Video Recording Amplifier

46 VIDEO RECORDING AMPLIFIER When video tapes are copied directly, some loss of quality is inevitable. The amplifier presented here prevents this deterioration and also provides four separate outputs to make it suitable for use as a distribution amplifier. One criterion in the judging of the qual- ity of a video recording is the resolution or definition, that is, picture clearness, which is related directly to the band- width the video recorder can handle. During re-recording, some deterioration of picture quality occurs because the bandwidth is reduced to a degree that depends on the recording system. This reduction manifests itself primarily in a greater attenuation at the high-fre- quency end of the signal than at the low- frequency end. Further loss of quality may occur through a lowering of the overal modu- lation level, particularly when two or more video recorders, or a video recorder and a colour television monitor, are connected in tandem to the output of the master telev...