Locked Re: Water Fall display distribution of users #Waterfall #TechnicalHelpQuestion
You don't say what rig you have but you're correct many rigs have about a 2400Hz bandwidth.
If you turn off Flatten, set Start=0, and increase Bins/Pixel to see the right edge, and go to a quiet spot (usually 5Khz below or above the FT8 segment) you can see your Rx bandwidth which should look something like this. Your edges are probably not as steep as my SDR.
#1 Waterfall is not limited to 2.5KHz -- what makes you think it is? The rig bandwidth is the main limiting factor,.
#2 Where do see a recommendation to limit to 1500-2000? There is mention that is what the split modes do. A couple of us have been on the war path the last few years to clean up all the operators generating harmonics. None of them were using split mode as that mode avoids even the 2nd harmonic which could be at a minimum of 3KHz (i.e. 1.5Khz*2=3KHz). We're down to seeing about 1 or 2 ops generating harmonics per week now.
#3 If you use Rig Split or Fake It any harmonics you generate are unlikely to be seen. Better to not generate any as that is some of your power being wasted.
#4 You can't see your own harmonics without another receiver.
#5 Yes -- transmitting above 2400 or so will limit who sees you. I've worked with many operators with 2KHz or less bandwidth as they didn't understand the effect on decoding.
On Wednesday, October 6, 2021, 04:16:59 PM CDT, Chuck Moore via groups.io <wd4hxg@...> wrote:
While trying to identify an anomaly around 2300 Hz on the waterfall display I was curious about what is above