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MP 555 GPS Vehicle Installation Guide
30
GPS Performance
Table 3-5: GPS performance
Accuracy
Horizontal:
< 6 m (50%), < 9 m (90%)
Altitude:
< 11 m (50%), < 18 m (90%)
Velocity:
0.06 m/sec
Acquisition times
Re-acquisition
< 2 sec (90%)
Hot start:
< 14 sec (50%), < 18 sec (90%)
Warm start:
< 38 sec (50%), < 45 sec (90%)
Cold start:
< 90 sec (50%), < 170 sec (90%)
Operational limits
Altitude:
< 18,000 m or velocity < 515 m/sec
(either limit may be exceeded but not both)
I/O Port Characteristics
Table 3-6: I/O port characteristics
Absolute max
-0.3 VDC to 36 VDC
voltage
Digital inputs
Open-collector, max current 500 mA
Vih, min 2 VDC
Vil, max 0.8 VDC
Vih, max 36 VDC
Digital outputs
Open-collector
Analog input
Zero-scale: 0 VDC
Full-scale: 3.3 VDC
Leakage current: 66 µA
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