| 摘要 |
PURPOSE:To obtain the relay system high in the reliability, by arbitrarily setting the identified frequency for remote control, through the generation of an arbitrary frequency component between basic frequencies having the pattern different repetitive period in the digital signal. CONSTITUTION:When a word detector 1 in a pseudo random signal generator PNG1 detects the specific bit pattern preset in the shift register S1, the detected pulse 2 is fed to a pseudo random signal generator PNG2. This detector 1 is set so that the pseudo random signal Q outputted from the generator PNG1 can be periodical m-bit, and the generator PNG2 generates the pseudo random signal Px in m-bit interval. Further, when the signal Px is 1, the clock CK3 is blocked, and n-bit is made by adding 1 to the signal Q and m-bit is made when the signal Px is 0. Further, an arbitrary frequency component between the basic frequency fm=fb/m having bit rate fb and the pattern of repetitive period m and the basic frequency fn=fb/n having the pattern of repetitive period m, is generated in digital signal. |
