The 7 Best Cable Amplifiers
- includes an ac power adapter
- compact for ease of installation
- prone to burning out over time
|Rating||4.3 / 5.0|
- integrated power cable
- can replace the need for a splitter
- very sensitive to electrical noise
|Brand||AmerTac - Zenith|
|Rating||4.1 / 5.0|
- increases channel reception
- led power indicator
- does not work for all cable setups
|Rating||4.3 / 5.0|
- provides up to a 25 db gain
- very low distortion
- gets quite warm while in use
|Rating||4.4 / 5.0|
- ports are gold plated copper
- conforms to international standards
- can be easily wall or panel-mounted
|Rating||4.6 / 5.0|
- meets ieee surge safety standards
- die-cast aluminum housing
- can help stabilize internet signals
|Rating||4.8 / 5.0|
- reduces cable pixelation
- corrosion-resistant housing
- comes with 5-year warranty
|Rating||4.5 / 5.0|
Clearing Up The Signal
Imagine that you're planning a gigantic Super Bowl party in your home. You've got each room equipped with its own large flat screen television connected to a cable box that will pick up the signal and display the game on each TV. In preparation for the party, you notice ghosting, picture degradation, and other static problems on at least two or three of your televisions throughout the house. To improve that signal quality in time for the big game, you're going to need a handy cable amplifier to fix those visual anomalies. I like to think of a cable amplifier functioning as a team of relay racers. When the first athlete completes his portion of the race (and essentially runs out of steam), he passes the baton off to the next racer who continues on without any loss of endurance as a result of the first racer getting tired.
While an amplifier is not a relay racer, it is responsible for boosting a cable signal at various points throughout the house to prevent its degradation. When the signal first enters the home, it starts out quite strong and will reach a couple of televisions without any issues. However, as this signal is distributed more widely throughout the home, it gets split into many different directions, making it weaker each time such a split occurs. This splitting action is responsible for that football player looking fuzzy on the big screen when an amplifier is not in use.
The four basic types of cable amplifier that you can leverage as a solution to this problem include the forward gain, return gain, 2-way active-return, and bypass amplifiers.
A forward gain amplifier compensates for low signal strength from a cable provider before a splitter is connected. It delivers increased signal strength to a consumer's home on the upstream frequency band of 54 to 1,000 MHz, while allowing a frequency range of five to 42 MHz to be passed back to the corresponding cable company on the return band. When we discuss upstream band, we're referring to the range of incoming signals that such an amplifier can handle. By contrast, the return band refers to a special frequency range used by a cable company to transmit signals from a user's cable box back to the cable provider itself. An example of this type of signal includes the command from a remote control to order a pay-per-view movie through a cable box menu interface. The remote acts as a communication device for the box, while the box sends a signal back to the cable provider to turn on the selected pay-per-view event for the viewer.
The return gain amplifier is dedicated to improving the quality of the return band signal coming from a device like a digital video recorder. Without it, previously-installed splitters could compromise the DVR's performance. This type of amplifier is also beneficial in situations involving lengthy cable runs requiring greater travel distances to reach their destinations. Return gain amplifiers correct weak signals on the return path to a service provider to maintain one's high-speed internet, interactive television, or telephone service.
Two-way active-return amplifiers compensate for weak signals in both the incoming and outgoing directions, making them useful in situations where there is substantial signal loss from multi-way splitters and long cable runs.
Bypass amplifiers work in the same way as forward gain devices with the addition of a relay switch that allows a return path signal to circumvent the amplifier circuitry in the event of a power outage. This means that a user's telephone, television, and cable internet devices can continue to communicate with the service provider even if the power goes out.
Staying Informed Without Being Overwhelmed
Several factors come in to play when determining the best cable amplifier to use. The awareness of the types of broadband services coming into your home will help you make a choice. Many consumers utilize a single service provider to deliver internet, telephone, and television services using a single cable modem. As an example, I have both my cable and internet services delivered to my home through Comcast. Think of your cable provider as a useful resource. If you have a technician coming to your home to install these services for you, they can usually recommend the best type of amplifier to use based on your home's specific layout. To do this, they'll look around, see how many televisions you own and in which rooms they're located, what types of splitters are involved, and how long your main cable line is.
For example, if you have a large, multi-floored home with several rooms equipped with televisions, DVRs, and interactive cable boxes, then a two-way active return amplifier can be a wise choice. This will help to amplify signals in both the forward and return directions if your home makes use of large splitters.
Ensuring that your chosen amplifier can accommodate high-definition signals is another big consideration, especially when you want to catch every moment of that in-game action.
A Brief History Of Cable Amplifiers
Amplifier technology stems from the overall growth of the cable industry itself, which has its roots in the development of the broadcasting industry and the United States National Television System Committee signal as far back as 1946.
The earliest cable systems consisted of only 12 channels and leveraged tower-mounted antennas with preamplifiers connected to both flexible coaxial cables and vacuum tube amplifiers. Because so little signal processing took place at this time, early television set receivers were simply tuned to those channels provided by the coaxial cables. Early vacuum tube amplifiers owe their significance to American inventor Lee De Forest, who used them to boost the amplitude of radio waves in 1907. This development improved the clarity and volume of the human voice, music, and broadcast signals, making the vacuum tube amplifier a key component for most radio, telephone, television, computer systems, and radar before the invention of the transistor in 1947.
In 1948, Milton Jerrold Shapp invented a new system using a master antenna to deliver a signal to all TVs in a Philadelphia department store. That same year, he formed the Jerrold company to market and support his hardware. This master antenna television system combined the functions of both coaxial cable and self-made vacuum tube amplifiers carrying many high-fidelity signals at once. At the same time, John and Margaret Walson installed the first cable TV system in Mahanoy City, Pennsylvania to coincide with the sale of newly-introduced General Electric televisions. They later formed Service Electric Cable TV Incorporated in 1948, which still operates today as Service Electric Cablevision.
By the 1960s, the semiconductor began to replace earlier vacuum tube technology in favor of solid state, transistor-based cable TV amplifiers. This trend continued through the late 1970s and provided several benefits, including low-input voltages for extra safety, more compact designs for amplifiers, and reduced costs for the technology.
Through the beginning of the 21st century and into today's cable market, there has been a consistent focus on the development of amplifiers that handle longer cable lines, resulting in low distortion with minimal noise to a viewer's high-definition television.