在异步通信中，每个字符包含1位起始位、7位数据位、1位奇偶位和2位终止位，若每秒钟传送l00个字符，采用4相相位调制，则码元速率为( )。
- A.50波特
- B.500波特
- C.550波特
- D.1100波特
正确答案及解析
正确答案
解析
根据题中给出的条件，每个字符要占用1+7+1+2=11(位)。每秒钟传送l00个字符，则数据速率为ll X l00=1100b／s。在采用4相相位调制的情况下，数据速率为码元速率的2倍，所以码元速率为550波特。
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