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Precision GPS/GNSS based NTP Network Time Servers

Link to Brandywine Communications Website NFS220 10MHz Frequency Standard

Precision Time and Frequency Standards

Highly accurate, reliable low phase noise GNSS/GPS, IRIG and HaveQuick referenced clocks and frequency standards that provide a broad range of interface and time code options.

The units are widely used in high integrity installations worldwide.

A class leading range of ultra precision and accurate frequency standard references to meet the demanding timing needs of our global customer base. Our frequency standards use hydrogen, cesium, rubidium standards, and quartz oscillators to deliver the highest accuracy, stability and reliability for any environment needing a precise timing standard.

Our range of frequency standard products are used in telecommunications, navigation and targeting systems, radar systems, satellite command terminals, advanced communications and precision test and measurement applications.

These products are cost-efficient and compact, forming highly stable reference signal products for precision test and measurement applications.

The NFS-220 / NFS-220 PLUS units are precision time and frequency standards that use a high performance 16 channel GPS receiver to define a precise time standard and hence means to discipline a precision oscillator from which industry standard time and frequency signals are derived. This is supplemented by an automatic position-averaging feature that enables the best use of GPS when operating in a fixed location.

The units are designed for use in WI-FI, Wi-Max, satellite communications, telecommunications and military communication applications requiring exceptional stability and low phase noise.  Both units provide an array of front panel real-time status indicators with the NFS-220 Plus version also incorporating a high visibility, Time of Year Display in the front panel. An internal back up oscillator is continuously calibrated to GPS using an advanced algorithm, providing optimal frequency control of the oscillator, ensuring that the highest time and frequency accuracy is maintained if satellite tracking is lost.  

Base level units units provide a precision OCXO frequency standard, while TCXO and Rubidium oscillators are available to deliver a variety of price and performance options. A combination option employing a low noise OCXO phase locked to a rubidium is also available, offering the low noise characteristic of an OCXO with the long term stability of a rubidium.

The RG-21xx is a range of dual redundant reference frequency generators that use the Global Positioning System (GPS) to steer two internal low phase noise oven controlled crystal oscillators OCXO’s.  

Once these oscillators become locked to the GPS timing signal, their inherent stability characteristics ensure precise timing and accuracy is maintained, even in the event of temporary GPS signal loss. Each GPS Disciplined Module provides a set of 3 low phase noise 10 MHz sine waves, 1PPS and status/control signals to the user interface output rear panel.

If a failure or signal loss is sensed in one of the dual redundant modules, the unit will automatically switch outputs to the other GPS Disciplined Module to provide continuous service.

These outputs are accurate daily to 1 x 10-12 when slaved to an internal GPS tracking receiver’s time.

In addition to the dual GPS receivers and disciplined OCXOs, dual redundant hot swappable power supplies make the RG-21xx a sensible choice for high integrity installations such as military communications, telecommunications and satcom telecommunications, where accurate reference signal availability is essential.

The RTG-510 is a highly versatile, remotely controlled dual redundant master clock that will synchronize to almost any timing input reference signal, including GPS, IRIG A, B, E, G, Have Quick, NASA36, and simultaneously output IRIG A, B, E, G, H, HaveQuick, 1PPS, dual NTP and RS232 to your system.

The unit has a built-in GPS receiver and high visibility 9-digit time display as well as Dual hot swappable dual redundant power supplies. Units are supplied with an active GPS antenna and 100ft (30m) of cable.

The unit can be configured with either TCXO, OCXO (std) or rubidium oscillators to specifically suit the application, the RTG-510 has the ability to track incoming time code over +/- 200ppm to allow time code conversion from legacy tape playback systems.

An intuitive, easy to use web browser interface allows intuitive and secure configuration of the RTG-510 from any network connected computer, tablet or smart phone.

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RG-21xx - GPS Referenced Frequency Generator


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GPS based Time and Frequency Standards & Timing Signal Generators


NFS-220 Precision Time & Frequency Standard

RTG - 510 - Universal GPS & Timecode Reader

rtg510_ds18.pdfRG-21xx Frequency StandardRTG-510 Time Code Generator

The GPS Disciplined Oscillator Module is a small Commercial –Off-the-Shelf (COTS) GPSDO that has been designed to meet military requirements such as MIL-STD-188-164A.

At only 4.1” x 2.75” x 1” (104.0 x 70.0 x 26.0 mm) in size, the unit provides Stratum 1 performance.  The GPSDO supplies three isolated, low noise precision 10 MHz frequency reference signal outputs. Outputs are accurate to 1x10-12 when slaved to a timing supply from an internal GPS tracking receiver.

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GPSDO - GPS Disciplined 10MHz Reference

gpsdo_ds24.pdfGPS Disciplined Oscillator Module

The miniature GPS Disciplined Oscillator combines the power of our existing disciplined oscillators in a footprint the size of an OCXO.

Designed with interoperability in mind, the Miniature GPS Disciplined Oscillator meets military requirements such as MIL-STD-188-164A. The GPSDO supplies a low noise, precision 10 MHz frequency reference signal output. This output is accurate to 1x10-12 when slaved to a GPS source.

MGPSDO - Miniature GPS Disciplined 10MHz Reference


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Miniature GPS Disciplined Oscillator Module