Leadtek Research Inc LR9821S 用户手册

                                                                                                                                                   

 

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1 Main Features 

‹ 12 Channels “All-In-View” Tracking 
‹ Position accuracy of 10 meters 2D RMS 
‹ Cold/Warm/Hot Start Time: 45/38/8 Seconds 
‹ Reacquisition Time: 0.1 seconds 
‹ RF connector for external GPS antenna 
‹ Supports Standard NMEA-0183 
‹ Compatible with Bluetooth devices with Serial Port Profile (SPP) 
‹ Superior Sensitivity for Urban Canyon and Foliage Environment 
‹ Small, sleek, and lightweight design easily fits in your hand 
‹ Two LEDs indicating Bluetooth and GPS activity 
‹ Lithium-ion battery lasting full working day typical use 
‹ On/off push button 
‹ Dimensions:    1.81” x 3.38” x 0.75” / 46mm x 86mm x 19mm 

 

2 Specifications 

 Items 

Description 

Chipset 

GSP2e/LP 

SiRF starII LP technology 

Frequency

 

L1, 1575.42 MHz

 

C/A code

 

1.023 MHz chip rate

 

Channels

 

12

 

General 

Antenna 

Built-in Ceramic patch antenna 
External antenna optional 

Position 

10 meters, 2D RMS 

Velocity 0.1 

meters/second 

Accuracy 

Time 

1 microsecond synchronized to GPS time 

Datum 

Default WGS-84 
Reacquisition 

0.1 sec., average 

Snap start 

2 sec., average   

Hot start 

8 sec., average typical TTFF 

Warm start 

38 sec., average typical TTFF 

Acquisition   
Rate(Open Sky 
& Stationary 
Requirements) 

Cold start 

45 sec., average typical TTFF 

Altitude 

18,000 meters (60,000 feet) max. 

Velocity 

515 meters/second (1000 knots) max. 

Acceleration 4g, 

max. 

Jerk 20 

meters/second

3

, max. 

Main power input 

3.3±10%V DC input. 

Charging Power 

5VDC±10% 

Battery Source 

Rechargeable 600mAh Lithium-Ion battery 
with 5V DC input charging circuit 

Supply Current 

Please refer to the following table. 
<Note 1> 

Battery Charging 

Full charge 2 hours