KÁBEL-TV RENDSZEREKET GYÁRTÓ ÉS FORGALMAZÓ MAGYAR - AMERIKAI KFT.
A HUNGARIAN - AMERICAN LTD. COMPANY FOR MANUFACTURE AND SALES OF CABLE TV EQUIPMENT
ACTIVE COMBINER
CW -4076
USER'S GUIDE
Dear User!
Thank you for your trust in our company, ex-
pressed by buying our product. We believe your new
equipment will come up to your expectations and
through faultless operation it will justify your decision.
We would like to support you in your work by
summarizing here all the instructions related to the
installation and use of the unit.
MECHANICAL CONSTRUCTION
The ACTIVE COMBINER is accommodated in a
standard 4 unit high 19" rack frame. The unit is deliv-
ered along with the following accessories:
1. Power cord
1 ea.
2. Mains fuse T 0.4 A (slow)
1 ea.
2.
75
Ω
F-type termination
2 ea.
For easy cabling, it is practical to mount the ACTIVE
COMBINER in the mid of the rack. The channel
processing units are to be separated from each other
by using a vented cover plate (CW-4004) between
them.
ELECTRICAL CONSTRUCTION
The CW-4076 ACTIVE COMBINER has been de-
signed for combining analogue TV signals, digital
TV signals and FM radio signals, as well as for am-
plifying and distributing the signals in the reverse
path.
The input and output connectors are arranged in the
unit's rear panel:
10 ea. Analogue TV input
F socket
10 ea. Digital TV input
F socket
6 ea. FM radio input
F socket
1 ea. High level output
F socket
1 ea. Control output
F socket
5+1 ea. Low level output
F socket
3+1 ea. Reverse output
F socket
The inputs and outputs are capacitively separated.
The main subunits of the CW-4076 ACTIVE
COMBINER are built in module form and are inter-
changeable. The main modules are followings:
o
Output module
, built of two high drive excitation
GaAs hybrids. One of them drives the conventional
two-way analogue output, the other drives the optical
lines through five attenuated outputs (OUT1…
OUT5) and a high level output (OUT). From this
latter high level output (OUT), further optical line
driver outputs can be established by connecting an
external directional coupler. The output has to be
terminated with 75
Ω
.
The signals coming from the direction of the distribu-
tion network are separated from the conventional
output by a crossover filter, and led to the reverse
path module.
The output signal levels of the low and high level
amplifiers can be adjusted with the OUTPUT LEVEL
attenuators on the rear panel.
o
Analogue TV signal combiner module
, equipped
with 10 wide-band inputs for 47-860 MHz, thus,
using external eight-input SELECTIVE COMBI-
NER-8 units as pre-combiners, the module can re-
ceive the signals of 10 × 8 = 80 analogue TV chan-
nels. The module comprises a hybrid as preamplifier,
and its gain can be adjusted with the module’s GAIN
potentiometer on the rear panel.
o
Digital signal combiner module
, with the same
construction as the analogue TV signal combining
module, thus with a capability of combining the sig-
nals of 10 × 8 = 80 digital TV channels The gain of
the module can be adjusted with the module’s GAIN
potentiometer on the rear panel.