Re: What do you think about this airline vs 5G brouhaha?

[Jay Hennigan <jay () west net>]

On 1/21/22 11:10, Michael Thomas wrote:

> For commercial airlines is it just old equipment or all equipment that 
> has this error? That is, is there actually an off the shelf radio that 
> would solve the problem?

I'm not qualified to answer. Avionics needs to go through a testing 
program called TSO.

https://www.faa.gov/aircraft/air_cert/production_approvals/tsoa/

The FAA certainly could require that the radar meet the specs. There are 
several off-the-shelf waveguide filters that are -60dB at 20 MHZ 
out-of-band readily available within that frequency range but a quick 
search doesn't show anything off-the-shelf with the radar band as the 
passband.

It certainly seems that sufficient selectivity within the radar set to 
avoid interference is well within the state of the art and has been for 
some time. Whether FAA has tightened the spec in the last 30-plus years 
is up to them to answer.

--
Jay Hennigan - jay () west net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV