HOLUX
GR-231 Bluetooth GPS Receiver Manual
6
4. Technical Specification
4.1. Basic Specification
Chipset
：
SiRF Star IIe/LP chipset
.
Channels
：
12 parallel satellite-tracking channels.
Frequency
：
1575.42 MHZ.
Receiver
：
L1, C/A code.
4.2. Acquisition Time (averaged)
Reacquisition
：
0.1sec.
Snap start
：
< 3 seconds (at < 25 minutes off period)
Cold start
：
< 45 seconds.
Warm start
：
< 38 seconds .
Hot start
：
< 8 seconds
Update rate
：
1 second continuously
4.3. Receiver Accuracy
Normal
：
5-25 meters CEP without SA.
Enable EGNOS or WAAS
：
(Only for the standard software)
Position: < 2.2 meters, horizontal 95% of time
< 5 meters, Vertical 95% of time
Velocity
：
within 0.1 meters / second
Time
：
1 microsecond synchronized GPS time
4.4. Use Limitation
Altitude
：
< 18,000 meters (60,000 feet)
Velocity:
：
< 515 meters / second (700Knots)
Acceleration
：
4 G.
Jerk
：
20 meters / second, max
4.5. Power Supply
External Voltage: 5VDC +/- 10%
Batteries
：
Main Power: Built-in rechargeable Lithium-ion for system power.
Backup Power: Rechargeable Lithium-ion battery for memory & RTC backup.
Working voltage: 80-90mA (Normal mode).
30mA (Power Saving).
Working period (In Battery full power status):
> 9 hours on Continue mode.
> 16 hours on Power Saving mode.
Protection circuit on GR-231 should stop charging the cell when
