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zBitx - red line in FT-8 spectrum display
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Just got my new zbitx and I love it. Have only run FT8 so far. I have some questions.?
Is the vertical red line in the FT-8 spectrum display not the TX tone? I select PITCH and turn the knob. The number in the box changes, but the red line doesn¡¯t move. How then does one avoid being underneath the strongest signals?
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I realized that the redline that allows us to position our own frequency in the congested FT8 passband is useless. This is because your signal must appear in a an empty slot at the receiving station. There is not much very little chance that what appears to be a clear frequency to you is also clear to the receiver unless both of you are within the line of sight with each other. On Tue, 27 May, 2025, 7:49?am Neil K6NCX via , <neil.fullagar=[email protected]> wrote:
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Ashhar Farhan,
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It is my understanding that proper FT8/4 etiquette dictates first listening through both the first and second cycles of the protocol to verify a clear frequency, at least on your end.? WSJT-X software uses the "red line" to pick that frequency.??I agree that the receiving location could have a different set of station magnitudes being received and not be a clear frequency.
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The red line is a visual indicator to help us determine if we are on a clear frequency.
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73
Evan
AC9TU |
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So the red line is indicative of nothing? If so, it would be much clearer to simply remove it.?
But, while I certainly agree that what is a clear freq for me is not necessarily a good predictor of what is a clear freq for another station, I don¡¯t agree that it¡¯s useless. It certainly seems that when I¡¯m repeatedly not getting through, adjusting the TX pitch based on what I can see helps.? |
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