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The Invisible And Silent Bullet
The invisible and silent bullet.
Here is a question. What is invisible to the human eye, silent, can penetrate a building, cause computer systems to crash, and blow fuses? No, it’s not a virus. The answer is radio waves! We all know that radio waves, or RF (radio frequency) emissions can be dangerous. It’s common knowledge that the 800mhz signals from our cell phones penetrate our brains and can cause cancer. But we all live with that risk, and play the game of life taking the risk along with all the other chance exposures, like crossing the street and hoping not to be run over by a truck. What is interesting to me is how we all have come to live with these invisible waves, surges and swells of electrons that pass through us everyday. What to worry, they are part of modern civilization and it’s a cost of doing business, correct?
One problem with the ignorance of exactly WHAT radio waves are going on, is that we don’t have a baseline, and we ignore what is normal. Similar to the adage of if you don’t measure something, you can’t improve it. Except here, the improvement we are talking about is to understand radio, so that you can prevent interference which degrades performance. Or to understand radio so you can identify who sent the radio signal that triggered the bomb. So what should we know about RF?
In my opinion, large organizations that rely on multiple radios systems must have some radio engineer on staff. He may not need to be an EE with a degree in RF design, but at minimum a radio tech or staff person, who can use a spectrum analyzer and is familiar with the radio signals your organization uses.
The take away lesson from this: Ensure that there is someone who knows at least a baseline of how your radio systems work, from a radio frequency standpoint. That means they need to know how far their signals should travel, how often they get interference, and so on. For large organizations, an RF expert who can diagnose interference, sources of radio emissions, and perform baseline checks of radio equipment is mandatory. Ability to use a spectrum analyzer (and have one on hand) is important.
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