GOST 2.762-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and frequency bands for transmission systems

GOST 2.762-85 * UDC 003.62:621.3.049:002:006.354 s Group T52 Interstate standard Unified system for design documentation Graphical symbols in electrical circuits. Frequency and Frequency for transmission systems with frequency division multiplexing Unified system for design documentation. Graphic designations in diagrams. Frequencies and frequency ranges for transmission systems with frequency division of channels OKS 0002 Resolution of the USSR State Committee on Standards of March 18, 1985 № 608 deadline for implementing the set with 01.01.1987 * edition (October 2000) with Amendment number 1, approved in March 1994 (MIS 5-94) This standard establishes a conditional graphical notation of frequencies and frequency bands for transmission systems with frequency division multiplexing in the electrical circuits to be performed manually or automated way of products for all industries. (Revised edition, Alt. № 1). 1. Conditional graphical notation frequencies are given in Table. 1. Table 1: Name Designation 1. Note the frequency axis. Under the head of the arrow can be specified marks (f) or units (Hz, kHz, MHz, GHz, etc.) 2. Carrier frequency. General designation 3. The frequency of the carrier suppressed 4. Partially suppressed carrier frequency 5. Frequency control. The total mark 6. Frequency Control crushed 7. Primary frequency control group 8. Frequency control of the secondary group 9. Frequency Control tertiary group 10. The frequency of the control group or a quaternary group of 15 secondary groups of 11. Two control frequencies, each of which is non-transferable 12. Frequency measurement. General designation 13. Frequency measurement with the transfer of on-demand 14. Frequency signal 15. Signaling channel 2. Conditional graphical notation of frequency bands of channels and channel groups are listed in Table. 2. Table 2: Name Designation 1. The range of frequencies a channel or group of channels as well) the general term b) in direct order) in reverse order g) in an undefined order g) suppressed the band, for example, in direct order 2. Frequency range of the primary group (12 channels) 3. Frequency range of the secondary group (60 channels) 4. Frequency range tertiary group (three hundred channels) 5. Frequency range quaternary groups or units of 15 secondary groups (900 channels) Notes: 1. Allowed numbered the number of channels in the group, for example, twelve. 2. Dividing the frequency band into channels, groups, etc. may be given a corresponding number of vertical lines, such as bandwidth, concluded between f1 and f2, is divided into five channels, groups, etc. 6. The primary group consists of 12 channels in a direct manner. Detailed description (shown only 4 channels of 12) 7. The primary group consists of 12 channels in the reverse order. Detailed description (shown only 4 channels of 12) Examples: 1) Frequency range three-way telephone systems with double sideband frequencies: Channel 3 in reverse order in the range from 4 to 16 kHz for one direction of transmission; 3 channels in direct order in the range from 18 to 30 kHz for the other transmission direction 2) Frequency range six-channel telephone systems with double sideband frequencies to transmit carrier frequencies, and lower side bands are suppressed in the reverse order, and shows only the range of 16 to 60 kHz for one transmission direction 8. Secondary group, consisting of 5 primary groups in a mixed order (second primary group in direct order) 9. Secondary group, consisting of 5 primary groups in a direct manner. Detailed mark 10. Secondary group, consisting of 5 primary groups in a direct manner. Simplify the notation 11. Tertiary group consisting of 5 secondary groups in reverse order. Detailed notation 12. Tertiary group consisting of 5 secondary groups in reverse order. Simplify the notation 13. Quaternary group or a group of 15 secondary groups in a mixed manner in which most of the channels is in direct order. Simplify the notation 14. Quaternary group or a group of 15 secondary groups in a mixed manner in which most of the channels is in the reverse order. A simplified example of the notation. Frequency range of 15 secondary groups in reverse order, consisting of 14 secondary groups in reverse order, and one secondary group in direct order. Simplified notation Notes: 1. Beginning and end of the frequency range of channels according to Table. 2, paragraph 1, listing a-d denote the allowed values ??of the frequencies f1 and f2. 2. Legend bandwidth according to Table. 2, pp. 2.5 are in direct order. Legend in the reverse order is carried out as described in Section 1, listed in. 3. Aspect ratio of conventional graphic symbols of frequencies and frequency bands with a frequency division multiplexing is presented in a background application. (Revised edition, Alt. № 1). Annex Background Ratio CONDITIONAL GRAPHICAL SYMBOLS Frequency and Frequency With frequency division title Picture 1. Frequency control. Overall reference 2. Secondary group, consisting of 5 primary groups in a direct manner. Detailed notation Published 07/07/2008 GOST on "Electrical, lighting, security systems," GOST 15597-82 Fixtures for industrial buildings. General specifications GOST 2.702-75 Unified system for design documentation. Rules for making electronic circuits with GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams. Robot device GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Device switching and contact connections GOST 2.756-76 * Unified system for design documentation. Graphical symbols in diagrams. 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