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eLibrary > BS EN IEC 60728-3:2018 - TC Tracked Changes. Cable networks for television signals, sound signals and interactive services - Active wideband equipment for cable networks (TA 5) >

BS EN IEC 60728-3:2018 - TC Tracked Changes. Cable networks for television signals, sound signals and interactive services - Active wideband equipment for cable networks (TA 5), 2020

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BS EN IEC 60728-3:2018 - TC Tracked Changes. Cable networks for television signals, sound signals and interactive services - Active wideband equipment for cable networks (TA 5), 2020

30348467_New.pdf [Go to Page]
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CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms [Go to Page]
3.1 Terms and definitions
3.2 Symbols
3.3 Abbreviated terms
4 Methods of measurement [Go to Page]
4.1 General
4.2 Linear distortion [Go to Page]
4.2.1 Return loss
4.2.2 Group delay variation
4.3 Non-linear distortion [Go to Page]
4.3.1 General
4.3.2 Types of measurements
4.3.3 Intermodulation
Figures [Go to Page]
Figure 1 – Basic arrangement of test equipment for evaluation of the ratio of signal to intermodulation product [Go to Page]
4.3.4 Composite triple beat
Figure 2 – Connection of test equipment for the measurement of non-linear distortion by composite beat [Go to Page]
4.3.5 Composite second order beat
4.3.6 Method of measurement of non-linearity for pure digital channel load
Figure 3 – BER measurement test configuration
Tables [Go to Page]
Table 1 – Measurement parameters for full channel load
Figure 4 – CINR measurement test setup
Figure 5 – Plot of CINR in dB curve (forward path) versus EUT channel output signal level in dB(V [Go to Page]
4.3.7 Hum modulation of carrier
Figure 6 – Carrier/hum ratio
Figure 7 – Test set-up for local-powered objects
Figure 8 – Test set-up for remote-powered objects
Figure 9 – Oscilloscope display
4.4 Noise figure [Go to Page]
4.4.1 General
4.4.2 Equipment required
4.4.3 Connection of equipment
Figure 10 – Measurement of noise figure [Go to Page]
4.4.4 Measurement procedure
4.5 Crosstalk attenuation [Go to Page]
4.5.1 Crosstalk attenuation for loop-through ports
4.5.2 Crosstalk attenuation for output ports
4.6 Measurement of noise power ratio (NPR) [Go to Page]
4.6.1 General
Figure 11 – Measurement of crosstalk attenuation for loop through ports of multi-switches [Go to Page]
4.6.2 Equipment required
4.6.3 Connection of equipment
Figure 12 – Characteristic of the noise filter
Figure 13 – Test setup for the non-linearity measurement
Table 2 – Notch filter frequencies [Go to Page]
4.6.4 Measurement procedure
4.6.5 Presentation of the results
4.7 Immunity to surge voltages [Go to Page]
4.7.1 General
4.7.2 Equipment required
4.7.3 Connection of equipment
Figure 14 – Presentation of the result of NPR [Go to Page]
4.7.4 Measurement procedure
5 Equipment requirements [Go to Page]
5.1 General requirements
5.2 Safety
5.3 Electromagnetic compatibility (EMC)
5.4 Frequency range
5.5 Impedance and return loss
Figure 15 – Measurement set-up for surge immunity test
5.6 Gain [Go to Page]
5.6.1 Minimum and maximum gain
5.6.2 Gain control
5.6.3 Slope and slope control
5.7 Flatness
5.8 Test points
5.9 Noise figure
Table 3 – Example of return loss requirements
5.10 Non-linear distortion [Go to Page]
5.10.1 General
5.10.2 Second-order distortion
5.10.3 Third order distortion
5.10.4 Composite triple beat
5.10.5 Composite second order
5.10.6 Maximum operating level for pure digital channel load
5.11 Hum modulation
5.12 Power supply
5.13 Environmental [Go to Page]
5.13.1 General
5.13.2 Transportation
5.13.3 Installation or maintenance
5.13.4 Operation
5.13.5 Energy efficiency of equipment
5.14 Marking [Go to Page]
5.14.1 Marking of equipment
5.14.2 Marking of ports
5.15 Requirements for multi-switches [Go to Page]
5.15.1 Control signals for multi-switches
5.15.2 Amplitude frequency response flatness
5.15.3 Return loss
5.15.4 Through loss
5.15.5 Isolation
5.15.6 Crosstalk attenuation
5.15.7 Satellite IF to terrestrial signal isolation
5.16 Immunity to surge voltages [Go to Page]
5.16.1 Degrees of testing levels
5.16.2 Recommendation of testing level degree
Table 4 – Parameters of surge voltages for different degrees of testing levels
Table 5 – Recommendations for degree of testing levels
Annexes [Go to Page]
Annex A (normative) Test carriers, levels and intermodulation products [Go to Page]
A.1 Two signal tests for second- and third-order products [Go to Page]
A.1.1 Intermodulation products with test signals at frequencies ƒa and ƒb, see Table A.1
A.1.2 Signal levels
Figure A.1 – An example showing products formed when 2ƒa > ƒb
Table A.1 – Intermodulation products with two signals [Go to Page]
A.2 Three signal tests for third order products – Intermodulation products with test signals at frequencies ƒa, ƒb and ƒc , see Table A.2 and Figure A.3
Figure A.2 – An example showing products formed when 2ƒa < ƒb
Figure A.3 – Products of the form ƒa ± ƒb ± ƒc
Table A.2 – Intermodulation products with three signals
Annex B (informative) Test frequency plan for composite triple beat (CTB), composite second order (CSO)
Table B.1 – Frequency allocation plan
Annex C (informative) Measurement errors that occur due to mismatched equipment
Figure C.1 – Error concerning return loss measurement
Figure C.2 – Maximum ripple
Annex D (informative) Examples of measurement channels [Go to Page]
D.1 Operating frequency range 110 MHz to 1 006 MHz
D.2 Operating frequency range 110 MHz to 862 MHz
D.3 Operating frequency range 258 MHz to 1 218 MHz
Bibliography [Go to Page]

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BS EN IEC 60728-3:2018 - TC Tracked Changes. Cable networks for television signals, sound signals and interactive services - Active wideband equipment for cable networks (TA 5), 2020

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