IC-7300 Panadapter is a high impedance SDR probe for ICOM IC-7300, and enables the TX/RX line of the IC-7300 for SDR use. In addition to its flat frequency response from 30kHz to 120MHz, the panadapter has a built-in high input impedance amplifier to monitor the TX/RX line of the radio. As contrary to conventional approaches, this method does not load the TX/RX line and provides attenuation/distortion-free measurement.