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Distress Signal Emitted By Flat-Screen TV
pinqkandi writes "CNN is a running a story on an Oregon college student's flat-screen Toshiba TV which was releasing the 121.5 MHz international distress signal. He was unaware of the issue until local police, search and rescue, and civil air patrol members showed up at his apartment's door. Apparently the signal was strong enough to be picked up by satellite and then routed to the Air Force Rescue Center in Virginia. Quite impressive - luckily Toshiba is offering him a free replacement."
It turns out it got stuck on the Lifetime network, so it really was in a state of distress.
I'd originally read this on CNet a while ago.
And the (CNet) article points out something of relevance - with so many new devices and what not, our radio spectrum is increasingly becoming very muddled and interference a lot more commonplace. I wonder if existing regulations would do, or if new ones be required.
Something to think about.
And I wonder how powerful that signal must have been to have caused such interference. Either that, or the receiving satellites must be having one hell of a resolution capability.
The latter also provides some food for thought - if their satellite equipment is sensitive enough to find out interfering signals from a Television set, wonder what else they can (and do) eavesdrop
What kind of Tempest attacks do take place, I wonder. Satellite Van Eck Phreaking?
~adjusts tinfoil hat~
"So if you need to transmit an international distress signal then stop by any local store and turn on a Toshiba flat-screen TV. We should be able to locate you in a matter of minutes."
You can relax now. The aliens aren't coming just yet.
. . . this is the last time that guy is a smartass to the salesman at Best Buy when buying a TV, though!
The TV probably gained sentience and realized the crap that was being fed to it. It responded in the only way it knew how.
Yeah, this gives me an idea for a new TV feature. Whenever you lose the remote control, it sends out a destress signal until a search team shows up to find it. Now that's service!
The Dude abides.
Big deal. Now, if that had been a free, unencrypted feed of the Spice or Playboy channels...
Cheers!
Ehttp://eugeneciurana.com | http://ciurana.eu
You've gotta wonder what that guy was doing to that poor TV. (and whether the teletubbies were involved...)
Warning!
This television will send out a distress signal to authorities whenever any program catering to an IQ of less than 80 is viewed. This includes games shows (Jeopardy excluded), reality shows, Spongebob Squarepants, and the CBS Evening News with Dan Rather.
No boom today. Boom tomorrow. There's always a boom tomorrow. - Cmdr. Susan Ivanova
I had a similar problem with my toaster emitting moorse code signals.
He shouldn't have been forcing the poor TV to play "Survivor".
It's well known that certain hardware hacks for Dishnetwork receivers emit this same frequency.
What a coincidence that a college student (no money) would be doing something technical (education) to get TV for free.
If you could be told what you can see or read, then it follows that you could be told what to say or think - BoC
"Please Help! My plasma is burning out! I'll need to be replaced in 2 years!"
We just spent $10K+ on in-house EMI equipment, to mitigate the costs of having an outside lab help with troubleshooting.
You have to do it if you make any kind of electronics, but it's a big burden for small manufacturers.
It'd be nice to have the choice of saying "this passes" vs "this probably passes". Current FCC/CE regs require everyone to meet the spec, and this is a bit onerous IMHO. It locks some innovative small companies out of the game.
http://www.navcen.uscg.gov/marcomms/gmdss/epirb.ht m
Animah S/V Solaris
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CNN is a running a story on an Oregon college student's flat-screen Toshiba TV which was releasing the 121.5 MHz international distress signal...
In other news, a man's 4-door sedan was emitting the 1.21 jigawatts necessary to power the flux capacitor. Christopher Lloyd was unavailible for comment.
It would be cool if it didn't suck.
Corvallis Gazette-Times has more details and a picture of the guy posing with his TV. Apparently, he mostly watches public broadcasting and has acquired a taste for all the quality children's programming it provides, especially "Arthur".
So we are supposed to trust companies to use their judgement and ethics when slaping a "This device probably meets federal EMI regulations" sticker on a device. I feel better already.
To make laws that man cannot, and will not obey, serves to bring all law into contempt.
--E.C. Stanton
It scares me that it took them almost a year to get the distress signal. Remind me never to get lost at sea.
Free Flat Screen
He was probably watching an ad with an image of new currency, and the TV detected the anti-counterfeit pattern. :-)
Can you really blame the TV for sending out an SOS? Be fair to it.
It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
In Soviet Russia, The TV Distresses YOU! ....oh wait...
I, too, was wondering about the specifics of this "international distress signal". Getting lucky (google) with "121.5 Mhz" gives the following link which specifies a relatively simple AM signal with less than 100 mW radiated power! That's not much these days, and I'm rather shocked (har har) that it's taken this long for a device to accidentally trigger such a search. Anyway...here's the URL...
http://www.cospas-sarsat.org/Beacons/121Bcns.htm
Your tinfoil hats
The guy bought the TV at MacGyvers yard sale.
I'm certainly glad that it was detected and responded to. I hope the spectrum doesn't get too messy and create this situation often, but it does show that someone is paying attention when there is a cry for help. (Thinking out in the ocean here).
TV:"Oh, please God.. I can't take another episode of "Survivor" and I'm so sick of "The Surreal Life" these days.. help me!"
On October 2, the 20 year-old college student was visited at his apartment in the small university town by a contingent of local police, civil air patrol and search and rescue personnel.
[...]
Authorities had expected to find a boat or small plane with a malfunctioning transponder, the usual culprit in such incidents, emitting the 121.5 MHz frequency of the distress signal used internationally.
Why did they expect to find a boat/plane in a apartment building?
^^
Langley: Forgive me, FCC, but I am receiving numerous distress signals.
FCC : I don't doubt it.
The reason for non-interference isn't to protect the manufacturer, it's to protect the public. What the holy blue devil makes you think this burden should be waived for small companies?
.... I'll start up a gas station, and since I'm a small company, I can dispense with all those silly safety regs. I'll put stickers on the pumps "You should probably not smoke around here."
Let's carry that concept on thru
Or I can start selling homemade cars, put in some cheap airbags made of a CO2 cartridge and a mousetrap on a hairspring for a trigger, along with a "probably works" disclaimer. That should do the trick.
Geez buddy, get a grip!
Infuriate left and right
Just a little something to keep in mind - all it takes is one (faulty) popular model putting out EMI interference to fuck up an entire range of the spectrum into unusability. So yes, I STRONGLY support keeping tight screws on EMI interference, because you can't rely on Corps to be ethical and act responsibly if it weren't legally mandated. And, as the Netgear NTP issue so eloquently demonstrates, even after you tell a company that they are doing harm and need to stop, they might not necessarily do it.
To make laws that man cannot, and will not obey, serves to bring all law into contempt.
--E.C. Stanton
What I wanna know is how a college student has a plasma TV. Aren't college kids supposed to be poor? Whatever happened to the trusty 13"er with bad reception?
IWARS.
People, in general, disappoint me. Politicians even more so.
It turns out that those government satellites are monitoring our TVs. Luckily, Toshiba sells tinfoil hats for closeup viewing.
--
make install -not war
And, if it is a "Class A" device, the manufacturer warrants that it will not interfere in a residential environment. (Though, many electronic devices sold for residential use are "Class B", requiring the operator to take corrective action if they interfere, and letting the manufacturer off the hook. Yes, this is a simplification)
I stand by my position: the manufacturer should be liable by virtue of their likely warranty that this won't happen. Yes, even if people die, because the device is operated. (And the manufacturer should be held accountable for the resulting wrongful deaths.)
If this were not the case, the manufacturer could just "walk away" from the defective unit, leaving the purchaser with a $5k-$15k television that they can't watch -- it still performs as a TV set, after all, and isn't "defective" with regard to it's primary functionality.
What should happen is that Toshiba should immediately come to terms to compensate the owner for the inconvenience in exchange for an agreement to not operate the set until a replacement is delivered. A rational settlement would be the cost to Toshiba if they had to compensate those expected to suffer because of the continuous operation of the set. So, if there was an expected 0.1% chance of $100,000,000 wrongful death suits, Toshiba should offer $100,000 and a repaired or replaced set in exchange for an agreement to not operate the defective one.
The simple replacement of the set is, IMHO, insufficient.
You could've hired me.
In the New Soviet Amerika, Tv watches You!
Down With Slashdot BETA!!! I've been around the corner and seen the oliphant; you can only abuse me from your perspecti
The frequency of the NTSC color subcarrier (the TV color system used in analog video standards in North America and Japan) is defined as exactly 5 MHz times 63/88. That works out to 3.579545454.... (infinitely repeating 54's) MHz. The horizontal scanning frequency is then defined as a 2/455 times the color subcarrier frequency. That works out to 15734.26573426.... (infinitely repeating 573426's) Hz (very nearly the original monochrome horizontal frequency of 15750 Hz). This is where the problem lies. 121.5 MHz divided by 7722 is exactly the same frequency as the horizontal in an NTSC color video signal.
The 7722nd harmonic shouldn't really be that strong, right? Usually not. But the harmonics can get to be very strong overall even at such high orders when dealing with modulating the high voltages needed for the horizontal sweep. There should be some low pass filters that prevent that from getting into the VHF range. But if the filters are absent, or were incorrectly installed, or were damaged somehow, and if some wires formed some resonance near 121.5 MHz (like wires going out to cable, speakers, etc) ... a wavelength of about 2.47 meters or 8.1 feet ... it is possible that harmonic, and a bunch of others near it, could be enhanced and radiated.
The local oscillator in the tuner is a remote possibility. But it would have to be tuned to be receiving a video carrier at 75.75 MHz based on the common satndard of 45.75 MHz for the IF stage in the tuner. But there is no TV broadcast on that frequency in the US ... though I could not rule out there being something on that frequency from a cable system. Still, it wouldn't be an expected place for a TV to tune to. But if the TV has a non-standard IF frequency, the local oscillator getting on 121.5 MHz by some expected channel could be possible. Those leak a lot and it's how the snoops can tell what channel you are tuned to by spying on the RF emitted from your house.
If just this one TV had the problem, then apparently it must be a manufacturing defect or shipping damage (or maybe user damage or tampering). If it were a design problem, I'd sure we'd hear more about it. That probably rules out the CPU clock frequency.
now we need to go OSS in diesel cars
..because he thought that the RIAA had finally caught up with him...
Why do you think they currently react to "emergencies" like this leaking tv? Because if they don't someone could die.
Rescue services have to respond to every call even if they know it is false. Because if they guess wrong peoples life are at stake.
They also can't just send a clerk on a moped to find out because if it is real that would loose time.
It says a lot about politicians that in these days of cutbacks no-one is doing anything to cut down on the money wasted by deliberate false emergcengy calls. Send the kids to a few months of re-education. Post 9/11 it should be easy to label them as the terrorists they are.
And no I never made a crank emergency call as a kid. There are just somethings you don't do.
MMO Quests are like orgasms:
You may solo them, I prefer them in a group.
I might buy a toshiba flat screen tv in the hope that it releases a 132.7 MHz international playboy signal !
"The Minions of Satan, I mean Time-Warner Cable"
I'm not directed this to you, so please don't take offense. But its comments like these that I hear often that basically state that cable companies are evil and greedy. I'm not saying you're saying this, but for the most part that's the kind of flak I hear about TWC.
What most people don't realize is that paying for the fiber and coax, installing it yourself, and maintaining it costs major money. And trust me when I say Mother Nature causes havoc on our network (slow modems, disconnects, poor reception, macro blocking = very irate customers). Also, TWC does NOT make money on TV stations. Where we do make our bread and butter is on the recording features and on-demand access, but also on the Road Runner subscriptions. Other then that, your local cable company in large cities are nothing more then a conduit for capturing content from satellite and piping it through your home. Also, lets not forget the employee and leased equipment expenses as well that customers are having to pay.
I'm not saying TWC isn't a profitable business, because it is. But it's not like we are making hand-over-fist either. There is competition in Austin, and we know it....which is a good thing for the customer as a whole including myself. But please, would people stop this 1980s concept of cable companies being a monopoly!
Life is not for the lazy.
You are an idiot.
And the competitors in India and China don't have this certification rubbish.
Any and all electrical and electronic equipment in the US is subject to regulations, whether they are manufactured inhouse or imported - to prevent unwanted and potentially harmful interference.
bureaucratic goverment drones like you impose a mountain of useless paperwork on small businesses.
I happen to be the owner of a small business myself, and I find the regulations to be quite useful and justified, they're the reasons we do not have a million conflicting parts and standards out there.
But a small business is killed by such stuff.
Yes, and people are killed if there were no regulations. Would you rather have someone die because an CD-player interfered with their pacemaker interfered, or would you rather help small businesses "prosper".
Btw, the reason China is providing cheap stuff is because they have little or no laws on labour condition and blatantly practice harmful trade practices like under-pricing. I guess if we could make you work in a sweatshop for 20 hours a day for a pittance, you would be happy?
Get your facts straight before talking through your ass.
"I had a TV (also by Toshiba, coincidently) that would crash when it showed the local community channel."
My TV (a Panasonic) has a similar problem with DVB (i.e. terestrial digital tv) in the UK. It will sometimes lock-up and I have to power it off completely in order to get it to work. I presume it's either due to poor transmission error handling or bad coding when handling the interactive menus that can be broadcast with DVB.
Flawed Routers Flood University of Wisconsin Internet Time Server
And how is this thing the size of a coin going to generate enough power at >100 GHz to achieve communication with a satellite? Sounds kind of sketchy to me.
Obviously the TV thought it had been stolen. Did the cops check for that?
Hm. If only Mr. Howell had been a gadget freak, perhaps they all would have been rescued...
For your security, this post has been encrypted with ROT-13, twice.
If you want to do wiring yourself, here's what you should be looking for:
Hope that helps
I was recently given a TV by a friend, who had upgraded hers.
I very rarely watch tv, as I find few shows are a reasonable quality. When I do watch TV, the new tv occasionally crashes. When it crashes, it simply switches off, and won't restart for long periods of time (even after unplugging for several minutes). I wonder if it's a software thing?
Are TV's really this prone to poor programming practices?
It sure would be interesting to know why the TV in the article was emitting that frequency... an extra solder bridge? Poor programming? Malfunctioning display?
I guess the picture was still fine, or the owner would have returned it earlier, right?
How many other domestic devices that are FCC compliant, with the little 'rf safe' type stickers generate stong RF like this? I've often wondered about mice and motherboards, because I have occasionally run across a computer where the speakers pick up the digital signal from the encoders in the mice. So when the mouse is moved, you can hear a clicking sound from the speakers.
In industrial espionage, the easiest way to get information is to entrap a worker by paying him some seemingly large sum for some seemingly trivial bit of information. From this point on, the pay goes down and the quality of the info goes up as you've now got the stick (loss of job and reputation plus possible criminal prosecution) as well as the carrot.
That's the way you "flip" someone with any kind of espionage not only industrial. I'm wondering where your point about possible criminal prosecution comes into play for industrial espionage? If I tell a competitor some trade secret about my employer I haven't broken any laws -- my employer can sue me and probably ruin my life but they can't put me behind bars. And unless you have some sort of NDA it's likely that all they could do is fire you.
Of course that's not to say that other laws wouldn't have been broken. If anyone ever offers me a large sum of money to sell out my employer I'll make sure they 1099 it and that I claim it on my income taxes ;)
I want peace on earth and goodwill toward man.
We are the United States Government! We don't do that sort of thing.
If I remember correctly from my CAP (Civil Air Patrol) days, 121.5 is the "test" emergency freq while 121.6 is the actual "live" freq. (Any cadets reading this, please feel free to correct me if I'm wrong - it's been a LONG time).
Most aircraft are fitted with a small transmitter (about the size of a pack of cigarettes) that will start squaking on certian conditions. Sometimes a hard landing would be enough to set one off.
Back in the day (late 80's), SAR (Search and Rescue) teams used a device called an L-per which was basically a reciever mounted on a large hand-held directional antenna. The operator would go to the appoximate location of the crash, determine which direction the signal was coming from and then move about a mile in a perpendicular direction. The op would take another reading and repeat the process one more time, triangulating the position of the downed aircraft.
Of course now they probably have fancy-schmancy wiz-bag computers to do all of that for them.
Any other CAP members out there?
C/FO Martin Dinstuhl (Ret.)
Alpha Flight Commander, 144th Air Rescue & Recovery Squadron
TN Wing
121.5Mhz is used in Emergency Locator Transmitters (ELTs) that go in civilian aircraft. When the aircraft crashes (or even has a hard landing every once in a while) it starts trasmnitting. The military uses 243Mhz (harmonic). The transmission is picked up by SARSAT (search and rescue satellite) and then the relevent emergency services resources are called into action.
There actually IS a frequecny for international distress calls (which i don't remember off hand) but it's not 121.5Mhz or 243Mhz. It's illegal to broadcast a distress call on those frequencies. If you use one of those hiker distress thingies that they sell in catalogs don't be surprised to meet a frustrated CAP ground team and an angry Sherrif.
"Let him go, Ralph. He knows what he's doing." --Otto Mann (simpsons)
As a phone tech support guy, I got a call from someone complaining "whenever I try to use my laptop to dial up the company computer, the police show up at my front door."
Turns out the guy had gone to a hotel on business. Getting an outside line required dialing 9-1, then the desired phone number: 1-800-...-.... Upon returning home, the unmodified dialer dutifully dialed 9-1-1-800-...-....
Can we get a "-1 Wrong" moderation option?
Just wait till BPL (Broadband Over Powerline) starts crapping on ELT and other government emergency frequencies.
Sigh...