| 摘要 |
<p>PURPOSE:To enable radar information to be continuously sent to a signal processing section without causing any saturated state of a radar by instantaneously holding properly working AGC voltage, even when the position of an input signal enters a transmission time zone in a high PRF pulse radar. CONSTITUTION:When a target position or an input signal position begins to gradually move and comes within the zone where an input signal interferes with a signal transmission time, a video position detecting circuit 14 becomes unable to detect a pulse signal outputted from an amplitude detector A13. Then, the circuit 14 instantaneously generates a control signal HAGC to instruct an AGC circuit 16 to hold the output voltage VAGC thereof unchanged from state at that instant. Furthermore, the position of the target position or input signal continues to move, and the input signal again comes to a position outside the transmission time zone. In this case, the detecting circuit 14 detects a pulse signal outputted from the detector A13 and, therefore, the control signal HAGC to the AGC circuit 16 is interrupted. Then, the operation of a tracking radar is restored to normal state.</p> |
