... Specification: ItemsTETRA Fiber Optical RepeaterDonor UnitRemote UnitFrequency Range Uplink806-821MHzDownlink851-866MHzWorking Band WidthVarious bandwidth is available ... requestNo. of Channels1,2,4,6,8 for optionTransmission DistanceMax20KM(From Donor Unit to Remote Unit ... Power Supply(Optional)6hours/8hoursNMS Monitor FunctionReal-time alarm for Door Status, Temperature, Power Supply, VSWR, Output ...