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Character transmission time at 1200 baud
Short answer
At 1200 baud, one bit time is 0.83 ms. A character with1 start,7 data,1 parity, and1 stop bit (10 bits) takes8.333 ms to transmit.
What is the time required for transmission of a character with one start bit, seven data bits, one parity bit, and one stop bit with 1200 baud?
Baud rate = number of signal elements (bits here) per second, so at 1200 baud the bit rate is 1200 bits/s (one signal element per bit).
Frame
Start bit + data bits + parity bit + stop bit = 1 + 7 + 1 + 1 = 10 bits per character.
Calculation
Bit time = 1 / 1200 = 0.8333 ms
Character time = 10 bits x 0.8333 ms = 8.333 ms
Characters per second = 1200 / 10 = 120 characters/s
Answer: 8.33 ms per character (about 120 characters per second). Only 7 of the 10 bits are information, so the effective data rate is 7 x 120 = 840 bits/s.
✓ Answer checked by Claude Sonnet 5.5
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