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GTX Series Ultra-Wideband (UWB) Wireless Microphone System

After years of dedicated research and development, Alteros, an Audio-Technica company, presents the GTX Series Ultra-Wideband (UWB) Wireless Microphone System, a professional broadcast system for the studio and beyond. Operating at 6.5 GHz, well beyond the volatile TV bands, the feature-rich GTX Series offers reliable, interference-free performance, with up to 24 simultaneous channels, that you can depend on today and in the future.

The GTX Series provides professional-quality wireless without the need to coordinate frequencies and without causing interference or creating intermodulation products. The completely digital UWB pulse technology allows you to operate without a license, database registration or STAs in a portion of the RF spectrum that’s not subject to overcrowding or FCC repacking. And since the GTX Series emits less intentional radiation than the typical PC, you don’t have to worry about it interfering with surrounding signals, making it ideal for studio-to-studio operation.

Freedom from coordination, freedom from spectrum grabs, freedom from licensing, fees and registration – and the freedom to operate 24 simultaneous, interference-free channels. That’s GTX Series freedom. That’s professional freedom.

The Advantages
of UWB

The GTX Series transmits true-digital, no-continuous-carrier UWB pulses. The system doesn’t utilize traditional continuous-carrier waves, so there’s no chance of constructive or destructive interference, and no frequency coordination is required.

The Pulse is the Signal - No Other Information Is Embedded in the Pulse

The system is controlled via a custom TDMA scheme and patented clock sync and cable compensation technology through multiple GTX32 transceivers. The GTX32 transceivers coordinate system timing, give permission to GTX24 transmitters to transmit, and perform several layers of data validation and error correction. Each GTX32 transceiver can coordinate, receive and process signals from up to 24 simultaneous GTX24 transmitters. Signal reception is not dependent on phase or wave shape. The system only needs to see a “pulse” at the appropriate time in the TDMA scheme for the signal to be linked and captured.

Each pulse is extremely short, lasting only 2.5 ns. This is an important point because it means that the system is almost always “off.” The system is on (i.e., transmitting a signal) only 1.2% of the time, and off the remaining 98.8% of the time. As a result of this very short duty cycle, the GTX24 body-pack transmitter stays cool, while its signal remains effectively invisible to surrounding equipment. The timed sequence of short-duration pulses also makes the system inherently secure, since a receiver must know exactly when, where and how to “look” for the pulse in order to decode it.

No Modulation = No Coordination Needed

It’s easy to see the advantage of a wireless system that keeps you free from the spectrum crunch. An additional layer of benefit is the freeing of 24 channels of RF that do not require coordination or consideration in the “RF mix.” Today’s digital and analog systems typically require very careful frequency coordination in order to operate multiple channels simultaneously in the same studio, or in room-to-room, studio-to-studio, or theater-to-theater scenarios. Any large professional event requires that an experienced RF coordinator be on hand to examine, assign and monitor the frequencies of operation for the various pieces of gear. Each traditional (continuous-carrier-based) wireless microphone channel added to the mix requires an entirely new calculation for the event’s frequency coordination matrix in order to keep the signal waves from interfering with one another. The more channels that are in use, the more complex the situation becomes.

Typically, the coordination of an event starts weeks in advance, with many hours of work required to examine and readjust the frequencies in use. This activity may even continue during the event due to some unexpected interference that adversely affects the entire plan. The UWB method employed by the GTX Series is quick (it takes a matter of seconds to set an individual channel – no calculation required) and inexpensive (anyone can set the channel as there is no special knowledge required and no coordination needed). Once the GTX Series is set up to work with a single channel, it is likewise ready to operate with all 24 channels – no additional time, effort or expense is required to coordinate the extra channels.

Additionally, the controlled range nature of this particular UWB implementation means that the multiple transmitters in use in studio-to-studio settings will not interfere with one another. When used within typically constructed broadcast studios, you do not need to worry about coordinating all the transmitters in the building as you would with typical analog or digital systems.

Traditional RF
Equipment vs. GTX

Unlike traditional RF systems, the GTX Series sets up easily, doesn’t hog rack space, and doesn’t require expensive cables or extra equipment in order to operate.

No Extra Filters or Equipment Required

The GTX Series eliminates the need for extra support equipment. The use of custom cavity filters and additional filtered/tuned antennas has become standard practice for high-profile professional events and installations. Traditional event and location set-up also depends on deploying custom distribution amplifiers and combiners which are expensive and difficult to change if / when additional channels are needed. These “extras” are expensive to purchase (or lease), expensive and time-consuming to set up, and require specialized experts and significant time to deploy. The GTX Series requires none of these extras in order to operate, saving you considerable time and money, and allowing for future flexibility.

Space Saver

Takes up only 3U rack space for 24 channels of on-air audio, plus another 24 channels of talkback audio and 8 “group assignment channels.” Traditional analog and digital wireless systems generally require 1U of rack space for every one or two audio channels. In a control room where cabling, space, power and heat are all important considerations, the GTX Series represents a dramatic improvement over any system on the market.

Works with Standard Cat 5 Cable

Use up to 1,000 feet of standard Cat 5 cable. The GTX32 transceivers connect to the GTX3224 control unit via standard shielded Cat 5 cable. This cable is readily available, and indeed is already used throughout most facilities, broadcast or not.

The GTX Series system can utilize runs of up to 1,000 feet with Cat 5 cable, compared to the 300 or 500 feet that is typical with the cable currently used in most systems. Plus, traditional cable is expensive and much more difficult to use than Cat 5.

Quick and Easy Setup

The GTX Series gives you the ability to set up and confirm operation of 32 transceivers and 24 transmitters in a few hours. The importance of this cannot be overstated. With most wireless systems currently on the market, designing for their use in a broadcast studio starts months – or even a year – in advance. Careful consideration must be given to frequency coordination, use of accessory antennas and distribution boxes, connection of custom or expensive filters (and the very expensive cables used for connection), building and running of expensive cables, allocation of space and power to large racks of receivers, antenna distribution gear, and breakouts for digital output devices (such as MADI or Dante™) if interfacing with a network/protocol system. Such a system takes months to install, debug and qualify. With the GTX Series, it is possible to completely place, connect, debug and perform 100% coverage “commissioning” in a few hours. That means 24 channels of high-fidelity, reliable wireless in hours rather than months.

Powerful, Easy-To-Use and Affordable

The game-changing technology of the GTX Series provides cost savings now and in the future. Based purely on the purchase price of the components, the cost per channel is comparable to other professional wireless systems currently on the market. But since the system sets up so quickly, utilizes low-cost Cat 5 cable, and doesn’t require any frequency coordination plans, the GTX Series actually provides considerable cost savings. Plus, since it operates in a portion of the spectrum unaffected by shifting regulations, the GTX is a wise investment that will save you the cost of purchasing additional equipment every time the spectrum requirements change.

The GTX Series components are sold separately to provide systems that are tailored to your specific needs. The GTX3224 control unit has inputs for 32 GTX32 transceivers; giving you the power and flexibility to cover even the most complex spaces and workflows.

you don’t need to purchase anything else to operate

No custom cables. No cavity filters. No output modules. No distribution amplifiers. No combiners.


GTX Series Components

GTX3224 Control Unit

The GTX3224 control unit is the primary component of the GTX Series, powering and controlling the system and its outputs. The durable, 3U rack-mount unit features a 7" touchscreen GUI; MADI BNC/fiber, Dante and AES67 digital outputs; headphone output with volume control; 32 transceiver inputs; and two fully independent IEC cable AC input power supplies. Available in 8-channel, 16-channel and 24-channel models with additional channel licenses available via easy firmware upgrade.

GTX24-2 Body-Pack Transmitter

Body-pack transmitter with 2-pin LEMO connector. Transmits true-digital, no-carrier UWB pulses. Equipped with soft-touch controls and powered by two AA batteries. (Compatible with popular broadcast-quality lavalier microphones including Audio-Technica’s AT899cL4 lavalier microphone and AT899cL4SW lavalier microphone with in-line talkback switch, sold separately.)

GTX24-3 Body-Pack Transmitter

Body-pack transmitter with 3-pin LEMO connector. Transmits true-digital, no-carrier UWB pulses. Equipped with soft-touch controls and powered by two AA batteries. (Compatible Audio-Technica’s AT899cL4 lavalier microphone and AT899cL4SW lavalier microphone with in-line talkback switch, sold separately

GTX32 Transceiver

Remote antenna/receiver unit that wirelessly transmits control/sync information for up to 24 GTX24 transmitters. Up to 32 transceivers connect to the GTX3224 control unit via Cat 5 cable, with a proprietary communication protocol enabling cable runs up to 1,000 feet without signal degradation. Transceiver is equipped with both 5/8"-27 and 1/4"-20 mounting threads.

SWX8 – 8-Port Cat 5 Switch

Passive switch for failover and routing.

SWX8C – 8-Port Cat 4 Switch

Active Control switch for failover, routing and control.