Motorola Oncore GT User Manual

Quick start guide, Motorola oncore, Gt gps module for embedded oem

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GPS Module for Embedded OEM

A rugged and reliable eight-channel receiver, the Oncore™ GT provides position and velocity
data anywhere on Earth, at any time of day, in any weather. It also provides accurate time. A
one-pulse-per-second signal output is synchronized to UTC within a nominal accuracy of five
hundred nanoseconds—ideal for multi-site synchronization and time-distribution applications.


• 8-channel parallel receiver, 8 simultaneous satellite vehicles, L1 1575.42 MHz
• Code plus carrier tracking (carrier-aided tracking)
• Velocity: 1000 knots (515 m/s); > 1000 knots at altitudes < 60,000 ft.
• Position filtering
• Antenna current sense circuit
• Operates from +5 Vdc regulated power
• TTL interface to host equipment
• 3-dimensional positioning within 25 meters, SEP (without Selective Availability [SA])
• Latitude, longitude, height, velocity, heading, time, and satellite status information output either

continuously (once per second) or polled

• Differential GPS with Motorola binary corrections
• RTCM SC-104 differential GPS correction input on second comm port
• Motorola binary protocol at 9600 baud
• NMEA 0183 output at 4800 baud: GGA, GLL, GSA, GSV, RMC, VTG, ZDA sentences
• Velocity filtering
• 1PPS output (+/- 500 ns accuracy)
Time To First Fix (TTFF)

• < 15 s typical TTFF-hot (with current almanac, position, time and ephemeris)
• < 45 s typical TTFF-warm (with current almanac, position and time)
• < 90 s typical TTFF-cold

Oncore™ Operation Voltage and Current Ranges

5VDC Main power
Voltage: 4.75 V to 5.25 V
50 mV peak-to-peak ripple
Current: < 0.9 W at 5 V at 25°C with active antenna drawing 20 mA

BATTERY (Externally applied backup power)
Voltage: 2.5 V to 5.25 V
Current: 5 µA typical @ 2.5 V
100 µA typical @ 5.0 V

IMPORTANT NOTICE: The information presented in this document is presented “AS-IS” and
no warranty or guarantee is offered or implied. Nor is any liability assumed for any damages,
either actual or punitive incurred by the use or misuse of the information contained in this