Motorola M12 Oncore User's Guide download pdf (Page 16)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

UT+ ONCORE RECEIVER TECHNICAL CHARACTERISTICS

Table 3.5: Oncore Technical Characteristics – UT Plus 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)

< 20 s typical TTFF-hot (with current almanac, position, time and

ephemeris)

< 50 s typical TTFF-warm (with current almanac, position, and time)

< 300 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

Timing Accuracy

(1 Pulse Per Second, 1 PPS)

Time RAIM algorithm

< 130 ns (1 sigma) with SA on

In position hold mode, < 50 ns (1 sigma) with SA on

Jamming Immunity Immune to the following CW Jamming signal levels measured at the input

to the Oncore Active Antenna when the receiver is in position-hold mode.

Values are typical.

-50 dBm @ 1570 MHz

-79 dBm @ 1575.42 MHz

-56 dBm @ 1580 MHz

Antenna Active micro strip patch antenna module

Performance

Characteristics

Datum WGS-84

Serial

Communication

Output Messages Latitude, longitude, height, velocity, heading, time (Motorola binary

protocol)

Software selectable output rate (continuous or poll)

TTL interface (0 to 5 V)

Power Requirements

5 ± 0.25 V; 50 mVp-p ripple (max)

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

Electrical

Characteristics

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

Dimensions 2.00 x 3.25 x 0.64 in. (50.8 x 82.6 x 16.3 mm)

Weight 1.8 oz (51g)

Connectors Data/power: 10 pin (2x5) unshrouded header on 0.100 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 Time RAIM

100PPS output

Automatic site survey

Jamming protection)

Miscellaneous

Optional Features Lithium battery

Straight OSX RF connector

Revision 5.0 08/30/02

3.16

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