| 摘要 |
<p>PURPOSE: To prolong the recording time of radar signal information by reducing the band width per channel by giving a prolonged pulse which is coincident with the leading edge of a master trigger pulse and having relatively prolonged duration. CONSTITUTION: A parallel-series converter 21 receives azimuth data through a plurality of parallel lines and serially inputs the data to a recording and reproducing device 13. A pulse prolonging device 23 having a one-shot multivibrator receives a master trigger signal and outputs a high-speed rising output pulse which is coincident with the leading edge of a master trigger pulse. By appropriately selecting the time constant of the multivibrator, the duration of the prolonged master trigger pulse is made coincident with the band width of a channel to be recorded. The prolonged output pulse of the device 23 is given to a detector 15 and the elongated mater trigger pulse is periodically sampled at a certain multiple of the internal clock speed. The prolonged master trigger signal minimizes the sampling error and reduces the band width required for recording.</p> |
