9166JT65/JT4 - Max sync values + frequencies
- Oct 1, 2012Hi all
Max sync values
I wonder what is the highest possible "sync value" in JT65 and JT4 respectively? Even if I connect two PCs directly to each other I have not seen values above say 28. E.g. shouldn't it be 63 for JT65?
I have seen several values for the highest tone in JT65. For JT65C I have seen values from 685 Hz to 711 Hz. However, using the math from "The JT65 Communications Protocol, March 9, 2005" I cannot get anything else than ~700 Hz (JT65C) above the sync tone.
Tone_N = Multiplier * (N+2) * 11025/4096, were
Multiplier: ~A = 1, ~B = 2 and ~C = 4
N: 0 to 63
Thus for JT65C:
Tone_0 = 4 * 2 * 11025 / 4096 = 21,533203125 Hz above sync
Tone_63 = 4 * 65 * 11025 / 4096 = 699,8291015625 Hz above sync
- Next post in topic >>