Lectrosonics UMC195d User Manual
UHF and VHF
Rack Mount Multi Channel Systems
OPERATING INSTRUCTIONS
and trouble-shooting guide
RDM4, SDM4, SDM4D
UMC190, UMC195, UMC195D
LECTROSONICS, INC.
Rio Rancho, NM
www.lectrosonics.com
UHF and VHF
INTRODUCTION
The RDM4, SDM4, SDM4D, UMC190, UMC195 and UMC195D systems are high
quality, multi-channel wireless microphone systems designed for sound stage,
studio, and theater applications. Multi-channel problems such as interaction of
receivers, intermodulation and desensitization, etc. have been eliminated through
creative engineering and superior design. The integral RF/Power distribution
module provides convenience of operation from a common antenna system and
power supply without degrading the performance of the receivers. In fact, the
additional RF filtering in the distribution module actually improves the already
outstanding selectivity of the receivers.
This manual covers the following systems:
Multi-Channel System Installed Receivers
UMC190 frame with UHF RF/power distribution ....................UR190, UCR190
UMC195 frame with UHF RF/power distribution ....................UCR195 only
UMC195D frame with UHF RF/power distribution .................UCR195D only
SDM4 frame with VHF RF/power distribution......................... CR175, CR187
SDM4D frame with VHF diversity RF/power distribution ........ DR175 only
RDM4 frame with VHF RF/power distribution ........................R175 only
TABLE OF CONTENTS
INTRODUCTION .................................................................................................. 2
GENERAL TECHNICAL DESCRIPTION ............................................................ 3
ASSEMBLY and INSTALLATION ......................................................................... 4
FRONT PANEL DESCRIPTION........................................................................... 5
REAR PANEL DESCRIPTION ............................................................................. 5
TROUBLESHOOTING ......................................................................................... 6
ACCESSORIES .................................................................................................... 6
ANTENNA USE AND PLACEMENT .................................................................... 7
SPECIFICATIONS ................................................................................................ 8
SERVICE AND REPAIR ....................................................................................... 9
RETURNING UNITS FOR REPAIR ..................................................................... 9
WARRANTY ......................................................................................... Back cover
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Rack Mount Multi-Channel Systems
GENERAL TECHNICAL DESCRIPTION
The Multi-Channel Wireless Systems consist of two sub-systems; the frame which contains the receivers and the
receiver mounting hardware, and the RF/power distribution module.
The RF/power distribution module is the heart of the Multi-Channel Wireless System. Selective filtering in the front
end of the RF section attenuates out-of-band RF signals preventing intermodulation and front end overload. Following the filters is a low noise, low gain RF amplifier designed to evenly compensate for splitter losses in the stage that
follows. A precision splitter/isolator divides the RF signal into four isolated signals preventing spurious RF coupling
between receivers. The splitter/isolator is termination independent which prevents mismatched or disconnected RF
outputs from affecting the other receivers.
Power is supplied to the RF/power distribution module from an external DC power supply module. This keeps AC
hum problems to a minimum. All power circuits are protected by internal auto-reset fuses in the RF/power distribution module. Should the power to one receiver fail, the others will continue to operate.
Diversity RF/Power Distribution Module
A
ANTENNA
RF FILTERING & DISTRIBUTION
B
ANTENNA
POWER
SUPPLY
FRONT END
FILTERS
RF
AMP
RF
AMP
REGULATOR
POWER SUPPLY & DISTRIBUTION
SPLITTER
&
ISOLATOR
RF to
Receivers
SPLITTER
&
ISOLATOR
POLYFUSES
12V DC
Power to
Receivers
Rio Rancho, NM – USA
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