| 摘要 |
<p>PURPOSE:To send data to a data transmission object radar and put the ECM in operation in other cases by bringing a stored high frequency signal lead-out diode switch in ON/OFF control with a code signal based upon sent data contents. CONSTITUTION:A radar signal is distributed by a high frequency distributor 13 and passed through a high frequency band-pass filter 14 when matching its band, and a detector 15 performs video detection. A switching trigger timing generating circuit 16 generates the operation timing of a code switching control circuit 12 according to the video detection result only when the data transmission object radar wave is received. Then coded sent data generated by a transmission radar generating circuit 11 is inputted to the circuit 12 to perform gating control at the operation timing, thereby generating a code switching control signal. The diode switch 6 is brought under the ON/OFF control through a signal changeover switch 10 with the control signal. The switch 10 is on the side of the circuit 12 in the operation timing of the circuit 12 and switched to the side of the delay switching control circuit 9 at other times.</p> |
