| 摘要 |
PURPOSE:To improve the isolation between a recording signal and a reproducing signal and to attain a specified performance for the control of height of a video head at recording, by incorporating a reproducing amplifier to amplify a reproduced output of the video head in a rotary cylinder. CONSTITUTION:At reproduction, all switchs 8 are connected in the opposite position in figure. The reproducing signal from the video head 10 is amplified at the reproducing amplifier 12 incorporated in a rotary clinder the same as the video head and connected with the head with very short leads, and outputted to an output terminal 13 via a rotary transformer 9. The reproducing signal is split corresponding to the position on a magnetic tape of the video head 10 and given to a processing circuit of each signal. When the video head 10 is positioned on a blank part 5 at the preceding recording, only the channel is reproduced and the flow of the reproducing signal for the case is the same as that at the reproduction. Thus, the isolation is improved. |
