Panadapter - F4HTB/Universal_HamRadio_Remote_HTML5 GitHub Wiki

If your transceiver has an IF output you can use an rtl_sdr key to view a panadapter. In this panadater you can -zoom with the mouse wheel. -Click in the spectrogram or the watterfall to change the frequency. ...to contiue

You can configure in the configuration page: -The sample rate -The gain of the key ..to contiue

The icon only appears if the server detects an rtl key at startup.

Here is what it looks like. Click on image to enlarge.