Forum: >>> Magnum BBS <<<

[K0NR] Adios Symbol Rate Limit

From K0NR via rec.radio.amateur.moderate@21:1/5 to All on Sun Oct 29 23:33:37 2023

XPost: rec.radio.amateur.space

Post : Adios Symbol Rate Limit
URL : https://www.k0nr.com/wordpress/2023/10/adios-symbol-rate-limit/ Posted : 29 October 2023 at 9:33 pm
Author : Bob K0NR
Categories : FCC, Ham Radio, HF, VHF/UHF

https://www.k0nr.com/wordpress/wp-content/uploads/2023/10/OBW-measurement.jpg The FCC will be voting on and will likely approve a Report and Order ( https://docs.fcc.gov/public/attachments/DOC-397992A1.pdf ) that eliminates
the symbol rate restriction on HF data transmissions, replacing it with a bandwidth limit of 2.8 kHz. See FCC To Vote on Removing Symbol Rate Restrictions ( https://www.arrl.org/news/fcc-to-vote-on-removing-symbol-rate-restrictions )
. The symbol rate limit of 300-baud is an obsolete way of limiting the signal bandwidth, created back when the data transmissions were predominately Frequency Shift Keying ( https://en.wikipedia.org/wiki/Frequency-shift_keying
) (FSK). It was a simple, practical way to regulate the bandwidth at that
time but technology has moved on. The use of digital signal processing and efficient wireless encoding techniques require a better approach to bandwidth regulation.

[...]

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Sysop:	Keyop
Location:	Huddersfield, West Yorkshire, UK
Users:	741
Nodes:	16 (2 / 14)
Uptime:	111:18:23
Calls:	12,463
Calls today:	5
Files:	15,198
Messages:	6,538,159