User`s guide

Chapter 3 - Receiver Descriptions
M12+ TIMING RECEIVER TECHNICAL CHARACTERISTICS
Table 3.3: M12+ Timing Receiver Characteristics
Receiver Architecture 12 Channel
L1 (1575.42 MHz) operation
C/A code (1.023 MHz chip rate)
Code plus carrier tracking (carrier aided tracking)
GENERAL
CHARACTERISTICS
Tracking Capability 12 simultaneous satellite vehicles
Dynamics Velocity: 1000 kts (515 m/s), > 1000kts permissible
at altitudes < 60,000 ft (18 km)
Acceleration: 4g
Jerk: 5m/s
3
Vibration: 7.7g per Mil-Std 810E
Acquisition Time
Tested at -30 to +85°C
25s typ. TTFF hot (current almanac, position, time,
ephemeris)
50s typ. TTFF warm (current almanac, position,
time)
200s typ. TTFF cold (no stored information
<1.0s typ. Internal reacquisition after blockage
Positioning Accuracy
<25m SEP without SA
<100m 2dRMS with SA per DoD spec
Timing Accuracy (1PPS or
100PPS with Position-Hold
active
Performance using clock granularity message
<2nS, 1σ average
<6nS, 6σ average
Performance without clock granularity message
<10nS, 1σ average
<20nS, 6σ average
Antenna Requirements
Active antenna module, 18-36 dBm external gain as
measured at receiver RF connector
3-5V power, 80mA max. current draw
PERFORMANCE
CHARACTERISTICS
Datum Default: WGS-84, one user definable
SERIAL
COMMUNICATION
Output Messages Position, time, receiver status
Motorola binary protocol, 9600 baud
User selectable update rates (continuous or polled)
3V CMOS/TTL inverted interface
Power requirements 2.85 to 3.15 Vdc, 62 mA typ., 50mV max ripple
185 mW @ 3V, less antenna current
ELECTRICAL
CHARACTERISTICS
"Keep-Alive" BATT
2.2 - 3.2 Vdc, 5 µA typical @ 25°C at 2.7V
Dimensions 40 x 60 x 10 mm (1.57 x 2.36 x 0.39 in)
Weight 25g (0.9 oz)
Connectors Data/power: 10 pin (2x5) unshrouded header on
1.27 mm (0.05") centers
Available in right angle or straight configurations
RF: MMCX End-launch jack
PHYSICAL
CHARACTERISTICS
Antenna connection Single coax cable
Operating temperature
-40°C to +85°C
Storage temperature
-40°C to +105°C
Humidity
95% over dry bulb range of +38°C to +85°C
ENVIRONMENTAL
CHARACTERISTICS
Altitude
18,000 m (60,000 ft) maximum
> 18,000 m for velocities < 515 m/s (1000 kts)
Standard features
Motorola binary protocol at 9600 baud
Position-Hold with automatic site survey
Clock granularity error message
T-RAIM (Timing Receiver Autonomous Integrity
Monitoring)
MISCELLANEOUS
Optional features Onboard rechargeable lithium backup battery
NOTES
All specifications typical and quoted at 25°C unless otherwise specified
Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05
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