| 摘要 |
A distortion meter for indicating the distortion of a telegraphic signal includes a cathode ray tube, a deflection control arrangement for deflecting the electron beam to form the pattern of a closed polygon on the screen of the cathode ray tube, the length of the perimeter of the closed polygon corresponding to a prescribed degree of distortion and a beam control arrangement for controlling the electron beam to trace that portion of the polygon pattern corresponding to a measured degree of distortion. |
