Helical-scan video tape cassette system using 12,65 mm (0,5 in)
magnetic tape on type Beta format - FM audio recording - Part 1:
625 line-50 field systems
螺旋扫描录像带系统使用12,65毫米(0.5英寸)磁带类型Beta格式 - FM录音 - 第1部分:625行-50现场系统
Defines the electrical and mechanical characteristics of FM audio
recording which provides for the interchangeability of recorded
cassettes. The requirements given relate to 625 lines-50 field
systems. Applies to frequency modulation (FM) audio recording on
video recorders fully compatible with the beta format for 625
lines-50 field television systems defined in IEC 60767.