YD/T 685-1994
Quality grading criteria of four-way accompanying sound modem equipment for color TV analog terrestrial microwave relay system (English Version)
- Standard No.
- YD/T 685-1994
- Language
- Chinese, Available in English version
- Release Date
- 1994
- Published By
- Professional Standard - Post and Telecommunication
- Status
- 2009-12
- Latest
- YD/T 685-1994
- Scope
- This standard specifies the quality classification and requirements for four-way audio tone modulation and demodulation equipment for color television analog terrestrial microwave relay systems. This standard applies to four-way audio tone modulation and demodulation equipment for long-distance color TV analog terrestrial microwave relay systems, and is the basis for assessing the quality level of this product. This standard does not apply to product sorting.
YD/T 685-1994 history
- 1994 YD/T 685-1994 Quality grading criteria of four-way accompanying sound modem equipment for color TV analog terrestrial microwave relay system
