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HH/E01

LECTROSONICS, INC.

4

General Technical Description

Introduction

The HH/E01 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 perfor-

mance and highly reliable RF transmission makes it 

ideally suited for high end stage and studio produc-

tion.

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 Lectroson-

ics IFB receivers in special compatibility modes.

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 compan-

dors 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 digi-

tal form, at the cost of some combination of power, 

bandwidth or channel count.
The Lectrosonics Digital Hybrid Wireless

®

 sys-

tem (also called simply Digital Hybrid) 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 imple-

mentation 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 

eliminated the analog compandor and its artifacts.

No Pre-Emphasis/De-Emphasis

The Digital Hybrid design results in a signal-to-noise 

ratio high enough to preclude the need for conventional 

pre-emphasis (HF boost) in the transmitter and de-

emphasis (HF roll off) in the receiver. This eliminates 

the potential for distortion of signals with abundant 

high-frequency information.

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 HH/E01

Page 1: ...Rio Rancho NM USA www lectrosonics com HH E01 Handheld Transmitter Digital Hybrid Wireless Technology US Patent 7 225 135 Fill in for your records Serial Number Purchase Date INSTRUCTION MANUAL ...

Page 2: ...HH E01 LECTROSONICS INC 2 ...

Page 3: ...psule and Battery Installation 6 Control Panel 7 Powering On 7 Powering Off 7 Standby Mode 7 Battery Condition 8 Navigating Menus and Screens 8 About Setting Audio Gain 10 Mute and Talkback Functions 10 Troubleshooting 12 Specifications 13 Service and Repair 14 Returning Units for Repair 14 ...

Page 4: ...by sending the audio information in digi tal form at the cost of some combination of power bandwidth or channel count The Lectrosonics Digital Hybrid Wireless sys tem also called simply Digital Hybrid 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 al...

Page 5: ... 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 purpose is to block radio signals from coming back into the transmitter final amplifier through the antenn...

Page 6: ...sing 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 The threaded interface is a 1 25 inch opening with 28 threads per inch and three contact rings To insert batteries close the eject lever and insert the upper contacts first closest to the mic capsule Polarity is marked on the label in the bottom...

Page 7: ...down 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 remain turned on and the LCD will return to the same screen or menu that was displayed previously Standby Mode A brief push of the Power Button turns the unit on and places it int...

Page 8: ...z Battery Condition An icon on the Main Window indicates the remaining power of the transmitter batteries This battery gauge is most accurate with the typical voltage drop across the life of alkaline and dry cell lithium batteries 5 623 400 40 20 0 A Battery Gauge Rechargeable batteries give little or no warning when nearing depletion If you use rechargeable batteries in the HH E01 we recommend tr...

Page 9: ...end the operating life of the batteries Compat Tuning TxPower Phase TxPower 50 mW 100 mW Backlgt The LCD includes a backlight that illuminates the display for easier viewing in dim lighting conditions It is set to come on when any button on the control panel is pressed then stay on for either 30 seconds or 5 minutes or to stay on all the time Compat Tuning TxPower Backlgt Backlgt On 30 sec 5 min R...

Page 10: ... 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 above this point Mute and Talkback Functions A special button the Side Button on the outside of the housing can be configured to provide a m...

Page 11: ...d in the LCD Main Window 5 623 400 40 20 0 A 5 623 400 40 20 0 A TB 5 623 400 40 20 0 A MUTE No Function Talkback Audio Mute When the Side Button is pressed the function will be active and the LCD will display an indication 5 623 400 40 20 0 A TB Talkback active Reverse video 5 623 400 A MUTE MUTE Mute active MUTE blinks Reverse video ...

Page 12: ...UDIO LEVEL METER INDICATES 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 E01 Audio Gain set too high Speak or sing into the HH E01 and check the Audio Level LEDs Audio Level bar graph in the HH E01 LCD and cor...

Page 13: ...put compressor Dual envelope compressor 30 dB range Gain control range 45 dB menu driven control 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 varies slightly w selection Antenna Integral Controls Ext...

Page 14: ...r 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 receiving your request we will issue you a ret...

Page 15: ...Hand Held Transmitter Rio Rancho NM 15 ...

Page 16: ...trosonics 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 for any bre...

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