Lectrosonics QUADBox User Manual

UHF/VHF QuadPak Multicoupler

Convenience and performance...

The QUADBox multicoupler provides a convenient,
highly portable mechanical assembly with integral RF
and power distribution for up to four receivers. Two
different multicouplers are available to configure the
system for either the UCR190 UHF receivers or the
CR187 VHF receivers.

The signal from a single antenna is filtered, amplified
and distributed to the four receivers through a high
performance RF multicoupler. The RF distribution mod­ule is a high performance design that applies filtering
before gain is applied to the signal. The gain applied to
the signal is just enough to compensate for the required
loss in the splitter to preserve the excellent RF perfor­mance of the receivers. A 2-pole ceramic resonator is
used ahead of the RF amplifier to reject energy above
and below the passband. The RF amplifier is a high
current type with a high overload threshold to minimize
intermodulation.

TECHNICAL DATA

Feature Highlights

• Houses up to four UHF or VHF receivers.

• Single antenna and power supply

• Modular configuration

• Distribution module includes RF filters,
amplifier, “strip-line” splitter and power
distribution.

• High RF overload threshold minimizes IM.

• Built-in rechargeable gel-cell batteries.

• External DC and 9V dry cell batteries
provide backup power sources.

• Power distribution via independent auto­reset thermal fuses for each receiver.

RF strip line splitter...

A 1/4 wave transmission line RF splitter following the RF
amplifier is integrated into the multi-layer circuit board to
provide isolation between the receivers and low loss RF
signal distribution. One of the advantages of this type of
splitter is that unused RF outputs do not necessarily
have to be terminated, which is important due to the
modular configuration of the system.

Modular configuration...

Each of the receivers and the distribution module can be
removed for use separately or for service. This makes it
easy to use the receivers independently on a camera, in
a cart or in a bag, as the need arises.

Powering options...

Built in rechargeable gel-cell batteries provide over 15
hours of operation on a single overnight charge. The
assembly can also be powered from external 12V DC
via the distribution module, or with 9 Volt batteries in the
receivers and the disttrbution module.

Rugged mechanical package...

The housing is constructed of machined aluminum in a
rugged design that will withstand heavy use in the field.
The receivers and distribution module are nested into
pockets milled into the aluminum front panel.

LECTROSONICS, INC.

Specifications and Features

QUAD Box Assembly

The mechanical assembly will accept either the UDM4 UHF
distribution module or the UCDM4-SMT VHF distribution
module. These two units are the same except for the fre­quency range of operation.

All rear panel connectors are recessed for protection, yet
fully accessible. Receivers and the distribution module are
easily removed for use separately or for servicing.

Built-in gel-cell batteries provide up to 9 hours of operation
per overnight charge. The batteries are recharged through a
4-pin XLR jack in the rear panel of the distribution module
with the supplied charger.

A zippered naugahyde dust cover surrounds the rugged
aluminum mechanical assembly. The front and rear zippered
covers include pockets with protective stiffeners.

Distribution Modules

The UDM4 is a UHF design for use with UCR190 receivers. The
UCDM4-SMT is a VHF design for use with CR187 VHF receivers.
Both units offer the same features and benefits and differ only the
in frequency band of operation. The module is easily removed for
use separately in portable bags or with sound carts.

The RF amplifier offers a high overload threshold to minimize

power for the receivers can be supplied via a 4-pin XLR jack on

the rear panel, or from the internal gel-cell batteries.

intermodulation. Isolation between receivers is provided

by a “strip line” splitter. Power is distributed to the

receivers via auto-resetting thermal fuses on each
power lead. The fuses operate independently so that

a fault on one lead will not affect the others. External DC

Distribution module:

Frequencies: • UDM4: 20MHz passbands

from 512 to 608 MHz

• UCDM4-SMT: 4 MHz pass­bands from 150 to 216 MHz

RF bandwidth: 20 MHz (UHF); 4 MHz (VHF)
RF gain: 0.5 to 1.5 dB
3rd order intercept: +19 dBm
RF filtering: 2-pole ceramic resonator

Mechanical assembly:

Power consumption: 265 mA
Internal batteries: 6.5 Ah rechargeble
Weight: 16 lbs. 5 ozs.
Approx. dimensions: 9 x 8 x 7

The distribution modules can also be powered with

an internal 9 Volt battery as a backup power source

or for use outside of the QUAD Box assembly

QBOXLIT-0799

LECTROSONICS

581 Laser Rd NE - Rio Rancho, NM - 87124 USA
[phone] [phone] Fax[phone]

www.lectrosonics.com [e-mail]

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