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Mini-PCIe GPS-disciplined oscillator for mission-critical apps

13 Apr 2015

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Jackson Labs Technologies Inc. has rolled out what it boasts as the industry's first Mini-PCIe GPS-disciplined oscillator (GPSDO). The Mini-PCIe module supports nanosecond timing for NTP, SNTP, GPSD, PTP/1588 and other industry-standard applications and is geared for mission-critical financial transaction timing, and any other application that necessitate high-precision timing, frequency and position reference, indicated the company.

The Mini-PCIe frequency and timing module has an integrated 65-channel GPS receiver with WAAS, QZSS and SBAS support, filtered power supplies, and a software-disciplined ultra-stable crystal oscillator designed into an industry-standard Mini-PCIe form-factor. The Mini-PCIe module uses true analogue crystal disciplining for superior phase noise, Allan Deviation (ADEV) and jitter performance on its on-board 20MHz and 1PPS CMOS outputs.

The Mini-PCIe module claims to provide better than one part per billion (1ppb) frequency accuracy and better than 10ns timing accuracy on average in a Mini-PCIe form factor that can be integrated into servers, embedded PCs, tablets and notebooks, and can also be externally connected to any computer via a standard USB cable with the support of a standard Mini-PCIe to USB adaptor.

Mini-PCIe GPS-disciplined oscillator

The Mini-PCIe module includes a latest generation 65 channels GPS receiver with WAAS, EGNOS, MSAS and QZSS support with indoor-GPS reception capability. The unit is available with standard frequency choices such as 2.048MHz, 5MHz, 10MHz, 19.2MHz, 20MHz (nominal), 26MHz, 30.72MHz, 40MHz and others and provides a 1pps (pulse per second) output through the Mini PCIe connector as well as dedicated CMOS 1PPS and LOCK-OK outputs. The Mini-PCIe module also includes a synthesised CMOS frequency output that can generate one of seven selectable frequencies that are phase-locked to the crystal oscillator and can range from 2.048MHz to 90MHz.

The Mini-PCIe module provides better than 1E-012 (one part per trillion) frequency accuracy averaged over 24 hours with GPS lock, and provides better than 25ppb typical frequency accuracy over 24 hours in holdover (flywheel) mode when GPS signals are not available. It provides time and date information to the PC-internal clock with 25ppb/24Hrs typical accuracy during periods without GPS reception, allowing transaction time-stamping with sub microsecond accuracy over prolonged periods of time even without GPS reception.

The Mini-PCIe module provides a number of standard GPS NMEA serial output sentences on its integrated COM port for easy software integration and access to the position, time and velocity (PVT) data as well as oscillator lock and health status information. No software is required to operate the unit, making it as easy to use as plugging the module into a PC and monitoring the integrated LOCK-OK CMOS output to indicate the unit is ready. The Mini-PCIe module can also be plugged into industry-standard servers that do not have integrated Mini-PCIe slots by using a standard PCIe to Mini-PCIe adaptor card.

When integrated into a typical PC, the Mini-PCIe modules' internal oscillator has an exceptionally low spur and phase noise performance of -92dBc/Hz at 10Hz offset and a noise floor of less than -155dBc/Hz allowing the unit to directly control RF transceivers as well as baseband processors without any additional phase noise or spur filtering being required.

Mini-PCIe GPSDO module samples ship from stock, and are priced at $220 each.




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