Lectrosonics HHAA1 User Manual
HHa
Handheld Transmitter
INSTRUCTION MANUAL
Digital Hybrid Wireless
US Patent 7,225,135
®
Rio Rancho, NM, USA
www.lectrosonics.com
HHa
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LECTROSONICS, INC.
Table of Contents
General Technical Description .............................................4
Microphone Capsules: ..........................................................6
Mechanical Assembly ...........................................................6
Battery Installation ................................................................7
IR Sync ...................................................................................7
Control Panel .........................................................................7
Setup and Adjustments ........................................................7
Powering On ........................................................................7
Powering Off ........................................................................8
Standby Mode ......................................................................8
Power Menu .........................................................................8
Battery Condition .................................................................8
Navigating Menus and Screens ...........................................8
Input Gain Adjustment ........................................................10
Side Button Functions ........................................................11
Mic Capsule Adjustments ...................................................12
(EXPERT LEVEL ADJUSTMENT) .....................................12
Firmware Updates ...............................................................13
Parts and Accessories ........................................................14
Troubleshooting ...................................................................15
Specifications ......................................................................16
Service and Repair ..............................................................17
Returning Units for Repair .................................................17
Wideband Hand Held Transmitter
Consumer Alert for US Users - FCC Order DA 10-92
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone
system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at
a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device.
Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules
are subject to change. For more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s
wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones. To operate wireless microphone systems at power
greater than 50mW, you must qualify as a Part 74 user and be licensed. If you qualify and wish to apply for a license go to:
http://www.fcc.gov/Forms/Form601/601.html
Rio Rancho, NM
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General Technical Description
Introduction
The HHa handheld transmitter uses state-of-the-art
Digital Hybrid Wireless® wireless technology, selectable output power and a versatile microphone capsule
mounting system to meet the needs of audio professionals and vocalists.
The compandor-free Digital Hybrid audio chain preserves the quality of the selected microphone capsule
and delivers it to the sound and recording system
without coloration. This superb audio performance and
highly reliable RF transmission makes it ideally suited
for high end stage and studio production.
Digital Signal Processor
The DSP encodes the digitized audio from the A-D
converter and adds an ultrasonic pilot tone to control
the receiver’s squelch in systems that use pilot tone. It
also controls the input limiter and audio metering.
Compatibility Modes
The transmitter was designed to operate with Lectrosonics Digital Hybrid Wireless® receivers and will
yield the best performance when doing so. Due to
the flexibility of digital signal processing, however, the
transmitter is also able to operate with Lectrosonics
200 Series, Lectrosonics 100 Series, IFB and certain
non-Lectrosonics analog receivers in special compatibility modes. (Contact the Lectrosonics Sales Department for a complete list of compatible receivers.)
Digital Hybrid Wireless® Technology
All wireless links suffer from channel noise to some
degree and all wireless microphone systems seek to
minimize the impact of that noise on the desired signal.
Conventional analog systems use compandors to
increase the signal to noise ratio, at the cost of distortion artifacts. Wholly digital systems defeat the noise
by sending the audio information in digital form, at
the cost of some combination of power, bandwidth or
channel count.
The Lectrosonics Digital Hybrid Wireless® system overcomes channel noise by digitally encoding the audio
in the transmitter and decoding it in the receiver, yet
still sending the encoded information via an analog FM
wireless link. This proprietary algorithm is not a digital
implementation of an analog compandor. Instead, it
is a technique that can be accomplished only in the
digital domain, even though the inputs and outputs are
analog signals.
Because it uses an analog FM link, the system enjoys
all the benefits of conventional FM wireless systems,
such as excellent range, efficient use of RF spectrum,
and long battery life. However, unlike conventional FM
systems, the design has eliminated the analog compandor and its artifacts.
Wide Deviation
±75 kHz deviation is used in the Digital Hybrid and 200
Series compatibility modes to dramatically improve
the capture ratio, signal to noise ratio and dynamic
range of the wireless system. This, in conjunction with
accurate input gain adjustment, produces outstanding
audio quality that rivals a hard wired connection.
Interface
Shunt
Limiter
Bias 5V
MENU/SEL
Mic
capsule
4
Input
Amp
Digital
BACK
MUTE
POWER
Bicolor
Modulation
LEDs
Phantom
Power
Pot
LCD
Audio
Level
Hi.Lo
Pass
Filter
+7V
Audio
Microprocessor
Control Panel
A-D
Converter
11001001
Digital Signal Processor
D-A
Converter
11001001
Reference
Crystal
Phase Locked Loop
Reference
Crystal
Encoded Audio
and Pilot Tone
3 V
Battery
Filter
Amp
Switching
Power
Supply
Variable
Switching
Power
Supply
Voltage
Controlled
Oscillator
Final
Amplifier
LECTROSONICS, INC.
Wideband Hand Held Transmitter
Pilot Tone Squelch
The benefit of the pilot tone squelch system is that the
associated receiver will remain muted until it receives
the pilot tone from the matching transmitter, even if a
strong RF signal is present on the carrier frequency
of the system. All Digital Hybrid Wireless® transmitters
use one of 256 different ultrasonic tones between 25
and 32 kHz in each standard frequency block to operate the receiver squelch.
The HHa is a wideband design that tunes across
three standard blocks (up to 76 MHz). The pilot tone
frequency is determined by the selected operating
frequency in 100 kHz steps. In other words, the same
pilot tone is used for all four frequencies within each
100 kHz step of the tuning range. This preserves compatibility with earlier Digital Hybrid products that tune
across a single frequency block (25.6 MHz).
Input Gain Range and Limiter
45 dB range of input gain adjustment allows gain
settings to accurately match the user’s voice and the
varying sensitivity of different microphone capsules. A
DSP-controlled analog audio limiter is employed before the A-D converter. The limiter has a range of more
than 30 dB for excellent overload protection. A dual release envelope makes the limiter acoustically transparent while maintaining low distortion. It can be thought
of as two limiters in series, a fast attack and release
limiter followed by a slow attack and release limiter.
The limiter recovers quickly from brief transients, with
no audible side effects, and also recovers slowly from
sustained high levels to keep audio distortion low while
preserving short term dynamics.
Long Battery Life
Switching power supplies throughout the design allow
over 5 hours of operation using two alkaline AA batteries. Lithium batteries will provide over 8 hours of
operation. The battery compartment and contacts are
designed to prevent “rattle” as the unit is handled.
Menu-Driven Control
A high-resolution LCD and control panel with membrane switches provide access to the menu-driven
setup. Transmitter RF power, high-pass filter, frequency
selection, backlight timeout, mute or talkback functions
and tuning modes are easily accessed.
Wideband Tuning Range
The transmitter can tune across band of up to 76 MHz
in either 100 kHz or 25 kHz steps.
Frequency Selection
Operating frequency is normally selected using a
receiver or analyzer to assess signals in the local environment to avoid interference. Once an interferencefree frequency is identified, the transmitter frequency is
set to match the receiver.
The LCD on the transmitter displays frequency in MHz
and with a two character hex code that is used on
most Lectrosonics receivers.
Antenna
A newly designed helical antenna allows the transmitter to be held in any position, since the user’s hands
have little or no effect on the RF output power.
Microphone Capsules
The transmitter is available from Lectrosonics with
the HHC and HHVMC cardioid condenser capsules.
Capsules from several other manufacturers are also
available for use with the HH: those with a 1.25” x 28
thread pitch and three contact rings. Condenser or
dynamic microphone heads can be used with the HH,
depending on the user’s preference or the application.
IR (infrared) Sync
An IR Sync Port is used for quick setup with receivers
that offer this feature. Settings for frequency, step size
and compatibility mode are transferred from receiver to
transmitter via the IR ports.
Side Button Functions
A programmable switch on the side of the housing can
be configured as a mute/cough switch, to provide a
talkback function, a power switch, or be disabled.
The talkback function provides a communication
channel when used with a receiver equipped with this
feature, such as a Venue Wideband receiver with appropriate firmware. When pressed and held in, the side
switch re-directs the audio output to a different audio
channel on the receiver. As soon as the switch is released, audio is returned to the program channel.
The talkback function works only in the Digital Hybrid
compatibility mode.
USB Port for Firmware Updates
Firmware updates are enabled by simply downloading
a file and utility program from the Lectrosonics web
site, connecting the transmitter to a computer via the
USB port and running the program.
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A mic capsule is
threaded onto the body
of the transmitter in the
direction shown.
Do not overtighten it.
The threaded interface is a 1.25”
diameter opening with 28 threads
per inch and three contact rings
Microphone Capsules:
Lectrosonics offers two types of capsules. The HHC is
the standard capsule and the HHVMC is the Variable
Mic Capsule which includes adjustments for Bass,
Midrange and T reble.
Mechanical Assembly
The lower housing opens by rotating
it in the direction shown. After the
threads are disengaged, pull the
housing downward until it engages
the detent that holds it open.
Do not touch the contacts between the mic capsule
and transmitter body. When necessary, the contacts
can be cleaned with a cotton swab and alcohol.
HHC Lectrosonics
cardioid electret
HHVMC Lectrosonics cardioid
electret with VariMic preamp
Along with these two models from Lectrosonics, a
variety of different capsules with a common thread
and electrical interface are available from the major
microphone manufacturers.
A list of compatible capsules is on the website at www.
lectrosonics.com listed on the HH transmitter page.
*All product names are trademarks of their respective
owners, which are in no way affiliated with Lectrosonics.
Capsule Installation
Capsules are attached with a right-hand thread.
To remove the windscreen from the mic capsule,
line up the blue wrench (included with the capsule
head) with the flat notches on the lower threaded area
of the mic capsule.
Align flats on the wrench with flats on the capsule.
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LECTROSONICS, INC.
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