Lectrosonics M185 - Manual (Page 2)

INTRODUCTION
Thank you for selecting the Lectrosonics M185 transmitter. This transmitter represents over 70 years of
combined experience in the design of RF devices and sets new standards for operational convenience,
flexibility and mechanical ruggedness. The M185 transmitter features all metal construction and
operates on high band frequencies from 150mHz to 216mHz. The M185 was designed primarily for
"belt-worn" applications, however it works equally well for other applications and with virtually any
mounting configuration.
The M185 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 M185 will
also match low impedance dynamic microphones and high impedance inputs such as musical
instruments or tape decks.
Only the M185 transmitter is covered in this manual. Receivers are described in separate manuals.
The M185 operates with any Lectrosonics 185 or 170 Series VHF receiver. A matched
transmitter/receiver combination makes up a wireless "system".
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL TECHNICAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CONTROLS AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BATTERY REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M185 INPUT JACK WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SPECIFICATIONS AND FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SERVICE AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RETURNING UNITS FOR REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back cover
The M185 transmitter is FCC type accepted under the following Parts:
Part 90 (169-172 mHz)
Part 74 (174-216 mHz)
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