| 摘要 |
<p>PURPOSE:To make it easy to set or change a warning area, by using a start angle for the reference of an end angle when setting or changing an angle area in setting the warning area. CONSTITUTION:On the basis of azimuth information and angle information from antenna part 2, etc., a north signal and modulated angle signal are generated by signal processing circuit 3. Comparing circuit 6, when voltage v1 generated by azimuth angle setting circuit 8 for start angle setting in proportion to the aximuth agrees with the output voltage value of N-V converting circuit 4, transmits pulse (d) and also resets the output of N-V converting circuit 5. Comparing circuit 7, when voltage v2 generated by angular width setting circuit 9 for angular width setting from a start angle in proportion to the width agress with the output voltage value of N-V converting circuit, transmits pulse (f). Those pulses (d) and (f) are passed through FF10, AND circuit 16, etc., to send out signal (j) and only when signal (j) is at a high level, a video signal is sent to cathode-ray tube 17. This constitution facilitates the setting and change of warning areas.</p> |
