Etl andrew bond_sspi_maio_2015

ROUTE AMPLIFY SPLIT SWITCH
ETL Systems
Andrew Bond
RF Signal Redundancy – Satellite Teleports
SSPI Brazil – May 2015

Heritage – ETL
RF Design & Custom Build
• Specialist RF Equipment Supplier for 26 years
• 98 Staff in 3 Global Offices
• Cover R&D, Production & Test

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Customers in over 100 countries

The RF Chain
LNB Redundancy
Switches
Power Supplies
LNB & DC PSUs
Fibre Optic
Links
Amplifiers
Fixed, variable, AGC
Splitters
Active & passive
Switch Matrix / Router
IF to SHF
Switches
Carrier monitoring & redundancy
Hybrid modular chassis system
Redundancy switch, amplifiers,
combiners & splitters
Hybrid Splitter / Combiner
Active & passive
Fibre Optic
Links
Amplifiers
n+1, redundant &
variable gain
Combiners
Active & passive
Switch Matrix / Router
IF to SHF
Modem Redundancy
Switches
IRD / Modem
Encoder / Modem
DOWNLINK
UPLINK
Components

The challenge:
• More and more space crafts orbiting the earth
• Bigger and more teleports with many different sizes and
designs of antennas

How RF engineers protect their jobs?

RF Signal Handling
• GEO orbiting satellites will exceed 420
• Hundreds of LEO and MEO satellites provide interlinks
between spacecraft. All eventually beamed down to earth
• Increasing traffic density, as well as capacity means
broader IF bands (E.G HTS Satellites)
• Bigger earth stations and wider range of antennas at each
of these teleports
• Antennas designed to handle multiple RF links of different
frequencies; Ka, Ku and C-bands

What RF Switch
matrices do
BROADCAST

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Case Studies & applications
Excelling in RF Engineering

CPU,
& control board
With RF level
detection and
reporting
Input-
A
Input-
B
Output
RJ45 Ethernet
9 way D: Comms.
9 way D: Alarms.
LED Indicators
PSU Status
Dual Redundant
Universal PSU
Auto / Manual /
Remote control
mode selection
2:1 REDUNDANCY SWITCH WITH INPUT LEVEL MONITORING AND REPORTING FUNCTION
Redundant L-band Downlink Project - Italy

Case Study - Redundant L-band Uplink Project - Sweden

Marine TVRO
• Typically 2 or 4 antennas
• Typically 4 L-band feeds per antenna (Ku or Ka
band)
• 16 to 128 receivers (some digiboxes STB’s; and
some IRD receivers)
• A pair of tracking antennas (e.g. Seatel) with
programmed blockage zones for
superstructure
• Fibre or direct Coax install with LNB powering
• Poor isolation and high losses lead to lost
signal, especially for Ka band
Case Study

1. RF Level Detection redundancy switching for 1 Satellite position with LNB control
4 off 2x1 Redundancy Switches
in a modular system chassis
ETL Model 26128-SW103-B7B7
4x64 L-band Optimus Matrix
ETL Model 21150-B7B7
DC 13/18V
+/- 22 kHz
DC 13/18V
+/- 22 kHz
DC 13/18V
+/- 22 kHz
Switching based on RF
detection – provides
DC (0V/13/18V +/- 22
kHz
Upto 64 feeds to set top boxes
selecting inputs via 13/18V +/- 22 KHz
Upto 64 feeds to receivers with
remote routing control

Case Study -Enigma RF Matrix for F1
• 32x32 matrix (expandable)
• Fan-out, fan-in, and FIFO options
• high resilience applications; custom
requirements & asymmetric systems (n>>m)
• NEW: NGM-40: 1200-3000 MHz and vari gain;
NGM-34: excellent RF specs to 2450 MHz for
Ka-band; NGM-35 low noise variant
Benefits & basics:
•IF, wideband ,L-band & XL-band options
•1 RF card for each RF input & output adding resilience
•Hot swap of all active components
•Dual redundant CPU’s & PSU’S
•On board monitoring & diagnostics

Formula 1 - Case Study

Formula 1 Case Study

RF L-band matrix with dual input receivers
A1M A1B
A2M A2B
A3M A3B
CAM 1 RX
CAM 3 RX
CAM 2 RX
CAM 1
CAM 2
Matrix Size Calculation
• No of Camera’s = No of Diversity Receivers
• 1 Receiver per camera
• 2 matrix outputs per camera
• 2 Matrix inputs per antenna
• For 18 antenna sites = 36 antenna’s = 36 matrix inputs
• For 20 camera’s there are 40 receiver inputs = 40
matrix outputs

Signal Redundancy – RF over Fibre

Redundant Fibre installation
ETL solution & roles:
• ETL’s Scorpion passive 2 way splitters are at the front end of each
system. 1U chassis holding 4 x 2-ways.
• Stingray 1U chassis – each populated with 4 x RX OR TX modules.
Total 6 chassis to give redundancy.
• 26128 modular system chassis with 2x1 redundancy switches with
auto-switchover (total 3 chassis with 4 cards in each).
The brief: Etisalat needed 12x 1+1 redundant fibre links for downlink and
uplink for some new antennas in Jebel Ali. Requirements included ability to
disable (fix) AGC on the uplink & redundant fibre chassis for added resilience.

Signal Redundancy - Amplifiers

High performance amplifier
ALT-C308 chassis and ALT-R-L1-021
amplifier module
ETL solution & roles:
• Full RF design
• Customisation: new RF module
developed to meet the
requirements
• Supply of amplifiers.
• Full FAT report.
The brief: develop new 1+1 redundant amplifier to address WGS
specifications. 2nd order harmonic <=-63dBc with -10 dBm input; 10-35 dB
gain; 1 dB GCP >=29 dBm; gain flatness <=±0.9dB over 1000 Mhz; NF <=20dB
at 35 dB gain; 950-2050 MHz.
Path-2
Path-1
INPUT-B
INPUT-A
OUTPUT-B
OUTPUT-A

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Routing Your Satellite Signal – Old vs New

ETL Advice
• Do ask for advice from the manufacturer – they know whats
possible and what has been done by others
• Trust in the best you can afford – it will give you peace of mind
• Ask for the MTBF and MTTR figures – these show the quality of the
components and the quality of the design.
• Design for the future – the number and type of satcomms signals
continues to grow.

Etl andrew bond_sspi_maio_2015

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