2 ms·
I think the FCC should remove the 300 baud limit for HF which is super arbitrary and limiting for real digital modes. That limit makes modes that are quite dist
by hatsunearu 8y ago
I think the FCC should remove the 300 baud limit for HF which is super arbitrary and limiting for real digital modes. That limit makes modes that are quite distant from modern day commercial digital modulations viable--FT8, JT65, and so on being examples.
They are primarily asynchronous MFSK detectors with tons of symbols--pretty weird design and a work around of the 300 baud limit. We can't get cool stuff like QAM, high rate PSK, and other nice modes working because of this arbitrary old rule.
- ac29 8y agoCurious, what about the symbol rate limit limits you from using, say 8PSK or 16QAM? Is it that it also effectively limits channel bandwidth to something that isn't practical to transmit and/or receive with higher order modulation?
- hatsunearu 8y agoSuper late but good question. I should ask some seasoned hams about this. I'm curious as well.