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APRS/GPS:

TAPR Motorola ONCORE VP Continous Group Purchase!

This product is no longer available.

Motorola discontinued the VP in August of 1999.


VP ONCORE™ GPS ReceiverVP ONCORE™ GPS Receiver By design, the ONCORE™ family of GPS receivers is built with the same underlying receiver architecture, each incorporating the same Motorola GPS custom I.C.'s (Integrated Circuits), the same Motorola GPS receiver software and the same Motorola MPU (Micro Processor Unit) processing power. Add reliability, responsive support and the long-term commitment you've come to expect from Motorola, and you understand why ONCORE™ is the quality choice.

These units will be useful with current APRS software and the TAC-2 (Totally Accurate Clock) kit designed by Tom Clark, W3IWI.

As well as the MIC-E kit for APRS tracking.


TAPR Power Supplies for GPS Receivers

Read about the recommended TAPR power supply and RS-232 interfaces for the Motorola ONCORE™ VP.

Documentation

General Characteristics
Receiver Architecture
  • 8 channel
  • L1 1575.42 MHz
  • C/A code (1.023 MHz chip rate)
  • Code plus carrier tracking (carrier aided tracking)
  • Tracking Capability
  • 8 simultaneous satellite vehicles
  • Performance Characteristics
    Dynamics
  • Velocity: 1000 knots(515 m/s) > 1000 knots at altitudes < 60,000ft.
  • Acceleration: 4 g
  • Jerk: 5 m/s3
  • Vibration: 7.7G per Military Standard 810E
  • Acquisition Time (Time To First Fix,TTFF)
  • 20 sec. typical TTFF hh (with current almanac, position, time and ephemeris)
  • 45 sec. typical TTFF (with current almanac, position and time)
  • 2.5 sec. typical reacquire
  • Positioning Accuracy
  • Less than 25 meters, SEP (without SA) [DoD may invoke Selective Availability (SA), potentially degrading accuracy to 100 m (2dRMS)]
  • DGPS accuracy 1-5 meters typical
  • Timing Accuracy(1 pulse Per Second, 1 PPS)
  • 130 nanosec. observed (1 to) with SA on
  • In position hold mode, <50 nanosec. observed (1 to) with SA on
  • Datums
  • 49 std. datums, 2 user defined, default WGS-84
  • Serial Communication
    Output Messages
  • Latitude, longitude, height, velocity, heading, time, satellite tracking status (Motorola Binary Protocol)
  • NMEA-0183 Version 2.00 (selected formats) available
  • Software selectable output rate (Continuous or Poll)
  • Broad list of command/control messages
  • TTL interface
  • Electrical Caharacteristics
    Power Requirements
  • 5±0.25 Vdc 50 mVp-p ripple (max)
  • Power Consumption
  • 1.1 W @ 5V
  • Physical Characteristics
    Dimensions
  • Receiver 2.00 x 3.25 x 0.64 in. [50.8 x 82.6 x 16.3 mm]
  • Weight
  • Receiver 1.8 oz. (51g)
  • Connectors
  • Data/Power: 10 pin (2x5) unshrouded header on 0.100" centers
  • RF: Right Angle MCX (subminiature snap-on)
  • Environmental Characteristics
    Operating Temperature
  • Receiver Module -30ºC to +85ºC
  • Humidity
  • 95% noncondensing +30ºC to +60ºC
  • Altitude
  • 60,000 ft.(18km)(max)
  • > 60.000 ft.(18 km) for velocities <1000 knots
  • Miscellaneous
    Optional features
  • 1 PPS timing output
  • Raw measurement data
  • On board LNA option for use with passive antenna
  • DGPS
  • Differential GPS-standard software feature
  • RTCM-104 format (remote input)
  • Motorola custom format (master output and remote input)
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