Pick yourself up an SDR Play to track down those unknown signals, attach it to your PC... add a shortwave antenna such as an End Fed Half-wave, or just a long wire. Could be a signal from an alarm system or heterodyne from a solar inverter. easier to ID with a receiver. Think the SDR Play receives from 1Hz to 2GHz.
Pick yourself up an SDR Play to track down those unknown signals, attach it to your PC... add a shortwave antenna such as an End Fed Half-wave, or just a long wire. Could be a signal from an alarm system or heterodyne from a solar inverter. easier to ID with a receiver. Think the SDR Play receives from 1Hz to 2GHz.