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How many characters per second ($7$ bits + $1$ parity) can be transmitted over a $3200$ bps line if the transfer is asynchronous ? (Assuming $1$ start bit and $1$ stop bit)

  1. $300$
  2. $320$
  3. $360$
  4. $400$
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1 Answer

Best answer
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Answer B

In asynchronous transmission, for each character, we need to send data, parity, start and stop bits.

Size of one character = 7+1+1+1 =10 bits

Line transmits 3200 bits in.one second.

No of characters transmitted in one second = 3200/10 =320

======================:==========
NOTE
 In synchronous transmission, we need to send ONLY data and parity in each character

Size of a character =7+1=8

Number of characters sent in one Second =3200/8=400

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