Ham Amateur Radio Technician Practice Exam

Which of the following describes Baudot code?

1. A 7-bit code with error correction

2. A 5-bit code with additional start and stop bits

3. A binary code for speech encoding

4. A numerical code for teletext transmission

The correct answer is: A 5-bit code with additional start and stop bits

Baudot code is a character encoding system that utilizes a 5-bit code, which allows for the representation of a variety of characters, notably in telegraphy and data communications. In its standard operation, Baudot code typically employs additional start and stop bits when transmitting data. This framing ensures that the receiving equipment can determine when a new character begins and ends, making it suitable for serial data communication where timing is critical. The emphasis on the 5-bit structure of Baudot code is significant because it differentiates it from other forms of encoding, such as ASCII, which is a 7-bit code widely used in computer systems. The ability to have start and stop bits is also essential in controlling the flow of data, ensuring that the receiver can synchronize correctly with the sender. This combination of features makes Baudot code particularly effective for telegraphy, where precise timing and character representation are crucial for successful communication.