title>GB/T 11444.3-1989 Technical requirements for transmitting, receiving and ground communication equipment of domestic satellite communication earth stations Part 3: Television/FM equipment - GB/T 11444.3-1989 - Chinese standardNet - bzxz.net
Home > GB > GB/T 11444.3-1989 Technical requirements for transmitting, receiving and ground communication equipment of domestic satellite communication earth stations Part 3: Television/FM equipment
GB/T 11444.3-1989 Technical requirements for transmitting, receiving and ground communication equipment of domestic satellite communication earth stations Part 3: Television/FM equipment
Basic Information
Standard ID:
GB/T 11444.3-1989
Standard Name: Technical requirements for transmitting, receiving and ground communication equipment of domestic satellite communication earth stations Part 3: Television/FM equipment
Standard ICS number:Telecommunications, audio and video technology>>Wireless communications>>33.060.30 Wireless relay and fixed satellite communication systems
Standard Classification Number:Communications, Broadcasting>>Communication Equipment>>M35 Satellite Communications Equipment
associated standards
Publication information
other information
Release date:1989-06-10
Review date:2004-10-14
Drafting unit:Department of Mechanical and Electrical Engineering 54
Focal point unit:Ministry of Information Industry (Telecommunications)
Publishing department:Ministry of Information Industry (Telecommunications)
competent authority:Ministry of Information Industry (Telecommunications)
This standard specifies the technical requirements for television transmission and reception equipment in satellite communication earth stations, except for antenna subsystems and terminal equipment subsystems. This standard applies to the establishment, technical transformation and manufacturing of satellite communication earth stations. GB/T 11444.3-1989 Technical requirements for transmission, reception and ground communication equipment of domestic satellite communication earth stations Part 3: TV/FM equipment GB/T11444.3-1989 Standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China GB/T 11444.3—1989 Technical requirements for transmitting, receiving and ground communication equipment used in domestic satellite communication earth stations Part 3: Equipment for television/frequency modulation Transmitter, receiver and ground communicationequipment used in domestic satellite communicationearth stationsTechnical reguirements-Part 3:Equipment for television/frequency modulationPromulgated on July 4, 1989 Implemented on March 1, 1990 Promulgated by the State Administration of Technical Supervision National Standard of the People's Republic of China Technical requirements for transmitting, receiving and ground communication equipment used in domestic satellite communication earth stations Part 3: Equipment for television/frequency modulation requirementsPatr3: Equipment for television/frequency modulation1 Subject content and scope of application GB/T11444.3—1989 This standard specifies the technical requirements for television transmission and reception equipment in satellite communication earth stations, except for antenna subsystems and terminal equipment subsystems. This standard applies to the establishment, technical transformation and technical basis of equipment manufacturing of satellite communication earth stations. 2 Reference standards GB 11443.1 GB11443.4 3 Equipment composition General technical requirements for domestic satellite communication earth stations Part 1 General requirements General technical requirements for domestic satellite communication earth stations Part 4 TV/FM carrier channel equipment consists of transmitting equipment, receiving equipment, TV channel equipment and other units. See Figure 1 for a typical block diagram. Each functional unit can be a single device or several functional units can form a device. The interface level between each unit is a recommended typical value. Each functional unit should generally have a main and a standby and be adaptable to automatic or manual switching. 1 High momentum Amplifier Designated Receiver Micro-device Arranged Group Evidence Micro-strip Figure 1 Block diagram of transmitting, receiving and ground communication (TV channel) equipment State Technical Supervision Bureau 1989-07-04 Approved by the State | |tt||Semi-production Companion guard solution 1990-03-01 implementation 4 Equipment working conditions a. Temperature: 5~40℃; b. Relative humidity: 5%~85%, c. Air pressure: 70~106kPa,wwW.bzxz.Net GB/T11444.3—1989 d. Power supply: single-phase AC, voltage 220±22V, frequency 50±1Hz. Note: High power amplifier uses three-phase AC power supply, voltage 380±38V, frequency 50±1Hz. 5 Equipment input and output connectors 5.1 RF Coaxial L16-50K 5.2 IF Coaxial Q9-75K 5.3 Baseband Coaxial Q9-75K 5.4 High power amplifier output FDM-70 waveguide flange 5.5 Low noise amplifier input FDM-40 waveguide flange 6 Transmitter Includes high power amplifier and medium power amplifier. High power amplifier is usually a klystron amplifier or a traveling wave tube amplifier. 6.1 High power amplifier 6.1.1 Frequency range 5925~6425MHz (or extended to 5850~6650MHz)6.1.2 Saturated output power Classification into three categories: Nominal value A. 3kW (34.8dBW) B. 1 kW (30 dBW) C.0.4kW(26dBW) Note: Waveguide flange output. 6.1.3 Bandwidth Minimum value 2.7kW(34.3dBW) 0.9kW(29.5dBW) 0.36kW(25.6dBW) Klystron high power amplifier:>36MHz(in-band gain fluctuation 1dB)Traveling wave tube amplifier:>500MHz(in-band gain fluctuation 3dB)6.1.4 Gain (6dB below saturated output power) is divided into three levels when including medium power amplifier: A.≥75 dB B.≥70 dB Not including medium power amplifier:≥37dB 6.1.5 Gain slope Not worse than ±0.05dB/MHz (fo±18MHz)Note: f. is the center frequency of the working frequency band, the same below. 2 6.1.6 Gain stability GB/T11444.3—1989 Gain stability is not less than ±0.5dB/d (constant excitation, constant temperature) 6.1.7 RF level adjustment 0~20dB continuously adjustable 6.1.8 Amplitude/frequency characteristics ≤0. 4dBpβ (fo±14. 4MHz) <1.0dB,-,(fo±18MHz) 6.1.9 Input standing wave ratio Klystron amplifier: 1.25:1 (max)TWTA amplifier: 1.3:1 (max)6.1.10 Output standing wave ratio (cold state) Klystron amplifier: 1.25:1 (max)TWTA amplifier: 1.3:1 (max)6.1.11 Load standing wave ratio Klystron amplifier: 2.0:1 (max)TWTA amplifier: 1.5 :1 (maximum) 6.1.12 Multi-carrier intermodulation ratio <-24dBc (when the total power of two equal carriers is 7dB lower than the saturated output power of a single carrier) 6.1.13 AM/PM conversion coefficient Klystron amplifier: <4/dB (when it is 6dB lower than the saturated output power) Traveling wave tube amplifier: <3%/dB (when it is 6dB lower than the saturated output power) 6.1.14 Residual AM <—-40dBc (F.<4kHz) ≤—20(1+lgF)dB c (4kHz Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.