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Cable Television
A cable television is a system that distributes television signals by means of fiber-optic or coaxial cables. Cable television systems started in the United States in the late 1940s to enhance reception in hilly and remote areas, where broadcast signals were weak.
3,389 Questions
What are the importance of impedance matching in amplifiers?
Two reasons.
1...When impedance of source and destination match, power transfer is maximum.
2...If a long transmission line is involved, the characteristic impedance of the line must match the destination impedance, or reflections will occur on the line.
What is the difference between analog and digital representation?
Digital signals are now replacing analog for television transmission worldwide. Digital signals use a stream of digital data (2 differing signal levels to carry binary data) instead of a continuously variable signal level. The biggest difference is that digital data is more resistance to corruption than its analog equivalent. It is this characteristic that means we see a clean signal rather than one with noise in the image as is the case with a poor analog signal.
Digital signals can also be compacted using a technique called data compression. Compression allows signals to take far less bandwidth than they would otherwise need and so more channels can be carried in a given bandwidth. This compression allows HD signals to be broadcast. Broadcasting of HD analog signals would prove challenging.
It is important to understand that digital does in itself not mean higher resolution. Digital SD signals are exactly the same resolution as their analog equivalent. The comparison cannot be made with HD as HD transmission is always digital.
Digital transmission also allows a variety of additional data to be carried within the same signal. Surround sound is one of the more common benefits of auxiliary data.
answ2. An RF transmitter generates radio frequency waves in its circuits, and to this 'carrier signal', it adds the information part by modulating the carrier signal. This composite signal (carrier plus information) is then fed to an antenna (aerial).
The aerial induces a corresponding signal into the atmosphere, by altering the Electric and Magnetic fields at (obviously) the same frequency.
The impedance of 'free space' is few tens of Ohms to a few hundreds of Ohms.
[Impedance may be considered analogous to resistance, but with reactive properties as well.]
The power emitted by the transmitter can vary from a megawatt or so (for VLF signals) to a few watts for handheld devices.
An Rf receiver receives the signal from the atmosphere, from its own aerial.
The receiver aerial is often quite simple, and the signal level is typically of a few microvolts.
This it tunes in (gets rid of unwanted signals and amplifies only the wanted ones).
The receiver circuits then strip the information part of the signal from the carrier part, and amplify this to a useful level for audio or video.
The actual signal into the loudspeaker will be a few tens of volts. In spite of the inefficiency of loudspeakers, (often only a few %) the signal eventually appears at a level that may be heard. A background radio will be a few milliwatts of power.
Even a very loud sound is only a few watts of radiated (sound) energy!!
Converts digital signals into analog signals for transmission over phone lines?
Oddly enough, it's called an A to D Converter and has many sources to obtain, including build it yourself plans or online auctions. There is also D to A converters so please be sure you pick the correct converter.
Analog signal vs digital signal?
A: Analogue is a signal DC with varying amplitudes. Digital is a state defined as true or false or machine language '1' '0' Digital must change states to supply information while analogue it has only to change amplitude
Why analog signal convert into digital signal?
Because an analog signal takes up more bandwidth than the new digital format. By cutting off the analog signals and offering digital only, it frees up enough space on the network to offer services to a wider range of people. It also includes enhancements to the providers network. For example, faster internet speeds, more TV channels, and more features.
What is the difference between baseband coaxial cable and broadband coaxial cable?
Iam pretty sure that baseband coax was 50 ohm and was used for networking computer, were broadband coax is 75 ohm and used in the cable tv industry.
A baseband signal is the original signal before it is modulated onto a carrier, mulitplexed or mixed.
A broadband signal contains many channels which have been modulated or multiplexed onto a common carrier.
The significant difference is the bandwidth of each.
The impedance of the cable which carries either of them is totally irrelevant to the definition.
Why is splicing of optical fibers done?
Splicing of optical fiber cable is done to extend a cable, making it longer, or to repair a break in it. Splicing is preferred over installation of connectors, because the connectors introduce losses and degrade reliability. Some connectors are necessary, but those are placed in a protected environment, and their use is minimized. Besides, a typical cable, with 56 or more strands, would require 56 or more connectors, and that would create a large lump in the cable.
What are the types of analog signal?
An Analog Signal is a continuous signal, just like an electric current that flows through the copper cables when your electrical appliances are turned on. This continuous signal represents physical measurements. An example of this would be with an analog audio signal, the voltage amount of the signal changes continuously with the change in sound waves. Analog Signals are normally represented as electrical signals, but there is also Classical Mechanics, Pneumatics, and Hydraulics technique's that can be used in analog signals.
What channels are offered with rcn cable?
"RCN cable is part of Comcast. It offers the same cable channels as comcast, mediacom, or any other cable station. This usually includes basic, extended, and digital cable and the premium networks plus HD."
Can you splice buffer tube fiber optic to ribbon fiber optic?
American Cable Assemblies, Inc. provides high quality products for fiber optic connectivity, copper connectivity, power cords, network solutions, panels, enclosures and racks, etc. Visit americancableassemblies. com for more details.
americancableassemblies. com/panels-enclosures-and-racks/fiber-splice-trays/
Do newer televisions need dish or cable?
No, newer TVs do not need dish or cable, at least not in the US. There may be instances where someone living in a remote locale cannot get any "regular" broadcasts from stations in the area, but most people live in a place where TV signals are still broadcast in a "conventional" way from a local station. There is an issue in that the new regulations have allowed broadcasters to go to a "digital" format, and you'll need a converter if your "newer" TV isn't capable of handling that new TV modulation scheme.
Dish or cable is an option for TV viewers, and the issue centers on whether an individual wants to watch one or a few local broadcasts for free, or wants to watch a whole stream of broadcasting that is only available from a provider who carries all those signals for a price. That's what dish and cable are all about; they offer large numbers of stations and different packages or "groups" of signals to appeal to the family, the sports enthusiast, or the film aficionado. The more you want to watch, the more it costs to get those signals.
What channel is the outdoor channel on rogers?
The Outdoor Channel is typically found on channel 256 on Rogers cable. However, channel numbers can vary by location and service package, so it's best to check your local channel lineup or the Rogers website for the most accurate information.
Wavelength is the distance between corresponding (identical) phase points of a wave, the period over which a wave or signal repeats.
In electricity, it is the amplitude of a sine wave plotted over time.
aa,b7,d1,d9,ce,8e,83,af. a1,38,06,29,24,29,8d,2b,...from davy
Did jack and todd Hoffman make a million dollars?
Jack and Todd Hoffman, of the reality show Gold Rush America are still looking for gold, so if they have made a million dollars, it isn't from that.
How much does charla rines of shopnbc earn annually?
Charla Rines, a professional fashion buyer since 1975 and fashion expert still, has been an on-air host for a number of years. She was recently a popular host on the ShopNBC home shopping channel, based in Minneapolis, Minnesota. She was said to have been making a base salary of about $400,000.00 and some reports state that her relationship with ShopNBC was terminated in recent years as they were not willing to increase her base salary. She is an extremely personable host, one that many traditional home shopping enthusiasts can relate to. Her personality was spirited and her laugh was contagious. No matter where Charla Rines decides to land her new position, whether it be in Australia or here in the United States, many of her fans will most likely join her there. In the home shopping business, a great host is often one that people at home enjoy sharing the day with. Perhaps ShopNBC was under financial pressure, resulting from the down economy, and couldn't meet the requests of this tenured sales personality?
Others who host on QVC, HSN and other Networks often make a base salary and then are offered significant incentives. Often, the incentives are very significant and based on sales. Not unlike sales positions outside the television and cable air arena, salesperson's who produce are rewarded with bonuses and increased salaries. It's not uncommon for many of the popular daytime hosts to earn over $1,000,000.00, but the range of salaries is quite varied and depends on many factors. A new host, unproven and "green", might be working late nights and selling unfamiliar items. Brand new hosts can begin at a similar salary as many traditional sales positions, from $40,000.00 and benefits on up.
Recent research has found Charla Rines hosting for WorldofWatches.com. When she was with ShopNBC, Charla would often host or co-host the many impressive watch shows that ShopNBC was especially recognized in the industry for. Another ShopNBC watch host, Jim Skelton, is also with World of Watches and can be seen on DirectTV and other broadcasting outlets as well as on their live website too. I'm sure that Charla Rines will bring her vast knowledge and vibrant personality to her new endeavors.
Peter Cannice
pasta345@gmail.com
Universal remote codes for govideo?
0407 0426 0455 0971
137, 151, 163
Here is some combo codes I found
Does a repeater reduce the effects of attenuation for a digital transmission signal?
It depends on the repeater. Those that receive a signal, buffer it in real time and pass it on as a digital signal will reduce the effects of attenuation. Those that receive a signal and regenerate it with a new clock signal will generally eliminate the effects of attenuation completely.
The type of repeater used depends on where and how it is used as well as the signal that is being transmitted.
What is the insertion loss of RG 6 cable?
The insertion loss of the RG 6 cable can be computed based on the parameters provided.
How can you transfer video recording of Tata Sky into computer?
Not the direct way! Most of the set top/hub station boxes don't allow copying of recorded programs to DVD or PC.
You can connect a TV tuner card on PC to the set top box, play the program to your PC and can use the recorder software attached to the TV tuner to record it to PC/HDD.
Source(s):ExperienceWho are the board members of CNN?
As of my last update in October 2023, CNN is a division of Warner Bros. Discovery, and its board members would primarily be those of the parent company. Key board members typically include executives and leaders from Warner Bros. Discovery, but specific individuals and their roles can change frequently. For the most current list of board members, it's best to refer to Warner Bros. Discovery's official website or recent press releases.
