Hd Digital Receiver

[Егор Ульянов]

The822 receiver is compatible with pure digital transmitters from the D Squared line including the DBSM, DBSMD, DBu, DHu, DPR and DPR-A. The 822 is also compatible with stereo digital transmitters including the DCHT and M2T. Finally, the receiver is also backward compatible with any Digital Hybrid Wireless transmitter made in the last 20 years.

The LR-300-072 Portable Digital RF Receiver provides the same unbeatable audio performance as our full-featured receiver line in a simple, affordable package. Capable of receiving the 17 most common wide-band channels, the LR-300-072 features convenient recharging options, strong signal reception and audio clarity, and a multi-function LED in place of the LCD screen available on our other digital receivers.

Note: The LR-300 is available only for use on the 72 MHz frequency, and is approved for assistive listening use in the U.S. by the FCC. Check with your local government for specific regulations regarding broadcast frequencies in your country.

The number of people accommodated in a space is calculated according to NCC Volume One Section D2D18. A binaural or stereo headset should be provided with every receiver for AS1428.5 : 2021 compliance. via Australia NCC Code 2022 part D4D8

With over 25 years of experience in the industry, we have a deep understanding of the unique requirements of our technical partners. Our team of experts is dedicated to delivering the highest quality products and solutions to support the success of your operations. Our systems are designed to withstand the toughest environments and provide mission essential capabilities in even the most challenging conditions. DRT is committed to staying at the forefront of technology and innovation and are constantly pushing the boundaries of what is possible, to provide you with the latest and most advanced solutions.

For 25 years DRT has designed Professional Grade Software-Defined Radios (SDRs) utilized around the world to support functions ranging from test and measurements to radio frequency (RF) signals analysis. All DRT systems use the latest digital signal processing (DSP), RF, and microprocessor technology to provide state-of-the-art capabilities.

We identify and understand the needs of our technical partners

We provide the best price-performance value in the market

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ST. LOUIS, 20 Dec. 2008. The Boeing Company has completed its acquisition of Digital Receiver Technology Inc. (DRT), a Germantown, Md.-based company that develops wireless surveillance products for government customers.

DRT's digital signal processing products, such as wireless receivers and transceivers, are used by U.S. intelligence customers, the Department of Defense and the Department of Homeland Security to collect signals intelligence and threat warnings. DRT has approximately 370 employees, with the majority located in Germantown. The acquisition, announced Nov. 14, 2008, is part of Boeing's strategy to expand its presence in the growing intelligence market.

ST. LOUIS, Nov. 14, 2008 -- The Boeing Company [NYSE: BA] today announced an agreement to acquire Digital Receiver Technology, Inc. (DRT), a Germantown, Md.-based company that develops hardware and software products for wireless surveillance and tracking equipment for federal government and law enforcement customers.

DRT's digital signal processing products, such as wireless receivers and transceivers, are used by U.S. intelligence customers, the Department of Defense and the Department of Homeland Security to collect signal intelligence and threat warnings. DRT has approximately 370 employees, with the majority located in Germantown.

"This acquisition is another move in our strategy to expand our presence in the growing intelligence market," said Jim Albaugh, president and CEO of Boeing Integrated Defense Systems. "With DRT on our Boeing team, we have expanded our ability to offer military and law enforcement customers improved tools for gathering, analyzing and sharing intelligence."

Terms of the transaction were not disclosed. Once acquired, DRT will operate within Boeing Integrated Defense Systems' Network & Space Systems unit. The transaction is anticipated to close by the end of the year.

The Enersound R-120 is a 20-channel professional FM receiver specifically designed for wireless multi-language simultaneous interpretation (also called simultaneous translation) and multi-channel assistive listening applications. The Enersound R-120 receiver is ideal for all kinds of conferences and executive meetings. It is the equipment preferred by simultaneous translation equipment rental companies, providers of audiovisual equipment, houses of worship, governmental entities, travel and tourism, conference venues and interpreters. It is compatible with most FM systems currently on the market that operate on the 72-76 MHz frequency band. Its multiple features were designed to save time in this highly demanding business. Its attractive design, innovative technical specifications, and unique versatility make it the leading product in its field. The R-120 receiver has a digital LCD display with channel, low battery and volume level indicators. It also features a channel lock function. It is compatible with stereo earphones.

In any conference or event with hundreds of receivers, there is no time to deal with interferences that may require several hours to reprogram each of the devices. There is nothing like the simplicity of the Enersound R-120 receiver! By pressing a single button you can switch frequencies that are strategically allocated.

Q: What is the difference between a true multichannel receiver like the R120 and receivers with seek-button channel selection?

A: True multichannel receivers like the R120 allow the user to easily select the desired channel (for example the desired language in a multi-language event) by pressing the channel buttons and see their selection on the LCD screen. These receivers are ideal for language interpretation and assistive listening as they are fully flexible allowing users to change the channel at any time. Receivers with seek-button channel selection do not allow the user to easily select the desired channel since they do not have visible channel buttons. They do not feature a visual indicator of the selected channel either. These receivers are designed to be individually preprogrammed by the operator utilizing an internal seek button before the start of the event, as they are single-channel programmable receivers.

Q: Can the R120 receiver be used with multiple transmitters in the same room?

A: Yes. The R120 can be used with multiple transmitters. The user can switch among the various channels to listen to the different languages or audio programs.

Q: Does the R120 receiver automatically translates from one language into another one?

A: No, the R120 only reproduces the audio from the voice of a human interpreter that is transmitted through an FM transmitter.

The SLXD5 Single-Channel Portable Digital Wireless Receiver packs the rich features of an SLXD Digital Wireless Receiver into a slim, portable package. Featuring pristine 24-bit digital audio clarity, efficient long-range UHF transmission and easy-to-use setup features, the SLXD5 is at home on top of your camera or in an audio bag. Scan and deploy frequencies to a compatible SLXD wireless transmitter with IR sync, or coordinate and monitor large channel configurations with many sources using Multi-Mic Mode. A full suite of optional rechargeability accessories enables wireless excellence, wherever required, and the bright OLED screen displays battery life in hours and minutes when used with the optional SB903 Rechargeable Lithium-Ion batteries. Includes SLXD5 Portable Receiver, a pair of AA alkaline batteries, a non-conductive cold shoe mount adapter and a zippered carrying pouch.

This paper introduces the basics of designing a digital radio receiver. With many new advances in data converter and radio technology, complex receiver design has been greatly simplified. This paper attempts to explain how to calculate sensitivity and selectivity of such a receiver. It is not by any means an exhaustive exposition, but is instead a primer on many of the techniques and calculations involved in such designs.

Many advances in radio design and architecture are now allowing for rapid changes in the field of radio design. These changes allow reduction of size, cost, complexity and improve manufacturing by using digital components to replace unreliable and in-accurate analog components. For this to happen, many advances in semiconductor design and fabrication were required and have come to fruition over the last few years. Some of these advances include better integrated mixers, LNA, improved SAW filters, lower cost high performance ADCs and programmable digital tuners and filters. This article summarizes the design issues with and the interfacing of these devices into complete radio systems.

An important point to understand is that a digital receiver is not the same thing as digital radio(modulation). In fact, a digital receiver will do an excellent job at receiving any analog signal such as AM or FM. Digital receivers can be used to receive any type of modulation including any analog or digital modulation standards. Furthermore, since the core of the digital processor is a digital signal processor (DSP), this allows many aspects of the entire radio receiver itself be controlled through software. As such, these DSPs can be reprogrammed with upgrades or new features based on customer segmentation, all using the same hardware. However, this is a complete discussion in itself and not the focus of this article.

There are two basic types of radios under discussion. The first is called a single-carrier and the second a multi-carrier receiver Their name implies the obvious, however their function may not be fully clear. The single carrier receiver is a traditional radio receiver deriving selectivity in the analog filters of the IF stages. The multi-carrier receiver processes all signals within the band with a single rf/if analog strip and derives selectivity within the digital filters that follow the analog to digital converter. The benefit of such a receiver is that in applications with multiple receivers tuned to different frequencies within the same band can achieve smaller system designs and reduced cost due to eliminated redundant circuits. A typical application is a cellular/wireless local loop basestation. Another application might be surveillance receivers that typically use scanners to monitor multiple frequencies. This applications allows simultaneous monitoring of many frequencies without the need for sequential scanning.

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