Motorola M12 Oncore User's Guide download pdf (Page 17)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

SL ONCORE RECEIVER TECHNICAL CHARACTERISTICS

Table 3.6: Oncore Technical Characteristics – SL Model

Receiver Architecture 8 parallel channel

L1 1575.42 MHz

C/A code (1.023 MHz chip rate)

Code plus carrier tracking (carrier aided tracking)

General

Characteristics

Tracking Capability 8 simultaneous satellite vehicles

Dynamics Velocity: 1000 knots (515 m/s); > 1000 knots at altitudes < 60,000 ft.

Acceleration: 4g

Jerk: 5 m/s

Vibration: 7.7G per Military Standard 810E

Acquisition Time

(Time To First Fix, TTFF)

(Tested at –30 to +85ºC)

< 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

< 1.0 s internal reacquisition (typical)

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

Less than 25 m SEP without SA

1-5 typical in differential mode

Timing Accuracy

(1 Pulse Per Second, 1 PPS)

< 500 ns (1 sigma) with SA on

Antenna Active micro strip patch antenna module

Performance

Characteristics

Datum WGS-84

One user definable datum

Serial

Communication

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

Motorola binary protocol at 9600 baud

NMEA at 4800 baud: GGA, GLL, GSA, GSV, RMC, VTG, ZDA

Software selectable output rate (continuous or poll)

TTL interface (0 to 5 V)

Second COM port for RTCM input

Power Requirements

5 ± 0.25 V; 50 mVp-p ripple (max)

“Keep-Alive” BATT Power External 2.5 Vdc to 5.25 Vdc; 5 uA typical @ 2.5 Vdc

Electrical

Characteristics

Power Consumption <0.9 W @ 5 Vdc with active antenna drawing 20 mA

Dimensions 40 x 80 x 12.2 mm (1.58 x 3.15 x 0.48 in.)

Weight 0.8 oz (22 g)

Connectors Data/power: 10 pin (2x5) unshrouded header on 0.050 in,. centers

RF: right angle OSX (subminiature snap-on)

Physical

Characteristics

Antenna to Receiver

Interconnection

Single coaxial cable

Antenna sense circuit

Operating Temperature -40ºC to +85ºC

Humidity 95% noncondensing +30ºC to +60ºC

Environmental

Characteristics

Altitude 60,000 ft. (18 km) (max.)

> 60,000 ft. (18 km) for velocities < 1000 knots

Standard Features Motorola DGPS input 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 0183 output

Velocity filtering (user controlled)

Inverse DGPS support

Miscellaneous

Optional Features Straight 10 pin data/power connector

Right angle SMB RF connector

Revision 5.0 08/30/02

3.17

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