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The CATV Cable Data Network Explained

CATV cable is a shorthand term for cable television service. The cabling infrastructure that supports cable TV also supports cable internet. Many internet service providers (ISPs) offer customers cable internet service together with television and phone service over the same CATV cable lines.

CATV Cable Infrastructure
Cable providers operate directly or lease network capacity to support customers. CATV cable traffic typically runs over fiber optic cables on the provider’s end and over coaxial cables on the customer’s end.

DOCSIS

Most cable networks support the Data Over Cable Service Interface Specification (DOCSIS). DOCSIS defines how digital signaling over CATV cable lines works.

This article comes from lifewire edit released

Power limited fire alarm cable

Power limited fire alarm cable is mechanically protected for ease of installation in commercial applications, reducing call backs and labor time. Power limited fire alarm cable has a steel armor, is color-coded RED for quick identification. The cable is fully plenum rated for all installations up through 300 volts.

This fire alarm cable is ideal for fire alarms and emergency lighting in low risk applications.

Applications range from CCTV and radio communications to alarm and emergency evacuation circuits.

This article comes from afcweb edit released
Power limited fire alarm cable

What is a Cable Modem Router Combo?

In today’s world of fast-paced internet connectivity, chances are you have already heard about combo cable modems and ADSL (Asymmetrical Digital Subscriber Lines). The combo cable modem is a common feature with most combo cable TV provider nowadays and can provide a high-speed internet connection to their clients.

If you are planning on getting an ISP to set up your home’s internet network, you will most likely encounter two choices: combo cable modems and DSL. In this article, we will solely focus on the combo cable modem router. We will be taking a close inspection as to how a simple coaxial combo cable can deliver not only hundreds of channels to your television but also allow users to gain access to the infinite treasure trove that is the world wide web.

What is Inside the Combo Cable Modem Router?

First off, know that there are two variations of the combo cable modem: the external and internal combo cable modem. In cases that relate to combo cable TV services, chances are they will incorporate a device called a set-top combo cable box. This type of combo cable modem device only requires your standard keyboard and mouse to gain internet access.

Upgraded versions of these devices (from standard combo cable system to digital combo cable) will be able to connect to the internet by default without needing to connect to the CATV. While best combo cable modem routers combos typically come in different shapes and sizes, depending on the ISP, all combo cable modems have the same set of essential components.

This article comes from itbriefcase edit released

Four Advantages of Fiber Optical Cable Communication

Fiber optical cable communications have transformed the telecommunication industry. Over many years of consistent reliability, fiber optics have become the predominant choice for Ethernet backbone infrastructure, high-speed internet services, and general data networking.

Today, fiber optical cable have become increasingly common in small to midsize business networks. The demand for IP-based devices, such as VoIP phones, IP cameras, and video conferencing units, requires an increase in bandwidth to support IP communications. Due to its massive throughput capabilities, fiber optical cable can support bandwidth-intensive devices with no issue.

However, fiber optical cable does come with a cost. Installation is still more expensive than installing traditional copper cabling and many businesses still don’t see a need for fiber in their networks. The following four benefits, however, surely outweigh the costs of installation.

1. Secure Communication:

Fiber optical cable is considered one of the most secure means of communication. The construction of the cabling makes interception of the transmission signaling extremely difficult. Any attempts to penetrate the glass cable will cause “light leakage” which in turn will cause noticeable degradation in communications.

2. Electromagnetic Compatibility:

Fiber optical cable is resistant to many of the outside forces that degrade copper cabling. In areas such as industrial facilities where large motors, controllers, and air conditioners are constantly starting and stopping, fiber optical cable is highly recommended. Electrometric interference and radio-frequency interference (EM/RFI) from the equipment can cause data loss increasing latency on packet streams as they traverse the network.

3. Speed:

Fiber optical cable is many times faster than traditional copper cabling. The small diameter glass fibers can support bandwidth speeds in-excess of 10-gigabit speeds per strand. While copper cabling can support these speeds, it would take multitudes of large diameter category 6 cables aggregated together to reach the speeds of one fiber strand.

4. Distance:

Fiber optical cable is the ideal means for long-distance, point-to-point hardline communications. The 328ft limit on traditional copper cabling restricts long-distance communication requiring the need of additional equipment to extend the signal. Towards the maximum reach of copper cables, attenuation will start to set in causing a slight reduction of speeds on gigabit transmissions. Fiber optical cable are far superior and less expensive for long-distance connectivity with the ability to achieve over 10 gigabytes of speed at over 40 km in length.

This article comes from antaira edit released

Cables: Speaker Cable Design

In this series, we’ve discussed the basics of audio cable design (Part 1 Part 2 Part 3), RCA and XLR interconnect design, and now we look at speaker cables.

These are a very different animal than high input-impedance interconnecting cables. A speaker cable connects to an extremely inconsistent 2 to 32 ohm (or even lower and higher!) reactive load created by the speaker. RCA and XLR interconnect cables see a much more consistent and resistive load, making their electrical measurements far easier to predict.

While speaker cable also suffers from the non-linearity of the velocity of propagation in the audio band, it has an additional challenge. It has to be lower in impedance to better match the speaker load, but when the velocity of propagation is going down, this naturally increases the cable’s impedance.

This article comes from psaudio edit released

SPEAKER CABLES – WHAT YOU NEED TO KNOW

What is speaker cable?

Speaker cable is the wire used for the electrical connections between speakers and amplifier sources. It has three key electrical properties: resistance, capacitance and inductance. Resistance is by far the most important property to look at. Low-resistance wire allows more of the source’s power through to the speaker coil, meaning more power and more sound. Simple enough.

Wire material

Copper is the most widely used material for speaker cable due to its low cost and low resistance. However, copper does oxidise so it needs to be well covered and insulated. When exposed to air, pure copper reacts to creating copper oxide which covers the exposed surface; this creates a barrier between the cable and the speaker/ amplifier therefore can weaken connections. Silver is slightly less resistive than copper meaning a thinner gauge will still offer a lower resistance, however as you might have guessed silver is expensive so a thicker copper wire will actually still be cheaper to buy. Gold however does not oxidise so it can be used for open terminations but as it has a higher resistivity to copper or silver it is rarely used as speaker cable. As with all metals, the purer the wire used, the higher the cost (per metre). Many different levels of purity are available for cables, and whether or not this brings a significant benefit to the audio is down to personal preference and for you to decide for yourself.

This article comes from cambridgeaudio edit released

Fire detection and fire alarm systems for buildings according

Alarm cable is designed to meet the comprehensive British Standard detailing a code of practice for the design, commissioning, installation and maintenance of fire detection and fire alarm cable systems in non-domestic buildings. These range from single manual call points to complex networked systems with numerous automatic fire detection and communicating control panels.

The Standard covers the operation of fire protection systems such as smoke control, emergency lighting, automatic door release, fire alarm cable systems, voice alarm cable systems, fire extinguishing systems, and any associated safety measures such as elevator grounding, valve closing, or air handling shutdowns.

We supply a comprehensive range of fire performance cables (also known as fire survival cables and fire alarm cable) manufactured to meet the requirements of fire performance cables as determined by BS5839-1, including BASEC-approved and LPCB-approved cables.

This article comes from elandcables edit released

Temperature/Humidity Sensor Combo Cable

A leading manufacturer of I/O products for industrial automation, data collection, and monitoring needed a custom combo cable for a yet-to-be-announced digital temperature and humidity sensor.

Requirements:

The combo cable needed to maintain flexibility in cold temperature applications. The combo cable jacket needed to be oversized to fit the collet of the customer’s sensor housing.

The Multi/Combo Cable Solution:

Multi/Combo Cable built a PVC insulated three conductor 24(7) AWG combo cable core with an oversized black TPE jacket.

TPE or Thermoplastic Elastomer is a combination of plastic and rubber. Thermoplastic rubber has mechanical characteristics of thermoset rubbers yet is a thermoplastic. It has excellent ozone and chemical resistance, excellent electrical properties and low water absorption. It also does well with temperature extremes (-46°C to 125°C).

Our customer was grateful that we were able to meet their needs without special tooling or additional fees.

Advantages Of Nylon Braided Usb Data Cables

Nowadays, there are many styles of mobile phone usb data cables on the market, such as nylon braided usb data cables, PVC usb data cables, TPE usb data cables, and TPU usb data cables. Today, we mainly analyze the nylon braided usb data cables, so what are the advantages of nylon braided usb data cables:

1. beautiful appearance: nylon braided data cable can change color, texture, add other colors on the body, while other styles of usb data cables are single color, can not add other colors on the body.

2. feel good: because the nylon material itself is very soft, feel very comfortable. Moreover, the nylon filament is very thin, so it is necessary to wrap a lot of nylon filaments together, and then according to the required process, it is determined how many sets of nylon filaments wrap the entire data cable. Due to the particularity of the process, the nylon braided data cable Feel very comfortable to touch, look very stereoscopic.

3. increase the tension of the data cable: Just mentioned that the top of the line is composed of a lot of tiny nylon wire, so the nylon data cable can withstand the good pull.

4. not easy to damage: the original data cable used by many of the wire tails are easy to damage the copper wire inside the leakage wire, and the nylon braided data cable just solved this problem.

This article comes from focusestech edit released

Coaxial Cables and Applications

Coaxial cables are used to transmit electrical energy, or signals, from one location to another, and to connect a source to a load, such as a transmitter to an antenna. This white paper studies their construction and applications.

Agency requirements for compliance with National Electric Code are specified with a table listing corresponding applications for various cable listings. The electrical properties of coaxial cables including characteristic impedance, capacitance, velocity of propagation, and attenuation are detailed and an account of physical properties, namely, dimensions, temperature rating, bend and flex radii, and pulling tension are described.

Applications for various types of coaxial cables such as video distribution, RF and microwave transmission, wireless and antenna functions, and instrumentation/control are specified in detail.

This article comes from thomasnet edit released