Motorola M12 Oncore User's Guide download pdf (Page 12)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

M12+ TIMER ONCORE RECEIVER TECHNICAL CHARACTERISTICS

Table 3.2: Oncore Technical Characteristics – M12+ Timer Model

Revision 5.0 08/30/02

3.12

GENERAL Receiver Architecture 12 channel

CHARACTERISTICS

L1 1575.42 MHz

C/A code (1.023 MHz chip rate)

Code plus carrier tracking (carrier aided tracking)

Tracking Capability 12 simultaneous satellite vehicles

PERFORMANCE Dynamics Velocity: 1000 knots (515 m/s) > 1000 knots (515 m/s); at

CHARACTERISTICS

altitudes < 60,000 ft.(18,000m)

Acceleration: 4g

Jerk: 5 m/s

Vibration: 7.7G per Military Standard 810E

Acquisition Time 200s TTFF-hot (with current almanac,position,time and ephemeris)

(Time To First Fix,TTFF) 50s TTFF-warm (with current almanac, position, and time)

25s TTFF-cold (No stored information)

(Tested at –30 to +85ºC) < 1.0s internal reacquisition (typical)

Positioning Accuracy 100 meters 2dRMS with SA as per DoD specification

Less than 25 m SEP without SA

Timing Accuracy Performance using clock granularity message*

(1 Pulse per second < 2nS 1 Sigma average

or, 100 PPS) < 6nS 6 Sigma average

Position hold mode active Performance not using clock granularity message*

< 10nS 1 Sigma average

< 20nS 6 Sigma average

Antenna Requirements Active antenna module powered by receiver module

18dB to 36dB external antenna gain measured at input to receiver

3 V or 5 V Antenna power provided via header connector

Datum WGS-84 Default

One user definable datum

SERIAL Output Messages Latitude,longitude, height, velocity,heading,time

COMMUNICATION

Motorola binary protocol at 9600 baud

Software selectable output rate (continuous or poll)

TTL interface (0 to 3 V)

ELECTRICAL Power Requirements 2.85 to 3.15 Vdc; 50 mVp-p ripple (max)

CHARACTERISTICS “Keep-Alive” BATT Power External 2.2 Vdc to 3.2 Vdc,5 uA typical @ 2.7 Vdc @ 25ºC

Power Consumption <185mW @ 3 V without antenna

PHYSICAL Dimensions 40.0 x 60.0 x 10.0 mm (1.57 x 2.36 x 0.39 in.)

CHARACTERISTICS Weight Receiver 25 g (0.9 oz.)

Active Antenna Module < 40 g

Connectors Data/power: 10 pin (2 x 5) unshrouded header on 0.050 in.

centers (available in right angle or straight configuration)

RF: right angle MMCX (subminiature snap-on)

Antenna to Receiver Single coaxial cable

Interconnection Antenna sense circuit

ENVIRONMENTAL Operating Temperature -40ºC to +85ºC

CHARACTERISTICS Storage Temperature -40ºC to +105ºC

Humidity 95% over dry bulb range of +38ºC to +85ºC

Altitude 18,000 m (60,000 ft.) maximum

> 18,000 m (60,000 ft.) for velocities

< 515 m/s (1000 knots)

MISCELLANEOUS Standard Features Motorola Binary Protocol

Position hold with automatic site survey

Clock Granularity Error Message

T-RAIM (Timing Receiver Autonomous

Integrity Monitoring)

Optional Features Lithium battery backup

NOTE All specifications typical and quoted at 25°C unless otherwise specified

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