| 摘要 |
PURPOSE:To enable to correct automatically the difference of chroma signal left every channel, by setting the amplitude of the burst signal with one adjuster. CONSTITUTION:The reproduced RF signal a fed from the reproducing head is fed to the equalizer 1, the frequency characteristics of RF signal is controlled, the output signal b is fed to the demodulator 2, and the video signal c and the pilot signal d are demodulated. The video signal c is fed to the burst level detector 5 to detect the amplitude of the burst signal and a DC voltage proportional to it is made, it is compared with the reference signal g, the error signal is made, selection is made to channel at the channel switch 4, four error signal i1-i4 are obtained, and they are written in four memories 61-64. Write-in and readout are made for the error signal being the continuous signal having the different value every channel, and the reference signal f is fed to the pilot level detector 3. |
