This standard specifies the measurement methods for the technical indicators of the audio channel of the broadcast control system, including the subject matter and scope of application. This standard is applicable to the measurement of technical indicators for broadcasting audio channels. 2. Reference standard GB 1779.16.30 mm broadcasting audio tape Performance testing methods GB 1779.26.30 mm broadcasting audio tape Minimum performance requirements GB 1780 Broadcasting audio tape test tape GB 1781 Broadcasting audio reference tape GB 5440 Broadcasting stereo audio tape recorder
GB 9003 Basic characteristics measurement methods for mixing stations
3 Terminology 3.1 Broadcasting channel Broadcasting channel Audio channel for transmitting broadcasting programs. This includes live channels, recorded channels, and live broadcast channels. 3.2 Direct broadcasting channel is a broadcasting channel that starts from the microphone input end of the mixer in the broadcasting room to the output end of the line amplifier. The 3.3 live broadcast channel is a broadcast channel that starts from the microphone input end of the mixer at the live broadcast point to the line amplifier output end of the broadcast control center. 3.4 Recorded broadcast casting channel is a broadcast channel that starts from the playback amplifier output end of the playback machine in the broadcasting room, that is, the playback head, to the output end of the line amplifier, and can record simultaneously. The 3.5 recording channel is an audio channel for recording radio programs, which starts from the microphone input end of the mixer and ends at the recording and playback output end of the recorder
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China