Synchronization of 6.3 mm tape recorders using EBU time and control code

The paper discusses the addition of EBU time and control code to the twin-track format on 6.3 mm tape recorders. The code is carried on a centre track 0.8 mm wide using a recording characteristic of zero microseconds so that the system can read the code accurately over a wide range of tape speeds. To preserve the waveshape, the recording amplifier has phase-corrected equalization; and to minimize noise, the equalization of the reproducing chain is split into two parts using head loading for highfrequency compensation followed by a low-frequency circuit in the amplifier.