Wish: Smoothen analog signal meter output #868
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JordanFischer21
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It is just a direct translation of signallevel to volts. So it is very logaritmic. Also all depends on your full scale uA value of the used meter. I can't adjust anything on this in software. |
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Compared to the digital dbuV meter, the analog output at IO27 much less stable.
Fluctuation is probably caused by the modulation. With a strong local station at the antenna I measured 0.6% 'noise' on the digital meter and about 6% at the width of the 1Khz PWM analog output. I don't see this variation on the analog output when the tef is directly connected to a HF signal generator with a modulated signal. Don't understand yet why. Looks not related to bandwidth setting.
Proposal is to use the same kind of LPF? filtering which is used for the digital meter also for the PWM analog output.
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