Pico Macom LBS - Installation

PICO MACOM INC. 12500 Foothill Blvd. • Lakeview Terrace, CA 91342 • (818) 897-0028 • (800) 421-6511 • FAX (818) 834-7197
I N S T A L L A T I O N
S I G N A L C O M B I N I N G M E T H O D S
7
The output levels of the off-air strip amplifiers
should be the same as the output of the modula-
tors . The M600 modulators are usually com-
bined with either the SP600, LBS/HBS or 72
series strip amplifiers. Three methods are sug-
V
H
+10dBmv
+14dBmv
+10dBmv
LBS/72L
LBS/72L
LBS/72L
+52dBmv
CH 2
CH 3
CH 4
CH 2
CH 3
CH 4
PHC-12
CHC-16
+10dB
to
+15dB
V
H
+10dBmv
+14dBmv
+10dBmv
+10dBmv
+14dBmv
+10dBmv
PAD
+47dBmv
+47dBmv
+47dBmv
+36dBmv
CA-30RK
+58dBmv
+58dBmv
CH 2
CH 4
EVEN
ODD
CH 3
V
H
M600
SP600
M600
SP600
M600
SP600
-16dB
+52dBmv
+52dBmv
+52dBmv
+36dBmv
CA-30RK
+58dBmv
+43dBmv
+43dBmv
+50dBmv
+50dBmv
+50dBmv
gested to combine strip amplifier,
modulator and processor outputs.
The PHC-12 consists of two rows of direc-
tional couplers combined by a hybrid splitter.
The directional coupler combining provides
high isolation (40 dB) between the inputs. Nor-
mally the odd channels are combined on one
row while even channels are combined on the
other row of directional couplers. The com-
biner loss is 16 dB per channel.
The CHC-16 provides both signal combin-
ing and post amplification of the headend sig-
nals. The unit is basically a passive combiner
and a CA30 all in one package. Up to 16 signals
may be combined using the CHC-16. The
combiner gain is 15 dB per channel.
The final method of combining signals uses
three hybrid splitters per headend rack. The odd
channels are combined in one splitter, the even-
channels in another splitter and the two splitters are combined to a single
output with a third splitter. Each rack is then combined with a final splitter
prior to the CA-30 post amplifier.
All manuals and user guides at all-guides.com