User guide

INTRODUCTION
Thank you for selecting the Lectrosonics system. The R185 represents over 80 combined years of experience in
the design of RF and audio devices, and sets new standards for RF performance and flexibility.
The R185 receiver was designed for professional users who demand outstanding performance and flexibility. It is a
single antenna, single channel design compatible with all Lectrosonics VHF 185 Series transmitters. The R185 may
be operated from 110V AC or from 12V DC, providing a high degree of versatility.
The R185 also functions as a receiver "module" for multi-channel receiver systems using 19 inch rack mounted
assemblies. Over 24 compatible frequencies are available allowing reliable, large-scale wireless stage productions
to run with no problems caused by cross-talk or intermodulation. RF/power distribution modules and 19" rack
mount assemblies are available to combine R185 receivers and simplify multi-channel installations.
Sharp filtering with minimal amplification in the front-end, narrow-band crystal filtering in the first IF stage, and a
double-balanced diode mixer all work together to provide extremely high selectivity, superb IM rejection, and very
high sensitivity. The end result of this design offers benefits for both the single channel and multi-channel user by
providing exceptional operating range and protection from interference.
TABLE OF CONTENTS
INTRODUCTION .......................................... 2
GENERAL TECHNICAL DESCRIPTION .......................... 3
RECEIVER FRONT PANEL ................................... 4
RECEIVER REAR PANEL .................................... 5
ANTENNA USE AND PLACEMENT ............................. 6
OPERATING INSTRUCTIONS ................................. 7
INDICATOR QUICK REFERENCE .............................. 7
TROUBLESHOOTING ....................................... 8
R185 REPLACEMENT PARTS and ACCESSORIES ................. 8
SERVICE AND REPAIR ..................................... 9
RETURNING UNITS FOR REPAIR ............................. 9
R185 SPECIFICATIONS AND FEATURES ........................ 10
WARRANTY ........................................ Back cover
3