Motorola M12 Oncore User's Guide download pdf (Page 11)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

M12+ ONCORE RECEIVER TECHNICAL CHARACTERISTICS

Table 3.2: Oncore Technical Characteristics – M12+ Model

Revision 5.0 08/30/02

3.11

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 15s typical TTFF-hot (with current almanac,position, time and ephemeris)

(Time To First Fix,TTFF) 40s typical TTFF-warm (with current almanac, position,and time)

60s typical 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

< 500nS with SA on

(1 Pulse per second,1 PPS)

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

NMEA 0183 at 4800 baud (GGA,GLL, GSV, RMC, VTG, ZDA)

Software selectable output rate (continuous or poll)

TTL interface (0 to 3 V)

Second COM port for RTCM input

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 DGPS corrections at 9600 baud on COM port one

RTCM SC-104 input Type 1 and Type 9 messages for DGPS

at 2400, 4800 or 9600 baud on COM port two

NMEA 0138 output

Inverse DGPS support

Optional Features Lithium battery backup

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

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