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Transmit another signal using the same carrier frequency to interfere with the original signal...also known as "jamming".
If you have two signals using the same carrier frequency, and you add a second signal source with the same carrier frequency, and an a stronger amplitude (intensity), but different signal data, then it mixes with the original signal at the receiving end, and the original signal cannot be clearly decoded.
What else can I help you with?
What are the function of transmitter?
function of transmitter:-1. generate a signal of desired correct transmitting frequency2. modulation3. power amplification
Can you use 2 transmitter at the same time with the same frequency?
No - they will interfere with each other's signal.
Why is it desirable to have the modulation index of an AM signal as large as possible without overmodulating?
It uses the maximum power available to the transmitter and makes the signal more readable at a greater distance.
Definition of 4-20 mA?
Previously when transmitters were configured for 0-20mA signal it was very difficult to identify an open circuit at 0mA,hence to supersede this defect it was decided to configure the transmitter as 4-20mA signal,so that if there is open signal it can be easily identified.
What is a studio-transmitter link?
A studio-transmitter link (STL) is just that. It is the link between the studio and the transmitter. Let's look at one in action. KWIZ radio is a hip FM station with studios on the top floor of the insurance building downtown. They got a good deal on the space, and they like being downtown 'cause it makes them (and their listeners) feel more connected. Their transmitter is located on top of Mount Fritz, some 20 miles away. The transmitter is up there because real estate is a bit cheaper there, and from that spot it can hit (reach) a lot of territory. And the tower doesn't have to be super tall, either. Besides, there isn't any place downtown to put up an FM broadcast antenna. If the antenna was downtown, it would have to be super tall. And it couldn't get the kind of coverage KWIZ can get with a transmitter located up on a big hill. They want lots of area where their signal can reach out to and arrive at receivers. That translates into lots of listeners and lots of opportunities to sell radio ads and get lots of money for them because the station has lots of coverage/listeners. Dusty Rhodes and Sandy Beach share the mic on the morning show. They draw music from the tracks stored in the memory of the station's music computer. (Who still uses CD's?) When they play a tune, the signal is routed to the input of a microwave transmitter on the roof of the insurance building. The microwave transmitter takes that signal and uses it to modulate the microwave carrier, and then the modulated carrier is sent through amplifiers and finally to a microwave power amplifier. From there, it is sent into a waveguide (or, more probably, a length of heliax cable) and routed to the little microwave dish on that short mast on the roof. The dish is a parabolic reflector, and it may be anything from a foot or two across to half a dozen feet across, depending on the system used and the distance it needs to cover. (A meter in diameter would not be uncommon for something like this.) The microwave signal is then radiated from the feedhorn into the dish. From there it is reflected off the dish and goes where the dish is pointed. The transmitter's dish is pointed at a similar receiver dish up on Mount Fritz. That receiver dish (which is pointed at the transmitter dish) is often mounted on the tower that the FM broadcast antenna sits on. The microwave signal is collected on that second dish and reflected to the focal point to be gathered up by a horn positioned appropriately. There may be a low noise amplifier built right into the horn at the focal point of the receiver's dish. The microwave signal is then demodulated and music track recovered. Then that signal can then be used to modulate the FM transmitter, which is right there. The amplified signal goes out of the FM transmitter and into the transmission line which connects the transmitter to the antenna. The signal is being routed point to point from the studio to the transmitter. And that's the studio-transmitter link (STL) that is common today. AM and FM radio stations and also the TV stations use the links commonly.
Does a discrete signal transmitter and receiver exists?
Yes.
What do you mean by transmitter?
A transmitter is an electronic device which, usually with the aid of an antenna, propagates an electromagnetic signal such as radio, television, or other telecommunications.http://en.wikipedia.org/wiki/Transmitter
Block diagram of microwave communication link?
A microwave communication link typically consists of a transmitter, a receiver, and an antenna at both ends. The transmitter converts the electrical signal into microwave signals, which are then transmitted through the antenna. The receiver at the other end captures these microwave signals through its antenna and converts them back into electrical signals for further processing. The link may also include devices such as amplifiers, filters, and antennas to enhance signal quality and transmission.
What is the function of an RC transmitter?
An RC Transmitter will transmit the signal from your remote to the RC vehicle, allowing you to control it's movements, drive it around within the signal radius and perform tricks.
What are the function of transmitter?
function of transmitter:-1. generate a signal of desired correct transmitting frequency2. modulation3. power amplification
Why power amplifier used in FM transmitter?
Amplifier is used in an FM transmitter to increase the level of a signal suitable for transmission
Am transmitter working principle?
even a single wire can tansmitam signal in which ac signal pass through it
Complete block diagram of monochrome tv transmitter?
yes
Block diagram of monochrome tv transmitter?
A block diagram of monochrome TV transmitter can be written out on paper. The diagram is broke don on drawn blocks and in the blocks is data that is used to explain monochrome TV transmitter.
What is the use of transmitter?
-To capture television signals -To receive the signal from the satellites
What is function of pressure transmitter?
a pressure transmitter is a devise to measure the mechanical pressure and convert in to electrical signal it may be 4~20mA or 0~10V
What is a signal jammer?
A signal jammer or jamming transmitter is a small, low-powered transmitter that interfers with receivers in an area around the jammer. The radius of the area will depend on the power of the jammer. The jammer signal will be "seen" by the receiver and it won't then be able to "see" the little signal of the remotely located transmitter that it is trying to "look at" before you turn on your jammer. The jammer transmits a signal (without modulation - it's just the carrier wave) that radiates from the jammer pretty much in all directions (for an omni-directional antenna - which is what is usually on them). This small signal reaches all receivers within the area of its effective range and "swamps" the receivers in that area. Understand that the transmitters reaching out to receivers are generally "high power" units (their power varying depending on what they're designed to do). The jammer is low power. But because the signal from the transmitter is (almost always) a long, long way away from the receivers in the jammer's area, the signal from the transmitter is very tiny in that area. The jammer, on the other hand, has a "large" signal in that area because it's so close to those receivers. It's the amount of signal that gets to a receiver that is important. If a tiny transmitter (a jammer) is "right on top" of a receiver, it will "hit" that receiver hard compared to the tiny signal getting to that receiver from the (high powered) transmitter many miles away. The general rule for power for a transmitter getting to a receiver is that the signal strength is going to be the inverse sqare of the distance from that transmitter. That means that if you have "x" amount of signal at a given spot from a transmitter and them double your distance from the transmitter, the signal will be 1/d2 or 1/22 or 1/4th the amount you had before. Double the distance again and you're down to 1/16th the original amount of signal. A little transmitter works well to jam a receiver if it's right on top of it. It will "blind" the receiver to the "real" signal from the transmitter it is trying to capture. Jammers are generally a no-no, both ethically and legally. Use your head here and think through your options if you are planning some "experimental" electronics. It is the FCC (the Feds) that get down on individuals who interfere with communications. They play hard ball. Imagine interrupting air-to-ground communications and interfering with air traffic. They'd lock you up and throw away the key. Seriously.
