Broadcast signal intrusion

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Broadcast signal intrusion is the hijacking of broadcast signals of radio, television stations, cable television broadcast feeds or satellite signals. Hijacking incidents have involved local TV and radio stations as well as cable and national networks.

Although television, cable and satellite broadcast signal intrusions tend to receive more media coverage, radio station intrusions are more frequent, as many simply rebroadcast a signal received from another radio station. All that is required is an FM transmitter that can overpower the same frequency as the station being rebroadcast. Other methods that have been used in North America to intrude on legal broadcasts include breaking into the transmitter area and splicing audio directly into the feed.[1]

As a cable television operator connects itself in the signal path between individual stations and the system's subscribers, broadcasters have fallen victim to signal tampering on cable systems on multiple occasions.

Confirmed events[edit]

"Vrillon" on Southern Television[edit]

On November 26, 1977, an audio message, purporting to come from outer space, was broadcast during an ITN news bulletin on Southern Television in the UK. The intrusion did not affect the video signal but replaced the programme audio with warnings as to the destiny of the human race and a disaster to affect "your world and the beings on other worlds around you". The IBA confirmed that it was the first time such a transmission had been made. None of the individuals responsible for the intrusion have been identified, although some people believe that the message could have originated from an alien race.[2]

Captain Midnight on HBO[edit]

MacDougall's message as seen by HBO viewers, behind the SMPTE color bars.

At 12:32 a.m. Eastern Time on April 27, 1986, HBO (Home Box Office) had its satellite signal feed from its operations center on Long Island in Hauppauge, New York interrupted by a man calling himself "Captain Midnight". The interruption occurred during a presentation of The Falcon and the Snowman. The intrusion lasted between 4 and 5 minutes and was seen by viewers along the East Coast. The man, who during the interruption also threatened to hijack the signals of Showtime and The Movie Channel, was later caught and identified as John R. MacDougall of Ocala, Florida. He was prosecuted shortly thereafter. Authorities were tipped off by a man from Wisconsin in a phone booth at a rest area off Interstate 75 in Gainesville, Florida. The man filing the report said that he overheard MacDougall bragging about it.

MacDougall's guilt was confirmed by an FCC investigation that showed he was alone at Central Florida Teleport at the time of the incident and a recording of the jamming video showed that the text was created by a character generator at that location. He was charged with transmitting without a radio license in violation of 47 U.S.C. § 301. MacDougall pled guilty and was fined $5,000 and served a year probation. Ambiguity about whether the 47 USC 301 charge was applicable since the transmitter had a license resulted in the passage of 18 U.S.C. § 1367 which made satellite jamming a felony.

MacDougall was able to perform the intrusion while working a second job as a master control operator at a satellite teleport in Florida, where he worked to make ends meet due to declining income from his satellite TV equipment business. He stated that he did it because he was frustrated with HBO's service rates, and that it was hurting his business selling satellite dishes (hence his second job at the teleport). The message, placed over SMPTE color bars, broadcast by MacDougall read:

$12.95/MONTH ?

"Religious" takeover[edit]

Playboy's satellite network was intentionally "jammed" with a text-only message on the night of Sunday, September 6, 1987. The message read, "Thus sayeth the Lord thy God. Remember the Sabbath and keep it holy. Repent for the kingdom of Heaven is at hand." (The verses were taken from Exodus 20:8 and Matthew 4:17 in the Bible.)

The white text and black background of the message prevented viewers from seeing the movie that Playboy was running at the time called Three Daughters. (Playboy's feed was on RCA Satcom 4, transponder 24.)

Thomas Haynie of Virginia Beach, Virginia was convicted of satellite piracy in September 1990 in Norfolk, Virginia federal court in connection with the incident. Haynie was an uplink engineer at the Christian Broadcasting Network, a television ministry in Virginia Beach. He was on duty at the time of the jamming.[3]

According to investigators, it was the religious content of the transmission and the type of equipment used that drew them to CBN. The jamming signal left behind subtle technical clues that were captured on a VHS recording made at Playboy's uplink at the time of the event – like finding "fingerprints" in the video. After investigators were confident that they identified the brand of transmitter and character generator from the video, they concluded that CBN was the culprit.[3] CBN maintained that the FCC's case was entirely circumstantial since there were no witnesses and the signal could not be traced to a point of origin. During the investigation, experts on both sides attempted to recreate the incident with CBN's equipment. According to CBN spokesman Dino McCann they were unsuccessful.[4] Furthermore, CBN asserted that there was not enough power for Haynie to jam Playboy's signal[4] but during the trial, government witnesses said the CBN station was capable of interfering with satellite transmissions.[5]

After initially being deadlocked, the jury eventually sided with the prosecution and convicted Haynie on two of six counts (Haynie was also accused of interfering with the American Exxxtacy channel on GTE Spacenet 1 on the same date; however, a recording of the event was of such poor quality that it was unusable and Haynie was acquitted of the associated charges). Haynie received three years of probation, a $1,000 fine, and 150 hours of community service.[5] Haynie has always maintained his innocence.

Max Headroom incident[edit]

Screen shot of the Max Headroom hijacker.

On November 22, 1987, an unidentified man wearing a Max Headroom mask appeared on the signals of two television stations in Chicago. Independent station WGN-TV, owned by Tribune Broadcasting, was hijacked first. The intrusion occurred during the sports report on its 9:00 p.m. newscast and lasted about 25 seconds. Then came PBS station WTTW, where the man was seen and heard uttering garbled remarks before dropping his trousers, partially exposing his buttocks, and was then spanked with a flyswatter before the screen went black. The next interception occurred at about 11:00 p.m. during an episode of the Doctor Who serial, "Horror of Fang Rock", and lasted almost 90 seconds. None of the individuals responsible for the intrusion have been identified. This incident got the attention of the CBS Evening News the next day and was talked about nationwide. The HBO incident was also mentioned in the same news report.

"Telewizja Solidarność" (TV Solidarity)[edit]

In September 1985, four astronomers at Poland's University of Toruń, Zygmunt Turło, Leszek Zaleski, Piotr Łukaszewski and Jan Hanasz, used a home computer, a synchronizing circuit, and a transmitter to superimpose messages in support of the labor movement Solidarność (Solidarity) over state-run television broadcasts in Toruń, including an episode of 07 zgłoś się. The messages read "Dość podwyżek cen, kłamstw i represji. Solidarność Toruń" ("Enough price increases, lies, and repressions. Solidarity Toruń") and "Bojkot wyborów naszym obowiązkiem." ("It is our duty to boycott the election", referring to the rigged Sejm elections of 1985) with the Solidarity logo.[6] The four men were eventually discovered and were charged with "possession of an unlicensed radio transmitter and publication of materials that could cause public unrest". At their sentencing, the judge noted their prize winning work in the Polish scientific community and gave each of them probation and a fine of the equivalent of US$100 each (or 3,000,000 old złoty, 300 PLN in today's currency).[7]

The era of Soviet pirate broadcasting[edit]

Broadcast signal intrusion was a common practice in the USSR during the 1970s and 1980s due to the absence of and high demand for any non-government broadcasting.[8] As early as 1966, there was a report of an incident in the city of Kaluga where an 18-year-old had broadcast a hoax announcement that nuclear war had broken out with the United States.[9]

In the mid-1970s so many pirates were operating around the city of Arkhangelsk, especially at night, that local people were urged to telephone reports of violators to a special number.[8]

Hijackers using call signs such as "cucumber", "Radio Millimeter", "Green Goat", "Fortune", and others, would overpower the signal on relay stations for wired radio networks in order to transmit their own programming, or transmit into wired radio networks during gaps in normal programming.[8] Even though the incidents appear to have been fairly common according to reports from the BBC,[8] most were not publicly acknowledged for policy reasons. Reports in newspapers typically referred to the hijackers as "radio hooligans broadcasting drivel, rudeness, vulgarity, uncensored expressions, and trashy music".[8] State news organizations also attempted smear campaigns against such pirate broadcasters, claiming that they had interfered with a state frequency used by Aeroflot, "preventing a doctor in an air ambulance from transmitting information about a patient".[8]

2006 Lebanon War[edit]

During the 2006 Lebanon War, Israel overloaded the satellite transmission of Hezbollah's Al Manar TV to broadcast anti-Hezbollah propaganda. One spot showed Hezbollah leader Hassan Nasrallah with crosshairs superimposed on his image followed by three gunshots and a voice saying "Your day is coming" and shots of the Israeli Air Force destroying targets in Lebanon.[10]

"The Winker's Song" incident[edit]

In June and July 2017, Mansfield 103.2 FM, a local radio station in the UK, had its signal intruded at least eight times during outside broadcasts. During these intrusions, "The Winker's Song (Misprint)" was played. The perpetrator has not been identified.[11]

Other incidents[edit]

Television signal intrusions[edit]

On August 19, 1987, during KNBC's 4 p.m. newscast, a gun-wielding intruder identifying himself as "Gary Stollman" got into the NBC Studios in Burbank, California, as a guest of an employee on the set and took David Horowitz hostage live on the air. With the gun pressed on the right side of his back during a news story of "Mail Order Tax". He then picked up a pieces of papers before drawing the weapon again and forces David to read his statement. Horowitz calmly then accepts and reads the gunman's statements on camera; unbeknownst to the gunman, the news feed had been taken off the air replacing by a technical difficulties slide showing a purple background, white text at the top-left mentioning "One Moment Please", the 1986 NBC logo at the bottom-right, and the KNBC logo at the bottom. The unidentified man revealed at the end of his statement that the gun was an empty (pistol-type) BB gun. David finally then reads "there is no way that I can harm anyone with this empty BB gun". Gary quickly set the gun down on the newsdesk, at which point anchorman John Beard quickly confiscated it, forcing one of the workers to pull Gary off the set. It led Horowitz to start a successful campaign to help ban "look-alike" toy guns in several states including California and several others.

On an unknown date in 1989, an advert on TVQ-10 in Brisbane, Australia was interrupted with interference from radio station FM104.[12]

On January 3, 2007 in Australia, during a broadcast of an episode of the Canadian television series Mayday (known in Australia as Air Crash Investigation) on the Seven Network, an audio signal unexpectedly started playing, clearly saying in an American accent, "Jesus Christ, help us all, Lord." This same voice message continued to repeat itself over and over during the show for a total of six minutes. A spokesman for Seven later denied that the transmission was a prank or a security breach and claimed that the repeated line was actually part of the original broadcast and said, "Jesus Christ, one of the Nazarenes", although there is hardly any similarity between the two phrases. Subsequent investigation by independent researchers revealed that the invading transmission was actually from a videotaped news broadcast of a civilian truck being ambushed in Iraq. It remains unknown whether or not this was an intentional act of television piracy or a genuine glitch of some sort.[13][14]

On June 17, 2007, an intrusion incident occurred on Czech Television's Sunday morning programme Panorama, which shows panoramic shots of Prague and various locations across the country, especially mountain resorts. One of the cameras, located in Černý Důl in Krkonoše, had been tampered with on-site and its video stream was replaced with the hackers' own, which contained CGI of a small nuclear explosion in the local landscape, ending in white noise.[15] The broadcast looked authentic enough; the only clue for the viewers was the Web address of the artist group Ztohoven, which had already performed several reality hacking incidents before. Czech Television considered legal action against the group, and tourism workers in the area expressed outrage (since the programme serves to promote tourism in the areas shown).[16]

On July 13, 2007, a grainy photo of a man and woman interrupted Washington, D.C. ABC affiliate WJLA-TV's digital or HD signal. The picture was not transmitted over the analog signal, however. The incident was deemed a genuine signal intrusion by various websites but has since been confirmed to be the result of an older HDTV encoder malfunctioning in the early morning hours and going undetected. Station management stated that the image was from an advertisement for The Oprah Winfrey Show.[17]

Sometime around 2009, Cartoon Network, which is owned by Turner Broadcasting System, had their signal switched with that of Turner Classic Movies, replacing Tom and Jerry with the 1962 film, Ivan's Childhood.

On February 11, 2013, Great Falls, Montana CBS affiliate KRTV had their Emergency Alert System hijacked with an audible message warning viewers that "dead bodies are rising from their graves".[18][19] Later the same night in Marquette, Michigan and the early morning hours in La Crosse, Wisconsin, the same type of hijacking and reference to a "zombie invasion" was made over the EAS systems of CBS affiliate WKBT-DT, ABC affiliate WBUP and PBS member station WNMU during primetime programming.[20][21] Shortly afterwards, PBS affiliate KENW of Portales, New Mexico was struck with a similar hacking incident, repeating similar information regarding zombies;[22] however, this led to the arrest of the hacker of the four television stations.[23]

The Emergency Alert System equipment on Charter Communications in 2014 got their systems hacked by speed and pitch controls. From Ohio to New Hampshire, the Emergency Alert System headers, attention signal, the message audio and EOM tones was used at a slower speed and a deeper pitched. People called it many evil characters from movies after the first video released on July 27th, 2014 involving a Tornado Warning for Lake And Cuyahoga counties in the northeastern part of Ohio outside of Cleveland.[24] Four years later during the 2018 National Periodic Test on two television stations in Houston, Texas, (KHOU, a CBS affiliate and KPRC-TV, an NBC affiliate) were also hit by the deep voice. However the tones that are used in the EAS equipment were normal at the time. The deep voice was hit by a radio station that accidentally got in technical difficulties at the time.[25]

On July 9, 2018, KXAS-TV, an NBC affiliate in Dallas/Fort Worth, Texas replaced 22 minutes of their morning newscast with a mix of national and local commercials with a rotation and repetition. That incident was a mistake to the station.[26]

Cable network feed intrusions[edit]

On May 1, 2007, a Comcast headend replaced the Disney Channel's program Handy Manny with hard-core pornography for viewers in Lincroft, New Jersey. Comcast stated it was conducting an investigation into the event's cause but did not announce findings to the public.[27][28]

On February 1, 2009, another Comcast headend, in Tucson, Arizona, replaced NBC affiliate KVOA's signal with graphic footage from the pornographic video Wild Cherries 5 in portions of Arizona for ten seconds[failed verification (See discussion.)], interrupting Super Bowl XLIII between the Arizona Cardinals and the Pittsburgh Steelers during the fourth quarter. Comcast claimed "Our initial investigation suggests this was an isolated malicious act. We are conducting a thorough investigation to determine who was behind this." KVOA also announced that it will be investigating the incident.[29][30] On February 4, 2011, former Cox Cable employee Frank Tanori Gonzalez was arrested by the FBI and local police in relation to the case.[31]

On April 20, 2012, three minutes of a gay pornographic film was broadcast during a morning news show on CHCH-DT in Hamilton, Ontario, Canada for Shaw cable viewers. The night before, a cable was cut; while it was being fixed on the morning of the incident, the adult programming was spliced into CHCH's feed.[32][33]

Satellite feed intrusions[edit]

On September 7, 2012, the Disney Channel once again was interrupted on the Dish Network, replacing 6 minutes of Lilo & Stitch with a portion of a hardcore pornographic movie. The incident was reported to Dish Network.[34]

On March 11, 2016, private satellite dish owners in Israel watching HaAh HaGadol (an Israel version of Big Brother) on Channel 2 had their viewing of adventures of house-bound reality stars interrupted with incitement from Hamas. The disruption lasted a little over three and a half minutes.[35]

Fictional depictions[edit]


See also[edit]


  1. ^ Kipp, Vicki W. "Tower Industry Part 11 – Tower Harassment". Retrieved 2007-04-25.
  2. ^ "Source of hoax space broadcast stays a mystery". The Times. 28 November 1977. pp. 2, col. E.
  3. ^ a b "940 F.2d 653". Retrieved 27 December 2016.
  4. ^ a b "Trial Set In Jamming Of Playboy Channel". Retrieved 27 December 2016.
  5. ^ a b "Federal Jury Convicts Cbn Technician". Retrieved 27 December 2016.
  6. ^ "(polish)". 2006-05-18. Archived from the original on 2009-12-06. Retrieved 2009-07-15.
  7. ^ "(english)". 1985-09-14. Archived from the original on 2009-03-26. Retrieved 2009-07-15.
  8. ^ a b c d e f "'Lords' and 'Knights' defy Soviet authority, 'pollute' the airwaves". The Christian Science Monitor. January 18, 1984. Retrieved 8 January 2014.
  9. ^ "Soviet 'Pirate Radios' Spark Government Ire". The Milkawaukee Journal. September 29, 1966. Retrieved 23 January 2016.
  10. ^ Friedman, Herbert. "Psychological Operations during the Israel-Lebanon War 2006". Retrieved 2008-08-17.
  11. ^ "Mansfield radio station hit by 'winker' song hijacker". Retrieved 2017-07-17.
  12. ^
  13. ^ "Mystery video audio dynamite". 4 January 2007. Retrieved 27 December 2016.
  14. ^ Was Channel 7 hacked by Jesus? Archived February 6, 2007, at the Wayback Machine
  15. ^ Don82CZ (17 June 2007). "Czech nuclear bomb prank hoax". Retrieved 27 December 2016 – via YouTube.
  16. ^ Wohlmuth, Radek. "Umělci napadli vysílání ČT 2. Podívejte se jak" (in Czech). Retrieved 2007-06-17.
  17. ^ Swann, Phillip. "Washington DC TV Station 'Hijacked' By Mystery Photo (". Archived from the original on 2007-07-16. Retrieved 2007-07-13.
  18. ^ "Montana TV Station's Emergency Alert System Hacked, Warns of Zombie Apocalypse". Archived from the original on 2013-02-13. Retrieved 2012-02-11.
  19. ^ Howerton, Jason (11 February 2013). "Local Station Breaks Into Programming With Emergency Zombie Apocalypse Alert". Mediaite. Retrieved 12 February 2013.
  20. ^ "Emergency Broadcast System hacked". WLUC-TV. 11 February 2013. Archived from the original on 15 February 2013. Retrieved 12 February 2013.
  21. ^ Thompson, Cynthia (11 February 2013). "ABC 10 victim of hackers". WBUP. Retrieved 12 February 2013.
  22. ^ "EAS Zombie Alert Hits More Stations. Finger Pointing Over How it Happened Begins". Retrieved 27 December 2016.
  23. ^
  24. ^
  25. ^
  26. ^
  27. ^ "Disney Channel Horror: Customers Get Porn Instead". 3 May 2007. Archived from the original on 17 September 2007.
  28. ^ "New Jersey Kids See Porn Instead of Cartoons on Disney Channel". 3 May 2007. Archived from the original on 23 February 2015. Retrieved 15 September 2014.
  29. ^ Super Bowl Cut Off By Porn Scene, Sky News, February 3, 2009
  30. ^ Unknown, Unknown (2009-02-02). "Super Bowl porn hits US viewers". BBC News. Retrieved 2009-02-02.
  31. ^ STAR, Kim Smith ARIZONA DAILY. "Man arrested in connection with airing of porn clip during 2009 Super Bowl". Retrieved 27 December 2016.
  32. ^ "Oops! A morning news broadcast to remember". 21 April 2012. Retrieved 27 December 2016 – via The Hamilton Spectator.
  33. ^ Hamilton, Ont., news station broadcasts gay porn
  34. ^ "Kids exposed to porn on N.C. Dish Disney channel". Retrieved 27 December 2016.
  35. ^ "Watch: Hamas hacks into Israeli TV and threatens: 'Terror will never end'". Retrieved 27 December 2016.

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