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I'm sure we're boring most of the folks reading this, but I just had to respond to that.
Surely, as a degreed EE, you are well aware that various electronic devices often end up picking up unwanted signals due to failures, corroded connections, or just plain bad design.
In my 35 years of designing, troubleshooting, and integrating telemetry, data acquisition systems, laboratory instruments, radio links, telephone modems and interface equipment, etc., I've seen quite a bit of badly designed or improperly functioning equipment which, unfortunately *does* pick up RF when it's not supposed to do so.
I've seen alarm system PIR detectors respond to police band (150 band FM) transmissions. I've seen tank-level monitors go nuts when company personnel were in the area yacking on their business band radios. I've seen gas chromatographs in a mud-logging truck go bananas when someone keyed up a CB. And I've seen inductively coupled plasma mass spectrometers interfere with their own selves
None of that was the design intent. But it happened nonetheless.
The point is that just because a device is designed to monitor one type of signal does not guarantee that it's impervious to unintended interference from all manner of signals.
In fact, if you look at the paperwork that comes with just about any piece of consumer electronics, you'll often see the required Part 15 labeling specifying:
§ 15.19 labeling requirements.
(a) In addition to the requirements in part 2 of this chapter, a device subject to certification, notification, or verification shall be labeled as follows:
(3) All other devices shall bear the following statement in a conspicuous location on the device:
"This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. "
So if my properly operating, licensed ham station, putting out 1500 Watts next door to you makes your TV, VCR, Computer, cordless phone, or electric drill go nuts, that's too bad, and it's your responsibility. And if that device causes harmful interference to my ham station (licensed service), then you've got to cease and desist in using it or get it fixed so that it doesn't interfere.
My point with that is just to show that "undesired operation", caused by interference from nearby RF sources is so common that how it's dealt with is even codified in the CFR.
My comment about it being a CB was meant mostly tongue in cheek. But the fact is that it very well *could* be RF interference we're seeing. I'd vote more for the air sampling pump, but....
Anyhow, I'm sure we're driving everyone nuts with this.
And if people want to believe that this is a top secret geyser or harmonic tremor. That's fine. But I'm just offering what my many years of experience in this field tells me is the most likely scenario.
And to me, that's that it is man-caused in some way.
Originally posted by SpadeofAces
reply to post by Mushussu
haha. close enough in my book. But...it's funny, one hit 8 miles from my house last night at 5:30, check it out so. cal. yes, it was a small one, but I put up the prediction for one maybe 3 horus before. I do think anywhere from the Rocky Mountains-West Coast is gonna get hit by a 6.0+ in the near future.
[edit on 17-1-2009 by SpadeofAces]
Originally posted by VX-7R
I'm sure we're boring most of the folks reading this, but I just had to respond to that.
Surely, as a degreed EE, you are well aware that various electronic devices often end up picking up unwanted signals due to failures, corroded connections, or just plain bad design.
Originally posted by VX-7R
In my 35 years of designing, troubleshooting, and integrating telemetry, data acquisition systems, laboratory instruments, radio links, telephone modems and interface equipment, etc., I've seen quite a bit of badly designed or improperly functioning equipment which, unfortunately *does* pick up RF when it's not supposed to do so.
Originally posted by VX-7R
I've seen alarm system PIR detectors respond to police band (150 band FM) transmissions. I've seen tank-level monitors go nuts when company personnel were in the area yacking on their business band radios. I've seen gas chromatographs in a mud-logging truck go bananas when someone keyed up a CB. And I've seen inductively coupled plasma mass spectrometers interfere with their own selves
Originally posted by VX-7R
None of that was the design intent. But it happened nonetheless.
The point is that just because a device is designed to monitor one type of signal does not guarantee that it's impervious to unintended interference from all manner of signals.
In fact, if you look at the paperwork that comes with just about any piece of consumer electronics, you'll often see the required Part 15 labeling specifying:
§ 15.19 labeling requirements.
(a) In addition to the requirements in part 2 of this chapter, a device subject to certification, notification, or verification shall be labeled as follows:
(3) All other devices shall bear the following statement in a conspicuous location on the device:
"This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. "
So if my properly operating, licensed ham station, putting out 1500 Watts next door to you makes your TV, VCR, Computer, cordless phone, or electric drill go nuts, that's too bad, and it's your responsibility. And if that device causes harmful interference to my ham station (licensed service), then you've got to cease and desist in using it or get it fixed so that it doesn't interfere.
Originally posted by VX-7R
My point with that is just to show that "undesired operation", caused by interference from nearby RF sources is so common that how it's dealt with is even codified in the CFR.
My comment about it being a CB was meant mostly tongue in cheek. But the fact is that it very well *could* be RF interference we're seeing. I'd vote more for the air sampling pump, but....
Anyhow, I'm sure we're driving everyone nuts with this.
And if people want to believe that this is a top secret geyser or harmonic tremor. That's fine. But I'm just offering what my many years of experience in this field tells me is the most likely scenario.
And to me, that's that it is man-caused in some way.
Originally posted by manotick
reply to post by questioningall
If the buffalo start to stampede.....run
U.S. Geological Survey officials say the quake registered a magnitude 3.7, although officials with the Geologists of Jackson Hole say the federal agency likely will revise that estimate to a magnitude 4.0 after researchers take a closer look at the data. The quake occurred on the south end of a so-called “seismic gap” that extends north into Yellowstone National Park, where an earthquake swarm of more than 500 earthquakes shook the ground near Yellowstone Lake earlier this year, said Peter Ward, a Geologists of Jackson Hole board member and a former earthquake specialist with the U.S. Geological Survey. Ward said the gap is an area of low seismic activity on the Teton Fault surrounded by areas of high activity. Other seismic gaps around the globe have resulted in large earthquakes, but that may not apply here, he said. “That is exactly the zone that broke in the last, biggest Teton Fault earthquake,” Ward said. “They go for a long period of time without any activity. There’s no way of being able to predict whether the earthquake will be tonight or whether it will be in 100 years.” “The chance of anything happening is very, very, very low,” he said. “We are very concerned that people not get overexcited. It’s like fastening the seat belt in your car; it is reasonable to take a few precautions. It’s simply a wake-up call.” Ward advised residents to make a family emergency plan, store emergency supplies, make sure gas connections are flexible, and fasten down delicate things around the home. Ward said it is particularly important to remove heavy items from over beds so they don’t fall on a sleeping individual during a quake. Family members also should know how to shut off water, gas and electric inputs to the home. Wally Ulrich, Wyoming Geological Survey Board chairman, agreed. “Be prepared and pay attention,” he said. “It’s part of living here.” Ulrich called the Teton Fault an “ominously silent area.” “When you get activity on both ends, it makes geologists look very carefully because it may or may not have an effect on the structure that is there. This is a real concern of ours. People shouldn’t panic; just be prudent,” he said. Wyoming State Geological Survey Director Ronald C. Surdam said more monitoring equipment is needed in the area to analyze seismic events.