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    • 47. 发明申请
    • MAGNETIC RECORDER/REPRODUCER
    • 磁记录器/复印机
    • WO1979000715A1
    • 1979-10-04
    • PCT/JP1979000051
    • 1979-03-01
    • PIONEER ELECTRONIC CORPKADOWAKI HISHII SYANAGIDA KOHTAKE YINOMATA AHASEGAWA T
    • PIONEER ELECTRONIC CORP
    • G11B05/033
    • G11B5/027G11B5/02G11B5/035
    • The sound recording conditions of a magnetic tape such as bias, recording level, equalization, etc., are automatically set under a computer control in the following sequence instead of conventional manual controls. This setting sequence has the steps of varying (39) and subsequently recording a bias current of the magnetic tape, storing (10) the reproducing levels of the tape corresponding to respective bias current values, selecting the optimum recording bias current from the stored values, then varying (22) and subsequently recording the recording level, and comparing (10) the reproducing level of the tape with the reference value to thereby set the optimum recording level of the tape when the recording level coincides with the reference level as a result of the comparison, and the sequence further has the steps of varying (26) the equalizer amount of the tape to then record the reference signal, and comparing (10) the reproducing level with the reference level to thereby set the optimum equalizer amount of the tape when the reproducing level coincides with the reference level as a result of the comparison. This setting operation of the recording conditions of the magnetic tape is repeated several times to thereby obtain the mean value among the many set values for their accuracy.
    • 磁带的声音记录条件如偏置,记录电平,均衡等,按照以下顺序自动设置在计算机控制下,而不是传统的手动控制。 该设置顺序具有以下步骤:改变(39)并随后记录磁带的偏置电流,存储(10)对应于各个偏置电流值的磁带的再现电平,从存储的值中选择最佳记录偏置电流, 然后改变(22)并随后记录记录电平,并且将磁带的再现电平与参考值进行比较(10),从而当记录电平与参考电平一致时设置磁带的最佳记录电平,作为结果 比较,序列还具有改变(26)带的均衡器量然后记录参考信号的步骤,并且将再现水平与参考电平进行比较(10),从而设置带的最佳均衡器量 当再现级别作为比较的结果与参考水平一致时。 将磁带的记录条件的这种设置操作重复几次,从而获得许多设定值中的精度的平均值。