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GNSS Disciplined Oscillator Modules With OCXOs and Atomic Clocks
GNSS and GPS Disciplined Modules
MD-175
GNSS High Stability
Our fully integrated, low-noise GNSS disciplined module is available in a compact, surface-mount 40 × 50 mm footprint. It has an embedded GPS- and GLONASS-compatible 34-channel receiver and provides a 10 MHz sinewave and 1pps HCMOS output. An onboard OCXO provides stability in the unlocked mode.
MD-178
GNSS Low Phase Noise
This GNSS disciplined oscillator module comes in a compact, surface mount 25 × 20 mm package. It has an embedded GPS- and GLONASS-compatible 26-channel receiver and provides a 10 MHz and 1 pps HCMOS output. The internal reference oscillator is an ultra-stable OCXO.
MD-013
GNSS High Stability
The MD-013 is a standard platform module that provides 1 pps TTL, 10 MHz sinewave and 10 MHz square-wave outputs that are disciplined to an external 1 pps reference. The internal reference oscillator is an ultra-stable OCXO.
MD-015
Atomic Clock Stability
The MD-015 offers atomic stability and accuracy and uses a Chip Scale Atomic Clock (CSAC) or Miniature Atomic Clock (MAC-D) as the reference clock to provide optimal holdover time. This is achieved using algorithms that correct for temperature change, frequency aging and pressure sensitivity.
GNSS PPS Disciplined Oscillator Parametric Chart
Similar Devices
Precision Timing
Achieve nanosecond-level timing performance with our top-of-the-line crystal and atomic oscillators and corrective timing algorithms.
High Performance Holdover
We offer a wide selection of modules options to meet even the strictest application-specific holdover requirements.
Future Ready
Our modules are adaptable to changing hardware. We work with you on application-specific custom modules and box level solutions.
Markets and Applications
GNSSDOs provide the critical function of timing in a small, modular and customizable form factor that can operate as a stand-alone system or can be incorporated into a larger system. GNSSDOs are an excellent choice for PNT and holdover capability for several markets and applications.
Custom Solutions and Capabilities
Along with our standard off-the-shelf modules, we also offer custom capabilities. We can design, develop and adjust our modules and solutions to fit your specific application requirements. Our expertise in the manufacturing and design of crystal oscillators, atomic clocks, PNT systems and algorithms can be applied in a custom level solution. Our capabilities include:
- Multiple form factor—low Size, Weight, Power and Cost (SWaP-C), modules, box level, rackmount
- Ruggedization—high shock/vibration, board coatings and low g-sensitivity
- Multiple frequency outputs up to 100 MHz
- Ultra-low phase noise and Allan Deviation (ADEV)
- Multiple inputs
- Embedded receivers and oscillators
- Custom firmware
- GNSS, M-Code and alternate-constellation receivers available
- All standard, off-the-shelf modules that are CE/RoHS compliant
Software
To aid users with the integration of our GNSSDOs, we have spent years developing the Vectron® Serial Interface Protocol (VSIP) and Vectron Disciplined Oscillator Module Monitor 3 (VDOM3) software. These software suites help you get the most out of our GNSSDOs by enabling you to configure many settings on the GNSSDOs over the serial interface or using the GUI from the VDOM3 software. VDOM can also be used to track and report the status of the module and plot the performance of the oscillator whether you are using one of our OCXOs or atomic clocks. The software also allows you to monitor the satellites being used in the GNSS receiver. Our mature software can be customized for specific users and applications as well.
Vectron Serial Interface Protocol (VSIP)
- NMEA-0183-based protocol for commiocations with GNSSDO modules
- Enables a user to configure specific module settings, such as GNSS observables
- Can configure alarms, holdover settings, reference switching and other functions
Vectron Disciplined Oscillator Module (VDOM3) Monitor
- Software used to monitor GNSSDOs from either a PC or embedded system
- Can track and report module status, plot oscillator timing performance, track satellites and perform other functions
The Role of a GNSSDO
A GNSSDO is a timing device that uses a combination of a GNSS receiver with a high-quality oscillator to provide very accurate and reliable timing in a customizable form factor. Our GNSSDOs have nanosecond-level timing accuracy because of our advanced corrective aging and temperature algorithms that constantly correct the output of the oscillator to match the GNSS signal being received. Our GNSSDOs can be used as a timing reference for many applications; however, we also have the capability to output GNSS data and observables. GNSSDOs are often considered a timing subsystem and incorporated into larger PNT or communication systems. Our GNSSDOs can operate as a stand-alone system, or as a subsystem in a larger system design.
GNSS Holdover
In recent years, there has been a notable increase in the jamming of GNSS that poses significant challenges for applications reliant on precise timing and positioning. To mitigate these disruptions, our GNSSDOs are equipped with advanced holdover capabilities to provide continued accuracy even during GNSS signal loss. This is achieved through our sophisticated disciplining holdover algorithms and the integration of high-performance oscillators. Our solutions include OCXOs and state-of-the-art atomic clocks, such as the Chip Scale Atomic Clock (CSAC) and the Miniature Atomic Clock (MAC). Notably, the MAC boasts an impressive 48-hour holdover capability with a precision of 500 nanoseconds, providing exceptional stability and reliability in the face of GNSS jamming.
Additional Oscillator Products Acquired from Vectron®
With the acquisition of Vectron, we offer a more comprehensive portfolio of oscillator technologies, services and solutions so you can build more reliable systems supporting today’s precise timing standards. These solutions include OCXOs, TCXOs, VCXOs, VCSOs, GNSS-DOs, high-reliability crystals and high-reliability space and defense products.