Time and Frequency Receiver provides the highest degree of time and frequency accuracy available in a GPS timing receiver. Standard outputs include a 1 PPS, analog IRIG-B time code and serial I/O time strings. A major advantage of the XL-DC is its versatile and modular architecture. A wide range of time and frequency plug-in options allow the XL-DC to be customized for specific applications and easily upgraded at a later time.

TrueTime's proprietary multi-satellite ensembling techniques provides very stable and precise timing outputs. Timing accuracy is less than 40 nanoseconds rms to UTC even during Selective Availability (SA). This superior oscillator disciplining to GPS enables internal oscillator accuracy to better than 1x10-12. For applications requiring increased oscillator stability during GPS outages, the XL-DC can be upgraded to include ovenized quartz or rubidium oscillators.

The very modular backplane architecture supports multiple time and frequency output options to address specific needs. The standard model supports up to four singleheight plug-in modules. Using the optional 3.5" high chassis, the XL-DC can accommodate up to ten singleheight modules. These modules can be incorporated at any time and significantly increase the adaptability of the XL-DC to changing requirements

The option modules are a cost-effective way to create a very versatile clock to support different applications beyond those supported by the standard outputs. For example, adding the Network Time Server and Telecommunications modules allow the XL-DC to synchronize computer clocks across an Ethernet network as well as routers, multiplexers, switches and other telecommunications equipment that use T1 signals. Option modules can also increase signal distribution. Additional sinewave or time code modules can eliminate the need for other signal distribution chassis. The wide range of options lends itself well to configuring the XL-DC as the central time and frequency source for many applications commonly found in the laboratory, range, and enterprise environments

Product Family: XL-DC, XLDC, 560-5153

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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Microsemi / Symmetricom / TrueTime XL-DC High-Precision GPS Synchronized Time and Frequency Receiver

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