CA-30RK550
7
Rev. 08/03
Ph: 800-421-6511
www.picomacom.com
Installation Procedure
Signal Combining Methods
PICO MACOM
recommends connecting the headend components in
the following manner: Each of the modulators, signal processors or strip
amplifiers output are connected to a combining network. Either a
PHC-
12G
or a
PHC-24G
headend combiner may be used to accomplish this
purpose.
The
PHC-12G
or
PHC-24G
passive headend combiner consists of two
rows of directional couplers combined by a hybrid splitter. Normally, the
odd channels are combined on one row while even channels are com-
bined on the other row of directional couplers for maximum isolation. The
output of the combiners may be connected to the input of a launch ampli-
fier such as a
CA-30RK550
or
CA-30RK1000
. The output of the amplifier
is connected to the main distribution line.
The
CHC16U/550
and
CHC16U/860
sixteen channel active combiners
provides both signal combining and post amplification of the headend
signals. Up to 16 channels may be combined using the
CHC16U
. The
combiner gain is 15 dB per channel.
A 24 channel system hook-up is shown. (The same combining result may
be accomplished by using a single
PHC-24G
).
The two
PHC-12G
outputs are combined via a two-way splitter, which is
connected to a
CA-30RK1000
launch amplifier. The input levels to the
combiner, whether from a modulator, signal processor or a strip amplifier,
must be at the same amplitude.
Installation
It is recommended that assistance be available to safely install equipment
in equipment racks.
1
. Install chassis in equipment rack (equipment rack sold separately)
by supporting the bottom and rear of
CA-30RK550
at the desired
elevation in rack.
2
. Line up the side holes of chassis with the tapped equipment rack
holes.
3
.
Insert the provided screws through the mounting holes at the
extreme left and right of faceplate and thread into the tapped equip-
ment rack holes.
4
. Fasten the bottom screws first, then fasten top screws. (tighten
securely).
5
.
Connect power cord to outlet supplying line power to the amplifier.
6
. Connect a cable from the output of the combining system to the IN
connector on the rear of the
CA-30RK550
.
7
.
Connect a cable from the
OUT
connector on the rear of the
CA-30RK550
to the input of the distribution network.
8
. Using a non-metallic flat blade screwdriver adjust the gain and tilt
controls on the front panel of the amplifier to meet system design
requirements.
