ADC PWR-AVIS User manual
PWR-AVIS
User Manual
ADCP-61-814
Issue 1
April 1999
1052205 Rev A
TEST 16 15 14 13 12 11 10 987654321
AVIS-16
SIGNAL OUTPUT
SIGNAL INPUT CHASSIS GROUND
12249-B
SPARE
SPARE
–48V (1)
RET (1)
–48V (2)
RET (2)
PS1 ALM A
PS1 ALM B
PS2 ALM A
PS2 ALM B
CLASS 2
ADCP-61-814 •Issue 1 •April 1999
Page ii
COPYRIGHT
1999, ADC Telecommunications, Inc.
All Rights Reserved
Printed in the U.S.A.
REVISION HISTORY
ISSUE DATE REASON FOR CHANGE
1 04/99 Original.
TRADEMARK INFORMATION
ADC and ADC Telecommunications are registered trademarks of ADC Telecommunications, Inc.
DISCLAIMER OF LIABILITY
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no
event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims
any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies
to all products, publications and services during and after the warranty period.
This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension 3475
(in U.S.A. or Canada) or 612-946-3000 (outside U.S.A. and Canada), or by writing to ADC Telecommunications, Inc., Attn:
Technical Assistance Center, Mail Station #71, P.O. Box 1101, Minneapolis, MN 55440-1101, U.S.A.
ADC Telecommunications, Inc.
P.O. Box 1101, Minneapolis, Minnesota 55440-1101
In U.S.A. and Canada: 1-800-366-3891
Outside U.S.A. and Canada: (612) 938-8080
Fax: (612) 946-3292
ADCP-61-814 •Issue 1 •April 1999
Page iii
1999, ADC Telecommunications, Inc.
TABLE OF CONTENTS
Content Page
ABOUT THIS MANUAL.......................................................................v
ADMONISHMENTS..........................................................................v
GENERAL SAFETY PRECAUTIONS................................................................v
1GENERAL..........................................................................1
2DESCRIPTION.......................................................................3
2.1 Physical Description.............................................................3
2.2 Functional Description............................................................4
2.3 Technical.....................................................................10
3INSTALLATION......................................................................12
3.1 Chassis Installation.............................................................12
3.2 Cabling.....................................................................14
4OPERATION........................................................................16
4.1 Passive Jack Access Card.........................................................16
4.2 Active Jack Access Card With Unity Gain...............................................21
4.3 Amplifier Jack Access Card........................................................27
5CUSTOMER INFORMATION AND ASSISTANCE.................................................28
ADCP-61-814 •Issue 1 •April 1999
Page v
1999, ADC Telecommunications, Inc.
ABOUT THIS MANUAL
This manual describes the ADC PWR-AVIS system. The manual provides a product
description, installation instructions and operational information.
ADMONISHMENTS
Important safety admonishments are used throughout this manual to warn of possible hazards
to persons or equipment. An admonishment identifies a possible hazard and then explains
what may happen if the hazard is not avoided. The admonishments — in the form of Dangers,
Warnings, and Cautions — must be followed at all times. These warnings are flagged by use
of the triangular alert icon (seen below), and are listed in descending order of severity of
injury or damage and likelihood of occurrence.
Danger: Danger is used to indicate the presence of a hazard that will cause severe personal
injury, death, or substantial property damage if the hazard is not avoided.
Warning: Warning is used to indicate the presence of a hazard that can cause severe
personal injury, death, or substantial property damage if the hazard is not avoided.
Caution: Caution is used to indicate the presence of a hazard that will or can cause minor
personal injury or property damage if the hazard is not avoided.
GENERAL SAFETY PRECAUTIONS
Shown here is the general admonishment that applies throughout the procedures in this
manual.
Warning: Warning is used to indicate the presence of a hazard that can cause severe
personal injury, death, or substantial property damage if the hazard is not avoided.
ADCP-61-814 •Issue 1 •April 1999
Page 1
© 1999, ADC Telecommunications, Inc.
PWR-AVIS USER MANUAL
1 GENERAL
This manual describes the features, functions, and installation of the ADC Power Analog
Video Interface System (PWR-AVIS) which is available with single or dual (redundant)
power supplies.
PWR-AVIS provides centralized access for testing, monitoring, patching, or amplification of
digital, analog video, or baseband signals. Circuits are accessed via little coaxial jacks (LCJ)
mounted on jack access cards. A variety of active and passive jack access cards provide
various amplification and monitoring levels. The jack access card mates with a rear interface
unit (RIU) that is mounted in the chassis. A rear interface unit provides the interface for
permanent coaxial connections (F or BNC) to network elements (NE) (see Figure 1).
Note Jack access cards are used in the RIU only for testing or troubleshooting functions.
The number of access cards required in an office must be determined and ordered by the
user based on expected provisioning and maintenance activity.
The PWR-AVIS chassis contains one or two power supplies (depending upon configuration)
and wiring for powering amplifier and active jack access cards.
6965-B
REAR
INTERFACE
UNIT
JACK
ACCESS
CARD
M
O
I
FRONT VIEW
FROM VIDEO
TRANSPORT
SYSTEM
TO VIDEO
MODULATOR
M
O
I
M
O
I
1 2 3 4 5 6 7 8 11 12 13 14 15 16 PWR12TEST9 10
Figure 1. Jack Access Card and Rear Interface Unit
ADCP-61-814 •Issue 1 •April 1999
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© 1999, ADC Telecommunications, Inc.
PWR-AVIS is typically used in headend or distribution offices to provide access to individual
4.5 MHz (NTSC or PAL) baseband video channels, data, intermediate frequencies or other
headend signals from the video backbone network. A typical network employing PWR-AVIS
is shown in Figure 2.
VIDEO
TRANSPORT
SYSTEM
#1
#1
VIDEO
TRANSPORT
SYSTEM MODULATOR/
UP CONVERTER
#16
#113
#8
#1
1 X 16
COMBINER
#1
1 X 8
COMBINER
1 X 16
COMBINER
#8
#128
#1
#2
#3
#4
#5
#6
#7
#8
1 X 8
SPLITTER
1 X 8
SPLITTER
1 X 8
SPLITTER
#64
VIDEO
FIBER
OPTIC
TRANSMITTER
#8
#1
#64
#1
#1
VIDEO
FIBER
OPTIC
TRANSMITTER
#128
TYPICAL
HEADEND/DISTRIBUTION OFFICE
TEST JACK ARRANGEMENT
FROM
VIDEO
BACKBONE
NETWORK
= VJ2000 TEST POINTS
TO
SUBSCRIBER
NODES
= AVIS TEST POINTS
MODULATOR/
UP CONVERTER
LEGEND
6405-A
Figure 2. Typical Access Jack/Equipment Arrangement
ADCP-61-814 •Issue 1 •April 1999
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© 1999, ADC Telecommunications, Inc.
2 DESCRIPTION
2.1 Physical Description
2.1.1 Chassis
The PWR-AVIS chassis are 3.5 inches (8.9 cm) high and mount in either 19- or 23-inch (48.3
or 58.4 cm) equipment racks. Reversible mounting brackets are provided for accommodating
either rack type. The protective front cover slides into the chassis when circuit access is
required. Hinged plates on the chassis mounting brackets provide an area for recording circuit
identification.
The PWR-AVIS chassis contains 17 RIUs (one for test) in which LCJ jack access cards or
amplifier cards are installed. Two slots are located at the front of the chassis for installing one
or two (depending upon configuration) power supply module(s). Office power connections for
the power supply module(s) are made, as required, via two sets of -48V and RET terminals at
the rear of the chassis. An AC to -48VDC power adapter (PWR-AVIS-110-ST) may be used
when a -48VDC power source is not available. A cable management tray at the rear of the
chassis supports the IN and OUT cables from the Network Elements.
16 114 1111 198641
AI-16
IA P
IA IP CAI D
12249-B
PA
PA
48 1
1
48
P1 A A
P1 A
P A A
P A
CA
Figure 3. PWR-AVIS Chassis
2.1.2 Power Supply Module
The power supply modules slide into slots labeled PWR 1 and PWR 2 at the front of the
chassis (see Figure 4). This DC to DC converter provides the necessary +5V power for the
chassis. A green LED at the front of the power supply module, when lit, indicates that the
power supply module is functioning properly.
ADCP-61-814 •Issue 1 •April 1999
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© 1999, ADC Telecommunications, Inc.
Note: If using the single power supply option, the module should only be inserted into
the PWR 1 slot.
Figure 4. Power Supply Module
2.2 Functional Description
PWR-AVIS provides a central jack access point between network elements (NE). See Figure 5
on thenextpage.The jack access cards provide access to circuits for monitoring and
maintenance functions. (The jack circuitry automatically provides 75-ohm termination.) The
jacks also provide patching functions to bypass defective equipment and/or isolate problems
in circuit links. The monitor jack is non-switching. Patching into this jack does not break the
circuit and allows non-intrusive access. The unity gain (baseband video) card provides a 0 dB
level at the monitor jack. The IN and OUT jacks incorporate a “make before break” switching
design and self-terminate into 75-ohms to ensure high service performance without
interruption. The IN switching jack provides access to the input signal of an NE. Patching into
the jack opens the circuit and signals can be inserted for testing or patching to bypass
defective equipment. The OUT switching jack provides access to the output signal of an NE.
Patching into the jacks opens the circuit and signals can then be extended for testing or bypass
functions. When patching arrangements do not extend the NE output signal, it is
recommended that an external 75-ohm termination plug be inserted into the OUT switching
jack. This provides greater signal isolation and reduces cross-talk level. The amplifier cards,
which do not have jacks for circuit access, provide fixed gain amplification of an incoming
signal by 0, 10 or 20 dB respectively for return path applications.
ADCP-61-814 •Issue 1 •April 1999
Page 5
© 1999, ADC Telecommunications, Inc.
10220-A
MON
FRONT JACKS REAR
EQUIPMENT
CONNECTIONS
75 OHM 75 OHM
500 OHM
0.056 µH
INDUCTOR
75 OHM
JACK ACCESS CARD REAR INTERFACE UNIT
OUT
IN IN
OUT
0.033 µH
INDUCTOR
VIDEO TRANSPORT
SYSTEM
MODULATOR/
UP CONVERTER
NETWORK ELEMENTS
0 dB Unity Gain Amplifier Monitor Network
MON
FRONT JACKS REAR
EQUIPMENT
CONNECTIONS
75 OHM
0.056 µH
INDUCTOR
75 OHM
464
OHM
JACK ACCESS CARD
93
OHM
REAR INTERFACE UNIT
OUT
IN IN
OUT
0.033 µH
INDUCTOR
VIDEO TRANSPORT
SYSTEM
MODULATOR/
UP CONVERTER
NETWORK ELEMENTS
6412-A
20 dB Below Active Signal Monitor Network
REAR
EQUIPMENT
CONNECTIONS
75 OHM
JACK ACCESS CARD REAR INTERFACE UNIT
IN
OUT
0.033 µH
INDUCTOR
SPLITTER
MODEM
NETWORK ELEMENTS
10229-A
0, 10 or 20 dB
AMPLIFIER
0, +10 and +20 dB Gain Amp Cards
Figure 5. Access Jack, Amp Cards and RIU Schematic
ADCP-61-814 •Issue 1 •April 1999
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© 1999, ADC Telecommunications, Inc.
2.2.1 Powering Options
2.2.1.1 Single (Non-Redundant) Powering
The single or non-redundant powering option provides one power supply module for powering
the RIUs. Figure 6 shows an example of this configuration.
Figure 6. PWR-AVIS With Single Power Supply Module
2.2.1.2 Dual (Redundant) Powering
The dual or redundant powering option provides two power supply modules for powering the
RIUs. Figure 7 shows an example of this configuration.
Figure 7. PWR-AVIS With Dual (Redundant) Power Supply Modules
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