El 17/08/16 a las 19:57, George J Molnar escribió: > Then, as some suggest, it might be a good time to consider retiring the > slider, while retaining the thermometer. Not a "stop the presses" > change, but it might be a good usability bump. Perhaps even a color > coded indication for the dB-impaired?
Just to point out a usage scenario where the slider can be useful: On the HF bands, you can encounter very strong signals or not for each period. If you're using a conventional receiver, you'll need to use its AGC. Otherwise, the receiver will saturate if the RF gain is set too high or you'll lose SNR in the periods where there are no strong signals if the RF gain is set low enough to prevent saturation on strong signals. At least, this is what seems to work best on my FT-817ND. With this setup, the radio will present a constant audio output level whenever there are strong signals. Therefore, you can adjust your soundcard level (and perhaps any attenuation you have in front of it) to make the level, say 90% of maximum when there are strong signals. The soundcard will never clip, because the radio AGC prevents it. When using this strategy, I find that I have to set the slider in WSJT-X quite low to get 30dB when only receiving the noise floor. The level in WSJT-X will only raise to 40dB when receiving strong signals, because the AGC of the radio prevents a further increase. Of course, the slider in WSJT-X doesn't make any difference in decoding performance, but can be used to ensure a good level in the waterfall without having to tweak the waterfall sliders (same effect can be achieved with them, of course, but you have to tweak both the waterfall and spectrum zero points). At least, this is what I've being doing so far with my rig. Perhaps others can suggest a better strategy for a conventional receiver and the HF bands. 73, Dani EA4GPZ. ------------------------------------------------------------------------------ _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
