Contemporary Research QCA9-33 User Manual

Product Manual

QCA9-33 Active Combiner

April 13, 2012

Table of Contents

Table of Contents ................................................................................................................................ 2

Overview ............................................................................................................................................. 3

Specifications ...................................................................................................................................... 4

Installation ......................................................................................................................................... 5

Basic Setup .............................................................................................................................................. 5

16-Channel Operation ............................................................................................................................... 5

16-64 Channel Operation .......................................................................................................................... 5

Rack Mounting .................................................................................................................................... 6

RK2 Dual Rack Kit with Tie Bar Mounting ................................................................................................... 6

RK1 Single Unit Rack Mount ...................................................................................................................... 6

RK2 – Locking Cases together ................................................................................................................... 6

Safety Instructions ............................................................................................................................. 7

Limited Warranty and Disclaimer ....................................................................................................... 8

Contemporary Research 2 QCA9-33

Overview

The Contemporary Research QCA9-33 is an active RF combiner that features eight high-level inputs and one
low-level input, combining with high isolation, and amplifying up to a 33 dBmV output level.
Designed for QMOD HDTV applications, the eight RF inputs typically receive 29 dBmV RF from QMOD HDTV
modulators. The ninth input is for up to 19 dBmV RF signals, such as incoming cable feed, a control channel
from an ICE- HE Head End control modulator, or another QMOD or QCA9-33. The extremely low-noise
wideband 860 MHz amplifier compensates for combining losses and adds 3 dBmV of gain, typically supplying
a total output of up to 33 dBmV.

The compact QCA9-33 mounts two-across in a single rack space using CR RK1 and RK-2 rack kits, and can
be mixed with QMOD HDTV modulators using the same rack kits. The units are wholly designed and
manufactured in the USA.

Features

 Combines 8 high-level inputs and one low-level input
 Compensates for combining losses and adds 3 dBmV gain
 Provides a maximum output level of up to 33 dBmV
 Low power, draws less than 2 watts
 Compact metal enclosure, mounts 2 across in 1 RU using RK1 and RK2 rack kits

Applications

 Combine 9 inputs to drive a medium-sized RF system
 9 QMOD Modulators
 8 QMOD Modulators plus ICE-HE Head End
 8 QMOD Modulators plus cable feed
 Feed output to a second CCA9-33 to combine up to 17 channels
 Feed 8 QCA9-33 units to one QCA9-33 to combine 64 or more
 channels without signal loss
 Feed combined output to a launch amplifier for larger systems

Contemporary Research 3 QCA9-33