Re: More Radio Articles and Designs
Phil,toggle quoted messageShow quoted text
What I meant to say is that the S/N meter doesn't work when offset tuned. The RSSI meter still works in this case.
I tried using offset tuning with my PL-380 last night on SW. For me, the best combination is the 2 kHz filter with a 1 kHz offset. This provides very intelligible audio, and seems to reduce fading distortion a bit. I guess in theory a 2 kHz offset should be better, but it makes the sound too shrill, especially on fades. A 1.5 kHz filter with a 1.5 kHz offset might be ideal, but this is not possible with a stock radio.
A slower AGC would help quite a bit for fading distortion and pumping, but I'm not aware of any small radios that offer selectable AGC speeds.
A nice feature of the DSP filters is that they seem to be perfectly symmetrical. This is usually not the case with physical filters, unless they are very expensive.
--- In ultralightdx@..., "gkinsman1" <gkinsman@...> wrote: