On Tue,1/19/2016 4:53 PM, Joe Taylor wrote: > Sure, we could set the level higher. WSJT-X works OK with the noise > level set anywhere between about 20 dB (rms=10) and 60 dB (rms=1000). > But the 16-bit A/D converter necessarily clips at ± 32767, about 90 > dB. If you set the background noise level much higher to, say, 60 dB, > you have only 30 dB of "headroom" for strong signals.
Hi Joe, I think the design choices you've made are entirely appropriate. My only concern is the way we TALK about things like this. When I first began using your modes, I had to ask what the dB numbers mean. That should be in documentation -- not operationally, but in "here's how it works" sidebar paragraphs. Just as it's important that users understand how things work with encoding and decoding algorithms, it's also important that users understand the fundamentals of level matching in both analog and digital domains. I have the same issues with use of the words "balun," "grounding," and "ground loops" to inadequately, improperly describe, or even conceal fundamental concepts from the reader. Thanks and 73, Jim K9YC ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
