The baud rate is also called telegraphy speed. In Morse telegraphy the symbols are from an alphabet with characters formed from dashes and dots but of varying length. (Thus a mathematically fixed translation formula is not possible.) Speeds are often given in characters per minute. Other levels of measuring are units of 5 grouped characters. (Might arise from transmitting encoded messages in military chiphered exchange.) Other measures might be word counts such as in billed telegraphy services across ocean lines.

You added an image. Baud means the number of signal state changes per time unit (seconds) as shown with the red level line in the time diagram. Bitrate means the number of bits per time unit (seconds). Each plateau in this diagram means a certain state of signaling. this state is often called a "symbol". It represents one or more bits, like the letter "A" on paper would mean 7 bits in the classical ASCII encoding. Writing down 20 such letters means a speed of 20 baud - but a total of 140 bits.

Good point, Peter. The question was not that clear for me if this item in the stack has even awareness - it definitely contributes in a larger amount of cases to the difference between user seen capacity and baud rate. - Further paragraphs on parallel busses and on /symbol/ based transmissions (or modulated signals) were there already.

@ElliotAlderson - i was just sort of teletyping, i am sorry and will watch for it in the future.

there might be the chance that having some wires close to certain circuits and parts an effect is created that impacts on power consumption of the device. coil based amperemeters would definitely have a magnetic field. and such fields can impact on e.g. feritic beads as well as on air coils and on transformers. - reminds me of the teacher that once had built an oscillator and it ran only when he attached a measurement device. in the end he used a resistor of similar value as the meter - and his oscillator continued to work. - thats the impact of doing measurments.

okay, then this doc page would be the backgrounder for a possible answer: keil.com/pack/doc/mw/USB/html/… - for me its above current digging if the device in question has codes or support for more than one CDC-ACM port.