Why are most of my cable/coax wires disconnected?


Because you only hook up what you have to, to avoid signal loss. If you're serious about getting HD to all your jacks, you should probably look into getting a powered splitter.

Otherwise, you just want a small passive splitter in a good MHz range. Over 2k was bare minimum last time I checked.

I have internet cable and I want it as clean as possible, so I use a good two-way splitter to feed the modem and then it feeds another one I had laying around for the giant jumble of TV feeds.

You probably have one or two incomings at most. Unless someone wired your house up for something strange, this is no different than many people's basements I've seen. Where there is either no equipment yet, or it's just like 4 out of the 16 cables run into a passive splitter (cause those things are cheap and cable guys charge ~$5 a termination on the cable ends, so frankly I'm surprised yours all are. Welcome to your new house? ;).

If you move out, you might take your...

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Last Updated February 17, 2016 01:09 AM

I'm researching an ethernet-over-coax solution for my home. In my closet where all the cabling meet, all but two coax cables are disconnected. There are 14 cables altogether, with 12 cables entirely disconnected, and 2 cables connected to one another with a female/female connector.

If this looks standard, can someone explain basic home coax wiring?

Why are nearly all my coax cables disconnected? Is this related to FCC leakage regulations? Do each of the 12 other cables go to wall plates in the house, or is this really just 6 lines that are simply disconnected at the moment?

Answers 2

My guess would be that each room had coax wires routed to a common panel, and that there are wall plates in each room, or possibly that the wire was left in the wall. Coax cable is cheap, and if your house was recently built, this is a definite possibility.

My other guess is that one of your...

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A collection of coax cable types from Helukabel are able to transmit in the GHz range.

Most everyone knows what coaxial cables are, as they are used in almost every home for cable television connections.

These data cables are also popular in local area networks (LAN) because they are highly resistant to signal interference. This resistance is due to the cable construction, which includes a round copper conductor and then three layers of insulation and shielding which prevents crosstalk from motors, lighting and other sources of EMI. This design also gives coax cables the ability to support longer cable lengths between two devices.

However, coax cables can be difficult to install, so sometimes twisted pair cabling may be called for, in which two conductors are twisted together. This twisting helps to eliminate EMI and crosstalk, especially in the more common unshielded, twisted pair designs. The biggest advantage to twisted pair cabling is in installation, as it...

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Designed for carrying high-frequency signals and protecting them from external-source electromagnetic interference, coaxial cable’s most well-known use is for cable television. Broadband Ethernet applications, home-video equipment, closed-circuit television, ham radio, commercial radio and undersea cable systems use coaxial cable as well.

Often called coax, coaxial cable is an ordinary style of shielded data-transmitting cable consisting of two coaxially oriented conductors separated with dielectric insulation. A metal wire surrounded with nonconductive dielectric insulation serves as the first conductor. Metallic mesh, braid or foil covers the insulation and provides the second conductor. A protective outer covering locks out impurities and moisture as it holds the cable together.

Cable television companies use mainly coaxial cables to transmit television service to customers, and most modern homes usually have one or more outlets for coax cables in every room....

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Coaxial cable carries the same radio-frequency signals that otherwise could go through the air. Channeling the signal through the cable is just a more efficient means of transmission. The cable company's transmitter is similar equipment to a TV or radio station, just with less amplification. For uploading, the modem on your end does the same.

Radio frequency means that the transmitter mixes the signal with a carrier wave, and the receiver extracts the signal using the same carrier wave. Many signals can be carried on different carriers on the same cable, but they need expensive equipment to combine all their customers' signals, and you need a somewhat expensive modem to extract your particular signals from the mix. You wouldn't want to need a cable modem in every internet-connected device.

Ethernet is designed to run for shorter distances, and to connect to simpler, cheaper circuits. Only one data stream can be carried at any moment, and the router divides time on the...

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We have a Charter wiring box on the house but no longer use their service. I am putting up a roof antenna which I assume I can connect its coax to one of the two connectors labeled "IN". The one connector has two connections and a larger ground connector to the ground wire. The other connector has about five female connections; one short wire connects the two IN connectors together.

I have 2 or 3 coax wires that are not being used-spare bedroom, unused connection in family room...should I disconnect them or cap off the female connection on the IN connector, or just leave as is? Just want to minimize the reduction in signal reception, if that makes...

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Coaxial cable is commonly used by cable operators, telephone companies, and internet providers around the world to convey data, video, and voice communications to customers.It has also been used extensively within homes.

It has been around for a long time as a technology (since the early 20th century) and has many singular advantages for reliable, accurate transmission.

It also has limitations that will cause it to be replaced in some cases by fiber optic cable, category cable or, sometimes, by wireless signals.

The key to the coaxial cable's success has been its shielded design, which allows the cable's copper core to transmit data quickly, without succumbing to interference or damage from environment factors.

The three most common cable sizes are RG-6, RG-11 and RG-59:

RG stands for "radio guide." The numbers of the various versions of RG cable refer to the diameter (59 meaning .059, and 6 meaning .06, etc.). They are also called RF cables, which...
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You can only use a pull cord if it was installed when the house was built. You might be able to use the coax to pull ethernet if it was installed later but if it was installed correctly it will be fastened inside the walls.

If you wanted to go say from a unfinished basement to the first floor you might be able to drill up into a wall. Going up 2 stories is going to be a massive undertaking.

The only simple way to do it is like the cable company does their. You drill out the side of the house, run the wire outside and drill though the wall on the second story back in. Most people will not accept wire on the outside of the house.

In any case it is a lot of work and if you pay someone they likely will charge you $500 for a 2 story pull. I would agree with the MoCA...

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This is an interesting question since I've never seen anything that authoritatively states the design decisions behind that choice. Everything that I've come across, whether on the Interwebs or from conversation with people smarter than me in this area, seem to indicate two possibilities:

Future proofing Extra shielding

Future Proofing

By the time of the Cat5 spec we had seen the explosion of data cable runs. Telephone had been using Cat3, or something similar for some time, serial connections had been run throughout University campuses, ThickNet had spidered its way around, ThinNet had started to see significant use in microcomputer labs and in some cases offices. It was obvious that networking computing equipment was the wave of the future. We had also learned the terrible costs of changing out cabling to meet the demands of longer segments or higher speeds. Let's face it, replacing cabling is a nightmarish chore and expensive.

The notion of limiting this...

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Even if your Hi-Def TV is working fine, you might want to check to see that the coaxial cable is “bonded” to the house's grounding system. Bonding simply means connecting two things to ensure electrical continuity and conductivity. In a home, it's important that the electrical system, communication systems, metal plumbing pipes, metal gas piping and other metallic systems be electrically bonded together.

Electrically bonding various systems together limits the different voltage potential (pressure) and shock hazards that could be present during a lightning strike or other electrical anomaly. A difference in voltage potential can create strong currents that can jump between two different systems through an undesirable path, and that path could be you!.

The simplest way to bond your coaxial cable to the rest of the house is to run the cables through a grounding block, and then run a wire from the block to the grounding electrode (ground rod) or other qualifying...

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Just out of interest I was wondering and couldn't work out...

Why are (even high end) speaker cables not coaxial? We always use coaxial cable in the lab to get rid of noise on our measurements.

I figure that 50/75 ohm standard coax would create an impedance mismatch with the typically low ohmic speakers, and output of the audio amplifier. However I calculate that with an outer diameter to inner diameter radius of 1.1, the impedance would be 2.5 Ohms as per below

[itex]Z_0 =\frac{138\Omega}{\epsilon_r}log_{10}(1.1)=2.5 \Omega[/itex]

[itex] \epsilon_r=2.33[/itex] which I think is typical.

This ratio seems feasible to me, to be made into a thin flexible wire.

Come to think of it my guitar cable is coax, and so are some headphones cables.

look forward to hearing your comments on...

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Why Low-Noise Cable

Posted 3 June 2015 12:00 AM by Administrator

Low-Noise Cable Frequently Asked Questions

1. What applications require Low-Noise Cables?

Low-Noise Coaxial and multiconductor cables recommended for small-signal application where shielded cable could experience mechanical shock (twisting, crushing, flexing, pulling, etc.)

Typical applications include:

* Medical Instrumentation – ECG, EEG, Pulse Oximetry

* Microphones

* Test and Measurement

* Sensors

2. What is a Low-Noise Cable?

A Low-Noise Cable is manufactured utilizing specific construction techniques and material selection in addition to conductive dissipative layers in order to reduce electrical noise induced by mechanical stress on the cable.

3. What causes mechanically induced noise?

Typically, when either standard or custom cables...

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I recently moved into a new, bigger home. With that larger amount of space comes issues like dealing with better Wi-Fi coverage. Previously, I used multiple Apple Airport Base Stations to increase my Wi-Fi coverage in wireless extended mode. This means that there was a wireless connection between each Wi-Fi access point. The benefit is that I didn't need to have any wires either within the walls or laying on the edges of my rooms. The drawback is that each access point caused a half reduction in speed for my Wi-Fi-connected devices, regardless of which access point they were connected to.

In order to avoid spotty connectivity in my new home whist attempting to keep my network access speeds as fast as possible, I decided to make certain that each router in my home (one for each floor, for a total of three) had a dedicated and wired connection to my internet gateway.

After some research, I decided to give the Yitong Technology MoCA 2.0 Ethernet to coax adapter a try as...

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