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.
PRM4 front plate
3.4 Signaling lights
The above figure illustrates the layout of the LED signaling lights. The LED functions
are shown in the following table.
Indicator
Colour
Description
LED Power
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.
LED Mode
Red
On when the device is in special modes.
LED Rx Data
Green
On when receiving data.
LED Tx Data
Red
On when sending data.
Radio modem PRM4 868MHz /User's manual V1.6 / 24.05.2011
10
