Pico Macom PFAM550 operation manual Installation, Signal Combining Methods

PFAM550 Manual.qxd 7/29/03 2:12 PM Page 7

Installation Procedure

PFAM550

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
2.	in rack.
	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.

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-12Gor a PHC-24Gheadend combiner may be used to accomplish this purpose.

The PHC-12Gor PHC-24Gpassive 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-30RK550or 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-12Goutputs are combined via a two-way splitter, which is connected to a CA-30RK1000launch amplifier. The input levels to the combiner, whether from a modulator, signal processor or a strip amplifier, must be at the same amplitude.

V			+52dBmV	Ch. 2
		PFAM550
A
				PHC-12G
				-18dB
RF	+10dBmV SP860		+52dBmV		+36dBmV			+60dBmV
				Ch. 3		6dB PAD	CA-30RK550
IN
						ATTENUATOR PAD
RF	+14dBmV	XBS	+52dBmV	Ch. 4
IN	+10dBmV

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.

From Satellite Antenna 950-1750MHz

Audio Output Connection:
Center Conductor to Mono+(Positive)
Shield to Mono-(Negative)	VIDEO OUT

+

+

+

+

VIDEO

COMPOSITE

70 MHz

RF IN

18V 250mA

AC25OV

FUSE

AUDIO OUTPUT LEVEL

OUT

OUT

950-1450

1/2A

LANGUAGE

AUDIO OUTPUT

MHz

LNB POWER

VIDEO

OUT

DATA

CLOCK

MONO

LEFT

RIGHT

+

_

+

_

GND

+

_

+

_

+

_

L

R

MONO

LEVEL

117V

IN

OUT

ON

OFF

.35A

INV

NOR

H

V

60Hz

PR4200IRD SATELLITE RECEIVER

VPFAM550 +55dBmV

A

RF	+10dBmV SP860		+55dBmV
IN
RF	+14dBmV	XBS	+60dBmV	PAD
IN	+10dBmV

ATTENUATOR PAD

Ch. 2

CHC-16U/550

+6dB to +12dB

Ch. 3

Ch. 4

Ch. 2

+65dBmV

				125VAC	600W MAX	AC117V
IF IN	IF OUT	VIDEO IN	AUDIO IN	0.5A		60Hz/35W
RF OUT
				FUSE

CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE

HAZARD, REPLACE ONLY WITH SAME TYPE 0.5A 125V FUSE

PFAM550 MODULATOR

RF OUT to TV or	AUDIO IN
Distribution System

VPFAM550 +50dBmV

A				+43dBmV
				Ch. 4
RF	+10dBmV SP860		+50dBmV	EVEN CHANNELS
				+39dBmV
IN
				Ch. 3
RF	+14dBmV	XBS	+50dBmV	+43dBmV
IN	+10dBmV

ODD CHANNELS

8dB PAD CA-30RK550

ATTENUATOR PAD

+60dBmV

Ph: 800-421-6511 www.picomacom.com 7

Rev. 07/03