Standard
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AS 1417:2023
[Current]Receiving antennas for radio and television in the VHF and UHF broadcast bands — Design, manufacture and performance of outdoor terrestrial television antennas
AS 1417:2023 specifies requirements for the design and manufacture of outdoor antennas for the reception of digital terrestrial television transmitted in the high VHF and UHF bands and to provide the necessary performance specification and recommended values for manufacturers to make products suitable for the Australian environment.
Published: 26/05/2023
Pages: 45
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
2 Electrical specifications
2.1 General
2.2 Antenna suitability for given reception areas
2.3 Operating frequency range or bandwidth
2.3.1 General
2.3.2 Channel block plan
2.3.3 Use of channel blocks and exceptions
2.3.4 Rejection of out-of-band signals
2.4 Antenna gain
2.4.1 Gain specification
2.4.2 Beamwidth (3 dB)
2.4.3 Front-to-back ratio
2.4.4 Antenna patterns (Directivity)
2.4.5 Front-to-sidelobe ratio
2.5 Cross-polarization discrimination
2.6 Antenna interface characteristics
2.6.1 Anntenna output connector
2.6.2 Antenna baluns
2.6.3 Antenna impedance and return loss (RL)
2.6.4 Low pass filter characteristics
2.7 Antenna performance
3 Mechanical specifications
3.1 General
3.2 Antenna wind load pressures and forces
3.3 Static loads
3.4 Weight
3.5 Dimensions
3.6 Hardware and fittings
3.7 Terminal device robustness
3.8 Environmental requirements
3.8.1 Corrosion resistance
3.8.2 Other physical properties
3.8.3 Weatherproofing
4 Recommended specification sheet format
4.1 General
4.2 Electrical specifications
Appendix A
A.1 General
A.2 Comparison method — Measurements using off-air DTV transmissions
A.2.1 General
A.2.2 Test set-up
A.2.2.1 Equipment
A.2.2.2 Determination of test location
A.2.3 Gain comparison measurement
A.2.4 Front-to-back ratio measurement
A.3 Factors affecting measurement accuracy
A.3.1 General
A.3.2 Test set-up
A.3.3 Minimizing multipath reflections
A.3.4 Antenna separation distance
A.3.4.1 General
A.3.4.2 Near field and far field boundaries
A.3.4.3 Mutual coupling effects
A.4 Measurements using the substitution method
A.4.1 General
A.4.2 Equipment
A.4.2.1 Transmit antenna
A.4.2.2 Reference antenna
A.4.2.3 RF signal generator and level measurement equipment
A.4.3 Gain measurement
A.4.3.1 General
A.4.3.2 Test method
A.4.4 Front-to-back ratio measurement
A.4.5 Half-power beamwidth and directional pattern measurement
A.4.5.1 General
A.4.5.2 Test method
A.4.6 Horizontal radiation pattern measurement
A.4.7 Cross-polarization discrimination
A.4.7.1 General
A.4.7.2 Test method
A.5 Measurements using the reciprocity method
A.5.1 General
A.5.2 Test method
A.6 Antenna return loss measurement
Appendix B
Appendix C
Appendix D
D.1 General
D.2 The digital cliff effect
D.3 Receiver input overload
D.4 Digital error correction systems
D.5 Checking a DTV signal with a signal quality meter
D.5.1 General
D.5.2 Assessment of margin above digital cliff
D.6 Digital reception margin
D.7 Systems with amplifiers
D.8 Carrier-to-noise thresholds and signal levels
D.9 Calculation of the likely signal margin in prime and fringe areas
D.10 Determining antenna type
D.11 Antenna gain descriptions as shown in mySwitch cross-reference
Bibliography
Cited references in this standard
ITU-R Recommendation BT.419-3
Directivity and polarization discrimination of antennas in the reception of television broadcasting
[Current]
Environmental testing — Part 2-52: Tests — Test Kb: Salt mist, cyclic (sodium chloride solution)
[Current]
Methods of test for metallic and related coatings, Method 1.1: Local thickness tests — Micrographic examination of cross-sections
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