For many years I myself have been angry about the FCC rules being relaxed about 20 years ago with regard to Part 15 Interference between devices.
The relaxed rules simply are no rules or standards that a device must be able to withstand some amount of RF energy before acting improperly.
This was to allow manufactures to not have to pass any tests and remove shielding in a cost cutting move.
This was not such a big deal when it happened as there were not 1/1000 the RF transmitters and not near as many potential receivers to interfere with but still I seen this at the time to just change the argument pitting neighbor against neighbor as if either one would really know why they could not watch their soap-opera when one of them was using a 2-way radio.
Times have changed and most devices that could cause interference and receive interference have increased and show no sign of not doubling every 2 years. Just watch and see how many iPads are sold in the first week when they are released to have a clue. Yes these devices just like the Kindle have a GSM cell phone embedded in them.
Now with 2 new problems to mention:
1 – Many of these devices are digital in nature
2 – Many of the new electronics have our lives in their control. i.e. cars and other transportation systems like Aircraft and Subways/Trains
Now take into account that the Toyota’s that are in the most hot water for doing things that they just should not be doing on their own. These cars are a FLY-BY-WIRE. Meaning that many of them do not have a direct mechanical control but the steering along with the accelerator and brakes are completely under computer actuation with computer controlled servo motors.
While I will take Toyota’s at their word that the computer systems on board function 100% correct, this would be without any outside influence of RF signals getting into the computer or its other on-board micro-controller systems that communicate with it.
All of this brings us to a new chapter in what type of rules we need going forward as the FCC is currently making new plans for mobile broadband including frequency & modulation standards for whole new groups of digital signals including Video for mobile broadband.
What is needed of the FCC here is at the same time they are making these plans, To Renew And Revise Part 15 and set some level of a standard of RFI resistance for devices that could have a life or death impact if a interference issue arise.
I’m sorry, I just don’t trust a company to ensure this on their own or we would not be speaking of it in the first place as this issue has been out there for at least 10 years.
How am I to feel safe knowing one of these steer by wire cars is driving down the lane towards me and some trucker with a CB radio using a illegal power amplifier and a improperly tuned antenna starts yakking on it and that car could steer into me when the driver looses control at no fault of his own!
OR
As happens from time to time, a amplifier in a cell tower or paging transmitter begins to breakdown and becomes spuratic (sending many unwanted signals) that does commonly happen and there are rules against this but how would anyone know it caused your car or plane to crash. What about a Cable TV system becomes leaky near its in line amplifiers used to keep signal levels up as the line gets longer.
Yes there must be new rules to govern any digital electronic systems with regard to Radio Frequency Interference ( RFI ) resistance when lives are at risk. I am sure this has happened 100’s of times and the real cause was never found.
So here is a set of YouTube Videos from TheMidnightEngineer in a rather boring but informative explanation of how this is happening with the Toyota’s in question.
Part 1 – Background FCC/Digital Radio Electronics/Anatomy of Car Electronics Control
Part 2 – Digital Interference In On-Board Systems