IEC 62122 pdf download Methods of measurement for consumer-use digital VTRs – Electronic and mechanical performances 1Scope and object This standard specifies the basic methods of measurement for evaluating the electronic andmechanical performances of consumer-use digital VTRs. The formats of open reel VTRs,Beta,VHS, and 8 mm VTRs have been standardized.Methods ofmeasurement for these analogue VTRs have been standardized in lEC...