The PKI 4245 Detection Receiver 10kHz to 6GHz detects known, unknown, illegal disruptive or interfering RF transmission in a frequency range between 10kHz and 6GHz. A variety of user selected operating modes are presented on a 3.5″ graphical touch screen display. Portability, versatility and responsiveness make the PKI 4245 Detection Receiver advantageous for many technical applications. To ensure the necessary input sensitivity of the PKI 4245 Detection Receiver 10kHz to 6GHz, we use 4 different antennas in the range from 10kHz to 60MHz for aignal detection on power lines. 740MHz – 2.75GHz for the detection of cell phones, WiFi, 20MHz – 6GHz low gain antenna for short range locating, 30MHz – 6GHz whip/dipole passive RF antenna was developed. The antennas can individually be connected to the PKI 4245 Detection Receiver using a cable connector.