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Hand Held Transmitter

Rio Rancho, NM

3

General Technical Description

Introduction

The HH handheld transmitter uses state-of-the-art 

Digital Hybrid Wireless

® 

wireless technology, select-

able output power and a versatile microphone capsule 

mounting system to meet the needs of audio profes-

sionals and vocalists.
The compandor-free Digital Hybrid audio chain pre-

serves 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 Lec-

trosonics 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 compat-

ibility modes.  (Contact the Lectrosonics Sales Depart-

ment for a complete list of compatible receivers.)

Digital Hybrid 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 distor-

tion 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 (also 

called Digital Hybrid) overcomes channel noise by 

digitally encoding the audio in the transmitter and de-

coding it in the receiver, yet still sending the encoded 

information via an analog FM wireless link. 
This proprietary algorithm is not a digital implementa-

tion 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 Digital Hybrid 

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 Digital Hybrid has elimi-

nated 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 ac-

curate input gain adjustment, produces dynamic range 

and signal to noise ratio.

Mic 

capsule

Bias 5V

+7V

Input 

Amp

Interface

Shunt 

Limiter

MENU/SEL

BACK

MUTE

POWER

Reference 

Crystal

Reference 

Crystal

3 V 

Battery

Variable 

Switching 

Power 

Supply

Hi.Lo 

Pass 

Filter

Digital 

Pot

Audio 

Level

Phantom 

Power

Audio

A-D 

Converter

11001001

D-A 

Converter

11001001

Control P

anel

Microprocessor

Voltage 

Controlled 

Oscillator

Final 

Amplifier

50 

Ohms

Isolator

Filter 

Amp

Encoded Audio 

and Pilot Tone

Bicolor 

Modulation 

LEDs

Switching 

Power 

Supply

Digital Signal Processor

Phase Locked Loop

LCD

Summary of Contents for Handheld Transmitter

Page 1: ...Digital Hybrid Wireless Technology US Patent 7 225 135 Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date INSTRUCTION MANUAL HH Handheld Transmitter ...

Page 2: ...8 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 Table of Contents General Technical Description 3 Microphone Capsules 5 Me...

Page 3: ... to noise ratio at the cost of distor tion 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 also called Digital Hybrid overcomes channel noise by digitally encoding the audio in the transmitter and de coding it in the receiver yet sti...

Page 4: ...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 Membrane switches on the control panel select 256 frequencies in 100 kHz steps or 1024 frequencies in 25 kHz steps over a 25 6 MHz range Output Isolator The output circuit includes a special RF device called an isolator Its purpos...

Page 5: ... list of compatible capsules is on the website at www lectrosonics com listed on the HH transmitter page 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 All product names are trademarks of their respective owners which are in no way affiliated with Lectrosonics Capsule Installation Capsules are attache...

Page 6: ...iggered by a switch on the receiver The LCD on the transmitter will display a message confirming that the settings were success fully transferred or an error message that identifies the problem that occurred IR Sync COMPAT Mismatch IR Sync OK Control Panel Six membrane switches on the control panel are used to set up the transmitter by navigating the menus on the LCD and selecting the desired valu...

Page 7: ...Off Press and hold the Power Button or the side button if it is configured for turning the power on and off for several seconds and observe the countdown on the LCD The countdown on the LCD will progress from 3 to 1 and the power will then be turned off This can be done from any menu or screen Powering Off 1 NOTE If the Power Button is released before the countdown is completed the unit will remai...

Page 8: ... The roll off frequency is normally adjusted by ear to suit personal preferences Compat The HH can be used with earlier Lectrosonics wireless and IFB systems and systems from other manufactur ers by selecting the correct Compatibility Mode The receiver must be set to the same mode Compat Tuning TxPower Phase Compat Hybrid The available modes are as follows Hybrid Digital Hybrid receivers Mode 3 ot...

Page 9: ...l the 20 dB LED starts to flicker red and the 10 dB glows green 5 Once the audio gain has been set the signal can be sent through the sound system for overall level adjustments monitor settings etc To do this the unit must be set to transmit see Powering On and Off and the Standby Mode on page 7 NOTE Full modulation is achieved when the 20 LED first turns red 30 dB of clean limiting is available a...

Page 10: ... audio output to a different audio channel on the receiver As soon as the switch is released audio is returned to the program channel NOTE The Talkback function is only available in the Digital Hybrid compatibility mode An error message will appear if Talkback is selected while in another mode Button Power Power turns the power on and off Hold the button in until the count down sequence from 3 to ...

Page 11: ...ly alter the gain and tonal quality of the microphone and are to be used only in special circumstances Caution Always make the final decision about sound quality with the windscreen in place Remove the windscreen using the supplied wrench Align flats on the wrench with flats on the capsule Attenuator Adjustment The HHC HHVMC heads include an attenuator in the preamp circuitry to provide an additio...

Page 12: ... for use with microphone flags commonly used in ENG for network or station ID to keep the flag from covering the side switch and LCD HH2SEN Adapter Adapts Sennheiser G2 G3 and 2000 Series micro phone capsule heads to the HH transmitter Transmitter interface Capsule interface HHA Adapter by Ambient Recording Adapts Neumann KK104 and KK105 and Sennheiser cap sules for the 5000 Series wire less with ...

Page 13: ...S SOUND 1 Receiver audio is muted Unmute receiver 2 Receiver audio output levels set too low 3 Receiver audio output is disconnected or cable defective or miswired 4 Sound system or recorder input level is turned down DISTORTED SOUND 1 HH Audio Gain set too high Speak or sing into the HH and check the Audio Level LEDs Audio Level bar graph in the HH LCD and corresponding indicators on the receiver...

Page 14: ...low carrier Operating temperature range 30 C to 60 C Input compressor Dual envelope compressor 30 dB range Audio Gain range 0 to 45 dB menu selectable Modulation indicators Dual bicolor LEDs indicate modulation of 20 10 0 and 10 dB referenced to full modulation LCD bar graph indicator Frequency response 40 Hz to 20 kHz 1dB Low frequency roll off 3 dB selectable 35 50 70 100 125 Hz 36 dB octave var...

Page 15: ...of warranty repairs Returning Units for Repair For timely service please follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by letter or by phone We need to know the nature of the problem the model number and the serial number of the equipment We also need a phone number where you can be reached 8 A M to 4 P M U S Mountain Standard Time B After r...

Page 16: ...w item Lectrosonics Inc will pay for the cost of returning your equipment to you This warranty applies only to items returned to Lectrosonics Inc or an authorized dealer shipping costs prepaid within one year from the date of purchase This Limited Warranty is governed by the laws of the State of New Mexico It states the entire liablility of Lectrosonics Inc and the entire remedy of the purchaser f...

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