PFAM550
7
Rev. 07/03
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 ampli-
fiers 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 combined
on the other row of directional couplers for maximum isolation. The output
of the combiners may be connected to the input of a launch amplifier such
as a
CA-30RK550
or
CA-30RK1000
. The output of the amplifier is con-
nected 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. Chassis must be fastened securely in equipment rack
before populating with modules.
1
.
Install chassis in equipment rack (equipment rack sold separately) by
supporting the bottom and rear of PFAM550 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
.
Install a short F-type jumper cable (provided) between the IF output
and IF input connector on the rear of the PFAM550 (Required for
proper operation).
6
.
Connect a cable from the output of the video source to the video
input connector of the PFAM550.
7
.
Connect a cable from the output of the audio source to the audio
input connector of the PFAM550.
8
.
Connect a cable from the output RF connector of the PFAM550 to the
input of the combining system.
9
.
Remove the channel select access panel on the front of the
PFAM550.
10
. Select the desired output channel by using a plastic screw driver to
set the DIP switches using the included chart.
11
. Connect power cord to receptacle supplying uninterrupted line power
(LED on front panel will illuminate).
12
. Connect a cable between the front panel output test point and a
spectrum analyzer or signal level meter. Measure the video and aural
carrier level.
13
. Adjust the aural carrier level to 15dB below the level of the video
carrier by slowly rotating the VIDEO AUDIO RATIO adjustment on the
front panel of the PFAM550.
14
. Connect a cable between the combining system test point and a
spectrum analyzer or signal level meter. Measure the video and aural
carrier level of the PFAM550 and adjacent channels.
15
. Adjust the Output level of the PFAM550 to match the video and audio
carrier levels of adjacent channels by adjusting the OUTPUT LEVEL
adjustment on the front panel of the PFAM550.
RF OUT
IF IN
IF OUT
VIDEO IN
AUDIO IN
AC117V
60Hz/35W
600W MAX
125VAC
0.5A
CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD, REPLACE ONLY WITH SAME TYPE 0.5A 125V FUSE
FUSE
_
+
_
+
_
+
_
+
+
+
+
+
VIDEO
OUT
COMPOSITE
OUT
70 MHz
IN
OUT
AUDIO OUTPUT LEVEL
VIDEO
LEVEL
RF IN
950-1450
MHz
18V 250mA
LNB POWER
OUT
ON OFF
117V
.35A
60Hz
DATA
CLOCK
LANGUAGE
GND
+
_
MONO
LEFT
RIGHT
AUDIO OUTPUT
FUSE
AC25OV
1/2A
H
V
L
R
MONO
INV
NOR
Audio Output Connection:
Center Conductor to Mono+(Positive)
Shield to Mono-(Negative)
From Satellite Antenna
950-1750MHz
RF OUT to TV or
Distribution System
AUDIO IN
VIDEO OUT
PR4200IRD SATELLITE RECEIVER
PFAM550 MODULATOR
+36dBmV
+60dBmV
SP860
XBS
V
A
+52dBmV
+52dBmV
+52dBmV
+10dBmV
+14dBmV
+10dBmV
6dB PAD
RF
IN
RF
IN
PHC-12G
-18dB
CA-30RK550
SP860
V
A
+55dBmV
+55dBmV
+60dBmV
+10dBmV
+14dBmV
+10dBmV
h. 2
C 3
C 4
PAD
RF
IN
RF
IN
CHC-16U/550
+6dB
to
+12dB
XBS
SP860
V
A
+50dBmV
+50dBmV
+50dBmV
+10dBmV
+14dBmV
+10dBmV
EVEN CHANNELS
Ch. 2
ODD CHANNELS
+43dBmV
+43dBmV
+39dBmV
+60dBmV
8dB PAD
RF
IN
RF
IN
CA-30RK550
XBS
Ch. 2
Ch. 3
Ch. 4
ATTENUATOR PAD
C
h.
h.
+65dBmV
ATTENUATOR PAD
ATTENUATOR PAD
Ch. 4
Ch. 3
PFAM550
PFAM550
PFAM550
PFAM550 Manual.qxd 7/29/03 2:12 PM Page 7
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