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BS EN 60728-5:2008 Cable networks for television signals, sound signals and interactive services - Headend equipment, 2008
- iec60728-5.pdf [Go to Page]
- CONTENTS
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviations [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols
- 3.3 Abbreviations
- 4 Methods of measurement [Go to Page]
- 4.1 Methods of measurement for digitally modulated signals
- 4.2 Single-channel intermodulation specification for channel amplifier and frequency converter
- 4.3 Three-carrier intermodulation measurement
- 4.4 Two carrier intermodulation measurements for second- and third-order products
- 4.5 Carrier-to-spurious signal ratio at the output
- 4.6 Signal-to-noise measurement
- 4.7 Differential gain and phase for PAL/SECAM signals
- 4.8 Group delay measurements
- 4.9 Phase noise of an RF carrier
- 4.10 Hum modulation of carrier
- 4.11 2T-pulse response, K-factor
- 4.12 Chrominance-luminance delay inequalities (20T-pulse method)
- 4.13 Luminance non-linearity
- 4.14 Intermodulation distortion (FM stereo radio)
- 4.15 Decoding margin (Teletext)
- 5 Performance requirements and recommendations [Go to Page]
- 5.1 Safety
- 5.2 Electromagnetic compatibility
- 5.3 Environmental
- 5.4 Marking
- 6 Equipment characteristics required to be met [Go to Page]
- 6.1 General
- 6.2 Power supply voltage
- 6.3 RF signal requirements
- 6.4 Composite video signal requirements
- 6.5 Audio signal requirements
- 6.6 Requirements for decoding margin (teletext)
- 6.7 IF signal requirements (AM-TV)
- 6.8 Antennas for terrestrial reception
- 6.9 Antenna amplifier
- 7 Equipment characteristics required to be published [Go to Page]
- 7.1 General
- 7.2 Environmental conditions
- 7.3 Maximum permissible output level
- 7.4 Operating range for output level
- 7.5 TV standard
- 7.6 Clamp
- 7.7 Noise figure
- 7.8 Data control signals, description of interface
- 7.9 Output level stability for TV modulators, TV converters and pilot generators
- 7.10 Pilot signal
- 7.11 Differential gain and phase
- 7.12 Group delay variation for analogue TV signals
- 7.13 Luminance non-linearity
- 7.14 2T-pulse
- 7.15 20T-pulse
- 7.16 Hum modulation
- 7.17 Television carrier-to-noise ratio
- 7.18 Audio in TV
- 7.19 Processing units for FM radio
- 7.20 Antennas for terrestrial reception
- 7.21 Control signals for outdoor units
- Annex A (normative) Definition of the specified test frequency range for return loss and noise figure
- Annex B (informative) Audio connector for European system
- Annex D (informative) Differences in some countries
- Annex E (normative) Correction factors for noise
- Annex F (informative) Digital signal level and bandwidth
- Annex H (informative) Measurement errors which occur due to mismatched equipment
- Annex I (normative) Correction factor for spectrum analyser
- Bibliography
- Figures [Go to Page]
- Figure 1 – Example of headend
- Figure 2 – Frequencies and levels of test carriers
- Figure 3 – Test carrier and interfering products in the pass band
- Figure 4 – Example showing products formed when 2 fa > fb
- Figure 5 – Carrier-to-spurious signal ratio in the output
- Figure 6 – Carrier-to spurious signal ratio at the output
- Figure 7 – Shoulder attenuation
- Figure 8 – Arrangement of test equipment for carrier-to-noise ratio measurement
- Figure 9 – Arrangement of test equipment for measurement of differential gain and phase
- Figure 10 – Signal D2 waveform
- Figure 11 – Example of modified staircase
- Figure 12 – Measuring set-up for determining the group delay variation
- Figure 13 –RF signal (time domain) amplitude-modulated with a split-frequency signal
- Figure 14 – Spectral presentation of the group delay measurement
- Figure 15 – Description of the measuring set-up
- Figure 16 – Choices of measuring aperture (value of the split frequency) for various measurement tests
- Figure 17 – Test set-up for phase noise measurement
- Figure 18 – Mask for phase noise measurements
- Figure 19 – Carrier/hum ratio
- Figure 20 – Test set-up for equipment with built-in power supply
- Figure 21 – Test set-up for equipment with external power supply
- Figure 22 – Oscilloscope display
- Figure 23 – K-factor mask for Quality Grade 2
- Figure 24 – Generation of 20T-pulse
- Figure 25 – Example of amplitude and delay error using 20T-pulse
- Figure 26 – Staircase signal for measurement of luminance non-linearity before and after differentiation
- Figure 27 – Example of a possible frequency combination displayed on a spectrum analyser
- Figure 28 – Arrangement of test equipment for intermodulation distortion
- Figure 29 – Principal measuring set-up for determination of decoding margin
- Figure 30 – Example of diagram of NF, C/N or S/N for equipment with AGC
- Figure A.1 – Test frequency range for TV channel processors
- Figure A.2 – Test frequency range for sub-band, full-band, multi-band amplifier
- Figure A.3 – Test frequency range for FM radio channel processor
- Figure B.1 – Mechanical dimensions
- Figure C.1 – Selectivity diagram
- Figure C.2 – Selectivity diagram
- Figure C.3 – Selectivity diagram
- Figure C.4 – Group delay mask
- Figure C.5 – Group delay pre-correction diagram
- Figure C.6 – Selectivity diagram
- Figure C.7 – Group delay mask
- Figure C.8 – Selectivity diagram
- Figure E.1 – Noise correction factor CF (dB) versus measured level difference D (dB)
- Figure G.1 – Frequency tolerance of converted signals in the IF range
- Figure H.1 – Error concerning return loss measurement
- Figure H.2 – Maximum ripple
- Tables [Go to Page]
- Table 1 – Test signal levels in decibels relative to reference level
- Table 2 – Test signal levels in decibels relative to reference level
- Table 3 – Test signal levels in decibels relative to reference level
- Table 4 – Noise bandwidth
- Table 5 – Frequency distances for phase noise measurement
- Table 6 – Publications for environmental requirements of headend equipment
- Table 7 – Return loss (input, output) of equipment
- Table 8 – Return loss (output) of headend
- Table 9 – Typical levels of digital signals with respect to analogue signals (back off)
- Table 10 – Carrier-to-spurious-signals ratio of digital modulated channel with respect to the peak level of an analogue TV carrier
- Table 11 – Frequency stability for AM TV related to the nominal AM TV frequency
- Table 12 – Long-term frequency stability for digital modulated signals
- Table 13 – Shoulder attenuation for digital modulated signals
- Table 14 – Phase noise of a DVB signal (PSK and QAM)
- Table 15 – Phase noise of a DVB signal (OFDM)
- Table 16 – In-channel group delay variation for digital modulated signals
- Table 17 – In-channel peak-to-peak amplitude response variation of DVB signals
- Table 18 – Stability of sound intercarrier
- Table 19 – Stability of residual carrier amplitude
- Table 20 – Frequency stability – SAT IF/IF converter
- Table 21 – Minimum requirements for MER for different QAM modulation schemes
- Table 22 – C/N values for converters at the headend output
- Table 23 – Return loss
- Table 24 – Signal voltage
- Table 25 – Signal level
- Table 26 – Requirements for decoding margin (Teletext)
- Table 27 – Return loss – IF signal
- Table 28 – Return loss – Antennas for terrestrial reception
- Table 29 – Recommended temperature ranges
- Table 30 – Carrier-to-third-order intermodulation ratio for maximum output level of channel amplifiers/frequency converters
- Table 31 – Carrier-to-third-order intermodulation ratio for maximum output level of sub-band, full band, multi-band amplifiers and multi-channel frequency converters for AM TV (not for channel amplifier)
- Table 32 – Carrier-to-second-order intermodulation ratio for maximum output level of sub-band, full band, multi-band amplifiers and frequency converters for AM TV or FM radio (not for channel amplifier)
- Table 33 – Carrier-to-intermodulation ratio for maximum output level of FM-TV channel amplifiers/frequency converters
- Table 34 – Carrier-to-third-order intermodulation ratio for maximum output level of FM TV full band, sub-band amplifiers
- Table 35 – Output level stability for TV modulators and TV converters
- Table 36 – Recommendation for differential gain
- Table 37 – Recommendation for differential phase
- Table 38 – Recommendation for group delay variation
- Table 39 – Recommendation for luminance non-linearity
- Table 40 – K-factor masks for 2T-pulse responses
- Table 41 – Recommendations for sidelobe suppression
- Table 42 – Recommendation for return loss of antennas
- Table B.1 – Mechanical dimensions
- Table B.2 – Pin and signal allocation
- Table B.3 – Application
- Table C.1 – Selectivity table
- Table C.2 – Group delay pre-correction table
- Table E.1 – Noise correction factor
- Table F.1 – Examples of bandwidths for digital modulation techniques [Go to Page]