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Design And Construction Of A 220-250Mhz Wireless Video Transmitter

The design and construction of a wireless video transmitter operating in the 220-250MHz frequency range require meticulous attention to various technical aspects. This project involves engineering a high-frequency circuit capable of transmitting video signals wirelessly within the specified frequency band. Key considerations include selecting suitable components such as oscillators, amplifiers, modulators, and antennas to ensure optimal signal transmission and reception. Moreover, implementing efficient modulation techniques like amplitude modulation (AM) or frequency modulation (FM) is crucial for maintaining signal integrity and minimizing interference. The design process should also address power requirements, signal range optimization, and regulatory compliance with relevant standards such as FCC guidelines. By integrating these elements seamlessly, the resulting wireless video transmitter can offer reliable performance and seamless video transmission for diverse applications ranging from surveillance systems to multimedia broadcasting, enhancing connectivity and communication in modern wireless networks.

ABSTRACT

Wireless video transmitter is a device for transmitting domestic video signals wirelessly from one location to another. It is most commonly used for sending the output of a source device, such as a satellite television decoder, to a television in another part of a property and provides an alternative to cable installations.

This wireless video transmitter enables you to send video and audio from one location to another without expensive and messy wiring. It works with all types of wired video camera (NTSC or PAL). The device works on its own transmission system. There is no need to have internet or WIFI connections. No software installation required.

CHAPTER ONE

1.1 INTRODUCTION

With so many electronic devices competing for space, your living room can easily turn into a chaotic mess of tangled cords. A wireless video transmitter can help you keep things tidy by providing quick and easy access to your devices. A wireless HD video transmitter translates AV signals from your DVD player, DVR, IPTV, or other devices by sending an AV signal through the air using radio waves. These devices boast a long transmission range and strong resistance to interference. A wireless video transmitter allows you to enjoy high-quality video and audio throughout the house, as the signal easily passes through walls. Available from a number of top brands, these devices offer convenience that saves you the headache of using extension cords to connect DVD players or other devices in separate rooms. A wireless video camera transmitter can send your camera footage to a satellite system and then directly to your television. Most of these audio and video sets utilize plug and play technology and do not require software. The large inventory on eBay includes an assortment of transmitters for different systems and needs.

OBJECTIVE OF THE PROJECT

The objective of this project is to design a wireless video transmitter which operates on 200-250 GHz frequency. This is higher than most Wi-Fi systems, so there is less chance of interference. It is also low enough in frequency to have decent performance through walls. It’s able to transmit uncompressed video, but at the cost of reduced range and robustness.

1.2 SIGNIFICANCE OF THE PROJECT

The products mentioned here are for the wireless transmission of high definition (HD) video and audio signals from an HDMI source to a TV. There are three main uses for a wireless high definition:

If your sources are in a different part of the room than the TV, you can send the signal wirelessly instead of running long cables across the floor (or under the floor, or along the baseboards, etc). This is an especially common problem with projectors.
If you want to mount your TV on the wall, you need to run power and HDMI cables. With wireless, you only need to run power to the TV. The signal from your sources gets sent wirelessly to the small receiver box.
If you want to have your sources and TV in two different rooms. Again, it is a good pick here because it is able to transmit through walls and has a “local” HDMI out, so you can have a TV in the same room as the sources, and a second TV connected wirelessly to the same sources.
If you have equipment specifically with HDMI outputs (Blu-ray players, cable boxes, Apple TV and Roku streamers, etc.).

Keep in mind though, there is a cost to the convenience. Wireless is always going be more temperamental than wired, taking a few moments to sync up (connect) and potentially/occasionally dropping out.

1.3 LIMITATION OF THE PROJECT

The only drawback is that it requires a tiny bit of signal compression in order to function properly. Which can only be notice when using a huge screen over a long distance.

These all work on the Wireless HD standard and are capable of transmitting uncompressed video. Unfortunately, they only work when there’s no obstructions, such as walls or cabinets, between the transmitter and receiver. In other words, you’re out of luck if you want to place the TV in a different room from the sources. Worse yet, many cabinets will block the extremely high-frequency signal, so hiding your sources away in furniture won’t work either. In my testing, even walking between the transmitter and receiver can disrupt the signal.

1.4 SCOPE OF THE PROJECT

In this fast-paced world, there is little time for inconveniences and a greater need for portability and adaptability. The idea for an Video transmitter stems from this need. There may have been times when you’ve wanted to hook up your VCR from one room to another television set in another room. But that would have entailed that you first unhook all kinds of wires and plugs from the primary TV set; carry the VCR to the next TV set; and then finally re-wire everything together. An Video transmitter will let you do just about the same thing. But it would offer other conveniences as well. For example, it would allow you to set up security cameras around your home which would send video signals directly to a TV or VCR. And, there are no cumbersome wires and cables to line throughout the intended area.