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INSTRUCTION MANUAL

Rio Rancho, NM, USA

www.lectrosonics.com

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Serial Number:

Purchase Date:

US Patent 7,225,135

Digital Hybrid Wireless®

Watertight Belt-Pack Transmitter

WM, WM/E01, WM/E02, WM/X

LECTROSONICS, INC.

Introduction

The WM transmitter is designed to resist damage

when used in wet or dusty conditions and also offer

a comprehensive feature set that makes it equally at

home in ﬁlm and television production and on stage.

A solid machined aluminum housing with a corrosion

resistant ﬁnish hosts dual battery compartments, a

moisture sealed control panel with backlit LCD and

enlarged membrane switches. Recessed seats for the

O-rings in the battery caps and input jack allow the

caps and mic connector to be tightened securely with-

out excessive deformation of the O-rings.

The antenna is made of an extremely durable, multi-

strand alloy that will withstand heavy abuse. It is

mounted with a compression sealed strain relief that

prevents dust and moisture from entering the housing.

As the ﬁrst stage in the signal processing chain, the

input preamp section includes very high quality, low

noise components with a wide range of gain adjust-

ment in 1 dB increments and a DSP-controlled input

limiter. Dual color LEDs on the control panel accurately

indicate audio input level for precise gain adjustment.

Easily accessed screens on the LCD simplify setup

and adjustments.

Output power is adjustable to provide either extended

operating range or extended battery life as needed for

the application.

The Digital Hybrid Wireless® design (US Patent

7,225,135) combines 24-bit digital audio with analog

FM resulting in a system that has the same operating

range as analog systems, the same spectral efﬁciency

as analog systems, the same long battery life as ana-

log systems, plus the excellent audio ﬁdelity typical of

pure digital systems.

The DSP-based design works with all Digital Hybrid

receivers, and is backward compatible for use with

Lectrosonics IFB receivers and some other brands of

analog wireless receivers.

Watertight Transmitter

Rio Rancho, NM 3

Table of Contents

Introduction 2 .............................................................................................................................................................................................

General Technical Description ..............................................................................................................................................................4

Servo Bias Input....................................................................................................................................................................................4

No Pre-Emphasis/De-Emphasis 4 ...........................................................................................................................................................

Low Frequency Roll-Off 4 ........................................................................................................................................................................

Input Limiter 4 ..........................................................................................................................................................................................

Signal Encoding and Pilot Tone 5 ............................................................................................................................................................

Microprocessor Control 5 .........................................................................................................................................................................

Compatibility Modes 5 ..............................................................................................................................................................................

Control Panel 5 ........................................................................................................................................................................................

Wide-Band Deviation 5 ............................................................................................................................................................................

Variable Power Output 5 ..........................................................................................................................................................................

Battery Operation 5 ..................................................................................................................................................................................

Output Isolator 5 ......................................................................................................................................................................................

Controls and Functions 6 .........................................................................................................................................................................

LCD Screen 6 ..........................................................................................................................................................................................

Power LED 6 ............................................................................................................................................................................................

Audio Input Jack 6 ....................................................................................................................................................................................

Battery Compartment and Thumb Screw 6 ..............................................................................................................................................

Modulation LEDs 6 ...................................................................................................................................................................................

AUDIO Button 6 .......................................................................................................................................................................................

FREQ Button 6 .........................................................................................................................................................................................

Up/Down Arrows 6 ...................................................................................................................................................................................

Antenna 6 .................................................................................................................................................................................................

Battery Compartments 7 ...........................................................................................................................................................................

About Batteries 7 .......................................................................................................................................................................................

Input Connector 7 ......................................................................................................................................................................................

Equivalent Input Circuit Diagram 7 ..........................................................................................................................................................

Operating Instructions 8 ...........................................................................................................................................................................

Power Up and Boot Sequence 8 ..............................................................................................................................................................

Power Down 8 ..........................................................................................................................................................................................

Standby Mode 8 .......................................................................................................................................................................................

Menus and Settings 9 ................................................................................................................................................................................

UP Arrow Settings 9 ..................................................................................................................................................................................

Compatibility Mode 9 ...............................................................................................................................................................................

Input Type ..............................................................................................................................................................................................9

RF Power Output 9 ..................................................................................................................................................................................

LCD Backlight 9 .......................................................................................................................................................................................

Frequency Step Size 10 ...........................................................................................................................................................................

DOWN Arrow Settings 10 ..........................................................................................................................................................................

Remote Control 10 ...................................................................................................................................................................................

Auto Power Restore 10 ............................................................................................................................................................................

Audio Mute 11 ..........................................................................................................................................................................................

FREQ Button Settings 12 ..........................................................................................................................................................................

AUDIO Button Settings 12 ........................................................................................................................................................................

Low Frequency Roll-off 12 .......................................................................................................................................................................

Input Gain 12 ...........................................................................................................................................................................................

LectroRM 13 ...............................................................................................................................................................................................

Troubleshooting 14 ....................................................................................................................................................................................

Accessories and Replacement Parts 16 ..................................................................................................................................................

Straight Whip Antennas .......................................................................................................................................................................17

Preventing Corrosion 18 ...........................................................................................................................................................................

Desiccant Battery Caps 18 .......................................................................................................................................................................

Battery Door Update.............................................................................................................................................................................18

Re-conditioning (drying out) the caps and desiccant beads 19 ...............................................................................................................

Replacing the desiccant beads 19 ...........................................................................................................................................................

Speciﬁcations 20 ......................................................................................................................................................................................

Service and Repair 22 ...............................................................................................................................................................................

Returning Units for Repair 22 ..................................................................................................................................................................