Table Of Contents; Introduction - Lectrosonics M187 Operating Instructions And Troubleshooting Manual

INTRODUCTION

Thank you for selecting the Lectrosonics M187 transmitter. This transmitter repre-
sents over 70 years of combined experience in the design of RF devices and sets
new standards for operational convenience, flexibility and mechanical ruggedness.
The M187 transmitter features all metal construction and operates on high band
frequencies from 150MHz to 216MHz. The M187 was designed primarily for "belt-
worn" applications, however it works equally well for other applications and with
virtually any mounting configuration.
The M187 uses the microphone cord as the antenna, eliminating an unsightly
"dangling wire". This transmitter may be used with a wide variety of audio sources.
The multi-pin input jack allows the use of "phantom powered" lavalier microphones
with either positive or negative bias voltages. The M187 will also match low imped-
ance dynamic microphones and high impedance inputs such as musical instruments
or tape decks.
Only the M187 transmitter is covered in this manual. Receivers are described in
separate manuals. The M187 operates with any Lectrosonics 187 Series VHF
receiver. A matched transmitter/receiver combination makes up a wireless "system".

TABLE OF CONTENTS

INTRODUCTION .................................................................................................. 2
GENERAL TECHNICAL DESCRIPTION ............................................................. 3
CONTROLS AND FUNCTIONS .......................................................................... 4
BATTERY REPLACEMENT ................................................................................. 6
OPERATING INSTRUCTIONS ............................................................................ 7
MICROPHONE CORD TERMINATION ............................................................... 8
M187 INPUT JACK WIRING ................................................................................ 9
TROUBLESHOOTING ....................................................................................... 11
SPECIFICATIONS AND FEATURES ................................................................. 12
SERVICE AND REPAIR ..................................................................................... 13
RETURNING UNITS FOR REPAIR ................................................................... 13
WARRANTY ......................................................................................... Back cover
The M187 transmitter is FCC type accepted under the following Parts:
Part 90 (169-172 MHz) Part 74 (174-216 MHz)
2