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  • A Guided Tour on HDMI Cables, Their Types, and Functionalities

    Walk into any home and you will find long, black cables that enable the audio and video devices to interact with each other. Known as High Definition Multimedia Interface – HDMI; these incredibly powerful electronic cables take your home/office visual experience to a whole another level. Since its arrival, it has replaced five outdated cables. Search for “best HDMI cable” on the internet and you will find many to choose from.

    We understand that buying the right high speed HDMI cable to suit your needs can be overwhelming. But, if you buy it from a trustworthy online resource, it should not be very difficult. SF Cable, your electronic companion is here to help you get over your HDMI shopping bewilderment. So, let us untangle different types of HDMI cables, their types, and functionalities for you.

    1. HDMI Male/Male Cables

    How would you define a visual experience that is a marvel? Perhaps, the one that makes you glee every few seconds. The one that enhances important details and makes them more visible than ever! An HDMI male/male cable enables you to connect your latest Laptop, game console, DVD Blu Ray players to your HDTV projector or monitor. These HDMI cord gives an incredible 4k resolution and helps you replace HDMI cables that offer 720p/1080i. Visit SF Cables website and you will find M/M cables of different lengths that serve different functionalities.

    2. HDMI DVI Cables

    The abbreviation DVI stands for – Digital Visual Interface. When you want to convert the DVI output on your computer to your TV, HDMI to DVI-D cables come of great help. However, some of these cables might not be able to support the audio when you convert DVI to HDMI. So, before you buy one for your needs, it is better to check with your providers. Also, you must ensure that all these cables are eco-friendly and RoHS compliant. Check out HDMI DVI cables/adapters of different types and length on our website. Most of these are ready to ship and come with a money back guarantee.

    3. Panel Mount HDMI Cables

    The plug in and plug out irregularities, stamping on cables and other damages can make your systems inoperable. Hence, it becomes very important to protect the wear and tear of HDMI ports. This is when Panel Mount HDMI Cables come of help. You can utilize them as extension cables and they are compatible with different HDMI peripherals. As these ports have a double shielding, you will never cringe at the possibilities of signal loss. After all, an uninterrupted and ultimate visual experience is what you need. Get in touch with us to find HDMI cables having a hi-speed ethernet.

    4. Micro HDMI Type D Cables

    If you want a portable HDMI Lead that can connect two devices with an HDMI output, Micro HDMI Type D cables can be of good help. They seamlessly work with your laptops, mobile phones, and cameras. You can avail these cables in different lengths for different purposes from SF Cable. We also provide HDMI Male to Micro RedMere slim cables. 1.5ft HDMI To Micro HDMI Cable, 3ft HDMI to Micro HDMI Cable, 6ft HDMI to Micro HDMI Cable and 10ft HDMI to Micro HDMI Cable are some of our bestsellers. You can read about the features and functionalities of these cables on our website.

    5. Mini HDMI Type C Cables

    Thanks to the Mini HDMI Type C Cables, you can bid goodbye to the lengthy and space occupying cables. These cables are perfect for small devices like laptops, cameras, camcorders, and you can carry them along wherever you go. When it comes to compatibility with HDMI, these cables will never create problems. It is just that they come with a connector of different size. Whether you want to buy high speed HDMI- male/mini-male cable with Ethernet or HDMI male to mini RedMere slim cables of various lengths you can buy them at SF Cable.

    Testing HDMI Cables

    So, how do you know if the cable that you have bought is of good quality or not? How do you check its continuity and output? HDMI cables testers will help you do so. All you need to do is plug in your cable into these testers and they will provide you with the results of the continuity test. At SF cable, we provide HDMI Cable Testers that test HDMI Type A and C cables without adapters. As ISO 9001-2000 registered manufacturers make our products, they are completely safe to use.

    Now that you have understood the types of cables along with their functionalities, let us look at some of the frequently asked questions on HDMI cables. The experts of SF Cable have answered them for you.

    FAQs on HDMI Cables

    Now that you have understood about the different types of cables we provide at SF Cable, look at some of the frequently asked questions about HDMI Cables:

    What is AWG?

    AWG is an acronym that stands for "American Wire Gauge". It is a unit for wire measurement. For HDMI cables, it refers to the size of conductors that are inside the cable. But remember, the smaller the number of wire gauges, the larger the wires. So, a 24 AWG cable comes with a thicker conductor as compared to a 28 AWG cable. A thicker conductor can transmit HD signals at remote places effectively.

    What is 1080p?

    1080p is an HDTV format having 1080 horizontal lines of resolution. Here, the “p” stands for progressive scan.

    What is the meaning of refresh rate?

    Refresh rate depicts the number of times per second that your device retrieves the data you transfer.

    What does Plenum Rated mean?

    Plenum is the air handling space above the ceiling and below the floors. In some buildings, there is a need for Plenum rated cable in some buildings as these cables burn slower when there are fire accidents.

    Do you have any other questions about HDMI cables or want to know which HDMI cable would be suitable for your needs? Get in touch with our experts on customerservice@sfcable.com. We will try our best to choose the right one.

    At SF Cable, you can find a variety of HDMI accessories including HDMI adapters, HDMI splitters, HDMI switches, HDMI cables testers, HDMI extenders, HDMI converters, HDMI matrix, Keystone Jack, Micro and Mini HDMI cables, panel mount HDMI cables and more.

  • Five Types of USB Type-C Adapters You Must Know About

    USB, an industry standard, serves the same purpose for devices as the language for humans! Yes. It enables devices to communicate with each other through a port and a connector. After releasing its first revision as USB 1.1 in 1998, USB is now available in Type-C. USB Type-C connector has gained traction in the realm of USB adapters with its slim profile and powerful functionality.

    What Makes USB Type-C Adapters Better Than Other USB Types?

    USB Type-C is not an average adapter. It has a high bandwidth and power delivery. It can transfer 4K content along with other large files and can power even most 15-inch notebooks. Higher data transfer, charging and video output capacity make USB Type-C a choice of Chromebooks and Apple MacBook Pro line. Also, smartphones using the Type-C adapter are on the rise.

    Being the providers of different types of adapters, SF Cable is here to acquaint you with five useful Type C USB adapters that can ensure a seamless connectivity between gadgets. We have described each one of them with their utility below:

    USB 3.1 G1 Type C Male to Type A Female Adapter

    You can connect peripheral devices to portable devices with this adapter. For example, if you want to connect mouse or keyboard with tablets or laptops, our USB 3.1 G1 Type C Male to Type A Female Adapter can come of help. You can also connect your smartphone and e-reader with this connector. The adapter is reversible and facilitates plugging in any orientation.

    Technical Specifications:

    • Data transfer rate- Up to 5Gbps
    • Length- 6 inches

    Click here to know more about USB 3.1 G1 Type C Male to Type A Female Adapter.

    USB Type C Male to VGA Female Adapter

    If you want to connect your VGA-enabled monitor or TV with the new MacBook Pro, Chromebook, or Tablets, our USB Type-C Male to VGA Female Adapter is for you. It is a reversible USB Type-C plug. It mirrors image from a connected device to a larger display. You have an image on your Chromebook. You can see it on a larger TV screen thanks to this adapter.

    It also provides the facility of showing video. You can use it in HDMI-enabled monitor or TV as well.

    Technical Specifications:

    • Reversible Adapter
    • Length- 7 inches

    Click here to know more about USB Type C Male to VGA Female Adapter.

    USB Type C Male to HDMI Female Adapter

    It is better to use a dedicated HDMI adapter to connect your device to HDMI TV or monitor rather using a VGA adapter. You can get better picture and video quality on a larger HDMI-enabled TV with the HDMI adapter as compared to VGA adapter.

    This adapter enables you to mirror USB Type-C compatible device to HDMI-enabled TV or monitor. It makes connecting a Chromebook, Tablets, and MacBook Pro to HDMI monitor or TV set easy. HDMI stands for High Definition Multimedia Interface. Our USB Type C Male to HDMI Female adapter combines digital video signals and multi-channel audio signals. It provides video and audio when available.

    Technical Specifications:

    • Reversible Adapter
    • Audio-video
    • Length- 7 inches

    Visit the page to know more about USB Type C Male to HDMI Female Adapter.

    USB Type C Male to Gigabit Ethernet Adapter

    Supposing, you have a smartphone but you do not have Wifi connection available. How would you access the Internet? Ethernet provides a solution to this problem.

    Apart from computers, the Ethernet has gained ground to interconnect appliances and other personal devices. Our USB Type C Male to Gigabit Ethernet Adapter connects your devices with RJ45 Ethernet Port. You can access the internet with this connector through an Ethernet connection.

    Technical Specifications:

    • Reversible Type-C Plug
    • Up to one Gigabit of speed depending on the connection speed
    • Length- 7 inches

    You can know more about USB Type C Male to Gigabit Ethernet Adapter by clicking here.

    USB Type C Male to DisplayPort Female Adapter

    DisplayPort is a digital display interface. It also works on digital signals like HDMI. We can consider it as an option to VGA and DVI technologies. If your monitor or TV is DisplayPort-enabled, then you need our adapter to connect it with the other device. For example, MacBook Pro and MacBook Air have mini display ports.

    The DisplayPort adapter connects your USB Type-C devices with such TV or monitor. Quite similar to HDMI adapter, this connector also provides both video and audio when available.

    Technical Specifications:

    • Reversible USB Type C adapter
    • Length- 7 inches

    Visit this page to know more about USB Type C Male to DisplayPort Female Adapter.

    SF Cable offers you an array of USB Adapters with premium quality. You can know more about our collection of USB Adapters by visiting our page.

  • Everything You Need to Know About Fiber Optics Cable

    In the recent years, fiber optics is steadily replacing copper wires. It is a better and apt means of transmitting communication signals. Today, fiber optics cable span across long distances between local phone systems. In addition, it also serves as the backbone for many networking systems including:

    • Cable TV services
    • University campus
    • Office buildings
    • Industrial plants
    • Electric utility companies
    • Internet connectivity
    • Stereo systems
    • Telephone systems

    Fiber Optics Cable use pulses of light to transfer data using the event of total internal reflection. The cable has a coating of plastic. This protects the cable from exposure to heat, cold, and other weather atrocities. It also protects the cable from electromagnetic interference and ultraviolet rays of sun. These cables are the most reliable and fastest data transfer cables on the planet.

    A fiber optics cable system is very similar to the metal wire system. The fiber optics is replacing the metal and copper wire system. The basic difference is that fiber optics uses light to transmit data; whereas metal wires do not. It sends the data down the fiber lines instead of using electronic pulses for transmitting data like in the metal wires.

    Fiber Optics Cables serve the purpose of connecting and transferring data across continents. They are fast and they can carry large capacity. The signals have higher strength and need least maintenance.

    Types of Fiber Optics Cables

    There are three types of fiber optic cable commonly in use. They are single mode, multimode, and plastic optical fiber or photonic fiber. Transparent glass or plastic fiber allows the guiding of light from one end to the other with minimal loss is the most efficient.

    Single Mode

    In a single mode fiber, the core diameter reduces to few wavelengths of the incoming light. For a beam with 0.55 μm of wavelength, the core diameter must be of the order of 4.5 μm.

    Under this situation, the core is so small that only the primary mode can travel inside the fiber. Given the wave broadcast of the light inside the cavity, there is no other way for the light to take longer optical paths.


    In this fiber, the core diameter is much greater than the wavelength of the transmitted light. The transmission of number of modes is simultaneous. The possible ways in which, light travels inside the fiber is relative to the fiber modes. The primary mode travels parallel to the axis of the fiber. Therefore, it takes the minimum time to reach the end of the fiber.

    When an incoming beam enters with an angle relative to the fiber axis, the light follows a longer path. Thus, it takes a little longer to reach the end. When you increase the core diameter, you can increase the transmission of number of modes.

    Photonic Fibers

    In photonic fibers, the number of cavities around the core guides the transmission of light. The core may be present in a glass or even an air cavity! These are new fiber optic cables available in the market. For the moment, their performances are still under the observation for astronomical applications.

    Fiber Optics Cable Connectors

    Fiber optics cable connectors make flexible connections possible. Fiber optics cable connectors are generally in use where flexibility is in need. Fiber optics cable connectors are also a necessity at termination points when an optical signal routes.

    Polish and Epoxy Connectors

    Polish and Epoxy style connectors were originally in use for termination. These are still under very high rate of extensive installation. These connectors offer a wide range of choices including SC, ST, LC, FC, SMA, D4, MT-RJ, and MU. Some of their advantages are present in the list below:

    Sturdiness - skill to bear higher levels of environmental and mechanical stress

    Cable size - Usability with cables of varying diameters, from big to small

    Multiple Connectors - Can handle single and multiple cables (up to 24) in a single connector

    Polish and No-Epoxy or Pre-Loaded Epoxy Connectors

    The main advantage of these connectors is that they are easy to install. This translates to lower skill levels in need to handle them. These connectors can have further division as follows:

    • Connectors without epoxy
    • Connectors with preloaded epoxy

    The fiber has stabilization by an internal crimp mechanism and these connectors are available in SC, ST, and FC styles.

    No Polish and No-Epoxy

    Simple design and low cost are the hallmarks of these connectors. The result of training and installation is a higher cost reduction. Moreover, this also enables fast restorations. They are available in SC, ST, LC, FC, and MT-RJ connector styles.

    Numerous connectors, both standard and proprietary, are in use in the field of telecommunication equipment, data lines, television, cable, and other industrial fields. The connectors described in this text are the ones that are under extensive use in the past. Many are still under use this very day.

  • Understanding USB Cables & Their Types

    USB has a special design for the homogeneity of computer connection peripherals. USB has replaced the large variety of earlier interfaces of the likes of serial and parallel ports. Earlier, we used both these ports for supplying electricity and for data transfer.

    Moreover, USB cables have also replaced the separate power cables for portable devices. The USB Cables are of the high demand accessories. The importance of USB has grown because the world has been passing through the smartphone boost.

    An industry body called the USB Implementers Forum (USB-IF) creates and maintains the USB standards. In its original specification, USB had the definition of only two connector types: A and B. The demands from the society and the necessity of adding more functions have expanded the breadth of connectors in use for USB devices. However, most USB products still use the A and B connector interface.

    File transfer, charging, portability, etc. are the few of the uses of USB. It is the universal connector, which has many variants in accordance with the functions. Even though the USB cables are universal, they serve different functions. Based on the purpose they serve; different variants of USB cables are available in the market:

    • Type-A
    • Type-B
    • Mini USB
    • Micro USB A
    • Micro USB B
    • Micro USB AB
    • Type-C
    • USB 3.0

    We elaborate them one after another below:


    Most cables, which connect the computer devices such as keyboards and mice, have USB of type-A. Personal computers have a connector of type-A. Type-A connectors serve the dual purpose of charging and data transfer. Type-A USB Connector is flat and has a rectangular interface. It holds the connection by friction, which make it easier for the users to attach and detach. The usage of rectangular contacts instead of round pins makes the connection even easier.


    This has also been in use since the 1990’s along with the type-A. It is almost square connector. For connecting printers and other power devices, which connect with the computer USB type-B are in extensive use. The connector has a slight beveled corner on the top ends of the connector.

    The type B USB cable connectors have a similar friction type holder, which also makes it easier for connection and disconnection. An “upstream” connector is only in use for connecting peripheral devices with USB type-B. In addition, it also requires an A-B cable.

    Mini USB

    USB Type-B connector had one drawback. Its size was a limitation. It measures up to half an inch from on each side. Thus, it made the usage of USB type-B unsuitable for compact personal electronic devices. The portable PDAs, digital cameras and cell phones were not easy to connect. This forced the manufacturers to develop the technology and come up with something more compact. The result was a USB Mini.

    USB Mini has two variants. One comes with five pins and the other has four pins. The default USB mini has five pins. The connector is very small and this makes it easier for connecting portable devices. Its actual size is about two-thirds of the size of USB type-A connector. USB mini with four pins is an unofficial connector. You can generally find it, with a shape like that of USB type-B, on many digital cameras.

    Micro USB-A

    It is an official connector recognized by USB-IF. You can find this connector on new mobile devices, GPS units, personal digital assistants (PDAs) and digital cameras. Micro-USB A offers a connection, which is smaller in size, than a USB Mini. All the same, it still supports the high-speed transfer rate of 480 Mbps and On-The-Go features.

    The identification of Micro USB A is very easy. You can identify it by its white colored receptacle and a compact five pin design.

    Micro USB-B

    It is also an official connector recognized by USB-IF. You can find this connector also on new mobile devices, GPS units, personal digital assistants (PDAs), and digital cameras. Micro-USB B offers a connection, which is smaller in size, than a USB Mini. All the same, it also still supports the high-speed transfer rate of 480 Mbps and On-The-Go features.

    The identification of Micro USB B is very easy. You can identify it by its black colored receptacle and a compact five pin design.

    Micro USB AB

    It has a special design, exclusive for USB On-The-Go devices. It is a versatile connector, which can either accept Micro USB A or Micro USB B cable connection. To identify this interface is as easy as eating a cake. It has a grey colored receptacle and a compact five pin design. This connector cannot exist on a cable. It can only exist on various On-The-Go USB devices.

    Type C

    It is a reversible cable. It promises higher transfer rates and more power than all the previous versions of USB cables. It is in a very high demand for standard uses in laptop connections, some smart phones, and tablets. Apple embraces USB type-C for Thunderbolt 3. The symmetrical design allows the plugging of USB C cable into any USB C device using either of its ends. USB-C cable has the capability of carrying USB 3.1, USB 3.0, USB 2.0, and USB 1.1 signals.

    USB-C can also have adoption with the previous versions of USB specifications. It connects with each of the legacy connectors like USB type-A, USB type-B, Micro USB, and more! It supports data transfer speeds up to 10 Gbit/second, which are twice the speed of earlier USBs. It also delivers more power of up to 20 volts, 5 amperes, and 100 watts for charging.

    USB 3.0

    It is also known as super speed connector. It is a very common connector, and we can find it on host controllers in computers. It is flat and has a rectangular interface. It offers faster transfer rates. It is backwards compatible with the earlier versions of USB. The standard USB type-A connector is similar in appearance with the USB 3.0.

    However, to distinguish between them, it has a blue colored lining. USB 3.0 has another variant as well. This variant has extra pins for allowing higher transfer speeds. However, it is not compatible with earlier USB connectors.

  • Everything You Need to Know About Ethernet Cables

    Network cables have been in the development since the Second World War. Technical progress in the last 40 years has made Ethernet Cables a ubiquitous part of our lives. It has become the most common medium for transfer of data in our society. It has also effectively achieved an ideal phase meeting the expectations of its original creators.

    The Ethernet cables are generally the last thing, which gets attention while setting up a wired internet network. However, they play a major role in network speed and accuracy along with its stability depending on the type of the cable.

    Looking at the history of Ethernet Cables, we can witness its evolution over the years. It has roughly grown by a factor of 10. It has grown from 10 megabytes (M) to 100M, and later from 1 gigabit (G) to 10G. Today, some data centers work at 40G and at times, it goes beyond 100G. However, in the past few years, the progress of Ethernet cables has been under diversification. The demand from the Internet has exceeded its original conception as having a simple use for LAN and WAN only.

    The diffusion of ethernet into every single corner of the industry is the driving force behind this demand for diversification. Together with the Internet of Things (IoT), ethernet cables have been inseparable parts of our lives. Thus, for meeting these diversified uses and demands, Ethernet Cables underwent severe evolution. Not just the cable but also, the most significant and important area where changes are happening is in intelligent buildings. It mainly consists of copper cables.

    The development of intelligent buildings, along with development of WLAN (Wi-Fi) and IoT, require few more things to create a network. It requires Ethernet Cables to be capable of two vital tasks. One being data transmission and the other being power supply. The power supply refers to Power over Ethernet (PoE). Here, the cable uses Ethernet as the medium for electrical power as well.

    The aim of PoE is to gradually unify all low-energy consumption terminals. This becomes simpler when it uses a twisted pair copper cable to create a network. It solves a major problem of linking different terminals with the power outlets. It can connect various units such as:

    • IP Digital Phone
    • Digital Cameras
    • Wireless Access Points
    • LED Lighting
    • Smart Control Systems
    • High Resolution Audio/Video equipment

    So what are the different types of ethernet cables?

    Generally, users prefer to choose among the Cat5, Cat5E, Cat6, and Cat6A Ethernet cable types. On the other hand, not many of them know that there are actually two main different types of network Ethernet cables available in the market. These are the flat Ethernet cable and round Ethernet cable. Let us compare the flat and round cables and know the main difference between these cable types.

    Flat Cables

    The Cicoil Corporation from USA made the flat Ethernet cables for the IBM computers after about ten years of World War 2. They are in use in the field of the military, robotics, aerospace, and others since then. These cables become a necessity where high-end computing is in demand. The flat cables provide efficiency in packaging and flexibility in usage. It also contains the ability to reduce electronic noise & vibration during operation.

    Round Cables

    The round Ethernet cable is a form of an insulated wire. It contains some layers of filler substance. All this together keeps the original circular shape. It helps in minimizing the heating in the Ethernet cables due to the friction. Such filler material also guards the cable from the outer environment. In the industrial and manufacturing fields, the usage of round electrical wires is most frequent.

    Apart from flat and round ethernet cables, it can further have classification based on build categories. In the later part of the 1980s, the world saw the introduction of Category 3 cables. It could support voice services as well as 10BASE-T Ethernet. However, this eventually became inapt by the mid 1990’s. By this time, Category 5 had become widely popular. It was able to support faster network speeds up to 100Mbps.


    The next phase of cable and connector development came in with the preface of Cat5e. It could support Gigabit network applications with a higher efficiency. Cat5E is in simpler terms, an enhanced version of Category 5. On the other hand, Cat5E standards brought with it some new and more stringent crosstalk specifications. It did allow Gigabit network applications and high data transfer scenario. It had a much more reliable functionality, enough for making Category 5 obsolete.


    Over the last decade, Category 6 (Cat6) cable and connectors have become a basic requirement. Cat6 Cables are extremely important for creating a network that supports Gigabit network applications. Moreover, a network which supports bandwidth of up to 250MHz.

    Both Cat5E and Cat6 plug into the same keystone Jack of your Ethernet jacks, routers, and switches. However, they both have a distinct use, design, and application. Both cables have pair of cables with some twists of copper wires.

    The Cat5E Keystone Jack supports speed limit up to 1000 MBPS while the Cat6 cables has a speed limit up to 10GBPS over 120-150 feet. The cost of the cables varies by length and differs from one manufacturer to another. The standard Cat5E costs generally around $0.20 per foot. Moreover, the standard Cat6 costs around 20% higher than the Cat5e.

    After the introduction of Cat6, it was costly as compared to Cat5E. This made it almost impossible to use. However, since then, it has proved its worth and its cost also reduced. Today, Cat6 has become the minimum requirement for installing network connections.

    Cat6A Cables

    The “A” stands for augmented in Category 6A Cables. It supports data rates of 10 Gigabytes per second up to 100 meters. In addition, it also supports a bandwidth of up to 500 MHz. It has begun to growing popularity. The speed of CAT6E has a 10GBPS (Gigabit) limit up to 164 feet and thereafter its speed is same as that of CAT5E.

    It is much lighter and slimmer than earlier cables. Its use has been aggressive in the healthcare and educational institutes. Cat6a also provides power over ethernet (PoE), which gives it an edge over others.

  • What Should You Consider Before Buying HDMI Cables?

    Watching videos has been a part of human civilization. The video viewing experience has been evolving since its invention. Today, we enjoy videos in high definition. However, it was not always like this. Before the high definition age, there were many video connections available for TV, VCR, DVD, HDTV, and Monitors. This worked rather on analog signals or both like the Digital Video Interface (DVI). The most commonly used monitor cable was the Video Graphics Array (VGA) cable.

    Let us see the progress of these cables in brief.

    VGA - Video Graphics Array

    IBM introduced Video Graphics Array (VGA) in 1987. VGA was one of the most commonly used video cable for linking monitors with the central processing unit of a computer system. It was capable of supporting resolution up to 640x480. In addition, it had a range of 16 Colors. The range of colors was directly proportional to the resolution. That is, you could adjust the resolution up to 320x240 for increasing the range of colors.

    This was a very useful function in use for gaming back in the last decades of the 20th century. Its name was Mode 13h. Analog video signals were in use for transmission in VGA. It faded away after the new technical developments of the digital age. It consists of an arrangement of 15 pins in three rows. Here, each row is in connection with the three different color channels for use in display. Namely, red, green, and blue are the colors.

    Composite Video

    The most popular home video component for audio and video devices that was evident in earlier times was Composite Video. It had three distinct set of cables, the trio of - the red, yellow, and white of the RCA connector. RCA refers to the metal connectors found at the end of these cables manufactured by the Radio Corporation of America (RCA). It had a very important role in popularizing this connection type.

    Its basis is analog television signal. Later it modulates onto the RF carrier. The transmission of video signals is over one cable with a single set of composite analog signals. The process further involves demodulation of the modulated composite analog signals. The final video display in the TV introduces several losses due to this. Moreover, the conversion itself produces noise.

    Digital Video Interface

    The Digital display working group launched DVI in 1999. The introduction of DVI in the market was after 10 years of IBM’s innovative VGA cable. Digital video interface is capable of transmitting both analog and digital video signals. It can convert the analog signals into digital and vice versa. This made it easier for accommodating both digital and analog monitors.

    It consists of a single plug, carrying the legacy of VGA. It introduced the new digital only plug connector. It can handle bandwidths in excess of 160 MHz and can support HDTV and UGXA. The cable generally consists of 28 pins. Out of these, 24 are in use for the digital signal and the rest for analog signals. The DVI dual link supports resolution up to 2560 by 1600 pixels.

    These are few technologies of the earlier times. This is the age of high definition. High definition and higher transmission speeds. Moreover, least amount of noise while connecting the video viewing screens with the central processing units of a computer. The new modern cables are the high definition multimedia interface.

    Let us find out!

    High Definition Multimedia Interface

    HDMI Cables brought the dawn of the new digital. It is a technology, which came into the market within the first two years after jumping into this millennium. HDMI Cables use a technology, which combine digital video signals and multi channel audio signals into one suitable cable. This eliminates the maze that you assemble around your setup! The set up becomes less complex, it reduces the cost, and managing of the cables can be convenient.

    Higher Transfer Rate

    First, HDMI Cables are capable of sending uncompressed digital video and audio signals. It sends these signals at a very high transfer rate up to 5 gigabytes per second. In simpler terms, it has the capacity to send large amount of data across a long stretch of wire. Moreover, it can accomplish this task at a very high speed. As you would know, the high resolution and high definition videos need sampling at a very high rate. This makes the output sharper and clearer than the analog signal interfaces.

    Enlarged Compatibility

    With the earlier introduction of Digital Video Interface (DVI), you had to plug in the audio cable separately. The requirement of two cables was, as it could carry only the digital video signals. Its length too had a limit of around 16 feet. Above this limit, the quality underwent a compromise. You do not need to worry! HDMI Cable is also compatible with your pre installed DVI. This eliminates the need of immediately upgrading the existence cables and components.

    Enhanced Quality

    HDMI Cables are the first and foremost interface to carry high definition video of the likes of 720 & 1080 resolution. Along with this, they also support multi channeled surround sound signals. It can be as long as up to 40 feet while still maintaining the optimum quality.

    Control Entire System

    Another key feature of HDMI Cables is that it provides the ability to control the entire system of components and display by using a single remote control.

    Newer Versions

    Today, there are many versions of HDMI available in the market. They are compatible with the new generation TV, receivers, and other gear. The versions are HDMI 2.0, 2.0a, 2.0b, and 2.1. Depending on the resolution, you can choose the version. HDMI 2.1 is the latest update. It supports a maximum frame rate of 120Hz and supports dynamic metadata. You must control your excitement and know the purpose of choosing the higher versions.

    In general, all the devices, which support HDMI, are of the HDMI 2.0 version. It supports a maximum resolution of 4k. It has a frame rate of 60Hz. However, it is not HDR or WCG compatible. Here you can choose HDMI 2.0a or 2.0b in accordance of your need. You must also understand that not all the computers and TV monitors resolution as high as that of the likes of 10k. Moreover, not all of those devices support a frame rate of 120Hz.

    The basic knowledge of these cables is must before opting for an upgrade.

  • Know Everything About HDMI Technology

    The video and picture viewing expertise has improved over time. Since the start, analog signals have been the principle technology. Through the years, it evolved to both analog & digital signals together. Now the technology has finally paved its way into the zone of digital signals.

    Not just the technology but also the cables which carry these signals, evolved over the time. From the monitor of a computer to a Television set or, even a home theatre system; they all feature different sets of connecting ports. These ports allow the usage of different types of cables and support different set of signals. Driving force behind this change is the growth in scientific developments.

    It was the question of survival for many companies. They had to provide the users something new for staying in the aggressive market. The companies finally could take a step forward after investing ample amount of hard work. So did the buyers. The 21st century is arguably the spark plug of the digital age. The video viewing technology is the driving forces behind this.

    Before this high definition age, there were many video connections available for TV, VCR, DVD, and HDTV & Monitors. They all operated on analog signals. The most commonly used monitor cable was the Video Graphics Array (VGA) cable. Further developments popularized the Digital Video Interface (DVI). It operated on both analog and digital signals. They all had certain limitations and the latest High Definition Video Interface overcame them all.

    Let us check out this new technology.

    HDMI (High Definition Multimedia Interface)

    HDMI brought the dawn of this new digital age. It is a technology, which came into the market within the first two years of this millennium. HDMI Cables operate this technology, which combines digital video signals and multi channel audio signals into one convenient cable.

    How does this differ from earlier cables?

    Well for a start, this can eliminate the maze of wires that use to assemble around your earlier setup! It aids in convenient management of cables as it reduces the complexities and cost.

    Quality with More Flexibility

    With earlier technology of Digital Video Interface (DVI), you had to plug-in the audio cable separately. As it could carry, only the digital video signals, it created this limitation. If its length was more than 16 feet, it compromised with the quality. The usage of HDMI eliminates this hassle. It can be as long as up to 40 feet while still maintaining the optimum quality.

    In addition, you do not need to worry if you are looking for an upgrade! HDMI cables are also compatible with the DVI. Hence, it eliminates the need to upgrade immediately your existing cables and components.

    Higher Resolution and Remote Control

    HDMI is the first and foremost interface to carry high definition video of the likes of 720 & 1080 resolution. It also brings in the multi channeled surround sound signals.

    Another key feature of HDMI Cables is that it provides the ability to control the entire system of components and display unit using a single remote control.

    Higher Transfer Rate

    Above all, HDMI Cable is capable of sending uncompressed digital video and audio signals at a very high transfer rate up to 5 gigabytes per second. In simpler terms, it has the ability to send large amount of data across a long stretch of wire and that too at a very high speed.

    As you would know that the high resolution and high definition videos sample at very high rate, the output is sharper and clearer than the analog signal interfaces and the conversion from analog to digital signals can have room.

  • Power Cords : The Lungs of Our Electrical World

    We cannot separate electricity from our lives. Majority of our day-to-day activities are either contingent on machines or electricity. Electrical supply is inevitable for machines. An electrical appliance requires a means to stay connected with the grid. A metal conductor sheathed inside a poly vinyl chloride insulator known as a power cord is that means.

    Power cord, power connector, mains cable or line cord - call it with any of those names but the purpose it serves would not change. These power cords allow us to build a system of temporary connection. Using them, we can connect our electrical appliance with the wall socket or an extension board. It has two ends. The receptacle attaches one of those ends and the socket installs the other end. This arrangement is flexible and absolute.

    Some appliances are purely power driven. They always need the electrical supply for its operation. For connection with the mains electrical supply line, these appliances require power cords. Few appliances are battery backed. They majorly need the connection only to recharge their batteries. These cords are capable of carrying alternating current as well as direct current.

    IEC Connector

    IEC is a non-profit and a non-govt organization. It sets specific standards for connectors, which attach the power cord with the electrical appliances. These connecting couplers are available in different combinations of earthing, for temperatures and current needs.

    Using these connecting couplers, merchants can produce appliances for multiple markets. Now, power supply standards differ from one country to the other. Therefore, the merchants just need to change just the power cord. This saves additional cost and time. Moreover, they can supply these power cords across the world.

    IEC 60320

    IEC 60320 is a pre set standard safety regulation for general home electrical appliances. As per the regulation, voltage needs to be “Not more than 250 volts” (AC). In addition, the current needs to be “Not more than 16A.” In 1970, IEC’s first edition was in publishing. Classifying based on standards divided IEC 60320 into several parts. These standards define the electrical, thermodynamic, and mechanical requirements along with the safety goals of power cords.

    The IEC standards are acceptable across the world. However, some North American Rating agencies rate the products higher than IEC. This includes Canadian Standards Association (CSA), the UL Safety Organization of the US.

    For example, IEC specifies C13 Power Cord with the rating of 10A current. But due to the tolerance threshold of 5% of 120 V in US & Canada, UL specifies it up to 15A.


    Most of the computer desktops and some instrument amplifiers, printers, monitor and other portable devices use the c13 power cord, which has a standard specified under IEC 60320. This is a power cord and one of its ends attaches a country specific standard power plug. A coupler attaches its other end and an IEC cord or a computer power cord is its name. Computer Cord, as its major use is in computer applications.

    Household sewing machines use a specific type of standard under IEC 60320-2-1. These are not interchangeable with other power cords from IEC 320.

    The IEC 60320-1 includes other general household equipment power cords. All the equipment enlisted under this standard, operate under the normal 250 Volts, and 16A.

  • Everything You Need to Know About Nema Power Cords

    The plug and socket are something that we have used a million times in our lives. The plug and socket have been a historical discovery. Today we plug different types of electrical appliances in the socket easily without much risk. However, has it always been so simple and safe? No.

    In earlier times, people use to plug in electrical appliances with mere open-ended wires. Sometimes even with incompatible plugs! Today almost each country in the world uses its specific standards for plugs, sockets, and power cords. So how is the installation of electrical appliances in the sockets today with negligible risks?

    Answer is simple!

    Using Power Cords. Power cords are the line cable or mains cable. It is this cable, which bears the burden of temporarily connecting a portable electronic appliance with the main electrical supply line. It makes this possible by the attached pair of connecting couplers on its either ends.

    These connector power cords are detachable from the mains supply line and the Electrical appliances. Power cord is a flexible and an insulated conductor having one male and one female connector attached at its either end. All these power cords and its coupler designing by the manufacturers across the globe are on the preset standards set by the International Electrotechnical Commission (IEC).


    Back in 1926, the establishment of National Electrical Manufacturing Association (NEMA) in North America took place. It developed NEMA 1 connector. Today NEMA power cords are in use all over North America and in countries, which have specified the NEMA standards. Other countries have created their own set of power plug standards. It can destroy the appliances, if these are in use with unmatched power supply.

    NEMA Power Cords

    A basic NEMA connector has two pins or flat prongs, which are almost 5 inches apart from each other; it is the NEMA type 1. If it also consists of a round pin or prong right below the two flat prongs, NEMA type 5 is its name. A “grounded plug” uses a third pin for grounding purposes.

    Safety Measures

    There are many variants of the NEMA plugs available in the United States and North America but NEMA type 1 & type 5 are the most common among them. Some NEMA plugs undergo polarization. These plugs need a special attention when plugged in the socket.

    If not installed in a specifically instructed manner, it can destroy the appliance. To avoid this kind of an accident, its design is such that the specific prong of the plug fills a specific hole of the socket. Hence, these types of NEMA plugs have two flat pins of unequal length.


    The main classification of NEMA devices includes straight blade and locking. In the household consumer goods consisting of electrical appliances, Straight blade is evident. The locking NEMA power cord is in use for the major industrial applications.

    Straight blade has a design such that detaches it swiftly and the latter has a design such that it does not detach easily from the receptacle. A receptacle is a device mounted on an electrical appliance where the external power cord attaches.

    The curve blade of the locking type of NEMA cord allows the plug to entwine and lock into the receptacle. The letter L preceding the NEMA code identifies the locking conductor.

  • Secrets of Mysterious Ethernet Cable Revealed!

    The most important equipment used on wired computer networks is an ethernet cable. The use of Ethernet cable is for connecting computers, routers, switches in a local area network. It looks like a phone cable but has more wires and is larger. These cables are physically attached they need to have certain peculiarities. The cables’ physical characteristics alter or modify in accordance of the requirements.

    The purpose of the cable’s usability gave birth to different categories. Different type of network cables design creation is to ensure its performance of certain tasks in a particular situation. Therefore, which type of ethernet cable suits the best - is a common headache for us. Why do these cables contain twisted pair of wires? Sometimes these wires have a cover, sometimes they do not. Why so?

    The cable designs vary in length, range, intensity, and ability in transmitting network signals. The available standard ethernet cables in the market are the category 5 (CAT5), enhanced category 5 (CAT5E), category 6 (CAT6). The last standard cable is the augmented category 6 (CAT6A).

    Let us examine the differences closely.


    The higher you go in the category, higher is the speed and frequency. The stringent testing elements and added isolation between the wires makes this possible. CAT5 is a standard ethernet cable with the maximum transmission speed up to 100MB/second and a frequency of 100MHz. For Cat5E, the maximum speed rises up to 1GB/second.

    The frequency evolves with the Cat6 up to 250MHz along with the maximum speed of 10GB/second. For achieving this speed, Cat6 compromises with its length. All three cables have the maximum length of 100 metres, but for achieving 10GB/second, the length reduces to 55 meters.

    CAT6A is the fastest amongst these cables in terms of speeds and frequency. Its length too, unlike the CAT6 remains 100 meters even when it is transmitting 10GB/second. It has a limitation though. The higher frequency up to 500MHz eliminated the alien crosstalk, which could enhance the longer ranges up to 10GB/second.

    Twists and Turns Mystery

    Alexander Graham Bell while discovering the telephone invented the twists and turns on the cable. For increasing the range and reducing the interference, the cable has twists at regular intervals. This principle of a twisted pair of wires became the basis for our ethernet cord.

    There is no predefined standard for the twists, but within a cable, there are specific numbers of turn at regular intervals. A lan cable contains more than one set of wires and these sites have twist lengths based on prime numbers. This is to avoid any twists to align.

    Shielded Wires

    The primary goal of all the internet cable wire manufacturers is to reduce the external or internal interference while transmission. For achieving this, the wires underneath the sheath have shields. It has a very higher efficiency and cost. Nevertheless, your computer's connection with your wall keystone Jack does not need such high efficiency. Therefore, that can be without shields.

    The shield protects from internal cross-talk and interference. Lesser the interference, higher the efficiency!

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