开云体育

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Looks like a copy paste error here for mode B

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? ? ? ? if (cw_mode == CW_IAMBICB){
? ? ? ? ? ? if (cw_next_symbol == CW_IDLE && cw_last_symbol == CW_DOT && (symbol_now & CW_DASH)){
? ? ? ? ? ? ? ? cw_next_symbol = CW_DASH;
? ? ? ? ? ? }
? ? ? ? ? ? if (cw_next_symbol == CW_IDLE && cw_last_symbol == CW_DASH && (symbol_now & CW_DOT)){
? ? ? ? ? ? ? ? cw_next_symbol = CW_DASH;???? this should be CW_DOT I think

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On Mon, Mar 31, 2025 at 02:37 AM, Gordon Gibby KX4Z wrote:

Why only 18?

Current sbitx goes much faster!

That seems like a serious limitation……

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73

Gordon KX4Z

sBitx has an RPi 4, the zBitx has an RPi Zero 2 W, effectively a low-memory RPi 3B+ (the CPU on the Zero 2 is the same as the CPU on the RPi 3B+).

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The processing of the RPi 4 is significantly greater than the RPi Zero 2.

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Ken, N2VIP

Ken, you may be right. I looked at some benchmarks and it looks like the pinfour can be four times or more faster than the 3B plus.?

if that turns out to be the limitation then experienced CW operators might just have to wait for a faster processor or more RAM or something

It’s just surprising because a small change in the software of the SBitx, even tripling. sampling rate would likely work just fine. Johnshoy’s fix multiplied sampling by 20 times!! ? That was probably overkill, but it works great. You would think a similar solution on the slower processor could be arranged to give similar outcomes.

however, perhaps not!

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A new processor comes out every so often so eventually, this will get fixed!!

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gordon kx4z?

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If straight key would work with an external electronic then one could place a small keyer electronic inside the zBitx with a small pot for speed control. I could live with such a solution. Not the original idea, but better than today.

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73, Gerald - HB9CEY