The methods of measurement described in this International Standard concern the assessment of the performance of non-broadcast video tape recorders of the so-called "colour under" type for domestic use. This standard defines test signals, measurement set-ups and measurement conditions for non-broadcast video tape recorders of the so-called "colour under" type for domestic use, so as to make possible the comparison of the results of measurements. Specifying limiting values of the various quantities for acceptable performance is not an object of this standard. The methods of measurement are designed to make possible the assessment of the performance of the complete recorder by using the input/output terminals of the device. NOTE - Measuring methods for consumer camcorders (camera-recorders). are under consideration.