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Tuesday, 12 December 2017

NOS (former TV Cabo) finally released their DVB-C bouquet in FTA!

Yesterday I received some good news for a change! I got an e-mail from NOS, who are better known as "TV Cabo", telling me that my TV could now render more than 110 channels.

After a quick reading, the issue was crystal clear: NOS has come to senses and removed their encryption on the base bouquet! This means that any TV equipped with a DVB-C tuner will be able to show all 110 channels of the base bouquet.

Before, you needed to rent an official NOS DVB-C receiver, but you could only have up to three and they cost extra money, of course. Well in a home like mine, we have 5+ permanent TV sets installed (not to mention my shack, which has at least another TV, if not more).

I always wondered why they would encrypt ALL their DVB-C channels (except a few international channels, which are FTA on satellite - I think for DRM reasons NOS had to keep them FTA when retransmitting them in their network).

Here are two pictures grabbed from my Emitor Megalook, which I managed to repair after studying the fault over 4 months... More info about that journey at EEV-Blog: http://www.eevblog.com/forum/repair/attempting-repair-of-tv-tuner/


The complete CATV spectrum as used by NOS

Constellation diagram of transponder at 354MHz, using QAM256

Update on 10/01/2018:
Yesterday NOS changed the channel plan once again,
so the following list is not correct anymore!

Here is the channel list for PORTO area:
  • 121500 kHz QAM256 SR6.000 kBaud/s
  • 184500 kHz QAM128 SR6.000 kBaud/s
  • 170500 kHz QAM256 SR6.000 kBaud/s
  • 219500 kHz QAM256 SR6.000 kBaud/s
  • 240500 kHz QAM256 SR6.000 kBaud/s
  • 247500 kHz QAM128 SR6.000 kBaud/s
  • 254500 kHz QAM256 SR6.000 kBaud/s
  • 261500 kHz QAM256 SR6.000 kBaud/s
  • 306000 kHz QAM256 SR6.875 kBaud/s
  • 314000 kHz QAM256 SR6.875 kBaud/s
  • 322000 kHz QAM256 SR6.875 kBaud/s
  • 330000 kHz QAM256 SR6.875 kBaud/s
  • 354000 kHz QAM256 SR6.875 kBaud/s
  • 362000 kHz QAM256 SR6.875 kBaud/s
  • 386000 kHz QAM256 SR6.875 kBaud/s
  • 426000 kHz QAM256 SR6.875 kBaud/s
  • 474000 kHz QAM256 SR6.875 kBaud/s
  • 490000 kHz QAM256 SR6.875 kBaud/s
  • 562000 kHz QAM128 SR6.875 kBaud/s
  • 570000 kHz QAM128 SR6.875 kBaud/s
  • 602000 kHz QAM256 SR6.875 kBaud/s
  • 626000 kHz QAM128 SR6.875 kBaud/s
  • 634000 kHz QAM128 SR6.875 kBaud/s
  • 658000 kHz QAM256 SR6.875 kBaud/s
  • 674000 kHz QAM256 SR6.875 kBaud/s
  • 690000 kHz QAM256 SR6.875 kBaud/s
  • 714000 kHz QAM64  SR6.875 kBaud/s
It is now debatable if it wouldn't have been a better choice to distribute these channels with DVB-T modulation, instead, as the required DVB-T receivers are more common and cheaper (thanks to the TDT - "Terrestrial Digital Television"). But that would of course mean a significant investment for NOS, to change all equipment.

So at the end of the day, yes, I am happy. No more noisy analogue pictures, welcome to the digital TV on ALL screens of the house.

The final question is: Will NOS keep the analogue channels? Or will they be shut off after a given transition period? What would the free frequency ranges be used for?

Regards,
Vitor


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