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DVB-S2 
The User Experience 
David Taylor 
SatSignal Software 
Edinburgh
DVB-S2 
• Requirements 
– Antenna & LNB 
– Receiver 
• Making the transition 
• Resolving problems you may encounter 
• Outstanding issues 
• Still to come…
Antennas 
• The new satellite footprint is weaker 
• The bandwidth is larger 
• A better signal-to-noise is required 
• So …. 
• …. a bigger antenna may be required
LNB 
• A critical component 
• Don’t believe a 0.1 dB noise factor! 
• Need a low-noise LNB 
– Extensive tests by Arne van Belle 
– Inverto Black Ultra IDLB-TWNL40-ULTRA-OPP 
• Adjust skew for best Es/No 
• Adjust focus (move LNB in and out)
Receivers 
• PCIe card inside your PC – single PC 
– TBS 6925 & TBS 6983 
• External USB box – single PC 
– TBS 5925 – software still relatively new 
• External IP receiver – serves many PCs 
– Ayecka SR 1 
– Novra S300E 
– … and others
PCs 
• DVB-S2 may stress your PC more, 
especially the High Volume Service 
• There may be compatibility issues with 
some PCIe cards and some PCs 
– Suck it and see approach! 
• IP receivers need a network port 
– May need a second network card, and one 
with up-to-date drivers 
– Try Edimax Ethernet-to-USB 2.0 adapter
Making the transition 
• Start with DVB-S 
• Set up your new receiver 
• Re-point the antenna 
• Switch to DVB-S2
Starting with DVB-S 
• Assume you have a working DVB-S 
system looking at the 9° East satellite 
• Study receiver options and decide which is 
best for you – USB, PCI card, IP RX 
• Procure DVB-S2 receiver 
• Run in parallel with your existing receiver
Setting up the receiver 
• For Ayecka, Novra & TBS EUMETSAT 
provide configuration guides 
• Ayecka and Novra configuration files are 
provided, automating the setup over a USB 
or network link 
• TBS setup is currently a much more 
manual process, which may require 3rd 
party software running on your PC
Setting up the PC 
• IP receivers – 2nd network card 
– Either: add second network card or Ethernet- 
USB adapter & configure its address 
– Or: Wi-Fi connect the PC Wi-Fi, use existing 
LAN port 
– Connect Management port to house LAN 
• USB/PCIe receivers 
– Follow configuration guide for the device
Configuring TelliCast 
• Just one step! 
– Edit your recv.ini file to point to the new 
network device (card or virtual device) 
– But not the IP Receiver’s address!
Re-pointing the antenna 
• Change between 9° East and 10° East will 
depend where you are, a little east and very 
slight elevation change 
• Having peaked on 9A originally, tweak the 
disk azimuth just a little, then optimise 
both azimuth and elevation 
• Use a professional meter, or watch the 
graphical output from the Ayecka or other 
software.
Can I still get DVB-S? 
• Antenna has only moved a small amount, 
so likely you will still get enough DVB-S 
signal to continue with the service 
• Ayecka particularly easy to switch 
between the services
LNB adjustment 
• Adjust the skew (rotation) of the LNB for 
best signal-to-noise. Objective is to reduce 
the amount of cross-polarised signal 
received from other transponders 
• Adjust the focus of the LNB (in and out) 
for best SNR 
• Keep tweaking!
Switching to DVB-S2 
• Ayecka – already has two receiver 
configuration sets programmed so just 
make setting 2 (DBV-S2) active 
• Novra – re-run the configuration process 
selecting the DVB-S2 CFG file 
• TBS – type in all the new RF and PID 
configuration details 
• Edit recv.ini if not already done before
What can possibly go wrong! 
• Dish issues 
• Network issues
LNBs too far apart
LNB fallen off
LNB pointing in the wrong 
direction
Wrong IP address 
• Tempting to use the address of the IP 
receiver when editing recv.ini. 
• Not right! You need the address of the 
network card in the PC. 
• Not the address of the sender 
• But the address of the receiving card
Not using a separate network 
• The full EUMETCast stream which comes 
out of the IP Receiver will saturate a Wi-Fi 
or 100 Mb/s network. 
• So use a separate LAN 
• Not complicated – simply connect a 
network lead between the IP Receiver and 
a port on your PC. 
• Or use a small switch like Netgear GS605 
for multiple PCs.
Using poor cables 
or 100 Mb/s network 
• Using 100 Mb/s switch and random cables, 
found some odd missed packet events in 
early tests, but most packets recovered. 
• Not seen since using 1 Gb/s switch and 1 
Gb/s LAN cards. 
• Should check cables are “gigabit” certified. 
• Cat 5E likely good enough.
Need to wake network card? 
• On one PC, found the need to PING the remote 
receiver before starting TelliCast. 
• Perhaps the LAN port sleeps even though UDP 
packets are present? 
• Solved with a simple .CMD file: 
– PING <LAN adapter> 
– Wait a little 
– PING <SR 1 receiver> 
– Wait a little 
– Start tc-recv.exe
Problems seeing the network? 
• TelliCast may have problems identifying 
which network to use. 
• Solve by: 
– Setting the network address to 0.0.0.0 in 
recv.ini 
– Leaving out the interface_address altogether
Outstanding Issues – 1 
• Lower Link Margin 
– Because of small antenna or rain fade 
• When taking Basic & HV services 
– Link margin becomes too low for HVS 
– Results in many errors on the Basic Service 
• Arne van Belle has done many tests
Resolving Lower Link Margin 
• Fix – change Ayecka receiver settings: 
– Tweak the thresholds, low: 0.6 high: 0.7 dB 
• Fix – prevent HVS reception 
– Ayecka, set dual receiver mode 
– TBS requires software setting, but 
BDADataEx doesn’t allow this 
– Novra receiver?
Outstanding Issues – 2 
• The High Volume Service? 
– Problems taking BS & HVS on one receiver? 
– Receiver, driver or TelliCast resolution? 
• Request for more open and complete 
information about HVS tests 
– Changes seen but not announced? 
– Need to know the number of files being sent 
so we can check whether all files are received
Outstanding Issues – 3 
• The new TelliCast software 
– Resolve multicast join/leave problem? 
– Beta test programme? 
– Signed Java application? 
• Support 
– PC & OS requirements? 
– Compatibility with disk defragmenters 
– Compatibility with NTFS file system 
– Easy to update?
Acknowledgements 
• To Ayecka, Novra, TBS and GEO for procuring 
test receivers. 
• To EUMETSAT for answering many questions 
and providing extensive User Guides 
• To David Simmons, Alan Banks, Arne van Belle, 
Douglas Deans, James Brown, Ernst Lobsiger, 
and others for their testing and for discovering 
some of the issues and asking helpful questions!

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DVB-S2 migration - A user's experience - EUMETCast User Forum 2014

  • 1. DVB-S2 The User Experience David Taylor SatSignal Software Edinburgh
  • 2. DVB-S2 • Requirements – Antenna & LNB – Receiver • Making the transition • Resolving problems you may encounter • Outstanding issues • Still to come…
  • 3. Antennas • The new satellite footprint is weaker • The bandwidth is larger • A better signal-to-noise is required • So …. • …. a bigger antenna may be required
  • 4. LNB • A critical component • Don’t believe a 0.1 dB noise factor! • Need a low-noise LNB – Extensive tests by Arne van Belle – Inverto Black Ultra IDLB-TWNL40-ULTRA-OPP • Adjust skew for best Es/No • Adjust focus (move LNB in and out)
  • 5. Receivers • PCIe card inside your PC – single PC – TBS 6925 & TBS 6983 • External USB box – single PC – TBS 5925 – software still relatively new • External IP receiver – serves many PCs – Ayecka SR 1 – Novra S300E – … and others
  • 6. PCs • DVB-S2 may stress your PC more, especially the High Volume Service • There may be compatibility issues with some PCIe cards and some PCs – Suck it and see approach! • IP receivers need a network port – May need a second network card, and one with up-to-date drivers – Try Edimax Ethernet-to-USB 2.0 adapter
  • 7. Making the transition • Start with DVB-S • Set up your new receiver • Re-point the antenna • Switch to DVB-S2
  • 8. Starting with DVB-S • Assume you have a working DVB-S system looking at the 9° East satellite • Study receiver options and decide which is best for you – USB, PCI card, IP RX • Procure DVB-S2 receiver • Run in parallel with your existing receiver
  • 9. Setting up the receiver • For Ayecka, Novra & TBS EUMETSAT provide configuration guides • Ayecka and Novra configuration files are provided, automating the setup over a USB or network link • TBS setup is currently a much more manual process, which may require 3rd party software running on your PC
  • 10. Setting up the PC • IP receivers – 2nd network card – Either: add second network card or Ethernet- USB adapter & configure its address – Or: Wi-Fi connect the PC Wi-Fi, use existing LAN port – Connect Management port to house LAN • USB/PCIe receivers – Follow configuration guide for the device
  • 11. Configuring TelliCast • Just one step! – Edit your recv.ini file to point to the new network device (card or virtual device) – But not the IP Receiver’s address!
  • 12. Re-pointing the antenna • Change between 9° East and 10° East will depend where you are, a little east and very slight elevation change • Having peaked on 9A originally, tweak the disk azimuth just a little, then optimise both azimuth and elevation • Use a professional meter, or watch the graphical output from the Ayecka or other software.
  • 13. Can I still get DVB-S? • Antenna has only moved a small amount, so likely you will still get enough DVB-S signal to continue with the service • Ayecka particularly easy to switch between the services
  • 14. LNB adjustment • Adjust the skew (rotation) of the LNB for best signal-to-noise. Objective is to reduce the amount of cross-polarised signal received from other transponders • Adjust the focus of the LNB (in and out) for best SNR • Keep tweaking!
  • 15. Switching to DVB-S2 • Ayecka – already has two receiver configuration sets programmed so just make setting 2 (DBV-S2) active • Novra – re-run the configuration process selecting the DVB-S2 CFG file • TBS – type in all the new RF and PID configuration details • Edit recv.ini if not already done before
  • 16. What can possibly go wrong! • Dish issues • Network issues
  • 17. LNBs too far apart
  • 19. LNB pointing in the wrong direction
  • 20. Wrong IP address • Tempting to use the address of the IP receiver when editing recv.ini. • Not right! You need the address of the network card in the PC. • Not the address of the sender • But the address of the receiving card
  • 21. Not using a separate network • The full EUMETCast stream which comes out of the IP Receiver will saturate a Wi-Fi or 100 Mb/s network. • So use a separate LAN • Not complicated – simply connect a network lead between the IP Receiver and a port on your PC. • Or use a small switch like Netgear GS605 for multiple PCs.
  • 22. Using poor cables or 100 Mb/s network • Using 100 Mb/s switch and random cables, found some odd missed packet events in early tests, but most packets recovered. • Not seen since using 1 Gb/s switch and 1 Gb/s LAN cards. • Should check cables are “gigabit” certified. • Cat 5E likely good enough.
  • 23. Need to wake network card? • On one PC, found the need to PING the remote receiver before starting TelliCast. • Perhaps the LAN port sleeps even though UDP packets are present? • Solved with a simple .CMD file: – PING <LAN adapter> – Wait a little – PING <SR 1 receiver> – Wait a little – Start tc-recv.exe
  • 24. Problems seeing the network? • TelliCast may have problems identifying which network to use. • Solve by: – Setting the network address to 0.0.0.0 in recv.ini – Leaving out the interface_address altogether
  • 25. Outstanding Issues – 1 • Lower Link Margin – Because of small antenna or rain fade • When taking Basic & HV services – Link margin becomes too low for HVS – Results in many errors on the Basic Service • Arne van Belle has done many tests
  • 26.
  • 27. Resolving Lower Link Margin • Fix – change Ayecka receiver settings: – Tweak the thresholds, low: 0.6 high: 0.7 dB • Fix – prevent HVS reception – Ayecka, set dual receiver mode – TBS requires software setting, but BDADataEx doesn’t allow this – Novra receiver?
  • 28. Outstanding Issues – 2 • The High Volume Service? – Problems taking BS & HVS on one receiver? – Receiver, driver or TelliCast resolution? • Request for more open and complete information about HVS tests – Changes seen but not announced? – Need to know the number of files being sent so we can check whether all files are received
  • 29. Outstanding Issues – 3 • The new TelliCast software – Resolve multicast join/leave problem? – Beta test programme? – Signed Java application? • Support – PC & OS requirements? – Compatibility with disk defragmenters – Compatibility with NTFS file system – Easy to update?
  • 30. Acknowledgements • To Ayecka, Novra, TBS and GEO for procuring test receivers. • To EUMETSAT for answering many questions and providing extensive User Guides • To David Simmons, Alan Banks, Arne van Belle, Douglas Deans, James Brown, Ernst Lobsiger, and others for their testing and for discovering some of the issues and asking helpful questions!