ADC RF Wofx User manual

ADCP-61-813
Issue 3
February 2005
1318221 Rev A
RF Worx®Dual A/B Switch
with Automatic Switchback
User Manual
OPERATING
CALIBRATION
NORMAL
SWITCHING
THRESHOLD
(-R)
B
AMANUALFAILURE
SELECT SELECT STATUS
12213-A
2A 240V
V: 38.4–57.6 VDC/100/120/240 VAC
Ø: 1
A: 1A MAX DC / 2A MAX AC
HZ: 47–63 HZ
U
R

ADCP-61-813 • Issue 3 • February 2005 • Preface
Page ii
COPYRIGHT
© 2005, ADC Telecommunications, Inc.
All Rights Reserved
Printed in the U.S.A.
REVISION HISTORY
TRADEMARK INFORMATION
RF Worx is a registered trademark of ADC Telecommunications, Inc.
ADC and ADC Telecommunications are 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 73475
(in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. and Canada), or by e-mail to [e-mail].
ISSUE DATE REASON FOR CHANGE
1 06/1999 Original
2 02/2005 Update power configuration information.
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: [phone]
Fax: [phone]

ADCP-61-813 •Issue 2 •February 2005 •Preface
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© 2005, ADC Telecommunications, Inc.
TABLE OF CONTENTS
Content Page
ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
ADMONISHMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Graphical User Interface - “SWatch” Switch Monitoring Software (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1 Atypical Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Configuring the RDS-AS for 100 to 120 VAC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 SETUP AND OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.2 Setting The Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2.1 Failure Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2.2 Threshold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2.3 Switchback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2.4 Clearing Signal Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2.5 System Reset Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2 Fuse Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 CUSTOMER INFORMATION AND ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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© 2005, ADC Telecommunications, Inc.
TABLE OF CONTENTS
Content Page
Blank

ADCP-61-813 •Issue 2 •February 2005 •Preface
Page v
© 2005, ADC Telecommunications, Inc.
ABOUT THIS MANUAL
This manual describes the ADC RF Worx Automatic Redundant Switch and associated SWatch
switch monitoring software and provides installation, operation, and maintenance instructions.
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.

ADCP-61-813 •Issue 2 •February 2005 •Preface
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© 2005, ADC Telecommunications, Inc.
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ADCP-61-813 •Issue 2 •February 2005
Page 1
© 2005, ADC Telecommunications, Inc.
1 GENERAL
The Automatic Redundant Switch, RDS-AS (Figure 1), a member of the RF Worx family of
products, provides monitoring and redundant backup to Cable TV systems.
The RDS-AS constantly monitors the channel A RF input of ports 1 and 2 and will detect a drop
in signal strength to channel A. When this occurs, the RDS-AS immediately switches to back-
up channel B in order to provide an acceptable signal level to the system. The RDS-AS will
continue to monitor channel A and will switch the signal back when acceptable signal levels
have been restored.
The RDS-AS is designed for use in 19-inch equipment racks. All RF signal connections to the
switch are made through standard 75-Ohm BNC or F-connectors on the rear panel. All
operating controls and indicators are on the front panel.
Figure 1. Automatic Redundant Switch (RDS-AS)
1.1 Graphical User Interface - “SWatch” Switch Monitoring Software (Optional)
A SWatch GUI software for the RDS-AS can be purchased separately from ADC
Telecommunications. The program provides continuous remote monitoring of the RDS-AS and
associated systems. It is designed for Windows 95 systems with a 90 MHz (or faster) Pentium
Processor.
2 DESCRIPTION
The RDS-AS functions as an electronic A/B switch. This provides redundancy to amplifiers or
receivers used anywhere in the cable TV network. Figure 2 shows a typical Dual A/B switch
configuration.
Note: The system watches to make sure that an acceptable signal has been received for a
full 15 seconds before returning to channel A.
OPERATING
CALIBRATION
NORMAL
SWITCHING
THRESHOLD
(-R)
B
AMANUALFAILURE
SELECT SELECT STATUS
12213-A
2A 240V
V: 38.4–57.6 VDC/100/120/240 VAC
Ø: 1
A: 1A MAX DC / 2A MAX AC
HZ: 47–63 HZ
U
R

ADCP-61-813 •Issue 2 •February 2005
Page 2
© 2005, ADC Telecommunications, Inc.
A typical application would protect two optical-to-RF receivers. In this configuration, the RDS-
AS can independently protect one or two pairs of receivers or amplifiers. If there are two pairs,
individual thresholds can be established for each pair, and once the RDS-AS detects a signal
level falling below threshold, it will switch from A to B for that particular pair. All status
conditions for each pair of receivers are available locally and remotely via the SWatch switch
monitoring software.
Figure 2. Block Diagram for Dual A/B Switch Mode Operation
2.1 Atypical Configuration
Figure 3 details a split system on the A side, with one receiver carrying the lower-frequency
CATV signals and the other receiver carrying the higher CATV signals. On the B side, only one
system is used to carry the combined lower/higher frequency CATV signals. It should be noted
that the RDS-AS will not provide satisfactory results in the above configuration. It is
recommended that systems with this configuration use the ADC Split Linked A/B Switch
(RDS-SLAB) product.
REDUNDANT
FIBER OPTIC
TRANSPORT
SYSTEM
RF
OUTPUT
#1
RF
OUTPUT
#2
RF
RDS-2AA
BB
RF
PRIMARY
TRANSCEIVER/
AMP
PRIMARY
TRANSCEIVER/
AMP
PORT 1 PORT 2
MICROPROCESSOR
CONTROL
COMPUTER
MONITOR &
ALARM
SYSTEM
STANDBY
TRANSCEIVER/
AMP
STANDBY
TRANSCEIVER/
AMP
10137-B

ADCP-61-813 •Issue 2 •February 2005
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© 2005, ADC Telecommunications, Inc.
Figure 3. Block Diagram for an Atypical System Configuration
Figure 4 shows the front panel of the RDS-AS. The parts are identified by letter and include a
brief description in Table 1.
Figure 4. RDS-AS Front Panel
Table 1. RDS-AS Front Panel Description
LETTER NAME DESCRIPTION
ASWITCHING THRESHOLD
display
Indicates the port being displayed and threshold at which each
port (1 or 2) will switch.Displays the start-up sequence status
BSWITCHING THRESHOLD
toggle switch
Selects the port that will be used
Adjusts threshold for the active port
CCHANNEL A LED When lit, shows Aas the active side
DAMP SELECT toggle switch Selects active channel Aor B
ECHANNEL B LED When lit, shows Bas the active side
COMBINER
REDUNDANT
FIBER OPTIC
TRANSPORT
SYSTEM
PORT 1 MICROPROCESSOR
CONTROL PORT 2
LOWER
CABLE
CHANNELS
UPPER
CABLE
CHANNELS
RECEIVER/AMP
RECEIVER/AMP
PRIMARY SIGNAL
STANDBY
RECEIVER/AMP
SECONDARY
SIGNAL
ALL CABLE
CHANNELS
RF OUTPUT #1
RDS-1
A
B
11782-A
12365-A
A B C D E F G H I J K L

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© 2005, ADC Telecommunications, Inc.
Figure 5 shows the rear panel of the RDS-AS. The parts are identified by letter and include a
brief description in Table 2.
Figure 5. Rear Panel of RDS-AS
FNORMAL LED
When lit, shows that the unit is functioning in NORMAL mode
GMODE SELECT toggle switch Selects NORMAL or CALIBRATION mode
HCALIBRATION LED
When lit, shows that the unit is in CALIBRATION mode
IOPERATING LED When lit, shows that the monitoring equipment is operating
normally
JMANUAL LED When lit, shows that side B is active and/or that the given
port is no longer monitoring
KNon-functioning LED Serves no purpose with this model
LFAILURE LED When lit, shows that channel A is below thresholdWhen
blinking, shows that the signal has returned (from a failed
state) and the unit is waiting 15
seconds to confirm signal integrity
Table 2. RDS-AS Rear Panel Description
LETTER NAME DESCRIPTION
AFrame Ground Screw Grounds the unit to the equipment rack/frame
BBNC/F-Type Connectors Connects the unit to network equipment
CRS-485 Receptacles Input and output for personal computer (with SWatch
switch monitoring software) interface cables
DTerminal Block Alarm and –48 V battery power DC power connections
EAC Power Out Receptacles VAC outputs for powering external equipment
FAC Power Input Receptacle Connects unit to the VAC power supply
Table 1. RDS-AS Front Panel Description
LETTER NAME DESCRIPTION
12366-B
ABC
DEF