Contemporary Research
3
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
