2 ms·
The Bell 202 modem standard is FSK at 1200 baud (albeit introduced later in the 70s) and the standard actually continued to be popular into the 2000s for commun
by NovemberWhiskey 5y ago
The Bell 202 modem standard is FSK at 1200 baud (albeit introduced later in the 70s) and the standard actually continued to be popular into the 2000s for communication between process automation systems.
1200 baud AFSK is also the baseband encoding for the popular APRS amateur radio standard.
- Animats 5y agoAh, the FSK frequencies were moved further apart. Bell 103A: 1,270 Hz and 1,070 Hz. 600 baud with that narrow a shift would be iffy, especially before phase-locked loops. Bell 202: 1200 Hz and 2200 Hz. With a full 1KHz shift, 1200 baud could work.