Transcript
AlanDick Broadcast Ltd. / Jampro Antennas Inc. 2016 Analogue to Digital Transition Digital Broadcasting: Issues & Challenges
Agenda AlanDick Broadcast / Jampro – Brief Introduction
Review of companies capabilities
Digital Considerations Reception, who / where is your audience? Coverage and Planning Issues for Digital
Standards Service Reliability
Timescales / Existing services
Products for Digital Antennas Filters / Combiners Services
ADBL / Jampro – experience and Site References with Digital deployments
Company Introduction AlanDick: Oldest Antenna / Combiner / Tower company in UK, Since 1967 Sister company of
Jampro: Oldest Broadcast Antenna / Combiner company in North America, Since 1954
Over 25,000 broadcasters worldwide benefit from the quality and performance of the companies Systems
Company Capabilities ADBL / Jampro can supply everything from product, services and turnkey solutions. Nearly all products are designed and fully manufactured in house.
Antennas Combiners / Filters Coaxial / Rigid Line Towers Installation System Solutions
Building
Sat RX
Foundations
Patch Panel Switch
CU
CU
Module
Module
PIE
RF TX ChA
RF TX ChB
A V R
Regions – Technical & Sales ALL Alex Perchevitch
[email protected] Canada / East USA R. Wayne Young
[email protected]
Office Key :- Technical & Sales
UK/EMEA (ADBL)
- Sales
Chris Randall
[email protected]
Eastern / Central USA Wilbur Bran
[email protected] Jeffrey Clarine
[email protected]
Asia Pacific Ben Crease
[email protected] ben.crease@ alandickbroadcast.com
Sacramento / West USA Greg Montano
[email protected] Sonia Del Castillo
[email protected] Mexico / Latin America Alfredo Avalos
[email protected] USA/Latin America Jim Godfrey
[email protected]
Middle East (ADME)
India
Warren Steele Ravi Dahiya
[email protected] [email protected]
Key Digital Milestones 1993 - Introduced First DTV Antenna Solutions 1994 - Design a dual aperture FM and DAB antenna especially for the BBC customer. 1995 - First of many installations for DVB-T in the UK for what is now Arqiva, including
Crystal Palace and Croydon the main London Tx sites. Supplied to majority of Arqiva sites. 1999 - DAB antenna in Singapore and Brunei 2001 - DVB-T UHF Combiner in Singapore 2002 - Digital TV supply to Nam San, Seoul 2004 - Multiple UHF digital ready systems for TV7 Indonesia 2005 - First DTV station on air in Latin America for TV Azteca. Now >120 Digital Chs on air 2006 - Tallest broadcast structure - highest power TV system in Asia. Indosiar 400m tower and 320 kw UHF TV system, 3 analogue and 2 DVB-T 2008 – Tower, Antenna & Combiner for DVB-T in Brunei 2012 – Multiple DVB-T Antennas / Combiner mask filters for VTV, Vietnam 2012 – Digital systems Antennas and install, ABS/CBN Philippines 2012 – DVB System, Brunei 2013 – DVB-T2 – Antenna & Combiner System, Singapore. 2014 - Ch. 3 CPOL Antenna, New York City Times Square, 1st new TV station in 20+ years. 2014/15/16 - DVB-T2 – Repeater / Gap Filler Antennas (Roof Top), Singapore 2015 - Televisa Nationwide expansion of Digital TV Network 2015 - TV Azteca 48 broadband UHF Super Turnstiles and 5 kw mask filters 2016 - Epol upgrade to main ABC5 antenna covering Manila – in progress
Considerations for Digital Digital application Where
is your Audience
Coverage Planning, for that audience Standard,
Modulation Parameters. Service Reliability for Mobile/Indoor Reception Performance Target
Implementation considerations Timescales / Existing services
Digital Application Fixed Reception (traditional Analogue) Only
to serve house holds roof top antenna
Portable, Outdoor Hand
held devices (mobile reception)
Portable, Indoor Both
Home and hand held devices (mobile)
Difference applications means different minimum recommended RF levels
Digital standards & where DVB-T/T2: Erope, Middle East, Africa & Asia
(except Korea, China, Japan & Philippines) a few Latin American countries ATSC->3.0: (USA, Canada, Mexico & South Korea) DTMB: GB20600-2006 (GB stands for guo biao, “national standard” in Chinese) ISDB-T: Japan, Philippines SBTVD-T (aka ISDB-TB): most Latin American countries All OFDM signal modulation
DVB-T Planning Field Strength Requirements
DVB-T Planning Field Strength Requirements ~20dB+ because 0 gain RX & reduction of height
~10dB++ because building loss
Modulation Parameters Payload capacity / data bandwidth
Constellation Guard Interval
Size of Coverage Area (SFN)
Error correction
FTT / No carriers
Robustness of decoding signal
Doppler performance (max handset speed)
The Success of Mobile Reception
Service Reliability is Key
Reliability of Service - Polarization
Experiment Results – Heavy Scatter, Depolarized Environment Circular Good Must
have orthogonal waves
Elliptical better Overall
range and reliability
Performance Target, Realistic Guaranteed results? Consultants Extensive
Plan Criteria Set
Limited budget Copy
Analogue, but digital
Somewhere in between?
Implementation considerations Existing Transmission Structure Does
it have structural capacity? Does it have space, and suitable space?
Existing Broadcast system Does
it have additional power rating? Does it have bandwidth? Is it digital ready? Is it possible to combine?
Planning - Digital transition timescales Timescales from 1st digital transmission to
analogue switch off (digital switch on) is typically 10-15 years.
Analogue & Digital both required during this time!
Dual cast Separate
or Combined systems? When will you need to cover indoor/mobile?
Digital to Analogue transition - Stages Analogue (Pre-Digital), All Revenue from this! No Plans for Digital Planning for Digital Initial Digital Basic Digital “Introduction”, just on air Main Coverage Analogue, remains critical importance Medium Term
Assess market feedback and adoption rate. Improve or adapt digital signal, change of parameters or even standard Analogue still critical, some disruption allowed/acceptable
End Game (for Analogue) Change digital to be prime signal, best transmission locations Analogue still required until switch off day
After End Game Digital Restacking / Repacking / Refarming Further potential changes due to loss of total Broadcast bandwidth This could happen more than once! Even a possible band change.
Products for Digital Antennas Panels
HPOL/VPOL/EPOL/CPOL
Slots Broadband
Slots Super Turnstyle Dipole arrays - VPOL
Combiners and Switching Mask
Filtering – Reflective and Constant Impedance Combining Patch Panels –Rigid transmission line & components Integrated solutions
Antenna options for adding Digital Single channel – limited bandwidth Simpler
/ quicker initial option
Broadband – Multiplexing Channels More
Complex
Gap Filling
UHF Panel Antenna Broadband Low VSWR over many channels UHF 470-890 MHz Modular Design Omni or custom azimuth patterns Fiberglas Radome Protection
JUHD UHF panel systems Top Mount high power, high Gain Broadband array
Indosiar 320kw 400m
Omni Directional
RCTI 240kw 300m
32 Lambda
TPI Global 280kw 300m
UHF Panel antennas - Advantages Broadband 470 – 860 MHz Various power levels from low to high. Azimuth Patterns (HRP) – standard and
custom Elevation Patterns (VRP) – Beam tilt and null levels can vary Corporate or parallel fed Many Panels – not a single source of failure
UHF Panel antennas - Disadvantages High weight and wind loading Corporate feed – many cables, splitters, dividers Complex installations Mixed polarisation increase Complexity further Many Panels / components Mounting Advance planning engineering
JUHD Standard Azimuth Patterns
Omni
Wide Cardioid
Peanut
Narrow Cardioid
Single Lobe
Wrap Around Solutions Craigkelly – Scotland Main digital antenna (Band 4& 5): Comprises 8-Tier of 4 UHF panels which provides omni directional pattern. Broadcasting 6 channels with 2.32kW transmitter power Reserve DSO Antenna (Band 4 & 5): Comprises 6-Tier wrap around cogged antenna of 18 UHF panels around. Broadcasting 6 channels with 3.28kW transmitter power.
Custom Solution Wenvoe- Wales 5-Around; 12-TIER omni pattern 7 Channels 4.5kW transmitter power
Jampro Pro Star Slot Antennas Input power 1-70kW+ per input Horizontal, Circular or Elliptical Tested in full scale Multi channel designs Side or top mounted Electrical beam tilt & null fill Easy installation VSWR 1.1:1 over channels Slots produced over 30 years
Several Models, All Pressurized: JA-SS low cost, small size, low wind load,
sidemount on existing tower JA/LS 2 kW excellent weather resistance JA/MS to 30 kW analog, 10 kw AVRG DVB-T ideal for combining DVB-T services to exiting tower JSL 20 kW premium model low power slot JSM 30 kW premium slot for medium power JSH 70+ kW high power premium performer JTW 120 kw+ Super High power slot
The JA/MS-BB Broadband Slot Power handling up to 15kW+ AVG Broadband for multiple channels typically 50-60 MHz, 120Mhz + available 8, 12, 16 or more bays Standard patterns Side or Top Mount Stable elevation (VRP) performance
VSWR plot Of a JA/MS-BB Broadband slot antenna
UHF Slot antennas - Advantages Weight and wind loading 50 to 75% less than a panel system This
means savings on complete tower system.
Broadband, standard 50-60 MHz up to 120 MHz+ Various power levels from low to high. Azimuth Patterns (HRP) – standard and custom Elevation Patterns (VRP) – Beam tilt and null levels
can vary Simple to implement elliptical / circular polarization Mechanically simplistic Easy to Install
UHF Slot antennas - Disadvantages Bandwidth limited Tower effects – for side mounts Ability to change add other channels at future date.
Antenna Comparison Panel vrs Slot Same weight and windload different gain
Small Aperture Low Gain Less Distance
Large Aperture High Gain More Distance
Antenna Comparison Panel vrs Slot Same gain different weight and windload
Same Vertical Aperture Worse Weight Worse Tower Stress
Same Vertical Aperture Much better Weight Much better (lower) Tower stress
Antenna Comparison Panel vrs Slot Same circular/elliptical polarization, different power distribution
Same Vertical Aperture Worse distribution (X2) More points of failure (X++)
Same Vertical Aperture Better distribution Less points of failure
Standard Azimuth Patterns
Omni
Cardioid
Peanut
Medium Cardioid
Narrow Lobe
JAT-U UHF SuperTurnstyle Input power 10kw digital Gain 5 - 11 dB Full band UHF Omni directional pattern Simple Installation
Gap Filler Solutions Antennas
Panel SuperTurnstyle Slots Hemisphere
Combiners
Filters Hybrids Constant Impedance
Rigid Line Components
UHF Antenna
Range of Power Levels
From 50w to 320kw
Different Styles
Panel, SuperTurnstyle, Slot
Range of Gains & Patterns Multiple Chs
UHF Panel Antenna Broadband Low VSWR over many channels UHF 470-890 MHz Modular Design Omni or custom azimuth patterns Fiberglas Radome Protection
Panel JUHD
Horizontally Polarised
JUVD
Vertically Polarised
JUCD
Circularly Polarised
Panel Typical mounting arrangement
Around Tower
Example: JUHD-1/4(4)
UHF SuperTurnstyle Antenna Input power to 10kw digital Gain 5 - 11 dB Full band UHF Omni directional pattern Simple Installation
Superturnstyle JAT-U
Horizontally Polarised
JVD-U
Vertically Polarised
UHF Slot Antennas Input power 1-70kW+ per input Horizontal, Circular or Elliptical Tested in full scale Multi channel designs Side or top mounted Electrical beam tilt & null fill Easy installation VSWR 1.1:1 over channels Slots produced over 30 years
Broadband Slot - JA/MS-BB Power handling up to 10 kW AVRG Broadband for multiple channels typically 50-60 MHz, 120Mhz + available 8, 12 or 16 bays Standard patterns Side or Top Mount Stable elevation (VRP) performance
Super Slot Antenna - JA-SS Input 1 kW to 3 kW UHF band - 470 to 890 MHz Wide bandwidth option available (1 to 3 channels) Low Cost-Outstanding Performance 4, 8, 12 or 16 Bays Five Azimuth Patterns Ideal for lower power analog and DTV , DVB-T applications. Low VSWR Side mounted system standard. Side mount brackets included.
Slot Antenna - JL-SS Input up to 1 kW Single UHF Channel Ideal for Boosters and Gap Fillers Low Cost-Outstanding Performance 4 Bays Omni Azimuth Pattern Low VSWR Low weight - wind loading
Slot Antenna Typical mounting arrangements Side Mounted Top Mounted
In-Bed Flange
UHF Hemisphere Input up to 50W All UHF Channels & more
470 – 2500MHz
Ideal for Indoor transmission, Pico repeaters or small gaps. Omni Azimuth Pattern Low VSWR Low weight Simple Installation
Combiners & Switching Mask filters Starpoint Constant Impedance Integrated Solution
TYPICAL SPECIFICATIONS
RCEC Mask filter – Reflective -6 section Cross coupled -Steep rejection -High Q cavities -Low insertion loss -Critical mask
TOP VIEW
FRONT VIEW
3-CHANNEL UHF STARPOINT COMBINER - Star Point combining -Cost effective -Non critical Mask
2-CHANNEL UHF MED. POWER BALANCED COMBINER -Constant impedance -Compact size -Limited power handling -Good isolation -Coaxial components -Critical Mask
HIGH POWER DIGITAL, UHF BAND, CRITICAL MASK, ADJACENT CH, LOW LOSS 6 Channel Dual Chain High Power Channel Combiners Each channel 6kw Digital power 10 channels future capacity
HIGH POWER DIGITAL, FULL UHF BAND RETUNEABLE COMBINER MODULE
MEDIUM/HIGH POWER DIGITAL, UHF BAND, MASK FILTERING, ADJACENT CHANNEL 2 Channel Adjacent Combiners with Mask for each Each channel 2kw Digital power Small footprint, cabinet sized 4 Ch future capacity
LOW to MEDIUM POWER DIGITAL, UHF BAND RACK MOUNTED COMBINER MODULE
UHF Combiners Range of Power Levels
From 50w to 240kw
Different Styles
Constant Impedance Starpoint Manifold
Types of Transmission
Coaxial Waveguide
Multiple Chs
Filter – RCEC, DVB-T2 Mask 6/8 section Cross coupled Steep rejection High Q cavities Low insertion loss Critical mask
Hybrid - RCHC Range of Power levels Compact size Low insertion loss
Combiner – Rack Mounted Fits 19” Rack Module design Compact size
Rigid Line Components Patch Panels / Switch Frames
Quick release
Rigid Line
Range of sizes Elbows, Flanges
Cable Connectors
UHF POWER SPLITTER / PATCH PANEL
Integrated Solutions
Integrated Solutions
UHF Transmitter and Combiner Integrated
Selected experience. ISDB-T in Latin America Digital in Asia Brunei Vietnam South
Korea
Digital in USA Significant Project Example - Singapore
Chile & Honduras UHF Slot Antenna for ISDB-Tb Elliptically Polarized (75H:25V) Broadband Operation (100+MHz BW)
Brunei RTB 160m Tower Full RF Systems 2
Sites
DVB-T
HTV Centre of HCMC 250m Tower RF Systems
South Korea Nam San, Seoul
UHF
System
Digital
VTV 13 sites 8
new antennas
DVB-T2 RF System
PMCM, Ch.3, New York, USA 6 BAY LAMBDA – CH 3 TOP MOUNTED CIRCULARLY POLARIZED 6 BAY LAMBDA ANTENNA AND SUPPORT STRUCTURE RF ENGINEERING DONE BY ADBL, UK MANUFACTURING AND COMPLETE ASSEMBLY / TESTED IN FULL SCALE ANTENNA DESIGNED TO PERMIT TRANSPORTING TO SITE AND 4TIMES SQUARE BUILDING ROOF TOP IN PIECES NOT TO EXCEED 3.8M / 12.5FT. TOTAL ANTENNA AND SUPPORT POLE WEIGHT IN EXCESS 19,000 LBS / 8600 KGS
Singapore Significant Project Example Digital TV Network Singapore Goal
to have in-building coverage Customer Mediacorp Main Transmission Site Multiple Rooftop Repeater Sites
Singapore – Main Site Customer, Major Singapore Broadcaster Main site Covering all of Singapore Complete RF System Antenna Combiner Transmission Patch
Panel Monitoring
Line
Main Site - Antenna 48 UHF panel array Horizontally Polarized 100kw Power rating DVB-T2 Broadband over all of UHF Band Installed on a 224m tower Dual Transmission line
Main Site - Combiner 6 Channel Combiner Dual chain (2 x 6) 6kw per Channel DVB-T2 Adjacent Channel Critical Mask Low Loss Up to 10 Channels
Main Site - Patch Panel & Rigid Line High Power Switching Dual Feed Antenna Broadband UHF Monitoring DVB-T2
Singapore – Repeater Sites Customer, Major Singapore Broadcaster Repeater Sites Covering multiple locations in Singapore Custom Antenna Patterns for each site Rooftop installations In Building Penetration
Singapore – Repeater Site Locations all over Singapore Initially phase 1 for 10 sites, more required.
Found more gaps fillers required now at phase 7, total of over 100 sites & still more required
Singapore – Repeater Sites Directional Antennas Typ. Side mounted to building Different patterns as required Main site provide program feed over DVB-T2 transmission Vertically Polarized
Singapore – Repeater Sites Installation Scaffold Paint
Thank you very much – any questions? AlanDick Broadcast Ltd. Ben Crease,
[email protected]