Lectrosonics UMCWB User Manual
INSTRUCTION MANUAL
UMCWB and UMCWBL
Wideband UHF Diversity Antenna Multicouplers
• Assembly and Installation
• Antenna Types
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Serial Number:
Purchase Date:
Rio Rancho, NM, USA
www.lectrosonics.com
UMCWB
LECTROSONICS, INC.2
UHF Diversity Multicoupler
Table of Contents
General Technical Description ..............................................................................................................................................................4
RF/Power Distribution Module Block Diagram ......................................................................................................................................4
Antenna Input .......................................................................................................................................................................................5
Power Supply ........................................................................................................................................................................................5
Assembly and Installation .....................................................................................................................................................................6
Installing the Receivers .........................................................................................................................................................................6
Installing the Wire Cover .......................................................................................................................................................................7
Installing the Assembled Unit ................................................................................................................................................................7
Antenna Types and Bandwidth ..............................................................................................................................................................8
Antenna Use and Placement .................................................................................................................................................................9
Accessories ..........................................................................................................................................................................................10
Specifications .......................................................................................................................................................................................10
Service and Repair ...............................................................................................................................................................................11
Returning Units for Repair ..................................................................................................................................................................11
Rio Rancho, NM 3
UMCWB
RF FILTERING & DISTRIBUTION
POWER SUPPLY & DISTRIBUTION
Polyfuses
RF
Amp
Splitter
&
Isolator
RF to
Receivers
12V DC
Power to
Receivers
RF
Amp
Diversity RF/Power Distribution Module
11-18 VDC
>2 Amps
A
Antenna
B
Antenna
Ceramic Filters
Main
Polyfuse
Splitter
&
Isolator
General Technical Description
The purpose of wideband architecture is to provide
the flexibility needed to deal with a changing RF environment, and for mobile productions that cover broad
geographic areas. The UMCWB provides a mechanical
rack mount with power and RF signal distribution for
four diversity compact receivers in a single rack space.
The standard version covers frequency blocks from 21
through 29. The wideband low version covers frequency
blocks from 470 through 26.
The RF multicoupler preserves the sensitivity and
overload performance of the finest receivers. Selective
filtering in the front end attenuates RF signals above
and below the passband to suppress intermodulation
and noise. Following the filters is a low noise RF amplifier with gain matched to compensate for the losses in
the splitter that follows.
RF/Power Distribution Module Block Diagram
A precision strip line 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.
The assembly is powered from an external source of
11 to 18 VDC with individual auto-reset fuses for each
receiver in the RF/power distribution module. This architecture eliminates ground loops and AC hum that can
occur when the receiver outputs are connected to other
audio equipment operating from a different AC source.
LECTROSONICS, INC.4
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