Jammers therefore can be much less powerful than their jammed radars and still effectively mask targets along the line of sight from the jammer to the radar ( mainlobe jamming ).

Sidelobe jamming can be overcome by reducing receiving sidelobes in the radar antenna design and by using an omnidirectional antenna to detect and disregard non-mainlobe signals.

It is compact, jamming when tightened and the working ends can be cropped very close to the knot.

If jamming is used continually, it can be extremely difficult for a missile to acquire the target, locking on to the much larger return from the jammer, with the operator unlikely noticing the difference without a radar screen to see the return.

However, any missile that has a back up tracking system can defeat jamming.

Stressed environment: In radio communications, an environment that is under the influence of extrinsic factors that degrade communications integrity, such as when ( a ) the benign communications medium is disturbed by natural or man-made events ( such as an intentional nuclear burst ), ( b ) the received signal is degraded by natural or man-made interference ( such as jamming signals or co-channel interference ), ( c ) an interfering signal can reconfigure the network, and / or ( d ) an adversary threatens successful communications, in which case radio signals may be encrypted in order to deny the adversary an intelligible message, traffic flow information, network information, or automatic link establishment ( ALE ) control information.

For printers several years old, it is common for the dried ink in the spittoon to form a pile that can stack up and touch the printheads, jamming the printer.

When an aircraft and a ground station are aligned with the Sun, jamming of air-control radio frequencies can occur.

A subvertisement can also be referred to as a meme hack and can be a part of social hacking or culture jamming.

In the case of derailleur gears the chain is usually long enough so that it can be shifted onto the largest front chain ring and the largest rear sprocket without jamming, and not so long that, when shifted onto the smallest front chain ring and the smallest rear sprocket, the rear derailleur cannot take up all the slack.

Longitudinal error ( error arising from effects in the long direction of the tape ) can be caused by variations in the rotational rate of the capstan drive, stretching of the tape medium, and jamming of tape in the machine.

Many casinos have eliminated the use of metal tokens ( and coins ), in their slot machines, in favor of paper receipts or pre-paid cards, which, while requiring heavy infrastructure costs to install, eliminate the coin handling expenses, jamming problems encountered in machines which took coins or tokens and can allow more game-specific technology in the space of a machine which would usually be dedicated to coin mechanisms.

When jamming the receiver a cornerback must keep his body squared with his feet shoulder width apart, so he can have power when jamming his arms out.

Some special abilities include carpet bombing, jamming mini-map, laying mines, shooting nukes, protecting from nukes, paralyzing abilities and limited shields can also contribute to the outcome of the battle.

While the knot can become jammed in some modern materials, it is usually easily untied after moderate loads ; it can be made more resistant to jamming by taking an extra turn around the object -- this will make for a 1-diameter longer span of the end to reach around the standing part to be tucked ( although in a case of tying to a small shackle or link of a chain, this might not be possible ).

One problem with the design of the snow blower is that snow can build up in the auger, jamming it and stalling the motor.

The jamming thus described can be unjammed by mechanical means, such as tapping or shaking the container, or poking it with a stick.

In fact, AESAs can then be switched to a receive-only mode, and use these powerful jamming signals instead to track its source, something that required a separate receiver in older platforms.

Besides using traditional mediums like film and music to raise awareness or push for change, an artivist can also be involved in culture jamming, subvertising, street art, spoken word, protesting and activism.

EMI can be intentionally used for radio jamming, as in some forms of electronic warfare, or can occur unintentionally, as a result of spurious emissions for example through intermodulation products, and the like.

They maintain a channel to prevent ice jamming, and more generally improve navigation and control over lateral erosion, that would form from meanders.

In 1987 after decades of generally refusing to acknowledge that such jamming was even taking place the Soviets finally stopped jamming western broadcasts with the exception of RFE / RL which continued to be jammed for several months into 1988.

While western governments may have occasionally considered jamming broadcasts from Eastern Bloc stations, it was generally accepted that doing so would be a pointless exercise.

The government has generally denied any involvement in jamming and claimed they are sent from unknown sources.

It is distinct from culture jamming insofar as it generally lacks idealistic motives, although the results are often of a comparable type.

Almost all keyboards have only the switch at each intersection, which causes " ghost keys " and " key jamming " when multiple keys are pressed ( see rollover ).

Jamming is problematic to radar since the jamming signal only needs to travel one way ( from the jammer to the radar receiver ) whereas the radar echoes travel two ways ( radar-target-radar ) and are therefore significantly reduced in power by the time they return to the radar receiver.

By itself, frequency hopping provides only limited protection against eavesdropping and jamming.

With only a finite number of jamming transmitters available at any given time, it may be more efficient to block clandestine stations intended for a large audience rather than a message intended for a single person.

He was only allowed to film in the store at night while it was closed ( from 10: 30 p. m. to 5: 30 a. m .), hence the running gag of someone jamming gum in the padlocks and the steel shutters remaining closed ; otherwise, it would seem odd that it was dark outside during all the daytime scenes.

The palace continued as the BBC's main TV transmitting centre for London until 1956, interrupted only by World War II, when the transmitter found an alternative use jamming German bombers ' navigation systems ( it is said that only 25 % of London raids were effective because of these transmissions ).

When the NYC subway still used tokens, token suckers would steal tokens by jamming turnstile coin slots, waiting for unsuspecting passengers to deposit tokens ( only to discover that the turnstile did not work ), then returning to suck out the token.

The radio station Voice of America and the BBC ( British Broadcasting Corporation ) also had some audiences in Czechoslovakia, and their broadcasts were subject to only occasional jamming.

This would not only extend the range of the system eastward, but also allow stations to move and suddenly appear elsewhere if jamming became an issue.

The discipline of neuroethology has also discovered and explained the only vertebrate behavior for which the entire neural circuit has been described: the electric fish jamming avoidance response.

Low magazine capacity, frequent jamming and the complicated barrel-change made firing and reloading a slow and laborious process, resulting in the Breda 30 being a weapon only capable of laying down a diminutive amount of firepower and making it a very modest contributor to a firefight.

Conventional radars, consisting of a rotating transmitter and sensor, have limited power, are vulnerable to enemy jamming and perform only one function-with separate units therefore required for surveillance, tracking and targeting.

By late 1943, the Luftwaffe was starting to deploy the greatly improved FuG 220 Lichtenstein SN-2, operating on a longer-wavelength of 90 MHz ( lower end of the US VHF FM broadcast band ) frequency which was far less affected by electronic jamming, but this required the much larger Hirschgeweih ( stag's antlers ) antennas, with only eight dipole elements, looking like a much-enlarged version of what occupied the forward end of each one of the earlier quadruple Matratze masts.

They were tolerated by the government which only occasionally raided them in an effort to show compliance with Irish law, although the national broadcaster, RTÉ, took a harsher approach, including radio jamming.

Pirate radio had a very noticeable impact on both listener figures and the advertising revenue of RTÉ, which could resort only to frequency jamming of the Nova and Sunshine MW & FM transmitters to try to reduce listenership.

He worked as a songwriter and performer in 1973 in a group called The New Cactus Band with Duane Hitchings ( an original member of Buddy Miles Express, who was also recorded jamming with Hendrix ( but quite sporadcally, over at least two years ), although, ( unlike Robinson ) he was edited out of the only official release of his jams by Alan Douglas, and this " fame " has to rely on the untampered, bootlegs of the original recordings ), the sole member from the final lineup of the Cactus band, which had disbanded in 1972.

" After their little luck freaking out ordinary people, they return to the barn, only to find that it is flooded with Seth and Munchie's juice and broken bottles — revealed to be caused by Homer's frisbee ending up inside the " juicillator " machine, jamming it and thus ruining Seth and Munchie's shipment.

Gee-H entered service in October 1943 and first used successfully in November against the Mannesmann steel works at Düsseldorf on the night of 1 / 2 November when about half of the sets failed leaving only 15 aircraft to bomb the factory on Gee-H. Gee-H remained in use throughout the war, although it was subject to considerable jamming from the Germans.

The jamming usually only took place during programming in languages widely spoken in Eastern Bloc countries ( e. g., Russian, Polish, Czech, Lithuanian, etc .).

Groundwave jamming was more effective but only over a small area and was thus only used in / near major cities throughout the Eastern bloc.

* Thales jamming technology only operates at power levels below 500 kW ( for its shortwave jamming products ).