I was messing around with my BC246T earlier today and had it hooked up to a DSP (digital signal processor). The DPS is probably at least 10 years old and is Radio Shack brand. It was originally $30. Just hooking up the scanner to the DSP cuts out so much extra hiss and noise. I don't understand how we can pay hundreds of dollars for high-end analog scanners and not have better DSP technology. We're talking about $30 technology that's ten years old and yet still makes a world of difference. So why do we still have the background hiss on even full-quieting signals? Maybe someone can enlighten me.