RoyalTek rgm-3550lp Benutzerhandbuch

 

 

9

„ RX 

This is the main receiver channel and is used to receive software commands to 

the board from SIRFdemo software or from user written software. 

PS: Pull up if not used. 

„ TX 

This is the main transmitting channel and is used to output navigation and 

measurement data to SiRFdemo or user written software. 

„ GPS 

Status 

GPS Status Pin can be connected to a LED to indicate the status of GPS signal   

1. 

Solid: Power ON/ Tracking for Satellite 

2. 

Blinking: 3D Fix Found 

 

GPS status light indicating 

Power off   

LED off 

VoL:0.71(Max) 

Power on/search for satellite, voltage is high 

LED solid 

VoH: 2.13V(min) 

3D fix found, voltage is high/low, remain 1 

second each 

LED blinking 

VoH: 2.13V(min) & 

VoL:0.71(Max) 

„ 

External Antenna RF Input 

          This is the MMCX RF Connector for External Active Antenna signal input   

     External Active Antenna Spec. Suggestion 

1.  Drive Output Voltage: 

%

5

.

0

85

.

2

±

=

 

2.  Drive Output Current: 

)

(

30

=

 

3.  LNA Gain: 20~26dB 

4.  LNA Noise Figure: <1.5dB 

 

The power supply of RGM-3550LP is 3V. If customer would like use RGM-3550LP in 

5V system, RoyalTek suggest customer use linear regulator (from 5V to 3.3V) on 

customer main board. We could help check the circuit if providing regulator 

specification.