4 ms·
In the US there's a maximum symbol rate? I guess I thought that'd apply. 1.2 kbps perhaps? My Google foo is failing me.
by th0ma5 5y ago
In the US there's a maximum symbol rate? I guess I thought that'd apply. 1.2 kbps perhaps? My Google foo is failing me.
- dbcurtis 5y agoI believe those regulations have changed.
- wmf 5y agohttps://ham.stackexchange.com/questions/10556/do-fcc-regulations-limit-digital-data-rate https://ham.stackexchange.com/questions/10556/do-fcc-regulat...
- can16358p 5y agoNot an electronics expert here, sorry if it doesn't make sense but why is there a limit on symbol rate anyway? I understand tx power limits to avoid interference, but why an additional symbol rate limit too?
- OJFord 5y agoAnti-encryption I believe, keeping the barrier for receiving low.
- kmbfjr 5y agoBecause it is a shared resource. It is limited not to exceed the bandwidth of a “typical” SSB transmission. Typical is in quotes because some people think it is cool to allow their radios to transmit up to 10KHz bandwidth because “high fidelity SSB” is apparently a thing.
- NovemberWhiskey 5y agoThe symbol rate is ultimately linked to the amount of bandwidth a signal uses, i.e. the amount of the radio spectrum that's used by a signal, rather than the physical area over which that spectrum is used (which relates to power).