Automatic level setting device

Abstract

Abstract PURPOSE:To secure an automatic record of high quality free from the saturation distortion of the magnetic tape by performing the level setting with the digital control given to the signal attenuator groups distributed at the signal transmission line. CONSTITUTION:When the level setting mode is secured with push of switch 8, digital counter 5 delivers the count value equivalent to sample value 7, 10, 12 and 13 of every fixed period of level 6 where input signal 1 exceeds reference level 4. Thus the total attenuation quantity is controlled for resistance attanuator group 3 via latch circuit 14 and comparator 15. In case the recording level is set for the tape deck, output terminal 2 is connected to the record amplifier of the tape deck, and the record current is supplied to the magnetic head. At the same time, group 3 is set with switch 8 set so that the peak of the input signal may be recorded with the maximum recording level of the magnetic tape. As a result, an automatic high- quality recording is possible without any saturation distortion of the magnetic tape for the input signal.

Inventors

• 👤 Masao Tomita

Bibliographic Details