3 ms·
> bandwidth requirements satisfy the regs Please note that only the USA (afaik) imposes an arbitrary and restrictive 300 bd limit on HF digital modes. Here, a
by GoodbyeMrChips 5y ago
> bandwidth requirements satisfy the regs
Please note that only the USA (afaik) imposes an arbitrary and restrictive 300 bd limit on HF digital modes.
Here, amateurs are free to experiment with as much bandwidth and as high a baud rate as the physics will allow, provided we keep within legally allocated spectrum.
- dmd 5y agoWhere's "here"?
- CamperBob2 5y agoSounds like the Woodpecker site at Chernobyl. Hey, that was "legally allocated spectrum" too, right? To be fair, occupied bandwidth limits that were designed for 1920s-era modes don't make much sense with modern spread-spectrum technology. I don't care if an interferer takes up the whole HF spectrum, as long as their chip rate is too fast to make it through my < 3 kHz IF. Those ancient regulations have done a lot to keep Amateur Radio in the dark ages, as well as radio communications in general.
- mlyle 5y agoAKA you can transmit wide signals and take up the whole band :P The 300bps limit doesn't make sense anymore, but an occupied bandwidth limit sure does...