RDS-2 Redundant Amplifier Switch
RF Worx
®
Signal Protection
User Manual
ADCP-61-819
Issue 1
July 2000
1080155 Rev A
15026-A
ADCP-61-819 • Issue 1 • July 2000 • Preface
Page ii
COPYRIGHT
2000, ADC Telecommunications, Inc.
All Rights Reserved
Printed in the U.S.A.
REVISION HISTORY
ISSUE DATE REASON FOR CHANGE
Issue 1 07/2000 Original
TRADEMARK INFORMATION
ADC and ADC Telecommunications are registered trademarks of ADC Telecommunications, Inc.
RDS-2 is a trademark of ADC Telecommunications, Inc.
SWATCH is a trademark of ADC Telecommunications, Inc.
RF WORX is a registered trademark of ADC Telecommunications, Inc.
Pentium is a registered trademark of the Intel Corporation.
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: (952) 938-8080
Fax: (952) 946-3292
ADCP-61-819 • Issue 1 • July 2000 • Preface
Page iii
2000, ADC Telecommunications, Inc.
TABLE OF CONTENTS
Content Page
ABOUT THIS MANUAL ....................................................................... v
ADMONISHMENTS
..........................................................................
v
1 GENERAL
..........................................................................
1
1.1 Graphic User Interface – SWATCH
TM
Switch Monitoring Software ............................... 2
2 DESCRIPTION
.......................................................................
2
2.1 Functional Description
...........................................................
2
2.2 Physical Description ............................................................ 3
2.3 Technical Description
............................................................
5
3 INSTALLATION ...................................................................... 6
3.1 Redundant Amplifier Switch Installation
...............................................
6
3.2 Connecting the Redundant Amplifier Switch to a Computer
..................................
8
3.3 Alarm Wiring
.................................................................
8
3.4 220 too 240 VAC Operation
........................................................
9
3.5 RF and Power Cables
............................................................
10
3.6 The Setup Button
...............................................................
10
4 OPERATION (SWATCH
TM
GRAPHIC USER INTERFACE)
............................................
11
4.1 System Requirements
...........................................................
11
4.2 Installation
...................................................................
11
4.3 Graphic User Interface (GUI) Overview
................................................
12
4.4 Configuring the Program
..........................................................
14
4.5 Program Operation
..............................................................
29
4.6 System Monitoring
..............................................................
34
4.7 SWATCH
TM
Glossary
.............................................................
36
5 MAINTENANCE
......................................................................
38
5.1 Preventive Maintenance
..........................................................
38
5.2 Fuse Replacement
..............................................................
38
6 CUSTOMER INFORMATION AND ASSISTANCE ................................................. 39
ADCP-61-819 • Issue 1 • July 2000 • Preface
Page iv
2000, ADC Telecommunications, Inc.
ADCP-61-819 • Issue 1 • July 2000 • Preface
Page v
2000, ADC Telecommunications, Inc.
ABOUT THIS MANUAL
This manual provides installation, operation, and maintenance instructions for the ADC RF
Worx RDS-2 Redundant Amplifier Switch. It also includes instructions for the S
WATCH
™
switch monitoring software.
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-61-819 • Issue 1 • July 2000
Page 1
© 2000, ADC Telecommunications, Inc.
RDS-2 REDUNDANT AMPLIFIER SWITCH –
RF WORX SIGNAL PROTECTION USER MANUAL
1 GENERAL
The ADC RF Worx Redundant Amplifier Switch (Figure 1), a member of the RF WorxTM
family of products, monitors the RF signal gain of an operating (primary) amplifier and
switches to a backup (standby) amplifier if the gain of the primary amplifier falls below a set
point. When an amplifier gain failure occurs, the unit rapidly switches the input power and
then the input and output RF connections from the failed primary amplifier to its backup
amplifier. A STATUS LED is located on the front panel of the switch. An RS-485 interface
provides amplifier calibration data (i.e., date and time) and operating/failure status to a
Windows 95/98/NT/2000 personal computer (PC) equipped with SWATCHTM switch
monitoring software and appropriate interface cards. If the RF input to the primary amplifier
falls below a detectable level, the switch sends a Loss of Signal (LOS) alarm to the PC but
does not switch amplifiers.
The Redundant Amplifier Switch is designed for use in 19-inch or 23-inch equipment racks.
All RF signal connections to the switch are made through standard 75-ohm BNC connectors
(RDS2-RA-B) or F connectors (RDS2-RA-F) on the rear panel.
The RF bandwidth used with this equipment is that of the CATV forward path video (i.e., 50
to 1000 MHz).
15026-A
Figure 1. Redundant Amplifier Switch (RDS-2)
ADCP-61-819 • Issue 1 • July 2000
Page 2
© 2000, ADC Telecommunications, Inc.
1.1 Graphic User Interface – S
WATCH
TM
Switch Monitoring Software
The S
WATCH
TM
GUI software for the Redundant Amplifier Switch provides continuous remote
monitoring of the switch and associated systems. It is designed for Windows
TM
95/98/NT/2000systems with a 133 MHz (or faster) Pentium
TM
processor. See Section 4.
2 DESCRIPTION
This section provides functional, physical, and technical descriptions of the RDS-2 Redundant
Amplifier Switch.
2.1 Functional Description
Figure 2 is block diagram for the redundant amplifier switch. Both the RF input and output
signals are applied to a coupler that routes a small portion of the signal through an analog level
detection circuit and an analog-to-digital converter to the logic and control circuits. Other inputs
to the logic and control circuits include the SWITCHING THRESHOLD, GAIN TRIP LEVEL
(2 to 7 dB down from the amplifier reference level), Primary AMP SELECT, and the
NORMAL/CALIBRATE controls in the S
WATCH
TM
software (see Section 4). When triggered by
a Primary amplifier gain failure, the logic and control circuits switch on input power to the
Backup amplifier, then, after a short delay, the RF In and RF Out signals are also switched over
to the Backup amplifier (total elapsed time equals approximately 50 msec). After successfully
switching to the Backup amplifier, input power to the Primary amplifier is turned off.
RF OUTPUTRF INPUT
RF
RDS-2AA
BB
RF
A INPUT
POWER
POWER
PORT 1
PORT 2
MICROPROCESSOR
CONTROL
PRIMARY
AMP
COMPUTER
MONITOR &
ALARM
SYSTEM
B INPUT
A OUTPUT
B OUTPUT
STANDBY
AMP
10141-A
Figure 2. Redundant Amplifier Block Diagram
Note:
Single or
dual failure status will cause an alarm condition and close the alarm contacts.
Future revisions of the S
WATCH
TM
software will provide increased programmability of alarm
conditions.
Note:
Loss of signal status, defined as a loss of input RF signal to the RDS-2, does not
cause an alarm contact closure since the failure is in the network upstream of the RDS-2.
However, the loss of signal condition is indicated on the front panel of the Redundant
Amplifier Switch and through the S
WATCH
TM
monitoring software.
ADCP-61-819 • Issue 1 • July 2000
Page 3
© 2000, ADC Telecommunications, Inc.
2.1.1.1 Assured Best Failure
When the Redundant Amplifier Switch goes into a dual failure state, the assured best failure
algorithm of the microprocessor will momentarily compare the gain of the A & B side amplifiers. It
will then choose the amplifier with the strongest gain and “lock” onto it until the dual failure status
condition is cleared. This assures that the Redundant Amplifier Switch uses the best possible
amplifier during a dual failure condition – to minimize service degradation/interruption.
2.2 Physical Description
Figure 3 shows the front panel of the Redundant Amplifier Switch. The parts are identified by
letter and include a brief description.
ABCDEF
15027-A
Figure 3. Front Panel of the Redundant Amplifier Switch
LETTER NAME DESCRIPTION
A
Amplifier Input Status LEDs
(Green)
When lit, shows the active amplifier
B
Amplifier Output Status LEDs
(Green)
When lit, shows the active amplifier
C
Loss of Signal (LOS) LED
(Red)
When lit, indicates a loss of input signal
to the unit.
D
Non Functioning LED N/A
E
Amp Failure LED (Red) When lit, indicates a failure in amplifier A
F
Amp Failure LED (Red) When lit, indicates a failure in amplifier B
ADCP-61-819 • Issue 1 • July 2000
Page 4
© 2000, ADC Telecommunications, Inc.
Figure 4 shows the rear panel of the Redundant Amplifier Switch. The parts are identified by
letter and include a brief description.
B
C
D
E
F
G
H
A
15028-A
Figure 4. Rear Panel of the Redundant Amplifier Switch
LETTER NAME DESCRIPTION
A
Frame Ground Screw Grounds the unit to the equipment rack/frame
B
Setup Button Calibrates the unit
C
BNC/F-Type Connectors Connects the unit to network equipment
D
RS-485 Receptacles Input and output for personal computer (with S
WATCH
TM
switch monitoring software) interface cables
E
Terminal Block Alarm and
–
48V battery power DC power connections
F
24V VDC Power Provides 24V VDC power in for power supplies 1 and 2
(left) and 24V switched power out for Amps A and B (right)
G
AC Power Out Receptacles 120 VAC outputs for powering external equipment
H
AC Power Input Receptacle Connects the unit to 120 VAC power supply
ADCP-61-819 • Issue 1 • July 2000
Page 5
© 2000, ADC Telecommunications, Inc.
2.3 Technical Description
Table 3. Redundant Amplifier Switch Specifications
PARAMETER SPECIFICATION REMARKS
Physical
Panel Dimensions
(H
×
W
×
D)
1.75
×
19
×
12 inches
(4.45
×
48.26
×
30.48 cm)
Cable tie bar extends 4"
(10 cm) beyond rear panel
Electrical
Voltage Input 48 Vdc
±
20%, or 240/120 Vac,
47 to 63 Hz, or 100 Vac, 50 to 60 Hz
75 mA typical
Power Input <5 watts typical
RF Switch 2 SPDT per panel
Bandwidth 50 - 1,000 MHz
Impedance 75
Ω
nominal
Insertion Loss 0.75 dB Typical at 750 MHz
Return Loss 25 dB Typical at 750 MHz
23 dB Typical at 1 GHz
Isolation >55 dB Typical at 750 MHz
Composite Triple Beat (CTB) –67 dBc min. 110 channels
Composite Second Order (CSO) –67 dBc min. 110 channels
Total Power (dBm) –35 dBm to +15 dBm
Calibration Range –26 dBm to +6 dBm
Switching Time
Return Delay
50 milliseconds, maximum
15 seconds (default) Adjustable from 1 second
to 4 minutes
Switch action on power failure Retain position Calibration data retained
for 1 week, minimum
Detection Points All A and B inputs
Minimum Number
of RF Channels
16 Fewer channels may
impact accuracy
Accuracy <1 dB, typical 3 to 7 dB threshold settings
Alarms Front panel LEDs, RS-485
data interface, dry relay contacts
normally open
Environmental
Temperature (Operating)
0°C to + 50°C (+32°F to 122°F)
Temperature (Storage) –40°C to +70°C (–40°F to +158°F)
Humidity (Operating) 10 to 90% No condensation
Humidity (Storage) 5 to 95% No condensation
ADCP-61-819 • Issue 1 • July 2000
Page 6
© 2000, ADC Telecommunications, Inc.
3 INSTALLATION
3.1 Redundant Amplifier Switch Installation
Warning
:
Never install video equipment in a wet location or during a lightning storm
.
Use the following procedure to install and cable the Redundant Amplifier Switch in a 19-inch
network rack, or equivalent. Panel dimensions are shown in the front and top views in Figures 7 and
8 on page 7.
1. At the designated rack location, align the mounting holes in the switch mounting ears
with the threaded holes in the rack, then mount the redundant switch on the rack with
four #12-24 screws. (See Figure 5.)
15029-A
Figure 5. Installing the Redundant Switch in Rack
2. Using AWG 18 (or larger) stranded wire; connect the frame ground to the frame ground
screw in the lower left corner of the rear panel (see Figure 6).
ADCP-61-819 • Issue 1 • July 2000
Page 7
© 2000, ADC Telecommunications, Inc.
FRAME
GROUND
SCREW
SERIAL
NUMBER
15030-A
Figure 6. Rear View of the Redundant Amplifier Switch
1.25 IN.
(3.18 CM)
1.75 IN.
(4.45 CM)
18.31 IN.
(46.51 CM)
18.98 IN.
(48.21 CM)
15031-A
Figure 7. Front View of the Redundant Amplifier Switch (with Dimensioned Mounting Ears)
17.20 IN.
(43.69 CM)
15032-A
Figure 8. Top View of Redundant Amplifier Switch
ADCP-61-819 • Issue 1 • July 2000
Page 8
© 2000, ADC Telecommunications, Inc.
3.2 Connecting the Redundant Amplifier Switch to a Computer
Connect RS-485 interface cables from a personal computer (PC) to the C IN and OUT
connectors on the rear panel of the switch. This connection can be via a daisy chain to/from
other switch panels. (See Figure 9.)
Note:
No more than 32 RDS units should be attached to a PC due to signal fan out
considerations.
RS-485
IN OUT
RS-485
IN OUT
RS-485
IN OUT
REMOTE
MONITOR
UP TO FOUR
RS-485 BUSES
UP TO 32 REDUNDANT
AMP SWITCHES IN
EACH DAISY CHAIN
9402-A
Figure 9. Daisy Chained Redundant Amplifier Switch Units
3.3 Alarm Wiring
Connect two 22-26 AWG wires to the alarm terminals at the rear panel labeled ALARM NO
(normally open) and C (common). (See Figure 10.) Connect the other ends of the wires to the
alarm panel at the installation location.
NO C SPAREALARM
IN 2
VDC-48
IN 1
14956-A
Figure 10. Terminal Block for Alarm and DC Power Connections
Warning
:
The Redundant Amplifier Switch is factory set for –48 VDC or 120 VAC operation.
For 240 VAC operation, refer to subsection 3.3, 220 to 240 VAC Operation, below.
Caution
:
The +24 VDC connections available for powering external amplifiers are unfused, so
extreme care must be taken in ensuring the +24 VDC power source and/or the external
amplifiers have built-in fuse protection.
ADCP-61-819 • Issue 1 • July 2000
Page 9
© 2000, ADC Telecommunications, Inc.
3.4 220 to 240 VAC Operation
The Redundant Amplifier Switch is factory set for –48 VDC or 120 VAC operation, with
“115V” showing as the voltage setting in the power inlet module window (Figure 11). For 220
to 240 VAC operations, do the following:
Note:
The Redundant Amplifier Switch is supplied with three detachable power cords
for 120 VAC operation. For 240 VAC operation, consult your local electrical code for
the correct type or style of power cords required.
1. Make sure the power cord is removed from the power inlet module before continuing.
2. Pry open the power inlet module door from the right side using a small screwdriver or
equivalent.
3. Remove the fuse module using a small screwdriver or equivalent.
4. Rotate the fuse module 180° so that the text “230V” will show through the power inlet
module window when the door is closed.
5. Place the fuse module back into the power inlet module, making sure that the fuse
module is seated properly.
6. Close the power inlet module door, making sure that it snaps firmly into place and that
“230V” does show through the window.
7. Connect the correct type of power cord corresponding to the local electrical code.
8. GREEN front panel LEDs should be lit (refer to Figure 3) indicating that the internal
power supply is operational, and that there are no errors.
10779-A
FUSE = 2A x 2
110
OR
220
V
A
C
WINDOWFUSE
MODULE
Figure 11. Power Inlet Module
ADCP-61-819 • Issue 1 • July 2000
Page 10
© 2000, ADC Telecommunications, Inc.
3.5 RF and Power Cables
The following sections detail RF cabling based on the mode in use:
3.5.1 Redundant Amplifier Mode
1. Connect the designated RF cables to the RF connectors (A, B, and RF) under the PORT 1 and
PORT 2 markings on the rear panel of the switch. Use Table 2 as a guide for connecting the
cables. Carefully tie wrap the cables to the cable tie bar at the rear of the switch.
Table 2. RF Cable to RF Connector Assignments
LINE RF CONNECTOR
RF Signal In
Port 1, RF
Amp Inputs
Port 1, A and B
Amp Outputs
Port 2, A and B
RF Signal Out
Downstream equipment (Port 2, RF)
2. Connect the power cord to the Port A and Port B power receptacles on the rear panel of
the switch, or (if they are powered by direct current) connect them to the corresponding
DC output connections on the terminal block (Figure 12) at the rear of the switch.
3. Perform any optional steps required for your system
4. Upon initial power-up, the front panel LED should be lit, indicating that the internal
power supply is operational.
3.6 The Setup Button
The setup button is used to calibrate all channels on the Redundant Amplifier switch. Upon
initial installation default thresholds will be used.
Note:
The default threshold settings for the Redundant Amplifier Switch are:
Minimum Threshold = 4 dB
Maximum Threshold = Disabled
After installing the unit, locate the setup button on the rear panel of Redundant Amplifier
switch. It is located under the frame ground screw on the lower-left side of the panel (see
Figure 4, Page 4).
After ensuring that all cables are connected correctly, press the setup button.
ADCP-61-819 • Issue 1 • July 2000
Page 11
© 2000, ADC Telecommunications, Inc.
4 OPERATION (S
WATCH
TM
GRAPHIC USER INTERFACE)
The following section describes the S
WATCH
TM
software. This program controls all operating
parameters for the Redundant Amplifier Switch.
This section assumes the user has basic knowledge of PC operation and some experience with
the Windows
TM
interface.
4.1 System Requirements
The S
WATCH
TM
software is for use on any personal computer running Windows
TM
operating
systems (95/98/NT/2000) with a 133 MHz Pentium
TM
processor (or faster) and at least 16 MB
of RAM, 32 MB recommended.
Note
: Windows 2000 Professional requires at least 64 MB of RAM.
4.2 Installation
Insert the S
WATCH
TM
disk into your computer’s CD-ROM drive. The installation program
should begin automatically.
If the installation program fails to start, perform the following procedure:
1. Click “Start” on the windows taskbar.
2. Select “Run” from the start menu.
3. Enter the following string in the “Run” dialog box: (
X
= your CD-ROM drive)
X:\swatch\setup.exe
Figure 12. “Run” Dialog Box
4. Follow the prompts in the installation program to install the S
WATCH
TM
program on
your PC.
After the program has been successfully installed, you may run the program from the
Windows
TM
program menu or from the desktop shortcut.
ADCP-61-819 • Issue 1 • July 2000
Page 12
© 2000, ADC Telecommunications, Inc.
4.3 Graphic User Interface (GUI) Overview
All relevant terms for the user interface are called-out in Figure 13. These terms are used
frequently throughout the manual; therefore this picture should serve as a reference for topics
covered elsewhere.
A brief description of each term follows Figure 13.
TREE PANE
EVENT PANE
UNIT PANE
MENU BAR
STATUS BAR
DISPLAY BAR
Figure 13. S
WATCH
TM
GUI
Menu Bar
– Opens drop-down menus that house program options. Tables 3 through 6
on the next page contain a description of each menu.
Tree Pane
– Displays either the
Site Map
or
Unit List
Status Bar
– If enabled, displays tips, mouse pointer references, and mail reporting
results.
Event Pane
– Displays the program’s
Event Log
Unit Pane –
Displays information about the individual units within the database
ADCP-61-819 • Issue 1 • July 2000
Page 13
© 2000, ADC Telecommunications, Inc.
Table 3. File Menu
New
Creates a new document
Open
Opens an existing document
Save
Saves an opened document using the same file name
Save As
Saves an opened document to a specified file name
Preferences...
Opens the global
Preferences
dialog box
1, 2, 3, 4
A list of the most recently opened files
Exit
Closes the program
Table 4. View Menu
Status Bar
Displays or hides the
Status Bar
Unit List
Displays the units by serial number in the
Tree Pane
Site Map
Displays the
Site Map
tree in the
Tree Pane
(Default)
Display Unit Status
Displays the current unit/port power and failure status in the
Unit Pane
Unit Properties
Displays the unit and port properties in the
Unit Pane
ADCP-61-819 • Issue 1 • July 2000
Page 14
© 2000, ADC Telecommunications, Inc.
Table 5. Logging Menu
Status Scan
Starts or stops periodic scan for status and power levels
Capture Filter...
Opens dialog to configure which events are saved to disk
Display Filter...
Opens dialog to configure which events appear in the
Event Pane
Discovery Scan
Starts or stops periodic scan for new units
Table 6. Help Menu
Swatch Help
Opens the Swatch Help program.
Help Topics
Displays an index of help topics.
What’s This?
Opens a pop-up Help program. Click on an item in the program and
you will see a pop-up box with a brief description of that item.
About
Displays the version number of this application.
4.4 Configuring the Program
Upon initial launch (after installation), a setup wizard (Figure 14) will guide you in a step-by-
step manner through the process of setting up global settings for the program.
Note
: You may bypass the startup wizard and access the same screens by running the
Preferences
command (See Section 4.4.1).
ADCP-61-819 • Issue 1 • July 2000
Page 15
© 2000, ADC Telecommunications, Inc.
Figure 14. SWATCH
TM
Startup Wizard
The following section provides a detailed description of the
Preferences
command,
however, the same dialog descriptions apply to the setup wizard.
4.4.1 Using the Preferences Command
This dialog sets up global preferences for the program. Open the preferences by using the
drop-down menu as shown in Figure 15.
Right-click the
Tree Pane
or the
Event Pane
to access the
Preferences
command.
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