| 摘要 |
PURPOSE: To correct the angle without producing a distortion signal in a video signal of a reception output. CONSTITUTION: A pilot signal at its maximum amplitude is synthesized with an electric signal obtained by applying frequency modulation to a carrier by a frequency modulation section 2 at a synthesis section 6 only for a blanking period detected by a blanking detection section 3. The pilot signal whose amplitude is suppressed is synthesized for periods other than the blanking period. The synthesized electric signal is converted into an optical signal by an electrooptic conversion section 7 and the optical signal is sent from a lens system 10 through a 1st beam splitter 8 and a mirror angle drive mechanism section 9. Only a pilot signal is detected from a luminous flux reflected in a 2nd beam splitter 11 in the received light at an angle detection section 16 to generate deviation information. A mirror drive control section 17 drives the mirror angle drive mechanism section 9 based on the information to correct the deviation angle. |
