Terminology
1.1 Audio channels include live streaming channels, recording channels, relay channels, recording channels, and replication channels 1.2 Line amplifier (line amplifier) refers to the line terminal amplifier in the audio channel, whose output enters program transmission equipment such as transmission cables, ultra short waves, or microwaves, and transmits broadcast programs to transmission stations or satellite ground stations. 1.3 The live broadcast channel is an audio channel that starts from the microphone input end of the mixer in the broadcasting room and ends at the output end of the line amplifier
1.4 The broadcasting channel is an audio channel that starts from the microphone input end of the broadcasting station at the broadcasting point, passes through a transmission circuit, and ends at the output end of the line amplifier in the broadcasting control center. 1.5 Recording channel is an audio channel from the playback head of the player in the broadcasting room to the output end of the line amplifier The audio channel for recording radio programs is the audio channel that runs from the microphone input end of the mixer to the playback output end of the recorder. 1.7 Copy Channel The audio channel for copying a broadcast program is the audio channel that starts from the playback head of the player and ends at the recording and playback output end of the recorder. The frequency used as a reference point during the operation technical index test of 1.8 reference boat rate is called the reference color rate, and this standard uses 1000 Hz as the reference frequency. 1.9 The working magnetic level indicates the remaining magnetic flux on the tape when the volume meter reaches the oVU scale. This standard recommends recording with reference frequency signals, using 255n Wb/m as the working magnetic level when the tape speeds are 38.1cm/s and 19.05cm/s
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