| 摘要 |
<p>PURPOSE:To generate a desired STC signal by storing in advance a data of an STC (sensitive time control) signal curve adapted to an input signal to a receiver, reading out a suitable data in accordance with a state, and converting it to an analog. CONSTITUTION:A data of an STC signal adapted to an input signal to a receiver is stored in a memory 1, a stored data on an address of the memory 1 is read out successively by an address control part 2, an address is stepped by receiving a trigger signal, and the stepping is stopped by receiving an STC effective distance range signal. Also, a digital-analog converting part 3 converts a read-out data from the memory 1 to an analog, and executes an adjustment of an STC level. Aubsequently, a control signal which has superposed a DC portion of a gain adjusting signal on the STC signal which is adjusted by an adder 4 is supplied to an amplifier of a receiving part. In such a way, a signal corresponding to a state is selected, and a disturbance of a sea surface reflection can be eliminated.</p> |
