this post was submitted on 15 Nov 2023
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Baud rate replaced by bandwidth limit (www.radioworld.com)
submitted 11 months ago by [email protected] to c/[email protected]
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Bands with a 300 baud rate limitation eliminated by this order are the 160 meter band; 80 meter band; 40 meter band segments 7.000–7.100 MHz and 7.100–7.125 MHz; 30 meter band; 20 meter band segment 14.00–14.15 MHz; 17 meter band segment 18.068–18.110 MHz; 15 meter band segment 21.0–21.2 MHz; and 12 meter band segment 24.89–24.93 MHz. The 10 meter band segment 28.0–28.3 MHz has a 1200 baud rate limitation, which is also lifted.

“Instead, the commission establishes a 2.8 kHz bandwidth limitation in the applicable amateur radio bands,” it said.

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[–] [email protected] 4 points 11 months ago (2 children)

That's basically what I mean. The assumption that baud = bandwidth meant that hams could be penalized for using more efficient digital modes, having a deleterious effect on experimentation with digital modes in bands that were thus restricted. It makes far more sense to limit bandwidth than symbol rate. Who cares how fast your messages are as long as they don't cause interference?

[–] [email protected] 1 points 11 months ago

Who cares how fast your messages are as long as they don’t cause interference?

Totally.

Yeah I wasn't sure if you misunderstood or not from your post, but figured my response might help other readers.

[–] [email protected] 1 points 11 months ago

More efficient digital modes never used high baud rates, though. Often they used surprisingly low baud rates.

As an example, 4GLTE has a maximum baud rate of 15ksym/s