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Mobile firms agree another 5G delay at US airports


Mekong
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So US Manufactured Aviall, as used on Boeing Bad, French Manufactured Thales, as used on Airbus Good?
 

The Aviall band pass filter on their Altimeter has not been an issue for 30 years, the Altimeter is not the issue, the problem is which ever dickhead signed off on 3.7 to 3.98 GHz frequency for C Band in the USA instead of the 3.4 to 3.8 used in Europe and the rest of the world.

if it was the Boeing Aviall altimeter at fault Boeingwould have problems globally not just in the USA

How thick was that brown envelope?

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https://www.faa.gov/5g

Approved radio altimeters will allow commercial aircraft to continue low-visibility landings in the 5G C-Band deployment areas.
The agency has made progress during the last two weeks to safely reduce the risk of delays and cancellations as altimeter manufacturers evaluate data from the wireless companies to determine how robust each model is. This work has shown some altimeters are reliable and accurate in certain 5G areas; others must be retrofitted or replaced. 

This testing should have been done years ago.

Models with one of 13 cleared altimeters include:

  • All Boeing 717, 737, 747, 757, 767, 777, 787
  • MD-10/-11
  • All Airbus A300, A310, A319, A320, A321, A330, A340, A350, A380
  • Some Embraer 170 & 190 regional jets
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https://spectrum.ieee.org/5g-faa

In Europe, for example, 5G midband rollouts have proceeded without much concern for radio altimeters, because the spectrum allocated is at just slightly lower frequencies (3.4–3.8 GHz in Europe, as opposed to the mentioned 3.7–3.98 GHz in the United States). Meanwhile, countries like Canada have installed buffer zones like the ones AT&T and Verizon have agreed to. The Australian Communications and Media Authority has said it believes that a 200-MHz guard band (like the one in the United States) between 5G networks and radio altimeters is sufficient in itself.

And it remains to be seen whether the FAA is acting simply out of an abundance of caution. Currently, Ireland, Denmark, and Finland have operating 5G networks with midband signals that are more powerful than approved in the United States, with no effect on altimeters.

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They need to stop using the word a C-Band

 

C Band frequency is assigned buy the ITU and differs per region

 

I have to be careful when sourcing gear

 

Much smarter and the common approach is just to say "X" frequency. If it's been used elsewhere, well so be it

 

Stop saying C-Band (from a bloke who thinks C Band has an essential role to play in Come)

 

If you look up C-Band zones you'll see there are three different ones as per ITU

 

note also I can't always move a satellite into another region and use the wrong frequency. We get our hands slapped

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They need to stop using the word a C-Band

 

C Band frequency is assigned buy the ITU and differs per region

 

I have to be careful when sourcing gear

 

Much smarter and the common approach is just to say "X" frequency. If it's been used elsewhere, well so be it

 

Stop saying C-Band (from a bloke who thinks C Band has an essential role to play in Come)

 

PS stop saying 5G it's a marketing term 

 

LTE release 18

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