I'm trying to run a cable line to our back house not all that glamorous, it's more of a shed and it's not working. Currently I have a line running from a splitter in our basement, out under the deck, through the house wall, and in to a TV. Total distance from the basement splitter is roughly 40 feet. It gets a slight signal, but it's so slight and only one or two channels that I'm not sure whether it's actually getting a signal or just picking up whatever over-the-air signal it can find.
There's another TV plugged into the basement splitter that gets a good signal, so the problem is somewhere along the line out to the back. There are a few possibilities that I can see: either the cable is damaged possible , or I'm over a max length somehow and the signal is too degraded.
So what's the rough maximum length for a run before signal problems start cropping up? My current thought is to run new wire directly from the cable company splitter at the front of the house, to avoid any issues with the rats' nest of splitters and wires and crap that the current line is attached to.
But this would easily push 75' from end to end, and I don't want to go through all the trouble if it's a useless endeavor. No cable modems are involved, if that helps. Any advice, or other ideas? Length should not be a problem; the signal runs for thousands of feet along the cable company's lines before it gets to you. I'd put good money on the cable going out to your back house or even more likely, the terminating connector on either end being bad. The faint signal you are seeing is probably just the long wire acting as an antenna for OTA signals.
I'd say step one would be to crimp new connections on both ends of the cable. If that doesn't work, then try running a new cable. Make sure your have your TV set to cable. An obvious thing, but sometimes it's a simple problem.
If you have a portable TV that works you can try that to remove the TV as a possible problem. Secondly, is the cable buried at any time? As Coleman asked, what sort of cable is it? Is it rated for outdoor use, buried, conduit? Try using a cable signal amplifier. For a long run like that this just might be your ticket. To get the best results you want to install the amplifier as early in the signal chain as you can. That means hooking it up before as many splitters as poissible.
If you aren't already, try using a good cable before you put a signal amp in the mix. Cable amps, unless you buy really nice ones, can cause as many problems as they solve Every time you split a cable signal, you end up with half the original signal strength.
If you've split the signal times by the time you get your line to the back house, it is completely reasonable for the signal to be too degraded to be useful.
I doubt you are getting OTA signals. More likely you just don't have the signal strength to get a real picture. I'd run from the cable company splitter.
Also, it is fairly easy to damage a coax cable by bending it, so you might have a bad cable as well. I'd vote for damaged cable or improper termination. What kind of termination are you using on the cable? Those crimp-less screw on deals, crimp-on, or compression? Ideally, you would be using direct burial rated RG6 cable for this, preferably quad shield.
Are you using RG59? Compression connectors and the required comression tool are expensive, but make an excellent connection. There are many different types of coaxial cable. Your application will determine which cable has the best characteristics. There are hundreds of cables to choose from to fit every need you have, but here are a few common types. If you are very calculating specific rates of loss or ohms, please see technical specs for each type.
It has an impedance of 75 Ohm and is used in a wide variety of residential and commercial applications including cable television. RG-8 is similar to RG-6, but unable to carry pure video signals. It has an impedance of 50 Ohm and is used in audio control rooms, radio stations or as connections for external radio antennas. It has an impedance of 75 Ohm and provides 3 GHz frequency. They provide greater flexibility, ease of installation and lower cost.
They are used as transmission lines for antennas on missiles, airplanes, ships, satellites and communications. It has an impedance of 50 Ohm, and is great for short antenna feeder runs.
This also has a feature of low PIM. It is used for jumper assemblies in wireless communications Systems and short antenna feeder runs. If you need a cable that requires periodic or repeated flexing, choose this one. It is more flexible that air-dielectric and hardline cables in terms of bending and handling.
It also has an impedance of 50 Ohm. Coaxial cable comes in varying lengths. The shorter and thicker the cable is rated will determine the strength of the signal transmitted. It is important to choose the right cable length and thickness. In radio systems, cable length is comparable to the wavelength of the signals transmitted. You can study the math involved in deciding the best cable length to use.
Characteristics of the cable, such and outside diameter of the inner conductor, inside diameter of the shield, dielectric contact of the insulator and magnetic permeability of the insulator all affect the quality of the wavelength going through your cable. Used in radio, microwave and fiber optic applications, this is the signal strength. The type of coaxial cable used will determine your signal strength and how many dBm your cable can handle. Impedance is the amount of resistance the waves proceeding through the coaxial cable encounters.
The lower the impedance, the more easily the waves flow through the cable. Each type cable has an impedance rating. Factors affecting this is the size of the cable and what materials the cable is constructed from. Standard coax impedances are ohms. This has been tested as a great balance between power handling a low loss. PIM stands for Passive Intermodulation.
When you connect two metals, the result is nonlinear elements and a distortion in the signal may occur. As the signal amplitude goes up, the effects will be more significant. This happens often when connecting antennas, cables and connectors. Connectors are on each end of the cable. They are designed to maintain the integrity of the cable as it passed the signal through to your device.
They are usually plated with high-connectivity metals such tarnish-resistant gold or silver. The type of connector you need depends on what you are connecting to and how far from the source of power to the device. This is a minimal connector interface for coaxial cable with a screw-type coupling mechanism. Applications include microwave systems, handheld radios and mobile telephone antennas.
F-Type Connector - this is a mid-size connector designed for common use. It is the most widely used connector for residential wiring and is used with cable television, satellite television and cable modems.
Connectors are either male or female. Male connectors have threads on the inside of the shell and female connectors have threads on the outside of the shell. Check the plug on your device if it is female, you need a male plug and vice versa. The RG6 cable is a 75 ohm cable with F-Type connectors. The F-Type connector is a mid-size connector designed for common use.
Your Digital cable box and your Cable modem have limits to how low it can go before you start loosing your service. Imagine putting a splitter in a garden hose.
Half the water goes one way The main difference is that a splitter distributes the incoming signal out to each output port and it does so evenly, while a tap will apply different amount of loss to each output port individually, so that when one cable is shorter than another, the output will still be the same.
Use a splitter with as few connections as possible two way splitters will typically have the least signal loss. Try not to daisy chain splitters splitter attached to a splitter.
If you need more ports, a four-way splitter is better than 3 two-way splitters. Begin typing your search term above and press enter to search. Press ESC to cancel. Ben Davis March 27, What is the maximum distance for RG6? What is the maximum distance for coaxial cable? How far can I run Coax for directv? How far can you run coax cable for satellite? Is RG11 better than RG6?
Does the length of a coaxial cable matter?
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