Haicom HI-305III User Manual - 4.1 Led Indicator

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4.1 LED Indicator

4.2 External Antenna

   Basically, you don't need external antenna to perform GPS 

positioning with HI-305III  since it already build-in active antenna.  

HI-305III  can receive good satellite signal without external antenna 

even using in car dashboard or side window. The only condition that 

you need external antenna is when HI-305III  can not directly "see" 

the sky, For instance, when you are in the middle of a car, or any 

environments that GPS signal is blocked, the external GPS antenna 

will help to receive better GPS signal.

   Plug the external antenna with MMCX connector to the plug on 

the side of HI-305III . Place the magnetic external antenna on the 

roof of the car or outdoor open-space, and make sure place it in 

correct direction. That is, the side with magnetic is the bottom side, 

and the upper side must face to sky in order to receive better signal.

Notice:

Hold the antenna connector while you plug the external antenna 

into HI-305III  or unplug the external antenna from HI-305III .  Do not 

pull the cable line.

LED off

LED flashing

LED on

Receiver switch off

3D Position Fixed

Signal searching

4. System