and the emergence of lots of small wideband SDR receivers is the home base for OpenWebRX, a remote spectrum monitoring system written by Andras HA7ILM. The system is designed to allow OpenWebRX servers, running on RTL-SDR or HackRF hardware, to share their radio spectrum and allow remote tuning of the available radio bandwidth. A typical installation will allow up to four remote listeners to independently tune in, and the tuning filters allow the listener to independently control the bandwidth of the receiver. »