|Submarine sonar room|
An entire band - or several bands - can be seen at once. CW activity, digital, SSB - it's all there. Click on any signal and you hear it in the headphones or can zoom in on it. Zooming in, its sidebands and their characteristics can be discerned.
When such radios came to market (and became affordable!) I knew I had to have one. Even before
|BQQ-5 sonar display|