Satelline 3AS Epic

High-Speed UHF Radio Modem with 10 W Output Power and Diversity Reception

SATEL’s new radio modem SATELLINE-3AS Epic includes a high power (10 W) transmitter and two receivers which gives you numerous useful functions. Due to the powerful transmitter the coverage is better than before and the distances between the stations can be remarkably longer. With the Diversity Reception the modem selects the best signal from the ones received in distinction to the different points. Thus we can improve the reliability of the connection where there is a lot of fadings caused by reflections. These new characteristics, 10 W Output Power and Diversity Reception, make it possible to more than double the distances between the modems compared to the existing SATELLINE-3AS radio modems. 

SATELLINE-3AS Epic is compatible with the interface types RS-232, RS-422 and RS-485. Without changing the hardware all the parameter settings of the radio modem can be modified through the interface from a PC. 

The model SATELLINE-3ASd Epic is equipped with a Liquid Crystal Display (LCD) of its own, which facilitates programming of the radio modem.

Diversity Reception 

In radio systems it is not necessary to have a direct visual connection between a master station and a mobile station. A radio signal reflects from buildings and terrain e.g. such as hills. The fading occurs when a radio signal reflects from several objects to an antenna of a receiver and arrives into a receiver at different times. The signals at the receiving antenna are in different phases so in the worst case two equally strong signals being in opposite phases cancel each other out and thus will cause the fading. The dips of the sum signal appear with half wave intervals. In connection, which are only based on reflections, the reliability of the reception is depending on the position of the receiving antenna even ones fairly close to a base station.

SATELLINE-3AS Epic is equipped with two separate receivers. By setting two antennas for the diversity reception at least 3/4 x wavelength apart from each other the message can always be received by one of the receivers if not both. When installing the antennas in this way they are rarely at the same time in fading dips.