[GreenKeys] M28 ASR Print Issue

[Harold Hallikainen]

On Mon, June 3, 2024 4:20 pm, John, W9DDD wrote:
> My impression is that dot cycle is designed to test a circuit for bias.
> Square wave in and hopefully square at the other end of the line.   The
> QBF and RY are for testing terminal equipment.
>


Another useful signal is random 22 milliseconds bits allowing the
generation of an eye pattern in a demodulator without needing to sync to
the original data. I used LTSPICE to generate random AFSK data. More info
at
https://w6iwi.org/rtty/DspTU2/#:~:text=the%20printer%20motor.-,Tone%20Filter%20Bandwidth,-25%20November%202023

Harold
https://w6iwi.org




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