AWT-1 Transmitter - Audio Wireless

AWT-1 Transmitter
Territorial freedom, with switching bandwidth up to 120MHz
for crews, camera operators and sound recordists

Territorial freedom and operational convenience,
combined with exemplary audio quality, are the hallmarks
of Audio Wireless systems. The AWT transmitter offers
the utmost flexibility for crews, operators and sound
recordists, whether working internationally or simply
under challenging RF conditions.
Its out-and-out practicality is reflected as much by its extra-wide
frequency-switching bandwidth – up to 120MHz – as by its unique
battery compartment. The unit's single AA battery is held in place by
a captive, easy-twist compartment cover, with a click-stop
mechanism. This is simple and intuitive in operation enabling quick,
reliable battery changes to be made by feel alone – invaluable when
working under pressure.
Product features
• Switching bandwidth up to 120MHz
• Tunable in 25kHz steps
• Switchable RF output power
• Top-level flexibility for international working
• Compact design, with rugged all-metal construction
• 1 x AA alkaline provides up to 5 hours operating time or lithium
battery for longer
• Easy-twist battery compartment cover,
with click-stop reassurance
• External powering with adaptor leads
• Unique mic-pre design maximises audio quality
• Input sensitivity from -50dBu to 0dBu before limiting
• Switchable low-cut filter
• Easy operation by backlit LCD with programmable functions
• Battery-level indication and transmitted “low batt” warning system
• Pilot-tone carrier
• Reliable, professional-grade connectors
Quality performance worldwide
The Audio Wireless AWT transmitter uses a unique design of lownoise
microphone preamplifier – its AGC-Limiter is coupled with a
low-noise VCO-PLL circuit, to produce the highest possible
transmission quality. This design acknowledges the over-crowded
spectrum and non-harmonised radio microphone allocations
prevalent in many territories, with the wide frequency-switching
bandwidth maximising its agility for worldwide, on-demand
production. The RF transmission power can also be adjusted to
adapt to regional regulations, and to increase battery life.
Informative displays
The AWT offers easy adjustment of the audio input level via the multifunction
LCD display, as well as traditional easily visible LED display
at the top panel (-10 and 0dB) indicating the audio level and allowing
repeatable levels to be set. Continuous AF metering is displayed on
the LCD. The AWT includes a soft audio limiting circuit, with a user-
adjustable gain threshold to give a wide dynamic range. This
advanced design enables the limiter to be used as an automatic
level control, without the pumping effect usually associated with
audio AGC, and it can also be used as a ‘distortionless’ emergency
limiter to prevent over-modulation. Additional front-end protection is
provided by an adjustable low-cut filter (set via the
LCD), which reduces wind noise and counteracts
close-microphone effects. Battery status is
displayed on the transmitter’s LCD, and can be seen
at a glance via the battery-monitoring LED indicator
on the top panel.
The system uses a pilot-tone carrier to operate the
matching receiver’s squelch. This enables the
receiver to remain muted until it receives the pilot
tone from the matching transmitter. An option on the
display menu also enables the user to lock the
system against accidental adjustment.
For long-term reliability, the AWT uses a very high
quality 6-pin Lemo mic input connector and a
miniature SMA RF antenna connector. Dedicated
audio input cables are available to connect mic- or
line-level signals to the transmitter.
The AWT’s unique design, together with its overall
strength and durability, is focused on withstanding
the heavy demands of day-in-day-out location use,
while its compact, smoothly sculpted case is
comfortable to wear – ideal for situations where
concealment is necessary.

RF Transmission System
Carrier Range 470 to 790MHz
Number of frequencies Switchable in 25 kHz steps
Switching bandwidth up to 120MHz
Modulation System F3EGN
RF output power switchable, typical: 50mW, 30mW and 10mW
RF output connector SMA 50 Ohms
AF characteristics
AF sensitivity 0dBu to -50dBu adjustable in 1dB steps
Compander system Audio Wireless UNR (Unique Noise Reduction)
System S/N Ratio >100dB
System Frequency Response 60Hz to 20 kHz, ±2dB
System THD

Audio Wireless AWT-1
Transmitter
Switching bandwidth up to
120MHz, for crews,
camera operators
and sound
recordists.
Audio Wireless AWDR-1
Diversity Receiver
Small, true-diversity receiver
for broadcast and location
recording applications,
switchable RF front-end
filtering.
Audio Wireless
Monitoring Receivers
Monitoring mobility for
presenters, directors
and crew, in broadcast
and film, in studio or on
location.
Audio Wireless Ltd
Phoenix 5
Andrew Mitchell Building
Elstree Studios
Shenley Road, Borehamwood
Hertfordshire
WD6 1JG
UK
Telephone: +44 (0)20 8324 2375
www.audiowireless.co.uk
Email: enquiry@audiowireless.co.uk