Bonnie, Your definition below is not at all my understanding, nor does it square with anything that I have read on baud rate.
My understanding for many years has been that baud refers to the symbol rate per second. In other words, the actual changes or transitions taking place per second. The rate of data throughput (the signaling rate) is often expressed as bits per second (bps). Some baud rates may allow for more data throughput in bps than the baud rate because one symbol can carry more than one bit depending upon the modulation scheme. What do you consider the baud rate to be, if not the symbols per second? KV9U expeditionradio wrote: >> Rick, KV9U wrote: >> Isn't the baud rate the same 2400 baud, all >> the time for this modem, >> > > > Hi Rick, > > Perhaps you have been confusing "baud" and "symbols per second". > This is a common mistake many hams have with complex digital formats. > > To answer your question... > > The MIL STD 188-110 serial PSK modem signal on the air > is 2400 symbols per second. > The non-standard RFSM2400 is 2000 symbols per second. > > The baud rate, determined by coding, may change. The > symbol rate stays constant. The baud rate may be as low as > 75 baud or as high as 4800 baud. > > If your issue is about how this affects your FCC compliance, > the answer to that is: > > 1. These modems do not exceed FCC's limit for sending image or > voice content in the image/voice subbands... because there is > no FCC symbol rate limit in the image/voice subbands. > > 2. These modems do not conform to FCC's arbitrary 300 symbol > per second limit for the USA ham radio HF RTTY/data subbands. > > Do not pass Go. > Do not collect $200. > Stay in Technology Jail. > :) > > Bonnie KQ6XA > >
