other Approaches


A better experience

altFor this edition of the magazine AVI LATINOAMÉRICA, the company NEC brings a successful case study in advance at the MGM Mirage in which the experience of visitors to Las Vegas by implementing an effective digital signage system was improved.

To see it all in one computer

When you have a system that allows all the information is centralized on a screen, monitoring and control of images becomes much easier.
by * RGB Spectrum

Processors viewing multiple signals are used in control rooms to present visual elements and data, as well as facilitating decision making group. This solution can be a multiple display with a single screen or video wall of multiple screens. The processor supports the selection of entries, the size and position of windows in those shown.

To facilitate understanding, greater emphasis by adjusting the size and position of windows by juxtaposing related information can be achieved, as well. The screen cursor lets you control the processor and can also be used as a pointer. However, conventional systems offer limited control mechanisms the source images; what is needed is an application that combines the control and display space source inputs without interruption. The techniques described in this article represent a solution to this problem.

As described below, a complete system consists of a control computer, sources of images and display processor connected via a network or networks. Image sources may include computing devices and video sources controlled by the keyboard and mouse, as PTZ (pan, tilt, zoom) Or digital video recorders (DVRs). A source computer can be any computer-based device that provides video, including data, images or transmission of live sources. In each of the control equipment agent remote data access configured to communicate with the host computer via an IP network is installed, the latter is used to configure and manipulate each of the connected devices.

Consider some of the applications monitor, keyboard and mouse (KVM) more common, as GoToMyPC® and pcAnywhere®. Such applications are based on IP networks for transporting video and control them. However, the low-resolution video and slow response time are usually due to the limited bandwidth available in IP networks. This, however, is not a problem for transmitting input signals keyboard and mouse, as the bandwidth requirements for controlling the keyboard and mouse are minimal. However, for optimal video quality, remote computers can connect to the display processor through a video interface, for example, a digital visual interface (DVI).

Several images, one screen

RGB Spectrum has developed a solution that can be used with multiple display wall processors and displays, called Integrated Control System with KvM. This system is a hybrid that combines the direct connection of video and IP connection for keyboard and mouse; hence the change in nomenclature standard KVM sector "KvM". Video inputs are routed directly to the processor and synchronized with the control signals transmitted through the IP network. This hybrid solution provides high bandwidth for video signals and flexible data transfers signals for the keyboard and mouse. Video over IP technology in cases where it is not possible direct connection of the video due to distance or other reasons can also be used.

Figure 1 is a graphical representation in which an example of a display system and integrated control is shown. IP networks control may be one of the many possibilities, the most common being Ethernet.

The display processor, the control computer and home have unique IP addresses. In each of the control devices agent Remote Data Access (RDA) is installed. To create a secure session, passwords and coding systems of private keys and public keys between the source computer and control computers are used. They can also be used such as security mechanisms in the transport layer (SSL), layer sockets Secure (SSL) shell secure (SSH) to provide greater security.

A complete system also requires an effective user interface for controlling the display processor and the source computers. A particularly suitable system would offer:

  • A cursor on the screen that allows to move around the display area.
  • unified control and display processor computers through a single mouse origin, without using other devices, physical or otherwise, for example, icons or menu screen.
  • A keyboard for data entry.

working together

In implementing the integrated control system with KvM, switching between controlling the video processor and the source computers it is as simple as clicking the mouse.

1. The cursor on the screen lets you control the video processor and the source computers.

to. Switching between controlling the video processor and the source computers is simple.

b. optical nuances on the screen: the size and shape of the cursor indicate if it controls the video processor or computer source depending on the position coordinates X and Y. For example, at first the cursor is on mode video control processor and displayed as a large arrow.

2. A single mouse controls the display processor and the source computers without using other devices without a screen space dedicated icons or menus required.

to. The mouse controls a source computer when the cursor is located within the window in which images are displayed. Outside the window the mouse controls the display processor. The operating mode changes depending on the mouse position.

b. When the mouse is in display processor mode, the cursor can also be used as a pointer and / or to control the size and position of windows on the screen. For example, when the cursor is located within a window, you can click the left mouse button and hold it to drag the window to a new position on the screen. If the cursor is located on the edge or corner of the window, you can resize the window.

c. When the cursor is placed inside a window, just click the mouse to change control mode and the computer display in the window. It now appears smaller cursor indicates the mode change. In addition, you can use the computer keyboard functions control. It is also possible to manage multiple computers: when the cursor is moved to a window, it controls the computer shown in the window.

d. If the cursor is moved out of a window it returns to the display processor mode that lets you control how the source images are displayed. (Figure 2).

3. A single keyboard is sufficient for all home computers. This keyboard also allows track the mouse behavior. In short, the user interface is very simple and intuitive. A single mouse and keyboard is all you need.

In short, RGB Spectrum solution provides a unified environment for visualization and control of computers and devices managed by a computer system. By using a direct connection to video in addition to the IP control, the hybrid solution can benefit from the advantages of both types of connectivity and transport of high quality video and flexible control. The video quality and resolution, response time and frame rate are significantly higher than those of other solutions based on video over IP. The system works with a single mouse controls the cursor on the screen and an optional keyboard for data entry. This hybrid system is complemented by the user interface for a control without interruption, in real time, and a time of unparalleled response.

The control system integrated with KvM is an option available for video wall several screens and processors MediaWall® display multiple signals SuperView® RGB Spectrum.

* RGB Spectrum ® designs and manufactures subsystems videographic and multimedia hardware.

Latin America and the dangers of AC power

While electronic specified in a corporate board, a nightclub or a sports scenario can be totally different, they all need power to function and as a result all face the same dangers.

by Garth Powell *

When one talks about the dangers of AC power, usually the first thing that comes to mind is the lightning. Actually, lightning is a serious threat to electronic equipment, particularly in many regions of Latin America. In fact, some equatorial regions of South America experienced the highest annual impacts rays than any other place on the planet.

Lightning can cause catastrophic moments on the voltages (shaking) to pass on wiring, wires, tubing or any other conductive material, and can be devastating for electronic equipment. Because the beam load an incredible amount of energy, there may be damage to equipment within a mile or more away from where it presented the direct impact. Even if the current of a lightning strike does not lead directly to a site, the electronics can be damaged by a nearby impact because the wires pick up the electromagnetic field generated when the impact occurs.

A system of structural lightning protection installed properly composed arrestor rod and conductors ranging from the grounding system of the building will protect the building itself; however, they are electronic therein remain at risk. A guard at the service panel can be an effective first line of defense, but because many shocks can occur within a building (after the panel), protection must be used at the point of use at each site where they are the teams. Such protection should cover not only the AC lines but also any coaxial or telephone line, since harmful jolt can pass through the signal lines as easily as they do power lines. Technology in the most advanced management components current energy can protect against almost anything, besides a direct lightning strike on the incoming line or the service panel (thank goodness this is an event that happens very rarely).

However, the dangers of AC power for any reason are limited to the impacts of lightning. The energy infrastructure AC was built over 100 years ago, and although the technology in our equipment has evolved, the basic system to power the equipment remains obsolete, outdated and in many areas has poorly maintained and has many problems.

For example, in many parts of Latin America, the transmission of AC power that is consistent (ie, constant energy, without blackouts) or not present voltages to fluctuate dramatically in the day or during the week (voltage constant AC - regulation ) is very rare, unfortunately. Users generally are forced to resort to industrial voltage regulators rudimentary at dieses generators, gas or ferro-resonant devices AC just to maintain basic services. In addition to this, it is the fact that most of its sensitive electronic components were created for an average of 120VAC (not 127 normally found in many areas such as Mexico) or 220V-240V, and at most only accounts with a booklet annotations to operate deficiently electronic circuits, and to make matters worse they have a limited life and the continuing need for reloading or repair.

Given this, the best that can be expected for some challenging installations is to use what you have on hand in order to keep the equipment running. However, the device management AC power that is suitable for lighting or electric cooling is perhaps not appropriate for sensitive current microprocessors circuits (ie, computers, server systems, automation, processors audio-video, projectors and safety equipment).

For example, the active devices yesterday (such as tubes and transistors vacuum) could handle large pulses of temporary voltage without any problems, while current circuit boards densely packed and critical microprocessors are highly susceptible to arcing voltage. Three volts are sufficient to cause permanent damage to many connections.

By design, services or local power substation countless impulses sent through a weekly AC wiring. In fact, they could be among dozens and hundreds of pulses daily. This is due to necessary changes of a transformer (or supply subsestación) to another during the day, thereby adjusting the high demands. This hidden danger is the cause of many seemingly inexplicable problems and many erratic in today's electronic behavior, and without proper protection problems will manifest themselves more frequently with the passage of time (greater digital errors, data loss and distortion , just to name a few).

In addition to the temporary impulses, another substantial danger to equipment are sustained overvoltage conditions. The sustained surge can be caused by many reasons: failure of wiring in an electrical system of a building can lead to the loss of a neutral line, a storm or an accident can cause a power line high voltage has contact with a line low voltage distribution, or malfunction in energy services that may cause a catastrophic overvoltage condition, with consequent immediate destruction of the computers that are connected unprotected. Many savers energy impulses and tapes offer no protection against these conditions and, in fact, may involve a risk of fire. To properly protect a sustained surge, make sure your device power management circuit have an extreme voltage shutdown constantly monitor the incoming voltage and disconnect the power instantly when there is an external nominal range.

Finally, it should be noted that the electronic equipment is designed to work with power 120V or 220V-240V, depending on the country where we live. Always load a voltmeter and check the incoming voltage at each installation site before specifying the equipment. Although each energy service will endeavor to provide a nominal voltage, load conditions, the resistance of lines or poor regulation in the main transformers can cause supply voltages above the nominal given range. In this situation, a voltage regulator must be installed.
For installations A / V, seek a regulator that provides solid state switch to eliminate noise while regulation is performed. This ensures that sensitive components that require high current regulation and low noise work optimally.
There are clearly many considerations that must be taken into account in relation to AC power and how to offer the best way to customers high performance and investment protection. In future articles, we will look into problems such as unstable voltages and noise from the AC line, and how to solve them in the best way.

*Garth Powell is the Senior Product Designer and Senior Sales Engineer Furman, a world leading provider of energy management solutions. It can be contacted at: garthp@furmansound.com.

Quoting products and technical services for Latin America

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