GTX Series

GTX Series
GTX Series
Ultra-Wideband (UWB) Wireless Microphone System
An Audio-Technica Company
1
GTX Series
Professional Freedom
GTX Series Ultra-Wideband (UWB) Wireless Microphone System
After seven years of dedicated research and development, Alteros, an Audio-Technica
The GTX Series provides professional-quality wireless without the need to coordinate
company, presents the GTX Series Ultra-Wideband (UWB) Wireless Microphone
frequencies and without causing interference or creating intermodulation products.
System, a professional broadcast system for the studio and beyond. Operating in the
The completely digital UWB pulse technology allows you to operate without a license,
6–10 GHz range, well beyond the volatile TV bands, the feature-rich GTX Series offers
database registration or STAs in a portion of the RF spectrum that’s not subject
reliable, interference-free performance, with up to 24 simultaneous channels, that you
to overcrowding or FCC repacking. And since the GTX Series emits less intentional
can depend on today and in the future.
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.
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GTX32
Why GTX Series?
GTX24
The Alteros GTX Series immediately solves the urgent problem of how
to operate wirelessly in an ever-shrinking spectrum, but that’s far from
its only technical achievement.
The system is equipped with a slew of features that make it easy to set up and use,
including several industry firsts in its user interface and control functions — features that
make it superior to any wireless microphone system currently available on the market.
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GTX3224
Features
• Low, “real-time” latency (< 3 ms) suitable for demanding
professional environments
• 24-channel simultaneous operation
• 24-bit/48 kHz professional audio performance, with no analog
companding during transmission and full-frequency response
(20–20,000 Hz) for excellent sound quality
• Excellent dynamic range
• A real-time battery gauge on the GTX3224 control unit’s GUI
displays the operational time left for each transmitter and allows
user to set custom “battery level alerts”
• Optional microphone with in-line talkback switch eliminates the need for
a separate wired talkback box, allowing talent to easily speak to production
people or use the talkback function as a momentary “cough switch”
• Transmitter gain can be set via GUI controls on the GTX3224 or by
the user on the GTX24 body-pack transmitter (settings are automatically
updated and displayed on each)
• Each system can be set to operate on a unique system ID. This prevents
accidental reception and audio output between systems set up in two
different locations/studios
• A video sync input on the GTX3224 allows black burst and word clock to
work with a patented clock sync method to synchronize the GTX Series
directly to the house clock. The system maintains a perfect match throughout
the facility for the entire audio chain, including over-the-air sync from every
GTX24 transmitter. The system also has an accurate internal clock which
automatically takes over and syncs the system should the house clock be lost
• MADI, Dante™ and AES67 outputs are available for easy connection to any
standard MADI and network audio used in studio, remote or install/theater
settings for multiplatform operation. The outputs can be used simultaneously
­— the user does not have to choose which format to install or use
• The system features a fiber output for long-distance fiber runs
• The GTX3224 includes a 7" touchscreen GUI for easy access to system
settings, monitoring tools, performance reports, and other controls
• The GTX3224 is equipped with an Ethernet port for remote monitor and
control functions (available upon future rerelease of the GTX Series; unique,
powerful monitor and control functions are currently available via RS232 port)
• The powerful remote control/logger tool operates on a PC or computer
network, providing remote monitoring and control of the system, including
a timestamped event logger that can track and record the performance
of every GTX32 and GTX24 for up to one month
• GTX3224’s headphone output with volume control allows you to
monitor any channel
• Two entirely separate, fully redundant AC power supplies (with
corresponding indicator LEDs) ensure the GTX3224’s continued
operation even if one of the power supplies is lost
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2.5 ns
The Advantages
of UWB
doesn’t generate traditional waves, so there’s no chance of constructive or
The Pulse Is the Signal – No Other
Information Is Embedded in the Pulse
destructive interference, and no frequency coordination is required.
The system is controlled via a custom TDMA scheme and patented clock sync and
The GTX Series transmits true-digital, no-carrier UWB pulses. The system
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 shortduration 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.
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No Modulation =
No Coordination Needed
It’s easy to see the advantage of a wireless system that keeps you free from the
Typically, the coordination of an event starts weeks in advance, with many hours of
spectrum crunch. An additional layer of benefit is the freeing of 24 channels of RF
work required to examine and readjust the frequencies in use. This activity may even
that do not require coordination or consideration in the “RF mix.” Today’s digital and
continue during the event due to some unexpected interference that adversely
analog systems typically require very careful frequency coordination in order to
affects the entire plan. The UWB method employed by the GTX Series is quick (it
operate multiple channels simultaneously in the same studio, or in room-to-room,
takes a matter of seconds to set an individual channel – no calculation required)
studio-to-studio, or theater-to-theater scenarios. Any large professional event requires
and inexpensive (anyone can set the channel as there is no special knowledge
that an experienced RF coordinator be on hand to examine, assign and monitor the
required and no coordination needed). Once the GTX Series is set up to work with
frequencies of operation for the various pieces of gear. Each traditional (carrier-
a single channel, it is likewise ready to operate with all 24 channels – no additional
based) wireless microphone channel added to the mix requires an entirely new
time, effort or expense is required to coordinate the extra channels.
calculation for the event’s frequency coordination matrix in order to keep the signal
waves from interfering with one another (much like ripples from two stones thrown
Additionally, the shorter-range nature of this particular UWB implementation means
into a body of water). The more channels that are in use, the more complex the
that the multiple transmitters in use in studio-to-studio settings will not interfere
situation becomes. Throw one stone into the pool, and you see some waves. Throw
with one another. When used within typically constructed broadcast studios, you
two in and it gets more complicated. Throw 16 in and it becomes almost impossible
do not need to worry about coordinating all the transmitters in the building as you
to distinguish one stone’s waves from another’s.
would with typical analog or digital systems.
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Traditional RF wireless rack space equipment
for 24 simultaneous channels
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 microphone cables or extra equipment
in order to operate.
GTX Series rack space equipment
for 24 simultaneous channels
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No Extra Filters or Antennas Required
boxes, connection of custom or expensive filters (and the very expensive cables used
The GTX Series eliminates the need for extra support equipment. The use of custom
for connection), building and running of expensive microphone cables, allocation of
cavity filters and additional filtered/tuned antennas has become standard practice
space and power to large racks of receivers, antenna distribution gear, and breakouts
for high-profile professional events and installations. These “extras” are expensive to
for digital output devices (such as MADI or Dante™) if interfacing with a network/
purchase (or lease), expensive and time-consuming to set up, and require specialized
protocol system. Such a system takes months to install, debug and qualify. With the
experts and significant time to deploy. The GTX Series requires none of these extra
GTX Series, it is possible to completely place, connect, debug and perform 100%
filters and antennas in order to operate, saving you considerable time and money.
coverage “commissioning” in a few hours . That means 24 channels of high-fidelity,
Space Saver
reliable wireless in hours rather than months.
Takes up only 3U rack space for 24 channels of on-air audio, plus another 24 channels
Powerful, Easy-To-Use and Affordable
of talkback audio and 8 “group assignment channels.” Traditional analog and digital
This new technology product delivers buying power and future-proof cost savings.
wireless systems generally require 1U of rack space for every one or two audio
The cost per channel price is comparable to other professional wireless systems that
channels. In a control room where cabling, space, power and heat are all important
are currently on the market. Additional cost savings are found in the quick setup,
considerations, the GTX Series represents a dramatic improvement over any system
low-cost Cat 5, and elimination of expensive frequency coordination plans. Of
on the market.
course, there is also a significant cost savings in purchasing a product that operates
Works with Standard Cat 5 Cable
in spectrum immune to the risk of future spectrum policy shifts and shrinkage.
Use up to 1,000 feet of standard Cat 5 cable. The GTX32 transceivers connect
The GTX Series components are sold separately so that a system can be tailored
to the GTX3224 control unit via standard shielded Cat 5 cable. This cable is readily
to the specific needs and considerations of each implementation. Purchase a single,
available, and indeed is already used throughout most facilities, broadcast or not.
full-featured GTX3224 control unit, up to 32 GTX32 transceivers, as needed, to cover
The GTX Series system can utilize runs of up to 1,000 feet with Cat 5 cable, compared
the specific configuration of the space, and up to 24 GTX24 transmitters for use in
to the 300 or 500 feet that is typical with the microphone cable currently used in most
the space. That is all! (Note – the GTX24 uses a LEMO connector. Audio-Technica
systems. Plus, traditional microphone cable is expensive and much more difficult to
microphones are available to purchase to operate with the GTX24, if desired.)
use than Cat 5.
Quick and Easy Setup
The GTX Series gives you the ability to set up and confirm operation of 32 transceivers
YOU DON’T NEED TO PURCHASE
ANYTHING ELSE TO OPERATE
and 24 transmitters in a few hours. The importance of this cannot be overstated.
No custom cables. No cavity filters. No output modules.
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
9
Specifications*
Core System Operating Characteristics
GTX24 (inherent to body-pack)
Operating Method
UWB OOK
Self Noise @ 0 dB gain
-111 dBA
Center frequency
6.500 GHz
Self Noise @ 20 dB gain
-106 dBA
Simultaneous Receive Points
32
Sensitivity @ 0 dB gain
-44 dBV
Simultaneous Transmitters
24
Sensitivity @ 20 dB gain
-23 dBV
Audio Dynamic Range
24 bits
Dynamic Range
111 dB (A-weighted, typical)
Frequency Response
20 Hz – 20 kHz
SNR @ 0 dB gain
67 dBA
Latency
<3 ms
SNR @ 20 dB gain
82 dBA
Audio Interface
MADI/Dante /AES 67
Maximum Input Level (5% THD)
4.8 dBV
External Control Interface
USB/Ethernet
Total Harmonic Distortion
<0.06% (-40 dBV input level)
User Interface
Touchscreen GUI
Operating Frequency Range
6250 MHz – 6750 MHz
Range (single RP line of sight)
90 feet
Tx Output Power
2 nW average
™
Modulationnone
Overall System
Dynamic Range
>109 dB (A-weighted, typical)
Total Harmonic Distortion
<0.06% (-40 dBV input level)
* Specifications are subject to change without notice.
Dante™ is a trademark of Audinate Pty Ltd.
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Emissions Designator
500 MN1W
Battery
Two 1.5V AA (not included)
Battery Life
6 hours (alkaline)
Depending on battery type and use pattern
GTX24 w/AT899cL4 or AT899cL4SW mic
GTX3224
Self-Noise @ 0 dB gain
-109 dBA
Frequency Response
Self-Noise @ 20 dB gain
-93 dBA
Input/Output Connections
Sensitivity @ 0 dB gain
-48 dBV
Sensitivity @ 20 dB gain
-28 dBV
Dante RJ45 (x2)
Dynamic Range
109 dB (A-weighted, typical)
12 V, RJ45 (x32)
SNR @ 0 dB gain
61 dBA
Black Burst (HD/SD, bi-level/tri-level) BNC
SNR @ 20 dB gain
65 dBA
Word Clock
Frequency Response
20 Hz – 20 KHz
Headphone/Monitor Out
Impedance
250 ohms
(@ 33 ohm load)
DC current
1.7 mA
Total Harmonic Distortion
<0.1%
Battery
Two 1.5V AA (not included)
Noise
-90 dBV
Battery Life
6 hours (alkaline)
Maximum Output Power 200 mW
Depending on battery type and use pattern
Power (Redundant AC Supply)
110-240 V AC, 50-50 Hz, 250 W max (x2)
Cable
IEC (x2)
MADI
™
Receivers
20 Hz – 20 KHz
75 ohm BNC to coax (x2), singlemode fiber (x2)
BNC
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An Audio-Technica Company
©2017 Alteros, Inc.
Form No. 0484-0001-01
www.alteros.tech
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