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Motorola Oncore UT+ GPS Receiver

Oncore UT+ GPS Receiver

This product is no longer available.

Developed and optimized specifically for precise timing applications.


  • 8-channel parallel receiver
  • Time RAIM
  • automatic site survey
  • industry-leading jamming immunity
  • 1-pulse-per-second (1PPS) or 100-pulse-per-second (100PPS) output (50ns accuracy)

Motorola Model Number: R5222U111X with right angle OSX(MCX) antenna connector and on-board Lithium battery. See the UT+ Engineering Notes (243KB PDF) for more technical details.

Ordering Information

Sorry, Used Oncore UT+ GPS is no longer available

Warranty - TAPR will provide replacement units for dead on arrival (DOA) units that are promptly reported by the purchaser within 60 days after TAPR ships.

Please note: This unit does not come with an antenna and must be purchased as a separate item. This is not an enclosed/sealed unit. It is assumed that the purchasers will be installing the unit in another enclosure for normal and experimental operations.


The Motorola UT+ Oncore is a popular GPS receiver for high accuracy timing applications.  The UT+ may be used in the W3IWI/TAPR Totally Accurate Clock 2 kit or Brooks Shera's, W5OJM, GPS-Controlled Frequency Standard featured in the July 1998 issue of QST.

The UT+ Oncore is not suitable for general GPS uses, such as APRS, that require NMEA output.  The output of the UT+ Oncore is in Motorola Binary Format.

McKinney Technology VP/UT+/GT+ Interface board

Recommend antennas for the UT+ Oncore:

Links to the Motorola GPS Products Web Site

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