CHC16U/550
7
Rev. 06/03
Ph: 800-421-6511
www.picomacom.com
Installation Procedure
OUT
AC 120V
60Hz
22W
600VA MAX
IN
BALANCE OUTPUTS FROM
MODULATORS, PROCESSORS, STRIP AMPS
RF OUT To TV Or Distribution System
Signal Combining Methods
PICO MACOM
recommends connecting the headend compo-
nents in the following manner: Each of the modulators, signal
processors or strip amplifiers output are connected to a combin-
ing network. Either a
PHC-12G
or a
PHC-24G
headend com-
biner 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 combined on the other row of directional couplers
for maximum isolation. The output of the combiners may be con-
nected to the input of a launch amplifier 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.
V
A
+60dBmV OUT
REDUCE OUTPUT
TO +42dBmV
+60dBmV OUT
REDUCE OUTPUT
TO +42dBmV
+60dBmV OUT
REDUCE OUTPUT
TO +42dBmV
+60dBmV OUT
REDUCE OUTPUT
TO +42dBmV
+10dBmV
+14dBmV
+10dBmV
h. 2
C 3
C 4
RF
IN
RF
IN
CHC-16U/550
+10dB to +15dB
*BS
RF
IN
C
h.
h.
Ch. 5, 6, 7, 8, etc.
+57dBmV
PFAM550
PFAM550
REMAINING
INPUTS
Installation
It is recommended that assistance be available to safely install
equipment in equipment racks. Chassis must be fastened securely
in equipment rack before populating with modules.
1
. Install chassis in equipment rack (equipment rack sold sepa-
rately) by supporting the bottom and rear of
CHC16U/550
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 side holes in chassis
and thread into the tapped equipment rack holes.
4
. Fasten the bottom screws first, then fasten top screws (tighten
securely).
5
. Connect power cord to AC receptacle supplying uninterrupted
line power.
6
. Connect cables from the output of channel sources (modula-
tors, processors, strip amplifiers, etc.) and the input connections
of the
CHC16U/550
.
7
. Connect a cable from the output of the
CHC16U/550
to the
input of the distribution system.
Signal Combining
The
CHC16U/550
sixteen channel active headend combiner
provides both signal combining and post amplification of the
headend signals. Up to 16 channels may be combined using the
CHC16U/550
. The combiner gain is 12 dB per channel.
CAUTION:
Per channel input level not to exceed 42 dBmV for 16
channels. To exceed this level will cause distortion.