DECODE PRM4 사용자 설명서 - 페이지 10

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3.3 The antenna connector

The antenna is connected on a SMA female connector on the front plate of the device.

The antenna should be for 863 to 870MHz band with an impedance of 50Ω. The

antenna included in the product pack has a 0dBi gain. In case the additional range

ought to be achieved the higher gain antennas must be used.

The above figure illustrates the layout of the LED signaling lights. The LED functions

are shown in the following table.

Indicator

LED Power

LED Mode

LED Rx Data

LED Tx Data

Radio modem PRM4 868MHz /User's manual V1.6 / 24.05.2011

PRM4 front plate

Colour

Description

Green

Constantly on when the power supply is

connected, the device's processor is active

and if the reduced power consumption mode

is set to 0 or 2. If this parameter is set to 1 or

3 this indicator flashes with the frequency of

8Hz.

Red

On when the device is in special modes.

Green

On when receiving data.

Red

On when sending data.