This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of satellite TV earth receiving stations. This standard applies to C-band satellite TV earth receiving stations with color TV system PAL-D, and also applies to TV earth stations compatible with communications. GB/T 11442-1995 General Technical Requirements for Satellite TV Earth Receiving Stations GB/T11442-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
General Specification for Satellite Television Earth Receive-Only Station
1 Subject Content and Scope of Application
GB/T 11442--1995
Replaces GB11442-89
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of satellite television earth receiving stations. This standard applies to satellite television earth receiving stations in the C band with the color television system of PAL-D, and also to television earth stations compatible with communications.
Satellite television earth receiving stations with other PAL color television systems or other segments with a color subcarrier frequency of 4.43MHz can be used for reference.
2 Reference standards
GB 2828
GB2829
GB6114
Packaging, storage and transportation pictorial marking
Batch inspection counting sampling procedure and sampling table (applicable to the inspection of continuous batches) Periodic inspection counting sampling procedure and sampling table (applicable to the inspection of the stability of the production process) Broadcast receiver interference characteristic measurement method
GB7236
Broadcast receiver interference characteristic limit value
GB8898
Safety requirements for household and similar general purpose electronic and related equipment powered by mains power supply GB11298.1 Satellite TV earth receiving station measurement method System measurement GB 11298. 2
Satellite TV earth receiving station measurement method Antenna measurement GB 11298. 3
Satellite TV earth receiving station measurement method Outdoor unit measurement Satellite TV earth receiving station measurement method Indoor unit measurement GB 11298. 4
3 Product classification
3.1 Classification
Satellite TV earth receiving stations are divided into two categories according to technical performance: professional and popular. a. Professional: Its performance can meet the requirements of receiving and transmitting or collectively receiving satellite TV programs. b. Popular: Its performance can meet the requirements of directly receiving satellite TV programs. 3.2 Equipment composition
Satellite TV earth receiving stations are composed of antennas and receivers. The receiver includes an outdoor unit (down converter) and an indoor unit (tuner demodulator), as shown in Figure 1. An L-band power divider can be connected between the outdoor and indoor units, which can receive multiple TV programs transmitted by the same satellite in real time.
Approved by the State Bureau of Technical Supervision on April 25, 1995, 50
Implemented on December 1, 1995
4 Technical requirements
4.1 System part
4.1.1 General requirements
4.1.1.1 Image output form
Outdoor unit
GB/T11442-1995
Power divider
Receiver
Indoor unit
Figure 1 Equipment composition of satellite TV earth receiving station Number of ports: ≥3 (professional type including composite baseband output); ≥2 (popular type);
Impedance: 75Q (unbalanced);
Level: 1V (peak-to-peak) (positive polarity).
4.1.1.2 Audio output form
Number of ports: ≥2;
Impedance: 6000 (unbalanced);
Level: 0±6dBm adjustable.
4.1.1.3 Connection cable
Loss: ≤5dB,
Length: 10, 20.30m,
When a 30m cable is connected between the outdoor and indoor units, the reception quality is not affected. 4.1.1.4 Power divider
Connection port: FL1o-ZY1 (output, input); Number of ports: 2, 4
Isolation: ≥20dB;
Insertion loss: ≤0.5dB;
Return loss: ≥17dB (input and output ports). 4.1.2 Electrical performance requirements
4.1.2.1 Professional electrical performance requirements are shown in Table 1. Video image signal
-Audio signal
Composite baseband signal
Technical parameters
Receiving frequency band
Quality factor (G/T)
Static threshold value (C/N)
Gain stability
Differential gain distortion (DG)
Differential phase distortion (DP)
GB/T11442—1995
Table 1 Performance requirements for professional satellite TV receiving stations Unit
Brightness/chrominance gain inequality
Brightness/chrominance delay inequality (△t)
Image signal-to-noise ratio (S/N)
Audio signal-to-noise ratio
Audio harmonic distortion
Receiver power consumption
Popular electrical performance requirements are shown in Table 2.
Technical parameters
Receiving frequency band
Quality factor (G./T)
Antenna aperture
3.7～4.2
≥35.5 (weighted but not weighted value)
RMS measurement (not weighted value)
Performance requirements for popular satellite TV receiving stations Unit
Antenna aperture
(G/T)≥(G/T)
f(GHz)
Antenna elevation angle is 20°
See Appendix G (reference)
See Appendix G (reference)
0. 04≤/(kHz)≤0. 13
0. 13≤f(kHz)≤7. 5
(G/T)≥(G/T)
f(GHz)
Antenna elevation angle is 20°
Technical parameters
Static threshold value (C/N)
Gain stability
Differential gain distortion (DG)
Differential phase distortion (DP)
Brightness/chrominance gain inequality
Brightness/chrominance delay inequality (At)
Image signal-to-noise ratio (S/N)
Audio signal-to-noise ratio
Audio harmonic distortion
Receiver power consumption
4.2 Antenna
4.2.1 General requirements
4.2.1.1 Working conditions
GB/T 11442—1995
Continued Table 2
Antenna Caliber
Unless otherwise specified, the antenna should work under the following conditions. Wind resistance:
Wind force 8: normal operation;
Wind force 10: reduced accuracy operation;
Wind force 12: no damage (antenna locked toward the sky); Ambient temperature: -25~55℃;
Relative humidity: 5%~95%;
Air pressure: 86~106 kPa.
4.2.1.2 Polarization mode
233 (weighted but not weighted value)
RMS measurement (not weighted value)
See Appendix G (reference part)
See Appendix G (reference part)
0. 08≤f(kHz)≤0. 13
0. 13≤/(kHz)≤3. 0
3. 0≤/(kHz)≤7. 5
RF polarization can be easily changed to left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), linear polarization (LP). 4.2.1.3 Feed output connection
Connection flange: FD-40
4.2.1.4 Appearance
There should be no obvious defects such as paint peeling, deformation, scratches, rust, etc. 4.2.2 Electrical performance requirements
The electrical performance requirements of the antenna are shown in Table 3.
Technical parameters
Receiving frequency band
Antenna gain (G.)
Antenna subsystem efficiency (n)
Circular polarization voltage axis ratio
Antenna noise temperature
GB/T 11442--1995
Table 3 Antenna electrical performance requirements
Antenna aperture
1.8,2.0,2.4
1.8,2.0,2. 4
+20lg f(GHz)
Applicable to 1.2~2.4m
Offset-fed antenna
At an elevation angle of 10°
At an elevation angle of 20°
Technical parameters
Standing wave coefficient
Cross-polarization discrimination rate
Antenna first sidelobe level
Antenna wide-angle sidelobe envelope
Antenna pointing adjustment model
4.3 Outdoor unit
4.3.1 General requirements
4.3.1.1 Normal working conditions
GB/T 11442-
Continued Table 3
Antenna aperture
Single offset antenna
Single offset antenna should be 8dB lower than the feedforward antenna
The 90% point of the peak value of the wave ring should not exceed the envelope. The envelope formula is: When D/1≤100, 52---10lg(D/A)—251g8C(100A/D)≤6<20°)When D/α>100, 32—251g0(1<<20°)1. 2~~2. 4
If not otherwise specified, the unit should work normally under the following conditions. Ambient temperature: -25~~55℃;
Relative humidity: 5%~95%;
Air pressure: 86~106kPa.
4.3.1.2 Connection method
Input port: FDM-40;
Output port: FL10-ZYI.
4.3.1.3 Power supply method
Voltage: 18±1V (DC);
Current: ≤150mA.
4.3.1.4 Appearance
Pitch 5°～85°Azimuth 0°～360°
Pitch 0°～90°Azimuth ±90°
Pitch 0°~90°Azimuth ±70°
There should be no obvious cracking, deformation, scratches, paint peeling and rust. 4.3.2 Electrical performance requirements
The electrical performance requirements are shown in Table 4.
Table 4 Electrical performance requirements for outdoor unit
Working frequency band
Technical parameters
Amplitude/frequency characteristics
Power gain fluctuation within passband
Bee-bee value bandwidth 500MHz
Technical parameters
GB/T 11442--1995
Continued Table 4
Gain fluctuation in any receiving channel within the band
Power gain
Noise temperature
Nominal frequency of a local oscillator
Local oscillator frequency stability
Input sum level
Image interference suppression ratio
Input port return loss
Output port return loss
Multi-carrier intermodulation ratio
Gain stability
Output frequency range
4.3.3 Electromagnetic compatibility requirements
Local oscillator leakage level: ≤-50dBm.
4.3.4 Environmental adaptability
Environmental test requirements are shown in Table 5.
5170±2
≤7.7X10-4
≥-60
970～1470
Table 5 Environmental test requirements
Equipment classification
Test items
Low-temperature storage
Low-temperature operation
High-temperature operation
High-temperature storage
Wet heat test
Outdoor unit
Temperature: 40±3℃
Time: 8h
Temperature: -25±3℃
Time: 2h
Temperature: 55±3℃
Time: 2h
Temperature: 60±3℃
Time: 8h
Temperature: 40±3℃
Relative humidity: 90%~95%
Test time: 48 h
Power gain fluctuation within the channel
Bee-to-bee bandwidth 36MHz
20～25℃
25～—55℃
Input level at 1 dB compression point
Frequency interval 4MHz, level -70dBm
Indoor unit
Temperature: —40±3℃
Time: 8h
Temperature: 5±3℃
Time: 4h
Temperature: 40±3℃
Time: 4h
Temperature: 60±3℃
Time: 8h
Test items
Vibration test
(three directions)
Impact test
Transportation test
Equipment classification
GB/T 11442—1995
Continued Table 5
Outdoor unit
Frequency: 10~30~10Hz, single amplitude 0.55mm30~50~30Hz, single amplitude 0.10mm
Scan once every 3min, total scan 30minAcceleration: 147m/s2
Number: three times
Impact direction: positive direction
Indoor unit
Drive 200km on a third-class highway at a speed of 20~30km/h. The truck should be properly weighted. Note: Appearance inspection and electrical performance test should be carried out before the test. Only products that meet the requirements of the standard can be subjected to environmental testing. 4.3.5 Reliability requirements
The lower limit of the mean time between failures (MTBF)6, ≥7000 h. 4.4 Indoor unit
4.4.1 General requirements
4.4.1.1 Normal working conditions
If not otherwise specified, the unit (including power distributor) shall operate normally under the following conditions. Ambient temperature: 5~40℃;
Relative humidity: 45%~～75%;
Pressure: 86~106 kPa:
Power supply: voltage 220V±10%;
Frequency 50±2Hz.
4.4.1.2 Video image signal
Image baseband: 6MHz (professional type),
5MHz (popular type);
Signal polarity: positive polarity;
Signal amplitude: 1V (peak-to-peak);
Brightness signal: 0.7V (peak-to-peak);
Sync signal: 0.3V (peak-to-peak).
4.4.1.3 Image output form
Number of ports: ≥3 (Professional type includes one composite baseband output); ≥2 (Popular type);
Impedance: 75Q (unbalanced),
Output level: 1V (peak-peak) ±1dB adjustable; Connecting port: C-3-1 (socket).
4.4.1.4 Audio output form
Number of ports: ≥2:
Impedance: 6002 (unbalanced);
Level: 0±6dBm adjustable;
Connecting port: C-3-1 (socket).
4.4.1.5 Input connection form
Connecting port: FL10-ZY1.
4.4.1.6 De-emphasis characteristics
GB/T 11442--1995
Image de-emphasis characteristics: consistent with the characteristics of the transmitting end, see Appendix C (supplement); Audio de-emphasis characteristics: consistent with the characteristics of the transmitting end, see Appendix E (supplement). 4.4.1.7 RF output (modulator output) level: ≥70dBμV;
Impedance: 75Q;
Number of channels: ≥2.
4.4.1.8 Appearance
The casing and panel should not have obvious cracks, deformation, scratches, paint peeling and rust. Buttons and knobs should be flexible and the markings should be clear. 4.4.2 Electrical performance requirements
4.4.2.1 Professional electrical performance
Professional electrical performance requirements are shown in Table 6.
Professional electrical performance requirements for indoor units
Technical parameters
Working frequency band
Number of pre-selected channels
Input level range
Noise figure
Second local oscillator frequency stability
3dB bandwidth of mid-cheek filter (B)
Image interference suppression ratio
Static threshold value
Gain stability
Continuous random clutter signal-to-noise ratio (S/
Single frequency interference signal-to-noise ratio
Power supply interference signal-to-noise ratio
Pulse interference signal-to-noise ratio
Color cross-interference modulation
Energy diffusion elimination ratio
K coefficient
Field time waveform distortion (Kso)
9701470
60～—30
≥35.5 (emphasized unweighted value)
(1±2K) or ±3%
5~40℃
See Appendix A (Supplement)
See Appendix G (Reference)
Ratio of audio color subcarrier beat product
to image signal
Image signal to residual diffusion signal
See Appendix B (Supplement)
Technical parameters
Line time waveform distortion (Kb)
2T wave amplitude distortion (K)
2T wave distortion (K.)
Regulated frequency response
Brightness/chrominance gain inequality (AK)
Brightness/chrominance delay inequality (AK)
Differential gain distortion (DG)
Differential phase distortion (DP)
Sync pulse distortion
Regulated frequency return loss
Audio subcarrier frequency adjustable range
Audio band
Audio frequency response
Audio harmonic distortion
Audio signal-to-noise ratio (S/N)
4.4.2.2 Popular electrical performance requirements
Popular electrical performance requirements are shown in Table 7.
GB/T 11442—1995
Continued Table 6
(1±K) or ±1.5%
or ±6%
±4K or ±6%
±2K or ±3%
±1K or ±1.5%
≤±0.75(0.5~5MHz)
(at 6.0MHz)
5～8.5adjustable
0.04～15
(RMS measurement is not weighted)
See Appendix B (Supplement)
See Appendix B (Supplement)
See Appendix B (Supplement)
See Appendix B (Supplement)
12.5% ​​~87. 5%
12.5%~87.5%
PAL-D audio subcarrier frequency is
0. 04≤f(kHz)≤0. 13
0. 13≤f(kHz)≤10
10≤f(kHz)≤14
14≤f(kHz)≤15
0. 04≤/(kHz)≤0. 13
0. 13≤f(kH2)≤7. 5
See Appendix G (reference)
Technical parameters
Working frequency band
Number of pre-selected channels
Input level range
Noise coefficient
Second local oscillator frequency stability
GB/T 11442—1995
Electrical performance requirements for popular indoor units
IF filter 3dB bandwidth (B)
Image interference suppression ratio
Static threshold value
Gain stability
Continuous random clutter signal-to-noise ratio (S
Single interference signal-to-noise ratio
Power supply interference signal-to-noise ratio
Pulse interference signal-to-noise ratio
Color cross-interference modulation
Energy diffusion elimination ratio
K coefficient
Field time Waveform distortion (Kso)
Time waveform distortion (Kb)
2T wave amplitude distortion (K%)
2T wave distortion (K,)
Video frequency response
Brightness/chrominance gain inequality (AK)
Brightness/chrominance delay inequality (△r)
Requirements
970~1470
60～—30
±8 (±2T)
±4 (±4T)
±2 (±8 T)
5～40℃
See Appendix A (supplement)
See Appendix G (reference)
Audio color subcarrier beat product
Ratio to image signal
Image signal to residual diffusion signal
0.5~4.8MHz
Technical parameters
Differential gain distortion (DG)
Differential phase distortion (DP)
Sync pulse amplitude distortion
Video return loss
Audio sub-bearing cheek adjustable range
Audio band
Audio harmonic distortion
Audio signal-to-noise ratio (S/N)
Audio frequency response
4.4.3 Electromagnetic compatibility requirements
GB/T11442-1995
Continued Table 7
≥48 (RMS value is not weighted)
2 Local oscillator leakage level: ≤65dBm (within 500MHz bandwidth); the RF interference voltage injected into the power supply shall comply with the requirements of Article 1.3 of GB7236. b.
4.4.4 Safety
The safety requirements of the indoor unit shall comply with the relevant provisions of Class 1 equipment in GB8898. a.
Marking: should comply with the requirements of Chapter 5 of GB8898; Structure: should comply with the requirements of Chapter 9 of GB8898; Insulation and electrical strength: should comply with the requirements of Chapter 10 of GB8898; Temperature difference: should comply with the requirements of Chapter 11 of GB8898; Power cord: should comply with the requirements of Chapter 16 of GB8898. 4.4.5 Environmental adaptability
Environmental test requirements are shown in Table 5.
4.4.6 Reliability requirements
The lower limit of the mean time between failures (MTBF): 9, ≥5000h. 5 Test method
5.1 Visual inspection
12.5% ​​~~ 87.5%
12.5%~87.5%
The audio subcarrier frequency of PAL-D is
0.08≤f(kHz)≤0.13
0.13≤/(kHz)≤3.0
3.0≤f(kHz)≤7.5
See Appendix G (reference)
0.08≤f(kHz)≤0.13
0.13≤f(kHz)≤5
5.0≤f(kH2)≤7.5
7.5≤f(kHz)≤105
See Appendix G (reference)
Technical parameters
Working frequency band
Number of pre-selected channels
Input level range
Noise coefficient
Second local oscillator frequency stability
GB/T 11442—1995
Electrical performance requirements for popular indoor units
IF filter 3dB bandwidth (B)
Image interference suppression ratio
Static threshold value
Gain stability
Continuous random clutter signal-to-noise ratio (S
Single-side interference signal-to-noise ratio
Power supply interference signal-to-noise ratio
Pulse interference signal-to-noise ratioWww.bzxZ.net
Color cross-talk modulation
Energy diffusion elimination ratio
K coefficient
Field time waveform distortion (Kso)
Line time waveform distortion (Kb)
2T wave amplitude distortion (K%)||t t||2T wave distortion (K,)
Video frequency response
Brightness/chrominance gain inequality (AK)
Brightness/chrominance delay inequality (△r)
Requirements
970~1470
60～—30
±8 (±2T)
±4 (±4T)
±2 (±8T)
5～40℃
See Appendix A (supplement)
See Appendix G (reference)
Audio color subcarrier beat product
Ratio to image signal
Image signal to residual diffusion signal| |tt||0.5~4.8MHz
Technical parameters
Differential gain distortion (DG)
Differential phase distortion (DP)
Sync pulse amplitude distortion
Video return loss
Audio subcarrier adjustable range
Audio band
Audio harmonic distortion
Audio signal-to-noise ratio (S/N)
Audio frequency response
4.4.3 Electromagnetic compatibility requirements
GB/T11442-1995
Continued Table 7
≥48 (RMS value is not weighted)
Second local oscillator leakage level: ≤65 dBm (within 500MHz bandwidth); the RF interference voltage injected into the power supply shall comply with the requirements of Article 1.3 of GB7236. b.
4.4.4 Safety
The safety requirements of the indoor unit shall comply with the relevant provisions of Class 1 equipment in GB8898. a.
Marking: shall comply with the requirements of Chapter 5 of GB8898; Structure: shall comply with the requirements of Chapter 9 of GB8898; Insulation and dielectric strength: shall comply with the requirements of Chapter 10 of GB8898; Temperature difference: shall comply with the requirements of Chapter 11 of GB8898; Power cord: shall comply with the requirements of Chapter 16 of GB8898. 4.4.5 Environmental adaptability
See Table 5 for environmental test requirements.
4.4.6 Reliability requirements
The lower limit of the mean time between failures (MTBF): 9, ≥5000h. 5 Test method
5.1 Visual inspection
12.5% ​​~~ 87.5%
12.5%~87.5%
The audio subcarrier frequency of PAL-D is
0.08≤f(kHz)≤0.13
0.13≤/(kHz)≤3.0
3.0≤f(kHz)≤7.5
See Appendix G (reference)
0.08≤f(kHz)≤0.13
0.13≤f(kHz)≤5
5.0≤f(kH2)≤7.5
7.5≤f(kHz)≤105
See Appendix G (reference)
Technical parameters
Working frequency band
Number of pre-selected channels
Input level range
Noise coefficient
Second local oscillator frequency stability
GB/T 11442—1995
Electrical performance requirements for popular indoor units
IF filter 3dB bandwidth (B)
Image interference suppression ratio
Static threshold value
Gain stability
Continuous random clutter signal-to-noise ratio (S
Single-side interference signal-to-noise ratio
Power supply interference signal-to-noise ratio
Pulse interference signal-to-noise ratio
Color cross-talk modulation
Energy diffusion elimination ratio
K coefficient
Field time waveform distortion (Kso)
Line time waveform distortion (Kb)
2T wave amplitude distortion (K%)||t t||2T wave distortion (K,)
Video frequency response
Brightness/chrominance gain inequality (AK)
Brightness/chrominance delay inequality (△r)
Requirements
970~1470
60～—30
±8 (±2T)
±4 (±4T)
±2 (±8T)
5～40℃
See Appendix A (supplement)
See Appendix G (reference)
Audio color subcarrier beat product
Ratio to image signal
Image signal to residual diffusion signal| |tt||0.5~4.8MHz
Technical parameters
Differential gain distortion (DG)
Differential phase distortion (DP)
Sync pulse amplitude distortion
Video return loss
Audio subcarrier adjustable range
Audio band
Audio harmonic distortion
Audio signal-to-noise ratio (S/N)
Audio frequency response
4.4.3 Electromagnetic compatibility requirements
GB/T11442-1995
Continued Table 7
≥48 (RMS value is not weighted)
Second local oscillator leakage level: ≤65 dBm (within 500MHz bandwidth); the RF interference voltage injected into the power supply shall comply with the requirements of Article 1.3 of GB7236. b.
4.4.4 Safety
The safety requirements of the indoor unit shall comply with the relevant provisions of Class 1 equipment in GB8898. a.
Marking: shall comply with the requirements of Chapter 5 of GB8898; Structure: shall comply with the requirements of Chapter 9 of GB8898; Insulation and dielectric strength: shall comply with the requirements of Chapter 10 of GB8898; Temperature difference: shall comply with the requirements of Chapter 11 of GB8898; Power cord: shall comply with the requirements of Chapter 16 of GB8898. 4.4.5 Environmental adaptability
See Table 5 for environmental test requirements.
4.4.6 Reliability requirements
The lower limit of the mean time between failures (MTBF): 9, ≥5000h. 5 Test method
5.1 Visual inspection
12.5% ​​~~ 87.5%
12.5%~87.5%
The audio subcarrier frequency of PAL-D is
0.08≤f(kHz)≤0.13
0.13≤/(kHz)≤3.0
3.0≤f(kHz)≤7.5
See Appendix G (reference)
0.08≤f(kHz)≤0.13
0.13≤f(kHz)≤5
5.0≤f(kH2)≤7.5
7.5≤f(kHz)≤10
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