Sweep system |
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| 申请号 | JP5025981 | 申请日 | 1981-04-03 | 公开(公告)号 | JPS57165776A | 公开(公告)日 | 1982-10-12 |
| 申请人 | Mitsubishi Electric Corp; | 发明人 | YAMANE HIDEO; | ||||
| 摘要 | PURPOSE:To shorten the locking time without deteriorating the lock sensitivity of a frequency following loop by imparting the function of changing over the sweep velocity to the frequency following loop. CONSTITUTION:When signal in the Doppler range is applied to the mixer 1, the sweep circuit 7 applies first sweep signal of high speed to a voltage control oscillator 10 through a summing amplifier 8 and so on. Next, the output signal of the mixer 1 changes its frequency in response to the sweep signal. When this frequency exceeds the set value of a lock judgement circuit 5, it is stored in the memory circuit 6, and next, the content in the memory circuit 6 is applied to the sweep circuit 7 during sweeping and the sweeping speed becomes slow by the portion of the frequency that is stored in the memory circuit 6. With imparting the function to change-over sweep speed to the frequency following loop, the locking time can be shortened without deterioration lock sensitivity. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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