What is the time to transmit an 8-bit word?Ĭlarification: Since all the bits are transmitted simultaneously, the time taken for the transmission of one bit is equal to the time taken for the transmission of any number of bits. In parallel communication, if the time interval to transmit one bit is 10μs. What is the time to transmit an 8-bit word?Ĭlarification: Total transmission time = time for each bit x total number of bits = 8 x 10μs = 80μs.ħ. In serial communication, if the time interval to transmit one bit is 10μs. The least significant bit is transmitted first and the most significant bit is transmitted in the end.Ħ. Which bit is transmitted first in a serial communication?Ĭlarification: In serial transmission, the bits are transmitted one after the other in a specific order. This causes inductive and capacitance effects which degrade the signal.ĥ. Why higher speed communications in parallel transmission require shorter length?Ĭlarification: As the speed of transmission or the frequency of transmission increases the wavelength of transmission becomes comparable with the length of the data bus. Parallel data are usually faster than serial since all the bits are transmitted simultaneously.Ĥ. To cover a distance of 10km for an 8 bit system, we need a cable of 80km length. Which of the following is a false reason for parallel lines not being used for long distances?Ĭlarification: One of the major disadvantages of using parallel transmission for long distance is that laying the data bus is costly. These cables carry a bit in each wire and are referred as data bus.ģ. What is the cable that carries the information in parallel transmission called?Ĭlarification: In a parallel transmission multiwire cables are used. Since each bit is transmitted individually, each bit requires a separate transmitter and a receiver.Ģ. In a parallel communication, each bit requires a transmitter and receiver.Ĭlarification: In a parallel transmission each bit is transmitted in a separate wire. Avionics Multiple Choice Questions on “Parallel and Serial Transmission”.ġ.

Parallel to serial converter timing