GNSS timing modules offer accuracy of less than 20ns

27th November 2014

u-blox

Siobhan O'Gorman

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Datasheet

Capable of generating a precise reference clock with less than 20ns accuracy, the NEO-M8T and LEA-M8T precision timing modules have been released by u-blox. Enabling quick start-up even inside structures with limited sky-view, the receivers offer high sensitivity (-157dBm signal acquisition with assisted GNSS). The precise reference clock is derived from multi-GNSS including GPS, GLONASS, and BeiDou.

The NEO-M8T module is suitable for timing applications requiring low power consumption and a long battery life, such as geophones used for seismic field measurements. The modules, which meet industry requirements for reliability, accuracy and low power consumption, are multi-GNSS, pin compatible successors to the company's existing PPS timing modules. The NEO-M8T and LEA-M8T can also be used with the company’s GNSS frequency reference module, LEA M8F.

Enabling high integrity and reliability, the devices feature receiver autonomous integrity monitoring and alarms. Two time-pulse outputs are also provided and are configurable from once per minute up to 10MHz. RAW data including carrier phase, code phase and pseudo-ranges is output by the modules.

Time, according to any international standard including calibration of inter-constellation offsets, can be provided by the NEO-M8T and LEA-M8T. With as few as one single satellite in view, survey-in and single satellite timing features increase timing accuracy and timing availability. Reducing power consumption for battery-powered applications, the modules provide support for low duty cycle operation. This allows smaller batteries to be used, which results in cost savings.

Allowing ready migration from previous product generations, the M8T timing modules are delivered in u-blox’s LEA and NEO form-factors, which measure 17.0x22.4 and 12.2x16.0mm respectively and have a standardised pin-out. Facilitating easy upgrade, the LEA-M8T module is footprint compatible with existing LEA-5T/6T designs. To reduce the time to first fix and deliver acquisition sensitivity, even on first installation before precise location or time is known, the timing products can optionally be used the company’s AssistNow or industry standard aiding data.

“These modules are the industry’s highest performance GNSS timing modules in terms of accuracy, reliability and power consumption,” said Thomas Nigg, Vice President of Product Marketing, u-blox, “The modules are suitable for mission-critical infrastructure systems including mobile communication networks, power generation and distribution systems and seismic measurements.”

u-blox will be exhibiting the NEO-M8T and LEA-M8T precision timing modules at the Small Cells Americas exhibition, which takes place from 1^st to 3^rd December 2015 in Dallas, Texas. The company will be based at stand number 28.