Copyright © 2008 NCSNavi Technology Inc. All rights reserved.
7
4. Technical Specification
4.1. Basic Specification
z
Chipset
：
MTK MT3318
chipset
.
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Channels
：
51 parallel satellite-tracking channels.
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Frequency
：
1575.42 MHz
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Receiver
：
L1, C/A code.
4.2. Acquisition Time (refer to MTK chip specification)
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Reacquisition
：
0.1 second.
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Cold Start
：
< 36 seconds.
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Warm Start
：
< 33 seconds .
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Hot Start
：
< 1 second
4.3. Receiver Accuracy
z
Normal
：
< 3 meters CEP without SA.
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Enable EGNOS or WAAS
：
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Position
：
< 2.2 meters, horizontal 95% of time
< 5 meters, Vertical 95% of time
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Velocity
：
within 0.1 meter / second
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Time
：
0.1 microsecond synchronized GPS time
4.4. Use Limitation
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Altitude
：
< 18,000 meters (60,000 feet)
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Velocity
：
< 515 meter / second (1000Knots)
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Acceleration
：
4 G.
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Jerk
：
20 meter / second
3
, max
4.5. Power Supply
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External Voltage: 5V DC +/-5%
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Batteries
：
Main Power: Built-in rechargeable Lithium-ion for system power.
z
Working Voltage: 40~50mA (Normal mode).
35mA (Power Saving).
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Auto Power Saving Mode.
z
Circuit protection on R150+ when over-temperature condition 50 occurs.
℃
