| 摘要 |
PURPOSE:To ensure trial indication of the video signal of a sonar for example by adding some circuits including a counter counting direction synchronizing pulses and set in accordance with distance synchronizing pulses to an oscilloscope of general type. CONSTITUTION:Directional angle theta is calculated from the count output of a counter counting direction synchronizing pulses 3 and reset in accordance with distance synchronizing pulses 2. The signal obtained through the D/A conversion of the angle theta is fed to the vertical axis input Y of an oscilloscope 17, and distance reference pulses 1 are inputted to the trigger input of a horizontal axis and fed to the brightness modulation input Z of video signal 4. Therefore, vertical or horizontal scavenging is made in accordance with the signal representing directional angle theta or in accordance with distance R and brightness indication is performed in accordance with the video signal 4 based on the scavenging. |
