GB 4575-1984 Frequency comparison pilot series for frequency division system of long-distance communication network

This standard applies to frequency division multi-channel systems in long-distance communication networks, namely symmetrical cable carrier systems, small coaxial cable carrier systems and microwave carrier terminal equipment. GB 4575-1984 Frequency comparison pilot series for frequency division systems in long-distance communication networks GB4575-1984 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T4575—1984
Frequency comparison pilot series for the FDM systems
in the toll communication networkPublished on July 17, 1984
National Bureau of Standards
Implementation on April 1, 1985
National Standard of the People's Republic of China
Frequency comparison pilot series for the FDM systems
in the toll communication networkUDC621.395
.37.029
GB/T4575—1984bZxz.net
This standard applies to frequency division multichannel systems in toll communication networks, namely symmetrical cable carrier systems, small coaxial cable carrier systems and microwave carrier terminal equipment.
1 Frequency comparison pilot series
1.1 Series n·60kHz (n is a positive integer) 1.2 Frequencies 60kHz, 300kHz, 1800kHz and 4200kHz 2 Frequency comparison pilot frequencies of each frequency division multi-channel system 2.1 Symmetrical cable carrier system
2.1.1 60-channel system 60kHz
2.1.2 120-channel system 60kHz
2.2 Small coaxial cable carrier system
2.2.1 120-channel system 60kHz
2.2.23 00-channel system
2.2.3960-channel system
60kHz (4200kHz when necessary)
2.2.43600 (2700)-channel system
2.3 Microwave carrier terminal equipment
2.3.160-channel terminal equipment
2.3.2120-channel terminal equipment
2.3.3300-channel terminal equipment
Additional notes:
4200kHz
This standard was proposed by the Ministry of Posts and Telecommunications and is under the jurisdiction of the Telecommunications Transmission Research Institute of the Ministry of Posts and Telecommunications. This standard was drafted by the Telecommunications Transmission Research Institute of the Ministry of Posts and Telecommunications. The main drafters of this standard are Luo Jianguo and Sun Zhiying. Issued by the State Bureau of Standards on July 17, 1984
Implementation on April 1, 1985
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