| 摘要 |
<p>PURPOSE:To enable a smooth switching with an automatic correction of a gap at a switching point by determining the difference in the sensitivity time control (STC) voltage after and before the switching when a switching signal is generated corresponding to a specified distance and bearing in a radar receiver to be added to or subtracted from other STC control voltages after the switching thereof. CONSTITUTION:A differential voltage is determined with an adder 19 between two STC control voltages outputted from adders 16 and 17 and fed to a gate circuit G20. When a switching signal is generated at the distance r1, the differential voltage is fed to an adder 21 with the output of the adder 16 and subtracted therefrom and results are outputted from a selection circuit 18 so that the R<4> characteristic will be switched over to the R<2> characteristic smoothly at the distance r1 and the R<2> characteristic is set in the range of distances r1-r2. A differential voltage is determined with an adder 22 between outputs of adders 17 and 21 and fed to a gate circuit G23. When a switching signal is generated at the distance r2, the differential voltage is fed to an adder 24 with output of the adder 17 and outputted from the selection circuit 18 so that the R<2> characteristic will be switched over to the R<4> characteristic without gap at the distance r2 and the R<4> characteristic is set in the range of distances r2-R.</p> |
