Study Notes on Asynchronous and Synchronous Transmission

Definition: Asynchronous transmission is a method of transmitting data where the time intervals between bits are variable.
Example of Transmission Rate:
- In this scenario, a computer processes 128 bits per second.
- A Universal Resource (UR) line transmits at a raw line rate of 9,060 bits per second.
Conversion of Characters:
- To send the uppercase character 'A', the decimal value of 65 is converted to binary resulting in the use of 7 bits.
- This conversion involves the binary system where the decimal number users translate the value into its corresponding binary form, which here is 65 (decimal) = 1000001 (binary).

Definition: Synchronous transmission is a method of data transmission where data is sent in a continuous stream without gaps.
Bits Involved in Transmission:
- The 7 bits originally used to describe the uppercase letter 'A' in asynchronous transmission carry the information of the letter only.
- Additional Bits Required:
- In synchronous transmission, an extra bit is necessary to indicate the start of the uppercase letter.
- This ensures clarity in identifying the beginning of the character in transmission.
- Ending of Transmission:
- An ending signal is also needed after the 7 bits that correspond to the uppercase letter 'A', to communicate that the transmission of that character is complete.
VANITY Bit:
- A 'vanity bit' is crucial in ensuring the integrity of the transmission process, as it confirms that both sender and receiver are synchronized in processing the transmission.
- This bit helps in reducing errors by ensuring both devices are operating on the same data values.