Comtech EF Data DT-4500-A DT-4503/C-A, DT-4503/E-A, DT-4503-A, DT-4503/D-A, DT-4503/E-A, DT-4510-A, DT-4510/D-A, DT-4511-A, DT-4512-A, DT-4512/E-A, DT-4513-A, DT-4513/E-A Downconverter Installation and Operation Manual

DT-4500-A Series
Downconverters
Installation and Operation Manual
IMPORTANT NOTE: The information contained in this document supersedes all previously
published information regarding this product. Product specifications are subject to change
without prior notice.
Part Number MN-DT4500A Revision 1
DT-4500-A Series
Downconverters
Installation and Operation Manual
Part Number MN-DT4500A
Revision 1
Copyright © Comtech EF Data, 2013. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161
This page is intentionally blank.
TABLE OF CONTENTS
TABLE OF CONTENTS ........................................................................................................... III
TABLES .................................................................................................................................... X
FIGURES ................................................................................................................................... X
PREFACE ............................................................................................................................... XIII
About this Manual .......................................................................................................................... xiii
Disclaimer .............................................................................................................................................. xiii
Reporting Comments or Suggestions Concerning this Manual ............................................................. xiii
Conventions and References ........................................................................................................... xiii
Patents and Trademarks ........................................................................................................................ xiii
Warnings, Cautions, and Notes ............................................................................................................. xiv
Examples of Multi-Hazard Notices ........................................................................................................ xiv
Recommended Standard Designations ................................................................................................. xiv
Metric Conversion ................................................................................................................................. xiv
Safety and Compliance ..................................................................................................................... xv
Electrical Safety and Compliance............................................................................................................ xv
Electrical Installation .............................................................................................................................. xv
Operating Environment .......................................................................................................................... xv
European Union Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive
(1999/5/EC) and EN 301 489-1 .............................................................................................................. xvi
European Union Electromagnetic Compatibility (EMC) Directive (2004/108/EC) ............................ xvi
European Union Low Voltage Directive (LVD) (2006/95/EC) ............................................................ xvi
European Union RoHS Directive (2002/95/EC) .................................................................................xvii
European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ......................xvii
CE Mark .............................................................................................................................................xvii
Warranty Policy ............................................................................................................................ xviii
Limitations of Warranty........................................................................................................................ xviii
Exclusive Remedies .................................................................................................................................xix
Getting Help .................................................................................................................................... xx
Contacting Comtech EF Data .................................................................................................................. xx
CHAPTER 1.
1.1
INTRODUCTION ........................................................................................ 1–1
Overview ...........................................................................................................................1–1
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1.2
Functional Description ....................................................................................................... 1–2
1.2.1 Applications ............................................................................................................................. 1–3
1.2.2 RF Signal Conversion................................................................................................................ 1–4
1.2.3 Monitor & Control ................................................................................................................... 1–4
1.3
Downconverter Features .................................................................................................... 1–5
1.3.1 Physical Description................................................................................................................. 1–5
1.3.2 Dimensional Envelope ............................................................................................................. 1–6
1.3.3 Downconverter Physical Features ........................................................................................... 1–7
1.3.3.1
Front Panel ...................................................................................................................... 1–7
1.3.3.2
Rear Panel ....................................................................................................................... 1–7
1.4
Summary of Specifications ................................................................................................. 1–8
1.4.1 DT-4503/C-A C-Band Downconverter ..................................................................................... 1–8
1.4.2 DT-4503/E-A C-Band Downconverter.................................................................................... 1–10
1.4.3 DT-4503-A, /D-A, /E-A C-Band Downconverters ................................................................... 1–12
1.4.4 DT-4510-A, /D-A, DT-4511-A, DT-4512-A, /E-A Ku-Band Downconverters ................................ 1–14
1.4.5 DT-4513-A, /E-A Ku-Band Downconverters........................................................................... 1–16
CHAPTER 2.
2.1
INSTALLATION .......................................................................................... 2–1
Unpacking and Inspecting the Shipment ............................................................................. 2–1
2.2
Installing into a Rack Enclosure .......................................................................................... 2–2
2.2.1 Installing the Optional Rear-Mounting Support Brackets Kit .................................................. 2–4
2.2.2 Installing the Bearingless Rack Slide Sets ................................................................................ 2–6
2.3
Connect Prime Power Connection ...................................................................................... 2–7
2.4
Connect External Cables ..................................................................................................... 2–7
CHAPTER 3.
3.1
REAR PANEL CONNECTORS................................................................... 3–1
Rear Panel Overview .......................................................................................................... 3–1
3.2
DT-4500-A External Connectors .......................................................................................... 3–2
3.2.1 Chassis-mounted Connectors .................................................................................................. 3–2
3.2.1.1
AC Power IEC Line Input Connector Module .................................................................. 3–2
3.2.1.2
Optional DC Power Connection ...................................................................................... 3–3
3.2.1.3
J2A | REF IN, External Reference Input Connector (BNC-F)............................................ 3–3
3.2.1.4
J2B | REF OUT, External Reference Output Connector (BNC-F) ..................................... 3–3
3.2.1.5
100BASE-TX Ethernet M&C Port (RJ-45) ......................................................................... 3–4
3.2.1.6
P1 | RELAY, Summary Fault Output Connector (DB-9F) ................................................. 3–4
3.2.1.7
J1 | COM1 EIA-485/232 Interface Connector (DB-9F) .................................................... 3–5
3.2.1.8
Chassis Ground Connector.............................................................................................. 3–5
3.2.2 Module-mounted Connectors ................................................................................................. 3–6
3.2.2.1
J3 | HSB (High Speed Bus) Connector (DB-25F) .............................................................. 3–7
3.2.2.2
Switch Module IF, RF, and Loop Connectors .................................................................. 3–8
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3.3
Cable Connections ............................................................................................................. 3–9
3.3.1 Cable Connections – Standalone (Non-Redundant) Operation ............................................ 3–10
3.3.2 Cable Connections – Redundant System Operation ............................................................. 3–11
CHAPTER 4.
UPDATING FIRMWARE ............................................................................. 4–1
4.1
Introduction ......................................................................................................................4–1
4.2
Getting Started: Preparing for the Firmware Download ...................................................... 4–2
4.3 Downloading and Extracting the Firmware Update ................................................................. 4–3
4.4
Performing the Ethernet FTP Upload Procedure .................................................................. 4–4
CHAPTER 5.
FRONT PANEL OPERATION..................................................................... 5–1
5.1
Introduction ......................................................................................................................5–1
5.1.1 Switch Power On (Rear Panel) ................................................................................................. 5–2
5.1.2 LED Indicators .......................................................................................................................... 5–2
5.1.3 Keypad ..................................................................................................................................... 5–3
5.1.4 Vacuum Fluorescent Display (VFD).......................................................................................... 5–3
5.2
2BOpening Screen .............................................................................................................. 5–4
5.3
Main Menu ........................................................................................................................5–4
5.3.1 CONFIG (Configuration) ........................................................................................................... 5–5
5.3.1.1
CONFIG: OUTPUT ............................................................................................................ 5–5
5.3.1.2
CONFIG: REMOTE (Remote Control)............................................................................... 5–6
5.3.1.3
CONFIG: REDUNDANCY................................................................................................... 5–9
5.3.1.4
CONFIG: FAULTRECOVERY ............................................................................................ 5–11
5.3.1.5
CONFIG: COLDSTART..................................................................................................... 5–11
5.3.2 MONITOR ............................................................................................................................... 5–12
5.3.3 FAULTS ................................................................................................................................... 5–12
5.3.3.1
FAULTS: CURRENT ......................................................................................................... 5–12
5.3.3.2
FAULTS: STORED (Stored Faults Log) ............................................................................ 5–13
5.3.4 PRE-SELECTS .......................................................................................................................... 5–14
5.3.4.1
PRE-SELECTS: LOAD....................................................................................................... 5–14
5.3.4.2
PRE-SELECTS: PROGRAM .............................................................................................. 5–14
5.3.4.3
PRE-SELECTS: CLEAR ..................................................................................................... 5–15
5.3.5 UTILITY ................................................................................................................................... 5–15
5.3.5.1
UTILITY: TIME (Real-Time Clock) ................................................................................... 5–15
5.3.5.2
UTILITY : DISP (VFD Display) .......................................................................................... 5–16
5.3.5.3
UTILITY: AID (Application Identification String) ............................................................ 5–16
5.3.5.4
UTILITY: REFOSC (Reference Oscillator Adjustment) .................................................... 5–16
5.3.5.5
UTILITY: SLOPE .............................................................................................................. 5–17
5.3.5.6
UTILITY: LAMP-TEST ...................................................................................................... 5–17
5.3.5.7
UTILITY: FIRMWARE ...................................................................................................... 5–17
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CHAPTER 6.
Revision 1
MN-DT4500A
ETHERNET-BASED REMOTE PRODUCT MANAGEMENT ...................... 6–1
6.1
Introduction ......................................................................................................................6–1
6.1.1 Ethernet Management Interface Protocols............................................................................. 6–2
6.2
SNMP Interface..................................................................................................................6–2
6.2.1 Management Information Base (MIB) Files............................................................................. 6–2
6.2.2 SNMP Community Strings........................................................................................................ 6–3
6.2.3 SNMP Traps ............................................................................................................................. 6–3
6.3
45xxA Telnet Interface ....................................................................................................... 6–4
6.3.1 Telnet Operation via HyperTerminal ....................................................................................... 6–4
6.4
45xxA Web Server (HTTP) Interface .................................................................................... 6–5
6.4.1 Enabling the Web Server Interface.......................................................................................... 6–5
6.4.2 User Login ................................................................................................................................ 6–6
6.4.3 45xxA Web Server Interface Operational Features ................................................................. 6–7
6.4.3.1
Navigation ....................................................................................................................... 6–7
6.4.3.2
Page Sections .................................................................................................................. 6–7
6.4.3.3
Action Buttons ................................................................................................................ 6–7
6.4.3.4
Drop-down lists ............................................................................................................... 6–8
6.4.3.5
Text or Data Entry ........................................................................................................... 6–8
6.4.4 45xxA Web Server Interface Menu Tree ................................................................................. 6–8
6.4.5 45xxA Web Server Interface Page Descriptions ...................................................................... 6–9
6.4.5.1
Home Pages .................................................................................................................... 6–9
6.4.5.1.1 Home | Home ............................................................................................................ 6–9
6.4.5.1.2 Home | Contact ....................................................................................................... 6–10
6.4.5.1.3 Home | Support ....................................................................................................... 6–11
6.4.5.2
Admin Pages ................................................................................................................. 6–12
6.4.5.2.1 Admin | Access ........................................................................................................ 6–12
6.4.5.2.2 Admin | SNMP ......................................................................................................... 6–14
6.4.5.3
Config Pages .................................................................................................................. 6–15
6.4.5.3.1 Config | Converter ................................................................................................... 6–15
6.4.5.3.2 Config | Ref .............................................................................................................. 6–17
6.4.5.3.3 Config | Pre-selects .................................................................................................. 6–18
6.4.5.3.4 Config | Utility .......................................................................................................... 6–19
6.4.5.3.5 Config | Redundancy ............................................................................................... 6–21
6.4.5.4
Status Pages .................................................................................................................. 6–22
6.4.5.4.1 Status | Summary .................................................................................................... 6–22
6.4.5.4.2 Status | Faults .......................................................................................................... 6–23
APPENDIX A.
A.1
REMOTE CONTROL .................................................................................. A–1
Introduction ..................................................................................................................... A–1
A.2
Communication Interfaces ................................................................................................ A–1
A.2.1 TIA/EIA-485 (RS-485) ...............................................................................................................A–1
A.2.2 TIA/EIA-232 (RS-232) ...............................................................................................................A–2
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A.2.3
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Ethernet (100BASE-TX) ............................................................................................................A–2
A.3
Access Methods ................................................................................................................ A–2
A.3.1 Direct Access............................................................................................................................A–2
A.3.2 Indirect Access .........................................................................................................................A–3
A.4
Addresses ......................................................................................................................... A–3
A.4.1 Physical Address ......................................................................................................................A–3
A.4.2 Virtual Address ........................................................................................................................A–3
A.4.3 IP Address ................................................................................................................................A–4
A.5
Basic Protocol ................................................................................................................... A–4
A.5.1 Transmission Mode .................................................................................................................A–4
A.5.2 Baud Rate ................................................................................................................................A–4
A.5.3 Asynchronous Character Format .............................................................................................A–4
A.5.4 Character Set ...........................................................................................................................A–4
A.5.5 Response Timeout ...................................................................................................................A–5
A.5.6 Bus Inactivity Requirement .....................................................................................................A–5
A.6
Message Structure ............................................................................................................ A–5
A.6.1 Start Character.........................................................................................................................A–5
A.6.2 Device Address ........................................................................................................................A–5
A.6.3 Command ................................................................................................................................A–5
A.6.4 Confirmation Response ...........................................................................................................A–6
A.6.5 Error Response ........................................................................................................................A–6
A.6.6 End of Message........................................................................................................................A–6
A.6.6.1 Command Ending ............................................................................................................A–6
A.6.6.2 Response Ending .............................................................................................................A–6
A.7
Command / Response Pairs ............................................................................................... A–7
A.7.1 Utility Commands ....................................................................................................................A–7
A.7.1.1 Time ................................................................................................................................A–7
A.7.1.2 Date.................................................................................................................................A–7
A.7.1.3 Time Protocol Enable ......................................................................................................A–7
A.7.1.4 Time Protocol Server ......................................................................................................A–8
A.7.1.5 Local / Remote Status .....................................................................................................A–8
A.7.1.6 Media Access Control (MAC) Address ............................................................................A–8
A.7.1.7 IP Address .......................................................................................................................A–9
A.7.1.8 IP Gateway ......................................................................................................................A–9
A.7.1.9 Physical Address..............................................................................................................A–9
A.7.1.10
Baud Rate .................................................................................................................A–10
A.7.1.11
LCD Contrast .............................................................................................................A–10
A.7.1.12
LCD Brightness ..........................................................................................................A–10
A.7.1.13
Screen Saver Mode ...................................................................................................A–10
A.7.1.14
Screen Saver Timeout ...............................................................................................A–11
A.7.1.15
VFD Brightness..........................................................................................................A–11
A.7.1.16
Reference Oscillator Tuning .....................................................................................A–11
A.7.1.17
Converter Slope Adjustment ....................................................................................A–11
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A.7.1.18
Equipment Type........................................................................................................A–12
A.7.1.19
Part Number .............................................................................................................A–12
A.7.1.20
Legacy Firmware Information ..................................................................................A–12
A.7.1.21
Firmware Information ..............................................................................................A–13
A.7.1.22
Firmware Image ........................................................................................................A–13
A.7.1.23
Application Identification .........................................................................................A–14
A.7.1.24
Force Reboot ............................................................................................................A–14
A.7.2 Configuration Commands ......................................................................................................A–15
A.7.2.1 Frequency .....................................................................................................................A–15
A.7.2.2 Attenuator ....................................................................................................................A–15
A.7.2.3 Cold Start ......................................................................................................................A–15
A.7.2.4 Mute..............................................................................................................................A–16
A.7.2.5 Carrier Mute Mode .......................................................................................................A–16
A.7.2.6 Redundant Mute Mode ................................................................................................A–16
A.7.2.7 Auto Fault Recovery ......................................................................................................A–17
A.7.2.8 Program Preset .............................................................................................................A–17
A.7.2.9 Display All Presets .........................................................................................................A–17
A.7.2.10
Clear Preset Configuration .......................................................................................A–18
A.7.2.11
Select Preset Configuration ......................................................................................A–18
A.7.3 Modes ....................................................................................................................................A–19
A.7.3.1 Redundant Mode ..........................................................................................................A–19
A.7.3.2 Automatic/Manual Mode .............................................................................................A–20
A.7.3.3 Backup Mode ................................................................................................................A–20
A.7.4 Status Commands ..................................................................................................................A–21
A.7.4.1 Configuration Status .....................................................................................................A–21
A.7.4.2 Maintenance Status ......................................................................................................A–21
A.7.4.3 Utility Status..................................................................................................................A–22
A.7.4.4 Alarm Status ..................................................................................................................A–22
A.7.4.5 Summary Alarm Status .................................................................................................A–22
A.7.4.6 Terminal Status Change ................................................................................................A–23
A.7.4.7 Packed Configuration Status .........................................................................................A–23
A.7.4.8 Packed Maintenance Status..........................................................................................A–24
A.7.4.9 Packed Utility Status .....................................................................................................A–24
A.7.4.10
Packed Alarm Status .................................................................................................A–25
A.7.5 Stored Alarms ........................................................................................................................A–26
A.7.5.1 Total Stored Alarms ......................................................................................................A–26
A.7.5.2 Clear All Stored Alarms .................................................................................................A–26
A.7.5.3 List All Alarms................................................................................................................A–26
A.7.6 Error Processing .....................................................................................................................A–27
A.7.6.1 General Errors ...............................................................................................................A–27
A.7.6.2 Configuration Errors......................................................................................................A–27
A.7.6.3 Mode Errors ..................................................................................................................A–27
A.7.6.4 Time-Outs .....................................................................................................................A–27
A.7.7 Command Summaries ...........................................................................................................A–28
A.7.8 User Remote Command Summary ........................................................................................A–28
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APPENDIX B.
B.1
Revision 1
MN-DT4500A
REDUNDANT SYSTEM OPERATION ........................................................ B–1
Introduction to Redundancy Operation ..............................................................................B–1
B.2
Backup Downconverter ......................................................................................................B–2
B.2.1 High Speed Bus (HSB) .............................................................................................................. B–2
B.2.2 Detachable Modules................................................................................................................ B–2
B.2.2.1
Downconverter Switching............................................................................................... B–2
B.3
Redundant Configurations..................................................................................................B–3
B.4
Redundant System Configuration .......................................................................................B–8
B.4.1 Redundant System Configuration Using the Front Panel ........................................................ B–8
B.4.1.1
Initial Configuration ........................................................................................................ B–8
B.4.1.2
Automatic Configuration Verification ............................................................................. B–9
B.4.1.3
Manual Configuration and Verification ........................................................................ B–11
B.4.2 Redundant System Configuration using the 45xxA Web Server Interface ............................ B–13
B.4.3 Offset Adjustment ................................................................................................................. B–14
B.4.4 Redundancy Systems – Downconverter Removal and Replacement.................................... B–15
APPENDIX C.
C.1
MAINTENANCE AND TROUBLESHOOTING ............................................ C–1
Overview ...........................................................................................................................C–1
C.2
Maintenance Testing..........................................................................................................C–2
C.2.1 Test Point Samples .................................................................................................................. C–2
C.2.2 Troubleshooting ...................................................................................................................... C–2
C.2.3 Downconverter Faults ............................................................................................................. C–2
C.2.3.1
Prime Power.................................................................................................................... C–2
C.2.3.2
DC Power Supply Module ............................................................................................... C–2
C.2.3.3
RF Converter Module ...................................................................................................... C–3
C.2.3.4
Synthesizer Sum Loop Module ....................................................................................... C–3
C.2.3.5
Synthesizer Fine Step Module ........................................................................................ C–3
C.2.3.6
Reference Oscillator Module .......................................................................................... C–3
C.2.3.7
Temperature Fault .......................................................................................................... C–3
C.2.4 Converter I/O Modules ............................................................................................................ C–4
C.3
Spares ...............................................................................................................................C–4
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TABLES
Table 3-1. DT-4500-A Rear Panel External Connections .......................................................................... 3–2
Table 3-2. Ethernet M&C Interface Connector Pinout ............................................................................. 3–4
Table 3-3. P1 | RELAY Summary Fault Connector Pinout ....................................................................... 3–4
Table 3-4. J1 – 2-Wire EIA-485 Pinout ...................................................................................................... 3–5
Table 3-5. J1 – 4-Wire EIA-485 Pinout ...................................................................................................... 3–5
Table 3-6. J1 – EIA-232C Pinout ................................................................................................................ 3–5
Table 3-7. J3 HSB Interface Connector Pinout .......................................................................................... 3–7
Table 3-8. DT-4500-A and UT-4500-A Available Switch Module Assemblies ........................................... 3–8
FIGURES
Figure 1-1. DT-4500-A Series Downconverters (DT-4503-A shown)......................................................... 1–1
Figure 1-2. DT-4500-A Series Downconverter Physical Configuration ..................................................... 1–2
Figure 1-6. Typical Functional Block Diagram (DT-4512-A shown) ........................................................... 1–4
Figure 1-4. DT-4500-A Series Downconverter Dimensional Envelope ..................................................... 1–6
Figure 1-4. DT-4500-A Series Downconverter Front Panel ....................................................................... 1–7
Figure 1-5. DT-4500-A Series Downconverter Rear Panel ........................................................................ 1–7
Figure 2-1. Unpacking and Inspecting the Shipment ................................................................................ 2–1
Figure 2-2. Installing into a Rack Enclosure .............................................................................................. 2–3
Figure 2-3. Installing the Optional Rear-Mounting Support Brackets Kit ................................................ 2–4
Figure 2-4. Optional Bearingless Rack Slide Installation (FP/SL000X)....................................................... 2–6
Figure 3-1. DT-4500-A Rear Panel (DT-4503-A with Input/Output Module [IOM-XX Shown).................. 3–1
Figure 3-2. IOM, RSM, and TSM Switch Modules ..................................................................................... 3–6
Figure 3-3. DT-4500-A Cabling Schematic (DT-4503-A with Receive Switch Module [RSM-XX] Shown).. 3–9
Figure 3-4. Standalone (Non-Redundant) Downconverter Configuration with Input/Putput Module
(IOM-XX) ......................................................................................................................................... 3–10
Figure 3-5. Standalone (Non-Redundant) Downconverter Configuration with Receive Switch Module
(RSM-XX)......................................................................................................................................... 3–10
Figure 5-1. DT-4500-A Front and Rear Panel Views .................................................................................. 5–1
Figure 6-1. Home | Home page ................................................................................................................ 6–9
Figure 6-2. Home | Contact page............................................................................................................ 6–10
Figure 6-3. Home | Support page ........................................................................................................... 6–11
Figure 6-4. Admin | Access page ............................................................................................................ 6–12
Figure 6-5. Admin | SNMP page ............................................................................................................. 6–14
Figure 6-6. Config | Converter page ....................................................................................................... 6–15
Figure 6-7. Config | Ref page .................................................................................................................. 6–17
Figure 6-8. Config | Pre-selects page ...................................................................................................... 6–18
Figure 6-9. Config | Utility page .............................................................................................................. 6–19
Figure 6-10. Config | Redundancy page.................................................................................................. 6–21
Figure 6-11. Status | Summary page ...................................................................................................... 6–22
Figure 6-12. Status | Faults page ............................................................................................................ 6–23
Figure B-1. 1:1 Redundant Configuration –Single Source IF Output with IOM-XX and RSM-XX Installed ... B–4
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Figure B-2. 1:1 Redundant Configuration Diagram – Single Source IF Output with IOM-XX and RSM-XX
Installed ............................................................................................................................................ B–4
Figure B-3. 1:1 Redundant Configuration Diagram – Single Source RF Input w/IOM-XX and TSEQM-XX
Installed ............................................................................................................................................ B–4
Figure B-4. TSEQM Connection Locations................................................................................................. B–5
Figure B-5. 1:1 Redundant Configuration – Dual Source IF Output .......................................................... B–5
Figure B-6. 1:1 Redundant Configuration Diagram – Dual Source IF Output with IOM-XX and RSM-XX
Installed ............................................................................................................................................ B–5
Figure B-7. Dual Source 1:N Redundant Configuration with PSM-XX and RSM-XX Installed ................... B–6
Figure B-8. Dual Source 1:N Redundant Configuration Diagram with PSM-XX and RSM-XX Installed ..... B–7
Figure B-9. Front Panel Displays ............................................................................................................... B–8
Figure B-10. System in Auto Redundant Mode......................................................................................... B–9
Figure B-11. Backup of Downconverter #1 ............................................................................................. B–10
Figure B-12. Downconverter #1 in MANUAL, Others in AUTO ............................................................... B–11
Figure B-13. Forced Backup of Downconverter #1 ................................................................................. B–12
Figure B-14. Config | Redundancy page ................................................................................................. B–13
Figure C-1. Downconverter Signal and Interconnecting Diagram (with Transmit Switch Module [TSM]).. C–1
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PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data’s
DT-4500-A Series Downconverters. This is an informational document intended for the persons
responsible for the operation and maintenance of the DT-4500-A family of products.
Disclaimer
Comtech EF Data has reviewed this manual thoroughly to provide an easy-to-use guide to your
equipment. All statements, technical information, and recommendations in this manual and in
any guides or related documents are believed reliable, but the accuracy and completeness
thereof are not guaranteed or warranted, and they are not intended to be, nor should they be
understood to be, representations or warranties concerning the products described. Further,
Comtech EF Data reserves the right to make changes in the specifications of the products
described in this manual at any time without notice and without obligation to notify any person
of such changes.
If you have any questions regarding the equipment or the information in this manual, please
contact the Comtech EF Data Customer Support Department.
Reporting Comments or Suggestions Concerning this Manual
Comtech EF Data welcomes comments and suggestions regarding the content and design of this
manual. Contact the Comtech EF Data Technical Publications Department:
[email protected]
Conventions and References
Patents and Trademarks
See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com.
Comtech EF Data acknowledges that all trademarks are the property of the trademark owners.
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DT-4500-A Series Downconverters
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MN-DT4500A
Warnings, Cautions, and Notes
A WARNING gives information about a possible hazard that MAY CAUSE DEATH
or SERIOUS INJURY.
A CAUTION gives information about a possible hazard that MAY CAUSE INJURY
or PROPERTY DAMAGE.
A NOTE gives important information about a task or the equipment.
A REFERENCE directs the user to additional information about a task or the
equipment.
Examples of Multi-Hazard Notices
Recommended Standard Designations
The new designation of the Electronic Industries Association (EIA) supersedes Recommended
Standard (RS) designations. References to the old RS designations may be shown when depicting
actual text (e.g., RS-232) as displayed on the unit’s Web Server Interface pages or front panel
menus. All other references in the manual will be shown with the EIA designations.
Metric Conversion
Metric conversion information is provided on the inside back cover of this manual as a means to
assist the operator in cross-referencing non-Metric to Metric conversions.
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The user should carefully review the following information:
Safety and Compliance
Electrical Safety and Compliance
The unit complies with the EN 60950 Safety of Information Technology Equipment (Including
Electrical Business Machines) safety standard.
IF THE UNIT IS OPERATED IN A VEHICLE OR MOVABLE INSTALLATION, MAKE SURE
THE UNIT IS STABLE. OTHERWISE, EN 60950 SAFETY IS NOT GUARANTEED.
Electrical Installation
CONNECT THE UNIT TO A POWER SYSTEM THAT HAS SEPARATE GROUND, LINE AND
NEUTRAL CONDUCTORS. DO NOT CONNECT THE UNIT WITHOUT A DIRECT
CONNECTION TO GROUND.
Sect 3.2.1.3 Chassis Ground Stud
Operating Environment
DO NOT OPERATE THE UNIT IN ANY OF THESE EXTREME OPERATING CONDITIONS:
•
AMBIENT TEMPERATURES LESS THAN 0° C (32° F) OR MORE THAN 50° C
(122° F).
•
PRECIPITATION, CONDENSATION, OR HUMID ATMOSPHERES OF MORE
THAN 95% RELATIVE HUMIDITY.
•
UNPRESSURIZED ALTITUDES OF MORE THAN 3048 METRES (10,000 FEET).
•
EXCESSIVE DUST.
•
FLAMMABLE GASES.
•
CORROSIVE OR EXPLOSIVE ATMOSPHERES.
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DT-4500-A Series Downconverters
Preface
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MN-DT4500A
European Union Radio Equipment and Telecommunications Terminal
Equipment (R&TTE) Directive (1999/5/EC) and EN 301 489-1
Independent testing verifies that the unit complies with the European Union R&TTE Directive, its
reference to EN 301 489-1 (Electromagnetic compatibility and Radio spectrum Matters [ERM];
Electromagnetic Compatibility [EMC] standard for radio equipment and services, Part 1:
Common technical requirements), and the Declarations of Conformity for the applicable
directives, standards, and practices that follow:
European Union Electromagnetic Compatibility (EMC) Directive
(2004/108/EC)
•
Emissions: EN 55022 Class A – Limits and Methods of Measurement of Radio Interference
Characteristics of Information Technology Equipment.
•
Immunity: EN 55024 – Information Technology Equipment: Immunity Characteristics, Limits,
and Methods of Measurement.
•
EN 61000-3-2 – Harmonic Currents Emission
•
EN 61000-3-3 – Voltage Fluctuations and Flicker.
•
Federal Communications Commission Federal Code of Regulation FCC Part 15, Subpart B.
TO ENSURE THAT THE UNIT COMPLIES WITH THESE STANDARDS, OBEY THESE
INSTRUCTIONS:
•
Use coaxial cable that is of good quality for connections to the L-Band Type ‘N’ Rx (receive)
female connector.
•
Use Type 'D' connectors that have back-shells with continuous metallic shielding.
Type ‘D’ cabling must have a continuous outer shield (either foil or braid, or both). The
shield must be bonded to the back-shell.
•
Operate the unit with its cover on at all times.
European Union Low Voltage Directive (LVD) (2006/95/EC)
Symbol
Description
<HAR>
Type of power cord required for use in the European Community.
!
CAUTION: Double-pole/Neutral Fusing
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung
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DT-4500-A Series Downconverters
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MN-DT4500A
International Symbols
Symbol
Definition
Symbol
Definition
Alternating Current
Protective Earth
Fuse
Chassis Ground
For additional symbols, refer to Warnings, Cautions and Notes listed earlier in this
Preface.
European Union RoHS Directive (2002/95/EC)
This unit satisfies (with exemptions) the requirements specified in the European Union Directive
on the Restriction of Hazardous Substances in Electrical and Electronic Equipment (EU RoHS,
Directive 2002/95/EC).
E uropean Union T elec ommunic ations T erminal E quipment Direc tive
(91/263/E E C )
In accordance with the European Union Telecommunications Terminal Equipment Directive
91/263/EEC, the unit should not be directly connected to the Public Telecommunications
Network.
CE Mark
Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark.
xvii
DT-4500-A Series Downconverters
Preface
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MN-DT4500A
Warranty Policy
Comtech EF Data products are warranted against defects in material and workmanship for
a specific period from the date of shipment, and this period varies by product. In most
cases, the warranty period is two years. During the warranty period, Comtech EF Data will,
at its option, repair or replace products that prove to be defective. Repairs are warranted
for the remainder of the original warranty or a 90 day extended warranty, whichever is
longer. Contact Comtech EF Data for the warranty period specific to the product
purchased.
For equipment under warranty, the owner is responsible for freight to Comtech EF Data
and all related customs, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for
the freight charges only for return of the equipment from the factory to the owner.
Comtech EF Data will return the equipment by the same method (i.e., Air, Express,
Surface) as the equipment was sent to Comtech EF Data.
All equipment returned for warranty repair must have a valid RMA number issued prior to
return and be marked clearly on the return packaging. Comtech EF Data strongly
recommends all equipment be returned in its original packaging.
Comtech EF Data Corporation’s obligations under this warranty are limited to repair or
replacement of failed parts, and the return shipment to the buyer of the repaired or
replaced parts.
Limitations of Warranty
The warranty does not apply to any part of a product that has been installed, altered,
repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation,
would affect the reliability or detracts from the performance of any part of the product, or
is damaged as the result of use in a way or with equipment that had not been previously
approved by Comtech EF Data Corporation.
The warranty does not apply to any product or parts thereof where the serial number or
the serial number of any of its parts has been altered, defaced, or removed.
The warranty does not cover damage or loss incurred in transportation of the product.
The warranty does not cover replacement or repair necessitated by loss or damage from
any cause beyond the control of Comtech EF Data Corporation, such as lightning or other
natural and weather related events or wartime environments.
The warranty does not cover any labor involved in the removal and or reinstallation of
warranted equipment or parts on site, or any labor required to diagnose the necessity for
repair or replacement.
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DT-4500-A Series Downconverters
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The warranty excludes any responsibility by Comtech EF Data Corporation for incidental
or consequential damages arising from the use of the equipment or products, or for any
inability to use them either separate from or in combination with any other equipment or
products.
A fixed charge established for each product will be imposed for all equipment returned for
warranty repair where Comtech EF Data Corporation cannot identify the cause of the
reported failure.
Exclusive Remedies
Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties,
expressed, implied, or statutory, including those of merchantability and fitness for a
particular purpose. The buyer shall pass on to any purchaser, lessee, or other user of
Comtech EF Data Corporation’s products, the aforementioned warranty, and shall
indemnify and hold harmless Comtech EF Data Corporation from any claims or liability
of such purchaser, lessee, or user based upon allegations that the buyer, its agents, or
employees have made additional warranties or representations as to product
preference or use.
The remedies provided herein are the buyer’s sole and exclusive remedies. Comtech EF
Data shall not be liable for any direct, indirect, special, incidental, or consequential
damages, whether based on contract, tort, or any other legal theory.
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DT-4500-A Series Downconverters
Preface
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MN-DT4500A
Getting Help
Review the Warranty Policy before contacting Comtech EF Data Technical Support or
Customer Service.
Contacting Comtech EF Data
Contact Comtech EF Data for:
•
Technical Support – Product support or training.
•
Customer Service – Information on returning an in-warranty or out-of-warranty product for
upgrade or repair. Be prepared to provide the product model number and its serial
number.
Contact Comtech EF Data Customer & Technical Support during normal business hours (Monday
through Friday, 8 A.M. to 5 P.M Mountain Standard Time (MST)):
For:
DT-45xx-A
Technical
Support and
Service
Comtech EF
Data Web Site
Contact:
Telephone
+1.480.333.4357
Email
[email protected]
Fax
+1.480.333.2500
Main Page
http://www.comtechefdata.com
Customer and
Technical Support
http://www.comtechefdata.com/support.asp
RMA
(Return Material
Authorization)
http://www.comtechefdata.com/rmaform.asp
Comtech EF Data Main Number
+1.480.333.2200
Mailing Address
2114 West 7th Street
Tempe, Arizona 85281 USA
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DT-4500-A Series Downconverters
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Returning a Product for Upgrade or Repair
Step
Task
1
Go to the Comtech EF Data Home page (http://www.comtechefdata.com). From the
SUPPORT column at the bottom of the page, select the Service hyperlink, and read
the Return Material Authorization section in its entirety.
2
Request a Return Material Authorization Number:
• On the Comtech EF Data Home page: From the SUPPORT column at the bottom
of the page, select the RMA Request hyperlink;
OR
• On the Comtech EF Data Support page: Click [Send RMA Request];
OR
• On the Comtech EF Data Service page: Select the Return Material
Authorization hyperlink;
• Fill out the RMA form completely;
• Click [Send Email].
Alternately:
• Send an e-mail providing this same detailed information to Comtech EF Data
Customer Service ([email protected]).
• Contact Comtech EF Data Customer & Technical Support by phone or fax.
3
Pack the product in its original shipping carton and protective packaging.
4
Ship the product back to Comtech EF Data. Shipping charges should be prepaid.
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MN-DT4500A
Notes:
xxii
Chapter 1. INTRODUCTION
1.1
Overview
Figure 1-1. DT-4500-A Series Downconverters (DT-4503-A shown)
Comtech EF Data’s DT-4500-A Series Downconverters (Figure 1-1) are designed for the
transmission of SCPC, DAMA and TDMA signals in communication systems or satellite downlink
data systems. The Downconverters can also be used in communications system applications
with full transponder HDTV and analog TV.
The DT-4500-A Series Downconverter family of products comprises:
• DT-4503-A
• DT-4510-A
• DT-4513-A
• DT-4503/C-A
• DT-4510/D-A
• DT-4513/E-A
• DT-4503/D-A
• DT-4511-A
• DT-4503/E-A
• DT-4512-A
• DT-4512/E-A
Individual model specifications are included in this chapter.
1–1
DT-4500A Series Downconverters
Introduction
1.2
Revision 1
MN-DT4500A
Functional Description
Figure 1-2 shows the DT-4500-A chassis with its top cover removed. The major chassic
components and module assemblies are:
•
Signal Path Module
•
Step Loop Module
•
Monitor & Control Assembly
•
I/O Switch Module (not shown – installs into rear chassis slot)
•
Reference Oscillator Assembly
•
Sum Loop Module
•
Power Supply Assembly
Figure 1-2. DT-4500-A Series Downconverter Physical Configuration
1–2
DT-4500A Series Downconverters
Introduction
1.2.1
Revision 1
MN-DT4500A
Applications
The downconverter operates over the RF frequency range with a typical gain of 35 dB. The RF
output level is +10 dBm at 1 dB compression allowing the capability for longer cable runs to
compensate for splitting networks without adding options such as external line amplifiers.
The phase noise performance exceeds the Intelsat phase noise mask for IBS and IDR services by
more than 9 dB. This allows high capacity earth stations to add more demodulators and still
meet transmission standards. The close-in phase noise is also very low. This makes the
downconverter ideal for low bit rate digital circuits such as used in DAMA hub earth stations.
A selectable EIA-232C or EIA-485 remote control serial communications connector interface is
provided on the rear of the downconverter. All configuration control, status retrieval and
adjustments are available as ASCII commands through the serial interface, or as local operator
input command to the downconverter.
A detachable Input/Output Module (IOM) can be mounted in the rear of the downconverter
chassis for switching the RF output for single thread operations, or for testing the output of the
unit. The connectors for the IOM are located on the rear panel.
In applications where downconverters are "Daisy Chained" together to provide distributed
online protection switching to a backup downconverter, the IOM is replaced with a detachable
Transmit Switch Module (TSM). The TSM contains RF and IF transfer switches. Type N
connectors are provided for the RF loop, and 50 or 75 ohms BNC connectors are provided for
the IF loop.
The "Daisy Chain" configuration is designed to chain the IF output of up to twelve (12) online
downconverters together through RSM's terminating in a backup downconverter. When a fault
occurs in an online downconverter, the RSM in the downconverter with the fault is commanded
to switch to the backup downconverter.
The backup downconverter performs the fault detection, self-reconfiguration and the logical
switching functions. If the backup downconverter has a fault, it will not attempt to perform the
protection-switching task. If the backup downconverter does not have a fault, it will assume the
frequency and attenuation of the faulted online downconverter, and compensate for the chain
losses.
The backup downconverter in the "Daisy Chain" communicates with the online downconverters
through a high speed (data interface) bus (HSB). When faults are detected, the backup
downconverter re-configures itself to replace the online downconverter with the fault. The
backup downconverter also uses the HSB to monitor configuration changes made to the online
downconverters by either remote control or front panel command inputs.
Changes in frequency, attenuation or polarity are entered into the backup table as they are
made, as well as information from new online units. The HSB does not interfere with the remote
control communications link for access to any of the downconverters in the "Daisy Chain".
1–3
DT-4500A Series Downconverters
Introduction
1.2.2
Revision 1
MN-DT4500A
RF Signal Conversion
As a typical example of the RF signal processing, the RF input to the DT-4512-A Downconverter
is 12200 to 12750 MHZ at a typical level of -45 dBm. The RF is mixed in the first mixer with a
13280 to 13830 MHZ synthesizer signal from a multiplier, in 125 KHz fine tuning steps. The
synthesizer is locked to a 5/10 MHZ reference oscillator. The first mixer is located in the
downconverter Signal Path Module, and the synthesizer consists of a Coarse/Fine Step Module
and a Sum Loop Module.
The intermediate IF is 1080 MHZ which is mixed in the second mixer with the1150 MHZ IFLO
providing a +20 dBm, at 1 dB compression, 70 MHZ IF output. The second mixer is also located in
the downconverter Signal Path Assembly.
Figure 1-6 depicts the operational schematic for a typical DT-4500-A Series Downconverter in
single thread (standalone) applications. For more information about the DT-4500-A’s use in
redundant applications, refer to Appendix B. REDUNDANT SYSTEM OPERATION.
Figure 1-3. Typical Functional Block Diagram (DT-4512-A shown)
1.2.3
Monitor & Control
The Monitor & Control Assembly is designed to monitor the functions of the downconverter,
and provide the control for remote and local command inputs to the downconverter.
1–4
DT-4500A Series Downconverters
Introduction
Revision 1
MN-DT4500A
Remote control inputs are provided through the EIA-232C or EIA-485 communications port on
the rear of the panel, or by local operator inputs through the keypad on the front panel.
Local operator input commands and the status of the downconverter are displayed on the front
panel Vacuum Fluorescent Display (VFD) on the front panel.
A downconverter fault is indicated by the LED indicator on the front panel. Specific fault
conditions are displayed on the VFD through local keypad input commands.
1.3
1.3.1
Downconverter Features
Physical Description
The DT-4500-A Series Downconverter’s 1RU-high (1.75”) 19-inch wide chassis is designed for
rack mounting into a standard 19-inch (48.26 cm) equipment rack. Handles installed on the front
panel provide ease of installation into and removal from the equipment rack. The unit may also
be mounted into the rack using the provided slide mechanisms to allow service without removal
from the rack.
For:
See:
•
Rack installation and mounting
instructions
Chapter 2. INSTALLATION
•
Local operating instructions and
procedures
Chapter 5. FRONT PANEL OPERATION
•
Remote control operating
instructions and procedures
Chapter 6. ETHERNET-BASED REMOTE
PRODUCT MANAGEMENT and
Appendix A. REMOTE CONTROL
•
Redundant system operating
instructions and procedures
Appendix B. REDUNDANT SYSTEM
OPERATION
•
Maintenance and
troubleshooting procedures
Appendix C. MAINTENANCE AND
TROUBLESHOOTING
1–5
DT-4500A Series Downconverters
Introduction
1.3.2
Revision 1
MN-DT4500A
Dimensional Envelope
Dimensions are shown in inches and [millimeters].
Figure 1-4. DT-4500-A Series Downconverter Dimensional Envelope
1–6
DT-4500A Series Downconverters
Introduction
1.3.3
Revision 1
MN-DT4500A
Downconverter Physical Features
1.3.3.1
Front Panel
Figure 1-5. DT-4500-A Series Downconverter Front Panel
Figure 1-4 shows the typical front panel of the DT-4500-A Series Downconverters. This example
depicts the DT-4503-A Downconverter. All operator controls, indicators and displays for local
and remote operation are located on the front panel of the DT-4500-A. The front panel features
(from left):
1.3.3.2
•
Two Test Point Sample Ports – The test point connections are used for monitoring the
RF input and the IF output. An SMA connector provides the RF input, and a BNC
connector provides the IF output. There is also an optional RF LO monitor available that
replaces the RF monitor.
•
Six Light-Emitting Diode (LED) Indicators – The LEDs indicate, in a summary fashion, the
status of the unit.
•
Vacuum Fluorescent Display (VFD) – The VFD is an active display showing two lines of
24 characters each. Each configuration function, or operating mode, is shown on the
display when the operator enters a command using the keypad.
•
Six-button Keypad – The keypad comprises six individual keyswitches. They have a
positive ‘click’ action, which provides tactile feedback.
Rear Panel
Figure 1-6. DT-4500-A Series Downconverter Rear Panel
Figure 1-5 shows the typical rear panel of the DT-4500-A Series Downconverters. This example
depicts a DT-4503-A Downconverter with the Input/Output Module, or IOM, installed. The rear
panel features (from left):
1–7
DT-4500A Series Downconverters
Introduction
1.4
Revision 1
MN-DT4500A
•
Prime Power Switch – The on/off prime power switch is located on the rear of the
chassis adjacent to the prime power input connector. The power switch contains a filter
and dual fuse. The dual fuse is rated for 2 Amps. The DT-4500A is provided with a sixfoot AC power cord.
•
Exhaust Fan – The internally mounted exhaust fan vents through the rear panel for
chassis cooling.
•
External Interface Connectors – Connectors provide operational communications,
connection of external reference, redundant operation, and remote monitor and control
of the DT-4500-A.
Summary of Specifications
*Note: Contact Comtech EF Data with specific requirements.
1.4.1
DT-4503/C-A C-Band Downconverter
Characteristic
Frequency Range
RF Input
IF Output
Transfer
Specification
DT-4503/C-A
Conversion
Step Size
Preset Channels
Stability over Time
Stability Over Temp
Noise Figure
Level
Impedance
Return Loss
Output Level
Range
Intermodulation
Non-carrier Spurious
Carrier Spurious
Return Loss
Impedance
Gain
Attenuation Adjust
Gain Stability
Ripple
Slope
Image Rejection
AM to PM
IF Bandwidth
3400-4200 MHz
Dual, No Inversion
125 kHz standard, 1kHz optional
32 Frequencies
± 1 x 10-9 /Day
± 1 x 10-8 0-50°C (32-122°F)
11 dB Maximum at 0 dB Attenuation
-45 dBm Typical
50Ω
20 dB min. with RF/IF Connector Module
+20 dBm at 1 dB Compression
52-88 or 104-176 MHz (optional 50-80 MHz or 100-180 MHz – see *Note)
-60 dBc @ 0 dBm Output SCL
-80 dBm
-65 dBc @ 0 dBm Output
23 dB Minimum
50Ω or 75Ω
45 dB ± 2 dB
0-20 in 0.25 dB Steps
0.1 dB Steps Optional
± 0.25 dB/Day
70MHz IFCF: ±0.25 dB (±18 MHz), optional ±20 MHz (see *Note)
140 MHz IFCF: 0.75 dB (±36 MHz), optional ±40 MHz (see *Note)
0.05 dB/MHz
-80 dB Inband
0.1o. / dB for Output up to –5 dBm
36 or 72 MHz, optional 40 or 80 MHz (see *Note)
1–8
DT-4500A Series Downconverters
Introduction
Revision 1
MN-DT4500A
Characteristic
Specification
External Reference
Input 5 or 10 MHz @ +3 dBm
Optional 10 MHz Rear Panel Reference Output
0.03 ns/MHz
0.01 ns/MHz2
1.0 ns Peak-to-Peak
Limit (dBc/Hz)
Typical (dBc/Hz)
-80
-83
-89
-92
-95
-97
-105
-109
-120
-124
Comm Port EIA-485 or EIA-232
Group Delay
Linear Group Delay
Parabolic Delay
Group Delay Ripple
Phase Noise
Parameter
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Remote Control (Rear Panel)
LED Indicators
(Front Panel)
Test Points
(Front Panel)
Power
Environmental
Power On
Output Enable
Remote
On Line
Fault
Stored Fault
RF Sample
IF Sample
Optional L.O. Sample
Voltage
Green LED
Yellow LED
Yellow LED
Yellow LED
Red LED
Red LED
Type ‘SMA’ Connector, -20 dBc Nominal
Type ‘BNC’ Connector, -20 dBc Nominal
Frequency
47-63 Hz
Dissipation
60 Watts
-48 VDC
0-50°C (32-122° F)
Power Option
Temperature
Altitude
Physical
MTBF
90-250 VAC
Humidity
Width
10,000 Feet MSL
0-95 % Relative
19 Inches (48.26 cm)
Height
1RU 1.75 Inches (4.44 cm)
Depth
22 Inches (55.88 cm)
15 Pounds (7.00 kg)
49,740 hrs. (calculated)
>100,000 hrs. (field experience)
Form C
Weight
Summary Alarm Relay Closure
1–9
DT-4500A Series Downconverters
Introduction
1.4.2
Revision 1
MN-DT4500A
DT-4503/E-A C-Band Downconverter
Characteristic
Frequency Range
RF Input
IF Output
Transfer
DT-4503/E-A
Conversion
Step Size
Preset Channels
Stability over Time
Stability Over Temp
Noise Figure
Level
Impedance
Return Loss
Output Level
Range
Intermodulation
Non-carrier Spurious
Carrier Spurious
Return Loss
Impedance
Gain
Attenuation Adjust
Gain Stability
Ripple
External Reference
Group Delay
Slope
Image Rejection
AM to PM
IF Bandwidth
Linear Group Delay
Parabolic Delay
Group Delay Ripple
Phase Noise
Parameter
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Remote Control (Rear Panel)
LED Indicators
Power On
(Front Panel)
Output Enable
Remote
On Line
Fault
Stored Fault
Specification
4500-4800 MHz
Dual, No Inversion
125 kHz standard, 1kHz optional
32 Frequencies
± 1 x 10-9 /Day
± 1 x 10-8 0-50°C (32-122°F)
11 dB Maximum at 0 dB Attenuation
-45 dBm Typical
50Ω
20 dB min. with RF/IF Connector Module
+20 dBm at 1 dB Compression
52-88 or 104-176 MHz, optional 50-80 MHz or 100-180 MHz (see *Note)
-60 dBc @ 0 dBm Output SCL
-80 dBm
-65 dBc @ 0 dBm Output
23 dB Minimum with RF/IF Connector Module
50Ω or 75Ω
45 dB ± 2 dB
0-20 in 0.25 dB Steps
0.1 dB Steps Optional
± 0.25 dB/Day
70MHz IFCF: ±0.25 dB (±18 MHz), optional ±20 MHz (see *Note)
140 MHz IFCF: 0.75 dB (±36 MHz), optional ±40 MHz (see *Note)
0.05 dB/MHz
-80 dB Inband
0.1o. / dB for Output up to –5 dBm
36 or 72 MHz, optional 40 or 80 MHz (see *Note)
Input 5 or 10 MHz @ +3 dBm
Optional 10 MHz Rear Panel Reference Output
0.03 ns/MHz
0.01 ns/MHz2
1.0 ns Peak-to-Peak
Limit (dBc/Hz)
Typical (dBc/Hz)
-80
-83
-89
-92
-95
-97
-105
-109
-120
-124
Comm Port EIA-485 or EIA-232
Green LED
Yellow LED
Yellow LED
Yellow LED
Red LED
Red LED
1–10
DT-4500A Series Downconverters
Introduction
Characteristic
Test Points
(Front Panel)
Power
Specification
RF Sample
Type ‘SMA’ Connector, -20 dBc Nominal
IF Sample
Type ‘BNC’ Connector, -20 dBc Nominal
Optional L.O. Sample
Voltage
90-250 VAC, Autoranging
Frequency
47-63 Hz
Dissipation
Environmental
Power Option
Temperature
Altitude
Physical
MTBF
Revision 1
MN-DT4500A
60 Watts
-48 VDC
0-50°C (32-122° F)
Humidity
Width
10,000 Feet MSL
0-95 % Relative
19 Inches (48.26 cm)
Height
1RU 1.75 Inches (4.44 cm)
Depth
22 Inches (55.88 cm)
15 Pounds (7.00 kg)
49,740 hrs.
(calculated)
>100,000 hrs. (field experience)
Form C
Weight
Summary Alarm Relay Closure
1–11
DT-4500A Series Downconverters
Introduction
1.4.3
Revision 1
MN-DT4500A
DT-4503-A, /D-A, /E-A C-Band Downconverters
Characteristic
Frequency Range
RF Input
IF Output
Transfer
DT-4503-A
DT-4503/D-A
DT-4503/E-A
Conversion
Step Size
Preset Channels
Stability over Time
Stability Over Temp
Noise Figure
Level
Impedance
Return Loss
Output Level
Range
Intermodulation
Non-carrier Spurious
Carrier Spurious
Return Loss
Impedance
Gain
Attenuation Adjust
Gain Stability
Ripple
Slope
Image Rejection
AM to PM
IF Bandwidth
Specification
3625-4200 MHz
3400-3700 MHz
See Sect. 1.4.2
Dual, No Inversion
125 kHz standard, 1kHz optional
32 Frequencies and Gains
± 1 x 10-9 /Day
± 1 x 10-8 0-50°C (32-122°F)
11 dB Maximum at 0 dB Attenuation
-45 dBm Typical
50Ω
20 dB min. with RF/IF Connector Module
+20 dBm at 1 dB Compression
52-88 or 104-176 MHz), optional 50-80 MHz or 100-180 MHz (see *Note)
-60 dBc @ 0 dBm Output SCL
-80 dBm
-65 dBc @ 0 dBm Output
23 dB Minimum with RF/IF Connector Module or SW Module
50Ω or 75Ω
45 dB ± 2 dB
0-20 in 0.25 dB Steps
0.1 dB Steps Optional
± 0.25 dB/Day
70MHz IFCF: ±0.25 dB (±18 MHz), optional ±20 MHz (see *Note)
140 M Hz I FCF: 0.75 dB (±36 MHz), optional ±40 MHz (see *Note), 10.05
dB/MHz
0.05 dB/MHz
-80 dB Inband
0.1o. / dB for Output up to –5 dBm
36 or 72 MHz, optional 40 or 80 MHz (see *Note)
External Reference
Input 5 or 10 MHz @ +3 dBm
Optional 10 MHz Rear Panel Reference Output
Group Delay
0.03 ns/MHz
0.01 ns/MHz2
1.0 ns Peak-to-Peak
Limit (dBc/Hz)
-80
-89
-95
-105
-120
Comm Port EIA-485 or EIA-232
Linear Group Delay
Parabolic Delay
Group Delay Ripple
Phase Noise
Parameter
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Remote Control (Rear Panel)
1–12
Typical (dBc/Hz)
-83
-92
-97
-109
-124
DT-4500A Series Downconverters
Introduction
Characteristic
LED Indicators
(Front Panel)
Test Points
(Front Panel)
Power
Environmental
Power On
Receive
Remote
On Line
Fault
Stored Fault
RF Sample
IF Sample
Optional L.O. Sample
Voltage
MTBF
Specification
Green LED
Yellow LED
Yellow LED
Yellow LED
Red LED
Red LED
Type ‘SMA’ Connector, -20 dBc Nominal
Type ‘BNC’ Connector, -20 dBc Nominal
90-250 VAC Autoranging
Frequency
47-63 Hz
Dissipation
60 Watts
-48 VDC
0-50°C (32-122° F)
Power Option
Temperature
Altitude
Physical
Revision 1
MN-DT4500A
Humidity
Width
10,000 Feet MSL
0-95 % Relative
19 Inches (48.26 cm)
Height
1RU 1.75 Inches (4.44 cm)
Depth
22 Inches (55.88 cm)
15 Pounds (7.00 kg)
49,740 hrs. (calculated)
>100,000 hrs. (field experience)
Form C
Weight
Summary Alarm Relay Closure
1–13
DT-4500A Series Downconverters
Introduction
1.4.4
Revision 1
MN-DT4500A
DT-4510-A, /D-A, DT-4511-A, DT-4512-A, /E -A K u-B and Downconverters
Characteristic
Frequency Range
RF Input
IF Output
Transfer
DT-4510-A
DT-4510D-A
DT-4511-A
DT-4512-A
DT-4512E-A
Conversion
Step Size
Preset Channels
Stability over Time
Stability Over Temp
Noise Figure
Level
Impedance
Return Loss
Output Level
Range
Intermodulation
Non-carrier Spurious
Carrier Spurious
Return Loss
Impedance
Gain
Attenuation Adjust
Gain Stability
Ripple
External Reference
Group Delay
Slope
Image Rejection
AM to PM
Linear Group Delay
Parabolic Delay
Group Delay Ripple
Phase Noise
Parameter
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Remote Control (Rear Panel)
LED Indicators
Power On
(Front Panel)
Receive
Remote
Specification
10.95-11.70 GHz
10.70-11.70 GHz
11.70-12.20 GHz
12.20-12.75 GHz
12.50-12.80 GHz
Dual, No Inversion
125 kHz standard, 1kHz optional
32 Frequencies and Gains
± 1 x 10-9 /Day
± 1 x 10-8 0-50°C (32-122°F)
11 dB Maximum at 0 dB Attenuation
-45 dBm Typical
50Ω
20 dB min. with IO Module
+20 dBm at 1 dB Compression
52-88 or 104-176 MHz
-60 dBc @ 0 dBm Output SCL
-80 dBm
-65 dBc @ 0 dBm Output
23 dB Minimum with IO Module
50Ω or 75Ω
45 dB ± 2 dB
0-20 in 0.25 dB Steps
0.1 dB Steps Optional
± 0.25 dB/Day
70MHz IFCF: ±0.25 dB (±18 MHz)
140 MHz IFCF: 0.75 dB (±36 MHz)
0.05 dB/MHz
-80 dB Inband
0.1o. / dB for Output up to –5 dBm
Input 5 or 10 MHz @ +3 dBm
Optional 10 MHz Rear Panel Reference Output
0.03 ns/MHz
0.01 ns/MHz2
1.0 ns Peak-to-Peak
Limit (dBc/Hz)
Typical (dBc/Hz)
-72
-79
-79
-82
-89
-92
-98
-101
-110
-114
Comm Port EIA-485 or EIA-232
Green LED
Yellow LED
Yellow LED
1–14
DT-4500A Series Downconverters
Introduction
Characteristic
Test Points
(Front Panel)
Power
Environmental
Physical
MTBF
On Line
Fault
Stored Fault
RF Sample
IF Sample
Optional L.O. Sample
Voltage
Frequency
Dissipation
Power Option
Temperature
Altitude
Humidity
Width
Height
Depth
Weight
Summary Alarm Relay Closure
Revision 1
MN-DT4500A
Specification
Yellow LED
Red LED
Red LED
Type ‘SMA’ Connector, -20 dBc Nominal
Type ‘BNC’ Connector, -20 dBc Nominal
90-250 VAC Autoranging
47-63 Hz
60 Watts
-48 VDC
0-50°C (32-122° F)
10,000 Feet MSL
0-95 % Relative
19 Inches (48.26 cm)
1RU 1.75 Inches (4.44 cm)
22 Inches (55.88 cm)
15 Pounds (7.00 kg)
49,740 hrs. (calculated)
>100,000 hrs. (field experience)
Form C
1–15
DT-4500A Series Downconverters
Introduction
1.4.5
Revision 1
MN-DT4500A
DT-4513-A, /E-A Ku-Band Downconverters
Characteristic
Frequency Range
RF Input
IF Output
Transfer
DT-4513-A
DT-4513/E-A
Conversion
Step Size
Preset Channels
Stability over Time
Stability Over Temp
Noise Figure
Level
Impedance
Return Loss
Output Level
Range
Intermodulation
Non-carrier Spurious
Carrier Spurious
Return Loss
Impedance
Gain
Attenuation Adjust
Gain Stability
Ripple
External Reference
Group Delay
Slope
Image Rejection
AM to PM
Linear Group Delay
Parabolic Delay
Group Delay Ripple
Phase Noise
Parameter
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Remote Control (Rear Panel)
LED Indicators
Power On
(Front Panel)
Receive
Remote
On Line
Fault
Stored Fault
Specification
10.95-12.75 GHz
10.70-12.75 GHz
Dual, No Inversion
125 kHz standard, 1kHz optional
32 Frequencies
± 1 x 10-9 /Day
± 1 x 10-8 0-50°C (32-122°F)
11 dB Maximum at 0 dB Attenuation
-45 dBm Typical
50Ω
20 dB min. with RF/IF Connector Module
+20 dBm at 1 dB Compression
52-88 or 104-176 MHz
-60 dBc @ 0 dBm Output SCL
-80 dBm
-65 dBc @ 0 dBm Output
23 dB Minimum with IO Module
50Ω or 75Ω
45 dB ± 2 dB
0-20 in 0.25 dB Steps
0.1 dB Steps Optional
± 0.25 dB/Day
70MHz IFCF: ±0.25 dB (±18 MHz)
140 MHz IFCF: 0.75 dB (±36 MHz)
0.05 dB/MHz
-80 dB Inband
0.1o. / dB for Output up to –5 dBm
Input 5 or 10 MHz @ +3 dBm
Optional 10 MHz Rear Panel Reference Output
0.03 ns/MHz
0.01 ns/MHz2
1.0 ns Peak-to-Peak
Limit (dBc/Hz)
Typical (dBc/Hz)
-66
-69
-76
-79
-86
-89
-96
-99
-106
-109
Comm Port EIA-485 or EIA-232
Green LED
Yellow LED
Yellow LED
Yellow LED
Red LED
Red LED
1–16
DT-4500A Series Downconverters
Introduction
Characteristic
Test Points
(Front Panel)
Power
Environmental
Physical
MTBF
RF Sample
IF Sample
Optional L.O. Sample
Voltage
Frequency
Dissipation
Power Option
Temperature
Altitude
Humidity
Width
Height
Depth
Weight
Summary Alarm Relay Closure
Revision 1
MN-DT4500A
Specification
Type ‘SMA’ Connector, -20 dBc Nominal
Type ‘BNC’ Connector, -20 dBc Nominal
90-250 VAC Autoranging
47-63 Hz
60 Watts
-48 VDC
0-50°C (32-122° F)
10,000 Feet MSL
0-95 % Relative
19 Inches (48.26 cm)
1RU 1.75 Inches (4.44 cm)
22 Inches (55.88 cm)
15 Pounds (7.00 kg)
49,740 hrs. (calculated)
>100,000 hrs. (field experience)
Form C
1–17
DT-4500A Series Downconverters
Introduction
Revision 1
MN-DT4500A
Notes:
1–18
Chapter 2. INSTALLATION
2.1
Unpacking and Inspecting the Shipment
Figure 2-1. Unpacking and Inspecting the Shipment
The DT-4500-A Series Downconverter and its Installation and Operation Manual, and its power
cord were packaged and shipped in a reusable cardboard carton containing protective foam
spacing.
2–1
DT-4500-A Series Downconverters
Installation
Revision 1
MN-DT4500A
This equipment contains parts and assemblies sensitive to damage by Electrostatic
Discharge (ESD). Use ESD precautionary procedures when handling the equipment.
Once opened, inspect the shipment (Figure 2-1):
Step
2.2
Task
1
Keep all shipping materials for storage or reshipment.
2
Check the packing list to ensure the shipment is complete.
3
Inspect the equipment for any possible damage incurred during shipment. Contact
the carrier and Comtech EF Data immediately to submit a damage report if damage is
evident.
4
Review this DT-4500A Series Downconverter Installation and Operation
Manual carefully to become familiar with operation.
5
Proceed to Sect. 2.2 Installing into a Rack Enclosure.
Installing into a Rack Enclosure
When mounting the DT-4500-A into a rack enclosure (Figure 2-2):
•
PROPER GROUNDING PROTECTION IS REQUIRED. The equipment must be
connected to the protective earth connection at all times. It is therefore imperative
that the unit is properly grounded, using the ground stud provided on the unit rear
panel, during installation, configuration, and operation.
•
PROPER AIR VENTILATION IS REQUIRED. In a rack system where there is high
heat discharge, provide forced-air cooling with top- or bottom-mounted fans or
blowers.
o
Make sure there is adequate clearance inside the enclosure, especially at
the side for air ventilation.
o
Air temperature inside the rack enclosure should never exceed 50°C
(122°F).
For information about custom rack enclosures, contact Comtech EF Data
Customer Support during normal business hours or visit Comtech EF Data’s Web
site (www.comtechefdata.com/support.asp).
2–2
DT-4500-A Series Downconverters
Installation
Feature
Revision 1
MN-DT4500A
Description
1
Custom Rack Enclosure
2
DT-4500-A Series Downconverter
3
Standard Rack Shelving
Rack Enclosure Threaded Front
Mounting Rail (typical)
4
5
Unit Front Panel
6
User-supplied Screws
Figure 2-2. Installing into a Rack Enclosure
Mount the DT-4500-A in its assigned position in the rack enclosure. Use, as required:
•
A standard rack-mounted shelf;
•
User-supplied screws to secure the front panel to the rack enclosure threaded front
mounting rails;
•
Comtech EF Data’s optional KT/6228-2 (4”) or KT/6228-3 (10”) Rear-Mounting Support
Brackets Kit (Figure 2-3).
•
Comtech EF Data’s provided FP/SL0006 (26”) or FP/SL0008 (24”) Bearingless Rack Slide
Set (Figure 2-4).
2–3
DT-4500-A Series Downconverters
Installation
Revision 1
MN-DT4500A
2.2.1 Installing the Optional Rear-Mounting Support Brackets Kit
Item
Feature
Description
1
Back of Unit
2
Rack Enclosure Threaded Rear Mounting Rail (typical)
Kit / Quantity
Part Number
Description
2
HW/10-32SHLDR
Shoulder Screw, #10
4
4
HW/10-32FLT
Flat Washer, #10
3
2
2
HW/10-32SPLIT
Lock Washer, #10
4
2
2
HW/10-32HEXNUT
Hex Nut, #10
5
4
4
HW/10-32x1/2RK
Bolt, #10, Rear Support Bracket
2
–
FP/6138-2
Bracket, Rear Support – 4”
–
2
FP/6138-3
Bracket, Rear Support – 10”
KT/6228-2
KT/6228-3
1
2
2
6
Figure 2-3. Installing the Optional Rear-Mounting Support Brackets Kit
Tools needed to install the KT/6228-2 (4”) or KT/6228-3 (10”) Bracket Kit (Figure 2-3):
1.
•
A medium Phillips screwdriver
•
A 5/32-inch SAE Allen Wrench
•
An adjustable Crescent wrench.
2–4
DT-4500-A Series Downconverters
Installation
Revision 1
MN-DT4500A
Follow these steps to install the CEFD-style chassis kit:
Step
Task
1
Use the #10 flat washers, #10 split washers, and #10 hex nuts to secure the #10
shoulder screws to the CDM-800 chassis through the rear right and left side mounting
slots.
2
Use the #10 rack bracket bolts to install the rear support brackets onto the rack
enclosure threaded rear mounting rails.
3
Mount the unit into the rack enclosure. Ensure that the shoulders of the #10 shoulder
screws properly engage into the rear support bracket slots.
2–5
DT-4500-A Series Downconverters
Installation
Revision 1
MN-DT4500A
2.2.2 Installing the Bearingless Rack Slide Sets
If the converter is to be mounted on slides, install the provided bearingless rack slide set into
the rack cabinet, and onto the sides of the DT-4500-A. Use the hardware provided with the slide
set that is determined to be appropriate for installation:
CEFD Part Number
Description
FP/SL0006
Bearingless Rack Slide Set – 26”
FP/SL0008
Bearingless Rack Slide Set – 24”
Per Figure 2-4, install either of these slide sets as follows:
Step
Procedure
1
Using the provided mounting hardware, install one slide onto each side of the DT4500-A chassis.
2
Using the provided mounting hardware, install the slide rail components into each
side of the rack cabinet.
3
Mount the unit into the equipment rack, ensuring that the slides properly engage
the cabinet-mounted slide rails.
4
Slide the converter into the rack cabinet until the front panel’s back surfaces abut
the rack cabinet’s front mounting rails.
5
Secure the converter to the rack cabinet front mounting rails using four userprovided screws installed through the front panel mounting slots.
Figure 2-4. Optional Bearingless Rack Slide Installation (FP/SL000X)
2–6
DT-4500-A Series Downconverters
Installation
2.3
Revision 1
MN-DT4500A
Connect Prime Power Connection
The detachable power cord mates with the AC Prime power receptacle on the rear of the
converter chassis. A power cord for connection to 90-125 VAC or 205-240 VAC power sources is
provided with the converter.
2.4
Connect External Cables
Proceed to connect all external cables to the connectors outlined in the next chapter (Chapter 3.
REAR PANEL CONNECTIONS). Should difficulties occur, call Comtech EF Data Customer Support
for assistance.
2–7
DT-4500-A Series Downconverters
Installation
Revision 1
MN-DT4500A
Notes:
2–8
Chapter 3. REAR PANEL
CONNECTORS
3.1
Rear Panel Overview
Figure 3-1 shows the DT-4500-A Series downconverter rear panel and its accessible connectors.
This example depicts a DT-4503-A Downconverter equipped with an Input/Output Module, or
IOM.
Table 3-1 summarizes these connectors, which provide all necessary external connections
between the downconverter and other equipment. Detailed information about each connector
follows.
Figure 3-1. DT-4500-A Rear Panel (DT-4503-A with Input/Output Module [IOM-XX Shown)
3–1
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2
Revision 1
MN-DT4500A
DT-4500-A External Connectors
Table 3-1. DT-4500-A Rear Panel External Connections
Location
(Chapter
Sect.)
Ref Des /
Connector Name
Chapter
Subsect.
Prime Power
MAIN
CHASSIS
(3.2.1)
MODULE
(3.2.2)
3.2.1
J2A | REF IN
J2B | REF OUT
Ethernet
P1 | RELAY
J1 | COM1
Chassis Ground
J3 | HSB
J4 | IF
J6 | LP IN
J8 | LP OUT
J5 | RF
3.2.1.1
3.2.1.2
3.2.1.3
3.2.1.4
3.2.1.5
3.2.1.6
3.2.1.7
3.2.1.8
3.2.2.1
3.2.2.2
Description
AC Prime Power Input (AC POWER)
Optional –48 VDC Prime Power Input (DC POWER)
External Reference Oscillator Input
Optional External Reference Oscillator Output
100BASE-TX Ethernet Management port (Telnet, SNMP)
Summary Fault Output
Serial Communications Interface for EIA-485/232 COMM links
#10-32UNC Stud
High Speed Bus
Converter IF Input
IF TSM Switching Loop Input
IF TSM Switching Loop Output
Converter RF Output
Chassis-mounted Connectors
3.2.1.1
AC Power IEC Line Input Connector Module
The 3-prong IEC line input connector module (IEC-60320 style C14)
contains the ON/OFF switch for the unit. It is also fitted with two fuses,
one each for line and neutral connections (or L1, L2 where
appropriate). The fuses are contained in a fuse holder that is press-fit
into the body of the connector.
A standard, detachable, non-locking, 3-socket power cord (IEC-60320 style C13 plug) supplies
the Alternating Current (AC) power to the DT-4500-A.
Note the following:
AC Power Specifications
Input Power
75W maximum, less than 65W typical
Input Voltage
90-260VAC
Connector Type
IEC-603320 Style C13/C14
Fuse Protection
Use (2) T2.0A 20mm slow-blow fuses.
For continued operator safety, always replace the fuses with the correct type
and rating.
3–2
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2.1.2
Revision 1
MN-DT4500A
Optional DC Power Connection
A standard 2-circuit terminal block, on/off switch, and fuse holder
supply the optional Direct Current (DC) power to the DT-4500-A.
Note the following:
DC Power Specifications
Input Power
75W maximum, less than 65W typical
Input Voltage
36 to 72 VDC
Connector Type
2-circuit Terminal Block
Fuse Protection
Use (2) 3.15A 20mm slow-blow fuses.
For continued operator safety, always replace the fuses with the correct type
and rating.
3.2.1.3
J2A | REF IN, External Reference Input Connector (BNC-F)
The J2A | REF IN (External Reference Input) connector is a ‘BNC’ female connector
that supplies a master reference to the entire chassis. The user-supplied input signal is
used for phase-locking the internal 10MHz reference oscillator to a user-provided 5 or
10 MHz station clock. The impedance is matched for 50/75Ω, and requires an input
level of 0 ±5 dBm.
3.2.1.4
J2B | REF OUT, External Reference Output Connector (BNC-F)
The optional J2B | REF OUT (External Reference Output) connector is a ‘BNC’ female
connector that provides a 10 MHz reference for customer use. The impedance is
matched for 50/75Ω, and provides an output level of 5 ±3 dBm.
3–3
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2.1.5
Revision 1
MN-DT4500A
100BASE-TX Ethernet M&C Port (RJ-45)
This is a standard RJ-45 female connector used for management via Telnet, SNMP,
and HTTP. It is also used for updating DT-4500-A firmware. This receptacle uses a
CAT5 Ethernet cable for connection to an Ethernet hub, router, switch, PC, etc.
Table 3-2. Ethernet M&C Interface Connector Pinout
3.2.1.6
Pin #
Description
Direction
1
Tx+
Out
2
TX-
Out
3
Rx+
In
4
N/A
5
N/A
6
Rx-
In
P1 | RELAY, Summary Fault Output Connector (DB-9F)
The P1 | RELAY summary fault output connector is a 9-pin Type "D" (DB9F) connector. The mating connector is a DB-9M connector.
Table 3-3. P1 | RELAY Summary Fault Connector Pinout
Pin #
Description
1
Summary Fault NC
2
Summary Fault NO
3
4
5
Ground
6
Summary Fault COM
7
EXT_FLT_IN#
Notes
1. Pin 1 to Pin 6: Fault
2. Pin 2 to Pin 6: OK (No Fault)
3. Pin 7 to Pin 5: Forced Fault (typically
used with external group delay
equalizers)
8
9
3–4
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2.1.7
Revision 1
MN-DT4500A
J1 | COM1 EIA-485/232 Interface Connector (DB-9F)
The J1 | COM1 EIA-485/EIA-232 Interface connector is a 9-pin Type "D"
female (DB-9F) connector. The mating connector is a DB-9M connector.
The pinout specification for EIA-485 2-Wire is provided in Table 3-4; EIA485 4-wire is provided in Table 3-5; the specification for EIA-232 is
provided in Table 3-6.
Table 3-4. J1 – 2-Wire EIA-485 Pinout
Pin #
1
Table 3-5. J1 – 4-Wire EIA-485 Pinout
Description
Pin #
GND; Ground
1
2
2
3
3
Description
GND; Ground
4
+RX/TX; Signal
4
+TX; Signal
5
-RX/TX; Signal Complement
5
-TX; Signal Complement
6
6
7
7
8
+RX/TX; Signal
8
+RX; Signal
9
-RX/TX; Signal Complement
9
-RX; Signal Complement
Note: Pins 8 and 9 are the loop to the next
downconverter
Table 3-6. J1 – EIA-232C Pinout
Pin #
Description
1
2
TD; Transmit Data
3
RD; Receive Data
4
5
GND; Ground
6
7
8
9
3.2.1.8
Chassis Ground Connector
A #10-32 stud is used for connecting a common chassis ground among
equipment.
Note: The AC power connector provides the safety ground.
3–5
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2.2
Revision 1
MN-DT4500A
Module-mounted Connectors
The information that follows pertains to the connectors provided on the available switch
modules (e.g., I/O Module (IOM), Receive Switch Module (RSM), and Transmit Switch Module
(TSM)). Quick reference tables are provided for all available modules in Section 3.2.2.2.
Figure 3-2. IOM, RSM, and TSM Switch Modules
3–6
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2.2.1
Revision 1
MN-DT4500A
J3 | HSB (High Speed Bus) Connector (DB-25F)
The J3 | HSB connector is a Type “D” 25-pin female (DB-25F)
connector that is provided on all switch modules. The mating
connector is a DB-25M connector. The pinout specifications are
provided in Table 3-7.
Note: This connection does not employ a “straight-through” cable assembly. Contact Comtech
EF Data for detailed wiring drawings when cabling between downconverters.
Table 3-7. J3 HSB Interface Connector Pinout
Pin #
1
Description
Cntl_12
2
Cntl_10
3
Cntl_8
4
Cntl_6
5
Cntl_4
6
Cntl_2
7
Cntl_In
8
+14V Out
9
+14V In
10
Aux_3
11
Aux_1
12
-Rx/Tx
13
GND
14
Cntl_11
15
Cntl_9
16
Cntl_7
17
Cntl_5
18
Cntl_3
19
Cntl_1
20
+14V Out
21
+14V In
22
GND
23
Aux_2
24
GND
25
+Rx/Tx
3–7
DT-4500-A Series Downconverters
Rear Panel Connectors
3.2.2.2
Revision 1
MN-DT4500A
Switch Module IF, RF, and Loop Connectors
The IF and RF input and output connectors, and the Loop input and output connector types
vary depend on the band and impedence of the purchase unit. Modules are available for both
non-redundant (also referred to as single thread or standalone) and redundanct
configurations (see Appendix B. REDUNDANT SYSTEM OPERATION for the specific use of
these various switch modules).
The tables that follow provide a quick reference to the available switch modules and their
switching type, operating band, connector type, etc. for the DT-4500-A Series Downconverters
and UT-4500-A Series Upconverters. Contact Comtech EF Data for details and specifications
for the specific system module(s).
Table 3-8. DT-4500-A and UT-4500-A Available Switch Module Assemblies
CEFD P/N
AS/0101-1
AS/0101-2
AS/0101-9
AS/0101-15
AS/0101-19
AS/0101-21
AS/0101-23
AS/0101-29
AS/0101-39
AS/0101-40
IOM Assemblies
Impedance
75
75
50
50
75
50
75
50
50
75
Comments
I/O, Type ‘SMA’
Non-switching, C-Band
Non-switching, C-Band
I/O, Type ‘SMA’
UT-4518-A w/isolator, Type ‘SMA’
UT-4518-A w/isolator
UT-4514F-A w/isolator, Type ‘SMA’
UT-4514F-A w/isolator, Type ‘SMA’
w/isolator, Type ‘SMA’
w/isolator
CEFD P/N
AS/0101-4
AS/0101-6
AS/0101-7
AS/0101-16
AS/0101-20
AS/0101-26
AS/0101-37
AS/0101-38
RSM Assemblies
Impedance
75
75
50
50
75
50
50
75
Comments
Switching, Ku-Band, down
Switching, C-Band, Type ‘N’
Switching, C-Band, Type ‘N’
I/O, Type ‘SMA’
Receive Switch, C-Band, RSM2
RSM2, Type ‘N’
w/isolator, Type ‘SMA’
w/isolator
CEFD P/N
AS/0101-3
AS/0101-5
AS/0101-8
AS/0101-17
AS/0101-18
AS/0101-22
AS/0101-27
AS/0101-28
AS/0101-42
AS/0101-43
TSM Assemblies
Impedance
75
75
50
50
75
75
50
50
75
50
Comments
Switching, Ku-Band, up
Switching, C-Band, up, Type ‘N’
Switching, C-Band, up
Switching, IF & RF, Type ‘SMA’
Switching IF & RF w/isolator
UT-4514F-A w/isolator, Type ‘SMA’
UT-4514F-A w/isolator, Type ‘SMA’
UT-4518-A w/isolator, Type ‘SMA’
DT-4513-A w/isolator, Type ‘SMA’
UT-4514F-A w/isolator
3–8
DT-4500-A Series Downconverters
Rear Panel Connectors
3.3
Revision 1
MN-DT4500A
CEFD P/N
AS/0101-10
AS/0101-11
AS/0101-24
AS/0101-30
AS/0101-35
AS/0101-36
PSM Assemblies
Impedance
75
75
50
50
50
75
Comments
Switching, Type ‘N’
Switching, Type ‘SMA’
RF Switching, Type ‘N’
Type ‘SMA’
Type ‘SMA’ w/isolator
Type ‘SMA’ w/isolator
CEFD P/N
AS/0101-13
AS/0101-25
AS/0101-31
AS/0101-32
AS/0101-33
AS/0101-34
AS/0101-41
EQM Assemblies
Impedance
75
50
75
50
75
50
50
Comments
EQM for 1:1, C- and Ku-Bands
1:N IF & RF Switch, Type ‘SMA’
UT-4514F-A w/isolator
UT-4514F-A w/isolator
UT-4518F-A w/isolator
UT-4518F-A w/isolator
1:1 Switching
Cable Connections
Connect the signal cables to the connectors on the rear panel as shown in Figure 3-3. The cable signal
functions are listed in Table 3-1; see Section 3.2 for detailed information about each connector.
Figure 3-3. DT-4500-A Cabling Schematic (DT-4503-A with Receive Switch Module
[RSM-XX] Shown)
3–9
DT-4500-A Series Downconverters
Rear Panel Connectors
3.3.1
Revision 1
MN-DT4500A
Cable Connections – Standalone (Non-Redundant) Operation
In standalone (non-redundant) downconverter configurations, the downconverter has an
Input/Output Module (IOM-XX) for the RF Input and the IF Output. A downconverter with a
Transmit Switch Module (TSM-XX) or Receive Switch Module (RSM-XX) may be operated in a
non-redundant configuration if an IOM is unavailable.
Figure 3-4 shows a non-redundant configuration using with an IOM installed; Figure 3-5 shows
cabling accomplished with an RSM installed.
Figure 3-4. Standalone (Non-Redundant) Downconverter Configuration with
Input/Putput Module (IOM-XX)
Figure 3-5. Standalone (Non-Redundant) Downconverter Configuration with Receive Switch
Module (RSM-XX)
3–10
DT-4500-A Series Downconverters
Rear Panel Connectors
3.3.2
Revision 1
MN-DT4500A
Cable Connections – Redundant System Operation
In subsystems where a redundant downconverter configuration is used, the backup
downconverter has an Input/Output Module (IOM-XX) and the online downconverters have
Receive Switch Modules (RSM-XX), which switch to the backup downconverter when a fault is
detected. See Appendix B. REDUNDANT SYSTEM OPERATION for a discussion of the
downconverter’s use in redundant applications.
3–11
DT-4500-A Series Downconverters
Rear Panel Connectors
Revision 1
MN-DT4500A
Notes:
3–12
Chapter 4. UPDATING FIRMWARE
4.1
Introduction
TO ENSURE OPTIMAL PERFORMANCE, IT IS IMPORTANT TO OPERATE THE DT-4500-A
WITH ITS LATEST AVAILABLE FIRMWARE.
The DT-4500-A Series Downconverter is factory-shipped with its latest version of operating
firmware. If a firmware update is needed, it can be acquired over satellite; by download from
the Comtech EF Data Web site (www.comtechefdata.com); or from Comtech EF Data Customer
Support during normal business hours via e-mail or on CD by standard mail delivery.
The DT-4500-A Firmware Update process is as follows:
•
Perform the update without opening the DT-4500-A by connecting the rear panel
10/100 Ethernet port to the Ethernet port of a user-supplied PC.
•
Download the firmware update via the Internet to the user PC.
•
Transfer the firmware update, via File Transfer Protocol (FTP), from the user PC to the
DT-4500-A.
4–1
DT-4500-A Series Downconverters
Updating Firmware
4.2
Revision 1
MN-DT4500A
Getting Started: Preparing for the Firmware Download
Step
1
Task
Identify the firmware number and version for download.
Using the unit front panel, the current unit M&C version can be viewed at the top-level
menu of the front panel display (press the [CLR] key several times to view). The firmware
information can also be found within the UTILITY  FIRMWARE INFO  IMAGE#1 or
IMAGE#2 menu branches. For more information, see Chapter 5. FRONT PANEL
OPERATION.
Using the 45xxA Web Server Interface, the firmware information can be found on the
CONFIG | UTILITY page. For more information, see Chapter 6. ETHERNET-BASED REMOTE
PRODUCT MANAGEMENT.
Using serial remote control, the firmware revision levels may be obtained with the
<1/FRM? query. For more information, see Appendix A. REMOTE CONTROL.
2
Create a temporary folder (directory) on an external PC:
•
For Windows Explorer: Select File > New > Folder to create a new folder, then rename
it from “New Folder” to "temp" or another convenient, unused name. Assuming
"temp" works, a "c:\temp" folder should now be created.
Note: The drive letter c: is used in this example. Any valid writable drive letter can
be used.
•
For Windows Command-line: Click [Start] on the Windows taskbar, then click the
“Run...” icon (or, depending on Windows OS versions prior to Windows 95, click the
“MS-DOS Prompt” icon from the Main Menu). Then, to open a Command-line
window…
o
For Windows 95 or Windows 98 – Type “command”.
o
For any Windows OS versions later than Windows 98 – Type “cmd” or
“command”.
o
Alternately, from [Start], select All Programs > Accessories > Command Prompt.
At the Command-line prompt (c:\>), type “mkdir temp” or “md temp” (without quotes –
mkdir and md stand for make directory). This is the same as creating a new folder from
Windows Explorer. There should now be a "c:\temp" subdirectory created (where c: is the
drive letter used in this example).
There should now be a "temp" folder created and available for placement of the firmware file
download.
4–2
DT-4500-A Series Downconverters
Updating Firmware
4.3
Revision 1
MN-DT4500A
Downloading and Extracting the Firmware Update
Step
1
Task
Download the correct firmware file to this temporary folder:
a) Go online to: www.comtechefdata.com;
b) Click on: Support tab;
c) Click on: Software Downloads drop-down or hyperlink from Support page;
d) Click on: Download Flash and Software Update Files icon;
e) Click on: (Select a Product Line) Converters hyperlink;
f)
Click on: The DT-4500-A Series product hyperlink;
g) Select the appropriate DT-4500-A Series Product firmware hyperlink.
About Firmware Numbers, File Versions, and Formats: The flashable files on the download
server are organized by product prefix; firmware number (verify that the correct firmware
number is known – see Step 1) and, where applicable, revision letter and release version.
The DT-4500-A firmware archive file hyperlink is F0000202x_V### (where ‘x’ denotes the
revision letter, and V### denotes the firmware version number). The downloadable files
are stored in two formats: *.exe (self-extracting) and *.zip (compressed). Some firewalls
will not allow the downloading of *.exe files. In this case, download the *.zip file instead.
For additional help with "zipped" file types, refer to PKZIP for Windows, WinZip, or
ZipCentral help files. PKZIP for DOS is not supported due to file naming conventions.
2
Extract a minimum of two files to the temporary folder on the PC:
a) FW-0000202x.bin – the bulk firmware file;
b) ReleaseNotes_DT4500A_V###.pdf, or a similarly-titled file, where ‘V###’ denotes
the firmware version number.
5
Confirm that the files have been extracted to the specified temporary folder on the PC. In
Command-line, use “cd c:\temp” to change to the temporary directory created in Sect. 4.2,
Step 2, then use the “dir” command to list the files extracted from the downloaded archive
file.
The firmware files have been successfully downloaded and are now available for transfer to the DT4500-A.
4–3
DT-4500-A Series Downconverters
Updating Firmware
4.4
Revision 1
MN-DT4500A
Performing the Ethernet FTP Upload Procedure
Step
Task
1
Connect the client PC to the DT-4500-A’s 10/100 Ethernet M&C via a hub or a switch, or
directly to the PC with a crossover cable.
2
Send a “ping” command to the unit to verify the connection and communication:
First, determine the IP address of the unit remotely or by using the DT-4500-A Front Panel:
•
Via Remote Control – Use the <1/IPA? command
•
Via Front Panel – Use the CONFIG  REMOTE  ETHERNET  ADDRESS  IP
Address/Range menu.
Then, using Command-line to PING: At the Command-line prompt, type “ping
xxx.xxx.xxx.xxx” (where ‘xxx.xxx.xxx.xxx’ is the Management IP address of the unit).
The results should confirm whether or not the unit is connected and communicating.
3
Initiate an FTP session with the unit (this example uses Command-line):
a) From the PC, type "ftp xxx.xxx.xxx.xxx" where ‘xxx.xxx.xxx.xxx’ is the IP address of
the DT-4500-A.
b) Enter the Admin User Name (there will be no prompt for a password) to complete
login.
c) Verify the FTP transfer is binary by typing "bin".
d) Type "prompt", then type "hash" to facilitate the file transfers.
4
Transfer the files from the temporary folder on the PC:
Type "put FW-0000202x.bin bulk:” to begin the file transfers. The destination “bulk:” must
be all lower-case. Approximately one minute is required to transfer the file.
5
Verify the file transfer:
a) The PC should report that the file transfer has occurred, and the display on the unit
will start reporting “Programming App Flash … Please wait”.
After a few minutes, the unit will display “Programming main FPGA … Please wait”.
b) Terminate the FTP session by typing "bye" and close the Command-line window.
c) Confirm that the new file was loaded by using the procedure in Step 1.
4–4
DT-4500-A Series Downconverters
Updating Firmware
Step
6
Revision 1
MN-DT4500A
Task
Change the desired image to boot.
From the DT-4500-A front panel menu: UTILITY  FIRMWARE SELECT.
Use the ◄ ► arrow keys to change to the other image, then cycle power to reboot the
unit.
7
Verify the new firmware version has booted by observing the firmware version displayed
on the DT-4500-A front panel, for example:
DT_4503C-2
SW VER #.#.# SN#########
Note: To load the second image, repeat Steps 3 through 6
The DT-4500-A is now operating with its latest firmware. The firmware update process is now
complete.
4–5
DT-4500-A Series Downconverters
Updating Firmware
Revision 1
MN-DT4500A
Notes:
4–6
Chapter 5. FRONT PANEL
OPERATION
0B
5.1
Introduction
Figure 5-1. DT-4500-A Front and Rear Panel Views
Figure 5-1 identifies the key operational features of the front and rear panels of the DT-4500-A
Series Downconverter. This example depicts a DT-4503-A Downconverter equipped with an
Input/Output Module (IOM).
The front panel features (from left): Two Test Point Sample Ports, Six Light-Emitting Diode (LED)
Indicators, a Vacuum Fluorescent Display (VFD); and a six-button keypad.
The Prime Power Switch, located on the rear panel, is an integral component of the IEC Line
Input (AC Power) Connector.
The function and behavior of the LED indicators, keypad, and VFD are described in detail in this
chapter. The keypad comprises six individual keyswitches. You can fully control and monitor the
operation of the DT-4500-A from the front panel using the keypad and display. Enter data via
the keypad, and review messages on the VFD. Nested menus display all available options and
5–1
DT-4500-A Series Downconverters
Front Panel Operation
Revision 1
MN-DT4500A
prompt you to carry out a required action. The LEDs indicate, in a summary fashion, the status
of the unit.
5.1.1
Switch Power On (Rear Panel)
DT-4500-A AC Power Switch
(Standard)
DT-4500-A DC Power Switch
(Optional)
Prior to turning on power to the unit, check to ensure that installation is complete, and verify
that the DT-4500-A is connected to the proper prime power source, RF Input, and IF Output.
For more information, see Chapter 2. INSTALLATION and Chapter 3. REAR PANEL
CONNECTORS.
Switch on the unit and verify the cooling fan is operational, the LED indicators illuminate as
expected, and the Vacuum Fluorescent Display is readable.
5.1.2
LED Indicators
The following table defines the operational condition,
when lit, of the six front panel LED indicators:
LED
Color
Operational Condition (When Lit)
POWER ON
Green
Prime power is applied when the light is on.
OUTPUT ENABLE
Yellow
Transmit function operating when the light is on.
REMOTE
Yellow
In Remote Control Mode when the light is on.
ON LINE
Yellow
Operating on-line to transmit data when the light is on.
FAULT
Red
Fault condition exists when the light is on.
STORED FAULT
Red
Faults stored and logged when the light is on.
5–2
DT-4500-A Series Downconverters
Front Panel Operation
5.1.3
Revision 1
MN-DT4500A
Keypad
The keypad comprises six individual keyswitches. They have a
positive ‘click’ action, which provides tactile feedback. The
function of the front panel keypad is as follows:
Use the ENTER key to select a displayed function or to execute a modem configuration change
Use the CLEAR key to back out of a selection or to cancel a configuration change that has not been
executed since ENTER was last pressed. Pressing CLEAR generally returns the display to the
previous selection.
(Up, Down)
(Left, Right)
Use the ▲ ▼ arrow keys to move to the next selection or to move the cursor position. Most of
the menus (space permitting) include arrow key hints to guide operation.
Use the ◄ ► arrow keys primarily to change configuration data (numbers) at the current cursor
position. They may be used occasionally to scroll through a number of choices at the current cursor
position. Most of the menus (space permitting) include arrow key hints to guide operation.
The keypad has an auto-repeat feature. Holding a key down for more than 1
second repeats the key action automatically at the rate of 15 keystrokes per
second. This is particularly useful when editing numeric fields with many digits,
such as frequency or data rate.
5.1.4
Vacuum Fluorescent Display (VFD)
The DT-4500-A features a Vacuum Fluorescent
Display (VFD). The VFD is an active display showing
two lines of 24 characters each. It produces a blue
light, the brightness of which can be user-adjusted. Compared to a Liquid Crystal Display (LCD),
it has greatly superior viewing characteristics and does not suffer problems of viewing angle or
contrast.
On most menu screens, you will observe a flashing solid block cursor, which blinks at a onceper-second rate. This indicates the currently selected item, digit, or field. Where this solid block
cursor would obscure the item being edited (e.g., a numeric field) the cursor will automatically
change to an underline cursor.
If you were to leave the same screen displayed for weeks at a time, the VFD could become
‘burnt’ with this image. To prevent this, the unit has a ‘screen saver’ feature that activates after
1 hour. The top line of the display will display the circuit ID, and the bottom line will display
‘Press any key...’ The message moves from right to left across the screen, then wraps
around. Pressing any key will restore the previous screen.
5–3
DT-4500-A Series Downconverters
Front Panel Operation
5.2
Revision 1
MN-DT4500A
Opening Screen
2B
DT_45XX –X
SW VER X.X.X SN#########
This screen is displayed whenever power is first applied to the unit. When the prime power is
turned on, this VFD ‘splash’ display indicates the downconverter model number – e.g.,
‘DT_4503 -1’ – along with the version number of the firmware installed, and the serial number
assigned for the unit in use.
The opening screen may be accessed from any location within the DT-4500-A menu structure by
pressing the CLEAR key repeatedly. Otherwise, press any key to access the main menu.
5.3
Main Menu
CONFIG MONITOR FAULTS
PRE-SELECTS UTILITY
The downconverter command menus are provided in a structured tree format designed for
logical access and execution of all control functions, and to prevent the execution of an invalid
entry by the operator.
The following table identifies each menu branch available from the main menu, its content
section in this chapter, and the functional description of each branch:
Menu Branch
Sect
Description
CONFIG
5.3.1
(Configuration) Allows full configuration of the DT-4500-A.
MONITOR
5.3.2
Allows the real-time monitoring of system voltages, unit temperature, IFLO tuning,
and Synth tuning,
FAULTS
5.3.3
The downconverter displays a total of one hundred (100) faults, which are date
and time stamped and stored in memory as they occur. The stored faults remain in
memory until a clear command is entered. When the number of faults reaches
100, the 100th fault will display ER.
PRE-SELECTS
5.3.4
Allows configuration and recall of up to 32 pre-set operating selections.
UTILITY
5.3.5
Allows configuration of such system functions as the Real-Time Clock, VFD
brightness, unit ID, and firmware loading preferences.
Use the ◄ ► arrow keys to select CONFIG, MONITOR, FAULTS, PRE-SELECTS, or UTILITY, and
then press ENTER.
5–4
DT-4500-A Series Downconverters
Front Panel Operation
5.3.1
Revision 1
MN-DT4500A
CONFIG (Configuration)
OUTPUT REMOTE REDUNDANCY
FAULTRECOVERY COLDSTART
Use the ◄ ► arrow keys to select from the submenu choices shown, and then press ENTER. Note
the following:
5.3.1.1
Submenu
Sect
Functional Description
OUTPUT
5.3.1.1
Allows user to define output frequency, attenuation, and set Rx operations as
on or off.
REMOTE
5.3.1.2
(Remote C ontrol) Allows definition of whether the unit is being controlled
locally or remotely, and identifies the unit address, interface type, and rate and
format of the baud parameters.
REDUNDANCY
5.2.1.3
(Redundancy) Permits you to identify the redundancy state and mode (see
Appendix B . D T-4500-A R EDUNDANCY O PERATION for further
information).
FAULTRECOVERY
5.3.1.4
Allows configuration of Fault Recovery in Auto or Manual mode.
COLDSTART
5.3.1.5
Allows user to mute the downconverter output signal for a pre-determined time
after power is applied to the downconverter to ensure that the reference
oscillator is stable.
CONFIG: OUTPUT
Frq=03627.125 MHz
Atten=19.75 dB Rx = Off
Typical for each parameter, use the ◄ ► arrow keys to first navigate to a parameter to edit, and
then use the ▲ ▼ arrow keys to edit the value of that digit or setting.
Freq (Frequency): Displays the current downconverter frequency in MHz, and allows the
selection of a new frequency channel between RFLow to RFHigh MHz (e.g.; 10950.000 to
12750.000 MHz for Model DT-4513-A) in 125 KHz steps.
Atten (Attenuation): Displays the downconverter attenuation setting, and allows the selection
of a new setting from 0.00 to 25.00 dB in 0.25 dB steps. The default setting is 10.00 dB.
Rx: Use the ▲ ▼ arrow keys to set downconverter operation as On or Off. The default mode is
Off.
Press ENTER when done.
5–5
DT-4500-A Series Downconverters
Front Panel Operation
5.3.1.2
Revision 1
MN-DT4500A
CONFIG: REMOTE (Remote Control)
Remote Control: Local
SERIAL ETHERNET
Use the ◄ ► arrow keys to select Local, SERIAL, or ETHERNET, and then press ENTER.
CONFIG: Remote Control  Local
When Remote Control: Local is selected, then remote control will be disabled. Remote
monitoring is still possible.
CONFIG: Remote Control  SERIAL
Serial Mode = RS-232
Addr=001 Baud=9600 8-N-1
On the top line: To set the Serial Mode, use the ▲ ▼ arrow keys to select RS-232 or
RS-485, and then press ENTER.
On the bottom line: To edit the Serial address, first use the ◄ ► arrow keys to navigate to
the digit to edit, and then use the ▲ ▼ arrow keys to edit the value of that digit. The valid
range of addresses is from 001 (default) to 255.
To edit the Baud Rate, first use the ◄ ► arrow keys to navigate to the parameter, and then
use the ▲ ▼ arrow keys to select a different baud rate. Available choices are 1200, 2400,
4800, 9600 (default), 19K2, and 38K4.
To edit the asynchronous character format, first use the ◄ ► arrow keys to navigate to the
parameter, and then use the ▲ ▼ arrow keys to select a different format. Available choices
(i.e., number of data bits; odd, even, or no parity; number of stop bits) are 8-N-1, 7-E-2, or
7-O-2.
Press ENTER when done.
CONFIG: Remote Control  ETHERNET
ADDRESS GATEWAY SNMP
MAC = 00-06-B0-00-00-0F
On the bottom line: The unit MAC address is displayed here. This read-only menu shows
the. Once the MAC address has been noted, exit this menu by pressing ENTER or CLEAR.
On the top line: Use the ◄ ► arrow keys to select the parameter to configure – ADDRESS,
GATEWAY, or SNMP – and then press ENTER to continue.
5–6
DT-4500-A Series Downconverters
Front Panel Operation
Revision 1
MN-DT4500A
CONFIG: Remote Control  ETHERNET  ADDRESS
IP Address/Range:
192.168.001.002/24
To edit the IP Address and Range for the Ethernet M&C port for this unit: First, use the ◄ ►
arrow keys to select the digit to edit, and then use the ▲ ▼ arrow keys to edit the value of that
digit. Press ENTER when done.
CONFIG: Remote Control  ETHERNET  GATEWAY
Ethernet IP Gateway:
192.168.001.002
To edit the IP Gateway Address for the Ethernet M&C port for this unit: First, use the ◄ ►
arrow keys to select the digit to edit, and then use the ▲ ▼ arrow keys to edit the value of that
digit. Press ENTER when done.
CONFIG: Remote Control  ETHERNET  SNMP
COMMUNITIES
TRAPS
Use the ◄ ► arrow keys to select the parameter to configure: COMMUNITIES or TRAPS.
CONFIG: Remote Control  ETHERNET  SNMP  COMMUNITIES
SNMP Communities:
READ WRITE TRAP
Use the ◄ ►arrow keys to select READ, WRITE, or TRAP, and then press ENTER.
CONFIG: Remote Control  ETHERNET  SNMP 
COMMUNITIES READ
Read Community:
public
You may view or edit the SNMP Read Community string. To edit, first use the ◄
► arrow keys to select the character to edit, and then use the ▲ ▼ arrow keys
to edit that character. Press ENTER when done.
CONFIG: Remote Control  ETHERNET  SNMP 
COMMUNITIES WRITE
Write Community:
private
5–7
DT-4500-A Series Downconverters
Front Panel Operation
Revision 1
MN-DT4500A
You may view or edit the SNMP Write Community string. To edit, first use the ◄
► arrow keys to select the character to edit, and then use the ▲ ▼ arrow keys
to edit that character. Press ENTER when done.
CONFIG: Remote Control  ETHERNET  SNMP 
COMMUNITIES TRAP
Trap Community:
comtech
You may view or edit the SNMP Trap Community string. To edit, first use the ◄
► arrow keys to select the character to edit, and then use the ▲ ▼ arrow keys
to edit that character. Press ENTER when done.
CONFIG: Remote Control  ETHERNET  SNMP  TRAPS
TRAPIP1 TRAPIP2 VERSION
IP1 IP2 Version
Use the ◄ ► arrow keys to select TRAPIP1, TRAPIP2, or VERSION, and then press
ENTER.
CONFIG: Remote Control  ETHERNET  SNMP  TRAPS 
TRAPIP1/TRAPIP2
TRAP IP ADDRESS #1:
000.000.000.000
TRAP IP ADDRESS #2:
000.000.000.000
You may view or edit the Trap Destination’s IP Addresses. To edit, first use the ◄
► arrow keys to select the digit to edit, and then use the ▲ ▼ arrow keys to edit
the value of that digit. Press ENTER when done.
Note: If both Trap IP Addresses are 000.000.000.000, it means Traps are disabled.
CONFIG: Remote Control  ETHERNET  SNMP  TRAPS 
VERSION
Trap Version:
SNMPv1 SNMPv2
Use the ▲ ▼ arrow keys to select the trap version – SNMPv1 or SNMPv2 – and
then press ENTER.
5–8
DT-4500-A Series Downconverters
Front Panel Operation
5.3.1.3
Revision 1
MN-DT4500A
CONFIG: REDUNDANCY
1:1 Redundancy is an optional feature for the DT-4500-A. If You attempt to select any feature from
this menu branch, and either Redundancy Configuration is off or the downconverter is the primary
operating unit, the Redundancy menu branch appears as follows:
Redundancy: MODE
Otherwise:
Redundancy: MODE
Auto/Manual FORCE HSB
Use the ◄ ► arrow keys to select MODE, Auto/Manual, FORCE, or HSB (High Speed Bus), and
then press ENTER.
Note: If any submenu is selected from this menu branch when the unit is not in Local Mode
(i.e., the unit is in either Serial or Ethernet Remote Mode), the system prompts You to switch or
Local Mode as follows:
Remote Mode: press ENTER
for local mode, or CLEAR
Operations may continue once Local Mode is established.
CONFIG: REDUNDANCY  MODE
Redundancy Config = On
CONVERTER = #BU
1:01
On the top line: First, use the ◄ ► arrow keys to navigate to the Redundancy Config
setting, and then use the ▲ ▼ arrow keys to set operation as On or Off.
On the bottom line: First, use the ◄ ► arrow keys to navigate to the Converter Selection
setting, and then use the ▲ ▼ arrow keys to toggle the downconverter operational
preference as #BU or #01. Note the following:
•
With CONVERTER = #BU, the unit is set as the standby, or backup unit. This mode of
operation is indicated on the right-hand side of the bottom line as 1:01.
•
With CONVERTER = #01, the unit is set as the primary operating unit. The mode of
operation is indicated on the right-hand side of the bottom line as POL=1.
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CONFIG: REDUNDANCY Auto/Manual
CONVERTER 123456789ABC
AUTO/MAN A----------Use this submenu to define backup as Automatic or Manual. This command provides for
automatic switching by the backup downconverter if both units are in the Redundancy
Mode. This command is only accepted by the backup downconverter. If a chain
downconverter is set in Manual Mode, the backup downconverter will log the occurrence
and not act upon further information from the downconverter until put into Automatic
Mode.
On the top line: The unit in use and its Application ID (identification label) are displayed
here.
On the bottom line: First, use the ◄ ► arrow keys to navigate to the AUTO/MAN setting,
and then use the ▲ ▼ arrow keys to set toggle switch over as A (Automatic) or M
(Manual).
CONFIG: REDUNDANCY FORCE
CONV 01 OFFSET=+00.00 DB
ACTIVATE BACKUP = NO
On the top line: First, use the ◄ ► arrow keys to navigate to the OFFSET operational
threshold setting (i.e., the limit defined to automatically trigger switchover to the backup
unit), and then use the ▲ ▼ arrow keys to set that value in 0.25 dB increments.
On the bottom line: First, use the ◄ ► arrow keys to navigate to the ACTIVATE BACKUP
setting, and then use the ▲ ▼ arrow keys to set toggle switch over as NO (i.e., no backup
will occur at the defined operational threshold), or FORCE (i.e., switchover will take place
automatically if operation exceeds the predefined operational threshold.
Note that this submenu is operational only with a backup unit assigned, and with the
switchover set as Automatic. In the absence of a designated backup unit and/or switchover
set as Manual, the following message displays:
NO UNITS CURRENTLY
BACKED UP OR IN MANUAL
Press ENTER or CLEAR to return to the previous menus, and then reconfigure the system to
operate as intended.
CONFIG: REDUNDANCY HSB
CONV# 01 FRQ= 3625.000
ATTN=00.00 AUTO
OK
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In the "Daisy Chain" configuration, the backup downconverter communicates with the
online units through the high-speed interface bus (HSB). The backup downconverter is able
to detect faults and reconfigure itself to replace the faulted downconverter. The HSB
interface is also used in the backup downconverter to monitor configuration changes made
to an online downconverter. Changes in frequency, gain, or polarity are immediately
entered into the backup table as well as information from new online units. The high-speed
bus does not interfere with the remote serial communication link access to any of the
converters in the chain.
The HSB (High Speed Bus) submenu is used to configure operation of the J3 HSB connector
provided on the optional Receive Switch Module (RSM) and Transmit Switch Module (TSM).
When an RSM or TSM is not configured for operation, the following message displays:
CONV #01 – NO DATA
HSB NO RESPONSE
Press ENTER or CLEAR to continue.
See Appendix B. REDUNDANT SYSTEM OPERATION for detailed information about using the
front panel menus for redundancy configuration and operation.
5.3.1.4
CONFIG: FAULTRECOVERY
Fault Recovery: Auto
Use the ▲ ▼ arrow keys to select Fault Recovery as Manual or Automatic, and then press
ENTER. The default operation is Auto.
5.3.1.5
CONFIG: COLDSTART
Cold Start = Disabled.
When redundancy is not active, use the ▲ ▼ arrow keys to select Cold Start as Enabled or
Disabled, and then press ENTER. The default operation is Disabled.
Cold Start Mode, if enabled, mutes the downconverter output signal for a pre-determined time
after power is applied to the downconverter – 15 minutes – to ensure that the reference
oscillator is stable.
Note the following:
•
You must be in Local or Remote Mode to use this command (default is Remote).
•
This function is disabled in redundant systems.
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MONITOR
Three read-only information screens provide monitoring of a number of operating voltage,
temperature and tuning parameters. Use the ▲ ▼ arrow keys to page between screens.
The following examples are provided for informational purposes only – the data displayed here
for each parameter will vary depending on the operating conditions for the system in use:
15VDC=15.6V 14VDC=14.0V ▲
VCC=0.5V 5VDis=0.50V
▼
Converter Temp = +30.0C ▲
IFLO Tuning = 0.38V ▼
Synth Tuning: Sum=0.32V ▲
Coarse=06.0V Fine=03.5V ▼
Press ENTER or CLEAR to continue.
5.3.3
FAULTS
CURRENT
STORED
Use the ◄ ► arrow keys to select CURRENT or STORED, and then press ENTER.
5.3.3.1
FAULTS: CURRENT
Four read-only information screens are provided to monitor a number of operating parameters
and return back whether the parameters are OK – i.e., operating within normal ranges, or FT –
i.e., currently faulted. Use the ▲ ▼ arrow keys to page between screens.
The following examples are provided for information purposes only – the data displayed here
will vary depending on the operating conditions for the system in use:
Power Faults: 15VDC=OK ▲
14VDC=OK VCC=OK ▼
IFLO Lock Detect = OK ▲
▼
Synth Faults: SumLD=OK ▲
FineLD=OK CoarseLD=OK ▼
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Conv Temperature = OK ▲
High Speed Bus = OK ▼
Press ENTER or CLEAR to continue.
5.3.3.2
FAULTS: STORED (Stored Faults Log)
VIEW
CLEAR-ALL
Use the ◄ ► arrow keys to select View or Clear-All, and then press ENTER.
FAULTS: STORED VIEW
If View is selected and no faults exist, the system displays the following message:
No Stored Faults.
The faults log can store up to 100 faults. When a fault condition occurs, it is date- and timestamped, and stored in the faults log with a number assigned in the order received. The fault
information displays as per the following example:
Log05 01/23/11 09:27:15▲
Fault – HSB
▼
When the fault condition clears, this is also recorded in the same fashion as the fault was
originally recorded, as shown per the following example:
Log09 01/23/11 10:45:35▲
Clear – HSB
▼
The stored faults remain in memory until the CLEAR-ALL command is entered. When the
number of faults reaches 100, the 100th fault will display ER.
You may use the ▲ ▼ arrow key to scroll backwards or forwards through the faults log.
Press ENTER or CLEAR to return to the previous menu.
FAULTS: STORED CLEAR-ALL
Clear All Stored Faults
No Yes
Use the ◄ ► arrow keys to choose No or Yes as prompted, and then press ENTER.
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If Yes is selected, the faults log is cleared and you are returned to the previous menu. However,
if there are faults present on the unit at this time, they will be re-stamped and new log entries
will be generated.
5.3.4
PRE-SELECTS
#03 LOAD PROGRAM CLEAR ▲
03625.125 MHz 01.25 dB ▼
You may create (program) up to 32 operating configurations, and recall them as needed. If any
pre-selects exist, use the ▲ ▼ arrow keys browse through the available pre-selects (i.e., #01
through #32), and then press ENTER.
Note: Upon initial selection – i.e., prior to the creation of any pre-selects – this menu branch
appears as follows:
#XX LOAD PROGRAM CLEAR
No Pre-Select Programmed
Use the ◄ ► arrow keys to select one of the following actions, and then press ENTER.
5.3.4.1
Selection
Functional Description
LOAD
Recalls a previously defined pre-select from memory.
PROGRAM
Stores a defined set of operating parameters into memory for future recall.
CLEAR
Clears a previously defined pre-select from memory.
PRE-SELECTS: LOAD
Load this pre-select
Into converter? No Yes
LOAD is operable when pre-selects have previously been programmed into the unit using the
PROGRAM submenu. Use the ◄ ► arrow keys to select No or Yes, and then press ENTER.
5.3.4.2
PRE-SELECTS: PROGRAM
Program pre-select? #XX
04200.000 MHz 01.25 dB
Select PROGRAM when it is desired to save an operational configuration for recall at a later
date.
On the top line, first use the ▲ ▼ arrow keys to navigate to the pre-select designator (#XX),
and then use the ▲ ▼arrow keysto select a number from 01 to 32.
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The read-only bottom line displays the operating parameters that will be stored into the
designated slot (using this submenu), and then recalled via the LOAD submenu.
5.3.4.3
PRE-SELECTS: CLEAR
Clear this pre-select?
No Yes
Use the ◄ ► arrow keys to select No or Yes to clear a previously saved parameter from
memory. This will free up the slot for future pre-select programming needs. Press ENTER when
done.
5.3.5
UTILITY
TIME DISP FIRMWARE AID
REFOSC SLOPE LAMP-TEST
Use the ◄ ► arrow keys to select from the submenu choices shown, and then press ENTER. Note
the following:
Submenu
5.3.5.1
Sect
Functional Description
TIME
5.3.5.1
Allows configuration of the Real-Time Clock.
DISP
5.3.5.2
(Display) Allows adjustment of the Video Fluorescent Display (VFD) brightness
level.
AID
5.2.5.3
Allows definition of a unit identifier (label).
REFOSC
5.3.5.4
(External Reference Oscillator) Allows adjustment of the downconverter
reference frequency.
SLOPE
5.3.5.5
Allows adjustment of the downconverter slope settings.
LAMP-TEST
5.3.5.6
Performs a diagnostic test of the front panel LEDs and VFD.
UTILITY: TIME (Real-Time Clock)
Edit Real-Time Clock:
12:00:00 01/23/11
To edit the time and date settings of the real-time clock, first use the ◄ ► arrow keys to select
the digit to be edited, and then use the ▲ ▼ arrow keys to change the value of that digit. Press
ENTER when done.
Note: 24-hour Military time format is used.
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UTILITY : DISP (VFD Display)
VFD Display Brightness:
100%
To edit the display brightness: Use the ▲ ▼ arrow keys to select a brightness value of 25%,
50%, 75%, or 100%. Press ENTER when the brightness is suitable.
5.3.5.3
UTILITY: AID (Application Identification String)
Edit AID Message?
No Yes
The Application Identification (AID) command allows a free form message to be created. It is
intended to identify the satellite, either transponder, beam, destination or other aspects of the
application that may be significant to operations. The AID display alternates with the Equipment
type display by use of the CLEAR key. The default is "AID MESSAGE".
To edit the AID message: First, use the ◄ ► arrow keys to select No or Yes, and then press
ENTER. Then, to edit the Application ID string: For both the top and bottom lines of the display,
first use the ◄ ► arrow keys to select the character to edit, and then edit that character using
the ▲ ▼ arrow keys.
A maximum of 24 characters are available on each line (48 characters in all), as follows:
[Space] ( ) * + - , . / 0-9 and A-Z.
DT-4500-A SERIES
48 CHAR MAX TST MESSAGE
Once the Application ID string is composed, press ENTER.
5.3.5.4
UTILITY: REFOSC (Reference Oscillator Adjustment)
Reference frequency
adjustment = 087
The reference oscillator adjustment may be manipulated with this submenu. Use the ◄ ► arrow
keys to select the digit to edit, and then use the ▲ ▼ arrow keys to edit the value of that digit.
Press ENTER when done.
The default Reference Frequency tuning adjustment is 087, with allowable values from 0 to 255.
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UTILITY: SLOPE
Converter slope
adjustment = 0.0
The downconverter slope adjustment may be manipulated with this submenu. Use the ◄ ► arrow
keys to select the digit to edit, and then use the ▲ ▼ arrow keys to edit the value of that digit.
Press ENTER when done.
The default downconverter slope adjustment is 0.0, with allowable values from 0.0 to 1.0.
5.3.5.6
UTILITY: LAMP-TEST
Start Lamp Test?
No Yes
To start the lamp test, use the ◄ ► arrow keys to select No or Yes, and then press ENTER. The
test begins with the following message:
Lamp Test in Progress
Please Wait
The front panel will then run through a series of diagnostics: the LED array will cycle, and then the
VFD will generate a series of test patterns. The VFD will return to the previous menu upon
successful completion of the test.
Once the test has run, press CLEAR to return to the main menu. .
5.3.5.7
UTILITY: FIRMWARE
THESE MENUS ARE INTENDED FOR DIAGNOSTIC PURPOSES ONLY. DO NOT
CHANGE AN IMAGE UNLESS OTHERWISE INSTRUCTED BY COMTECH EF
DATA CUSTOMER SUPPORT.
This series of submenus permits you to view information about the DT-4500-A internal
firmware. The downconverter can store two complete firmware images, and you can select
which image will be loaded the next time the unit reboots.
Firmware Images:
INFO SELECT
Use the ◄ ► arrow keys to select INFO or SELECT, and then press ENTER.
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UTILITY: FIRMWARE  INFO
Firmware Info: BOOTROM
IMAGE#1 IMAGE#2
Use the ◄ ► arrow keys to select BOOTROM, IMAGE#1 or IMAGE#2, and then press ENTER to
view the information.
The BOOTROM screen displays information similar to the example that follows:
Bootrom: FW-0000200
X.X.X
MM/DD/YY
For IMAGE#1 and IMAGE#2, each image is further broken down as follows (where IMAGE#X
denotes IMAGE#1 or IMAGE#2):
IMAGE#X: Bulk
APP FPGA
Use the ◄ ► arrow keys to select Bulk, App, or FPGA, and then press ENTER. The screens display
information in a format similar to the examples that follow:
Bulk#X: FW-0000202
X.X.X
MM/DD/YY
App#X:
X.X.X
FW-0000203
MM/DD/YY
FPGA#X: FW-0000204
X.X.X
MM/DD/YY
UTILITY: Firmware  SELECT
Current Active Image: #1
Next Reboot Image: #1 #2
The top line shows the Current Active Image. From the bottom line, select the Next Reboot
Image (i.e., the image that will be active the next time the unit is rebooted) as #1 or #2 using
the ◄ ► arrow keys. Press ENTER when done.
If the image selected is already designated as the Next Reboot Image, the following message
displays:
THAT IMAGE IS ALREADY
CURRENT. NO CHANGE MADE.
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Chapter 6. ETHERNET-BASED
REMOTE PRODUCT
MANAGEMENT
6.1
Introduction
Ethernet-based remote management and control of the DT-4500-A is available using the rear
panel ‘10/100 ETHERNET’ port.
1. TO PROCEED WITH ETHERNET-BASED REMOTE PRODUCT MANAGEMENT,
ASSUMPTIONS ARE MADE THAT:
•
The DT-4500-A is operating with the latest version firmware files.
•
The DT-4500-A is connected to a user-supplied Windows-based PC as
follows:
•
o
The PC’s serial port is connected to the DT-4500-A rear panel ‘J1 |
COM1’ port with a user-supplied serial cable.
o
The PC’s Ethernet port is connected to the DT-4500-A rear panel
‘10/100 ETHERNET’ port with a user-supplied hub, switch, or direct
Ethernet cable connection.
o
The PC is running a terminal emulation program (for operation of the
45xxA Telnet or serial remote control interface) and a compatible web
browser (for operation of the 45xxA Web Server Interface).
The DT-4500-A’s Management IP Address has been noted using the
DT-4500-A Front Panel.
2. USE OF THE ETHERNET-BASED SNMP INTERFACE IS RECOMMENDED
ONLY FOR ADVANCED USERS. ALL OTHER USERS ARE STRONGLY
ENCOURAGED TO USE THE 45XX A WEB SERVER INTERFACE FOR REMOTE
MONITOR AND CONTROL (M&C) OF THE DT-4500-A.
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6.1.1
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Ethernet Management Interface Protocols
For SNMP, Telnet, or HTTP operation, the DT-4500-A must be configured with the
Ethernet control option. From the front panel, select CONFIG: REMOTE 
ETHERNET. See Chapter 5. FRONT PANEL OPERATION for further information.
The user PC provides access to Ethernet-based remote Monitor and Control (M&C) of the
DT-4500-A through three separately operated protocols:
6.2
•
Simple Network Management Protocol (SNMP). This requires a user-supplied Network
Management System (NMS) and a user-supplied Management Information Base (MIB) File
Browser.
•
45xxA Telnet Interface. This requires use of a user-supplied terminal emulation program
such as HyperTerminal.
•
45xxA Web Server (HTTP) Interface. This requires a compatible user-supplied web
browser such as Internet Explorer.
SNMP Interface
The Simple Network Management Protocol (SNMP) is an Internet-standard protocol for
managing devices on IP networks. An SNMP-managed network consists of three key
components:
6.2.1
•
The managed device. This includes the DT-4500-A.
•
The SNMP Agent. This is the software that runs on the DT-4500-A. The 45xxA SNMP
Agent supports both SNMPv1 and SNMPv2c.
•
The user-supplied Network Management System (NMS). This is the software that runs
on the manager.
Management Information Base (MIB) Files
MIB files are used for SNMP remote management of a unique device. A MIB file consists of a
tree of nodes called Object Identifiers (OIDs). Each OID provides remote management of a
particular function. Compile these MIB files in a user-supplied MIB Browser or SNMP Network
Monitoring System server.
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The following MIB files are associated with the DT-4500-A:
MIB File/Name
(where ‘x’ is the
revision letter)
FW-0000235x.mib
ComtechEFData
Root MIB file
6.2.2
Description
ComtechEFData MIB file gives the root tree for ALL Comtech EF Data products and
consists of only the following OID:
Name: comtechEFData
Type: MODULE-IDENTITY
OID: 1.3.6.1.4.1.6247
Full path:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).comtechEFData(6247)
Module: ComtechEFData
FW-0020205x.mib
DT-4500-A MIB file
MIB file consisting of all OID’s for management of the downconverter functions
FW-0020206x.mib
DT-4500-A Traps
MIB file
Trap MIB file for SNMPv1 traps common for DT-4500-A.
SNMP Community Strings
In SNMP v1/v2c, the SNMP Community String is sent unencrypted in the SNMP
packets. Caution must be taken by the network administrator to ensure that SNMP
packets travel only over a secure and private network if security is a concern.
The DT-4500-A uses Community Strings as a password scheme that provides authentication
before gaining access to the DT-4500-A agent’s MIBs. They are used to authenticate users and
determine access privileges to the SNMP agent.
Type the SNMP Community String into the user-supplied MIB Browser or Network Node
Management software. You may define three Community Strings for SNMP access:
•
Read Community
default = public
•
Write Community
default = private
•
Trap Community
default = comtech
For proper SNMP operation, the DT-4500-A MIB files must be used with the
associated version of the DT-4500-A Series Downconverter M&C. Refer to the DT4500-A FW Release Notes for information on the required FW/SW compatibility.
6.2.3
SNMP Traps
The DT-4500-A supports both SNMPv1 traps and SNMPv2 notifications. The DT-4500-A has the
ability to send out SNMP traps when certain faults occur in the unit. A trap is sent both when a
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fault occurs and when a fault clears. Which style of traps the DT-4500-A sends are configured
using the DT-4500-ASNMPTrapVersion OID.
The DT-4500-A supports MIB2 SNMPv1traps and SNMPv2notifications.
6.3
45xxA Telnet Interface
The DT-4500-A provides a Telnet interface for the purpose of Equipment M&C via the standard
equipment Remote Control protocol. The Telnet interface requires user login at the
Administrator level and Read/Write level. An example of the login process is shown here:
Once logged into the Telnet interface as Administrator, you can access the standard remote
control interface defined in Appendix A. REMOTE CONTROL.
6.3.1
Telnet Operation via HyperTerminal
There is a disadvantage when using Windows Command-line as a Telnet client. Since Commandline cannot translate a ‘\r’ (i.e., carriage return or “CR”) to a ‘\r\n’ (i.e., CR+line feed “LF”) for the
messages coming from Telnet Server, any multi-line Target-to-Controller response (e.g., the
response to the FRW? query) will be displayed as one line, with the latter lines overwriting the
previous lines. In order to view the full response messages, Comtech EF Data recommends use
of the HyperTerminal terminal emulation program, configured as a Telnet client.
Configure HyperTerminal as follows:
1. Ensure that the connection is made
using TCP/IP (Winsock) instead of
COM1 or COM2, as shown at the near
right.
2. ASCII Setup (File  Properties 
Settings  ASCII Setup): Check the
"Send line ends with line feeds" option
in the ASCII Sending section, and the
"Append line feeds to incoming line
ends" option in the ASCII Receiving
section, as shown at the far right.
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An example of login and remote command/query execution, when using HyperTerminal as the
interface, is shown here:
6.4
45xxA Web Server (HTTP) Interface
A user-supplied web browser allows the full monitor and control (M&C) of the DT-4500-A
through its 45xxA Web Server Interface. This embedded web application is designed for, and
works best with, Microsoft’s Internet Explorer Version 5.5 or higher (the examples shown use
Internet Explorer Version 9.0).
See Chapter 5. FRONT PANEL OPERATION or the Remote Commands Specifications tables found
in Appendix A. REMOTE CONTROL for detailed descriptions of many of the functions depicted
throughout Sect. 6.4.5 Web Server Page Descriptions.
6.4.1
Enabling the Web Server Interface
The IP Address can be verified from the front panel menus: CONFIG: REMOTE
 ETHERNET  ADDRESS. See Chapter 5. FRONT PANEL OPERATION for
complete details about using this M&C interface.
To enable the Web Server Interface in the DT-4500-A using only a 100BaseTx remote interface
(this assumes you are running Microsoft Windows OS):
1. Select Start, then Run, then type “cmd”
to open the command prompt window:
2. Start a Telnet session with the unit at the default
IP address (this example uses 192.168.1.4):
3. Enter the Telnet username and password (the
default for both parameters is comtech):
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Failure to enter the correct User name and Password will return you to a blank login screen.
6.4.2
User Login
1. From the PC, type the default IP address for the DT-4500-A
into the Address area of the browser (this example uses
http://192.168.1.4):
2. At the prompt, type in a valid User name and Password,
similar to the dialog box shown to the right. For all
interfaces, the default for both is comtech.
Type the User name and Password, and then click [OK].
Failure to enter the correct User name and Password will return you to the Login window.
Should you continue to specify an invalid User name or Password, the message “You do not have
security privilege to access this area.” displays. Otherwise, upon entry of the valid IP address and
login information 45xxA Web Server Interface “splash” page displays, similar to the example
shown here:
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6.4.3
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45xxA Web Server Interface Operational Features
6.4.3.1
Navigation
The 45xxA Web Server Interface features navigation tabs located at
the top of each page. After you click a navigation tab, you may click
an available page hyperlink.
This manual uses a naming format for all Web pages to indicate the depth of navigation needed
to view the subject page: “Top Level Tab | Web page hyperlink”.
For example: “Home | Support” is interpreted to mean “first click the top-level ‘Home’
navigation tab; then, click the ‘Support’ page hyperlink.
6.4.3.2
Page Sections
Each page features one or more sections. The title at the upper-left
corner of each page or page section provides indicates its
operational features. Each section can feature editable fields, action
buttons, and read-only displays that are specific to that section.
This manual explains the purpose and operation for each Web page on a per-page, per-section
basis.
6.4.3.3
Action Buttons
Action buttons are important in the Web Server Interface. Click an action
button to do one of these tasks:
•
Reset changed parameters to remove unsaved changes.
•
Permanently save changes.
•
Refresh the page with current data.
If you edit a field, make sure to click the action button before you leave the page.
If you go to another page without first clicking the action button, your changes are
not saved.
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Drop-down lists
A drop-down list lets you choose from a list of selections. Left-click
the drop-down button to open the list. Then, left-click on an item to
select that choice.
6.4.3.5
Text or Data Entry
Text boxes let you type data into a field. An action button may be
associated with a single text box, or a group of text boxes. For any
text box, left-click anywhere inside the box, type the desired
information into that field, and be sure to press [ENTER] when done.
Click the related action button to save the data.
If you edit any field, make sure to click the action button before you leave the
page. If you go to another page without first clicking the action button, your
changes are not saved.
6.4.4
45xxA Web Server Interface Menu Tree
The 45xxA Web Server Interface features four navigation tabs (shown in blue) located at the top
of each page. Nested page hyperlinks (gray) grant access to individual Web pages.
Home
Admin
Config
Status
Home
Access
Converter
Summary
Contact
SNMP
Ref
Faults
Support
Pre-selects
Utility
Redundancy
Click any tab or hyperlink to continue.
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6.4.5 45xxA Web Server Interface Page Descriptions
6.4.5.1
Home Pages
Click the Home tab, and then select the Home, Contact, or Support hyperlink to continue.
6.4.5.1.1
Home | Home
Use this page to identify the product and its current operating firmware version. Click the Home
tab and/or the nested Home hyperlink to return to this page from anywhere in the Web Server
Interface.
Figure 6-1. Home | Home page
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Home | Contact
Use this page to see the contact information (phone, fax, or Web/e-mail hyperlinks) for
Comtech EF Data Sales or Customer Support.
Figure 6-2. Home | Contact page
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Home | Support
For this page to operate correctly, the Administrator must define the SMTP server,
domain name, and destination on the Admin | Access page (see Sect. 6.4.5.2.1).
This page uses SMTP (Simple Mail Transport Protocol) to compose and send an e-mail message
to Comtech EF Customer Support ([email protected]). Use this communications
portal for questions about or problems with the unit.
Figure 6-3. Home | Support page
Contact Information
Provide your contact information – Name, Company, Telephone and E-mail – to Comtech EF
Data here.
Problem Report
Use this section to compose the required message of up to a maximum of 256 characters.
After providing your Contact Information and composing your message in the Problem Report
section, click [Submit Email] to send the message.
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Admin Pages
The Administrator must use these pages to set up user access.
The Admin pages are available only to users who have logged in using the
Administrator Name and Password.
Click the Admin tab, and then select the Access or SNMP hyperlink to continue.
6.4.5.2.1
Admin | Access
The Administrator must use this page to manage the 45xxA Web Server Interface user access
settings.
Figure 6-4. Admin | Access page
Click [Refresh] to update the page with its latest operating parameters.
Network Maintenance
•
IP Gateway, IP Address/Range: Enter the desired IP Gateway Address and IP Address/
Range in these text boxes.
•
MAC Address (read-only): The MAC is set at the factory to a guaranteed unique address that
cannot be modified by the user.
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Click [Change IP Address] to save. Otherwise, click [Reset] to revert to the previously assigned IP
Gateway and IP Address/Range,
System Account Access Information
•
Admin, Read/Write, and Read Only Names and Passwords:
The factory defaults for these names/passwords are:
o
Admin
comtech/comtech
o
Read/Write
opcenter/1234
o
Read Only
monitor/1234
Note the following:
o
These Name fields can be any alphanumeric combination with a maximum length of
10 characters.
o
These Password fields can be any alphanumeric combination with a maximum
length of 10 characters.
•
SMTP Server: Specify the mail server IP address from where you want to send the
e-mail.
•
SMTP Domain Name / Destination: The Administrator can assign the SMTP Domain
Name and Destination. This is required if the e-mail feature of the Home | Support page
(Sect. 6.4.5.1.3) is to be used.
o
For SMTP Domain Name, specify the domain of the e-mail server (usually found to
the right of the @ symbol in an e-mail address).
o
For SMTP Domain Destination, specify the e-mail recipient name (usually found to
the left of the @ symbol in an e-mail address).
Click [Submit Access] to save. Otherwise, click [Reset] to revert to the previously assigned
System Account Access Information.
Webpage Timeout
To set an automatic timeout to safeguard access to an already logged-in unit, use the dropdown list to set the time value as 5 minutes or 8 hours, and then click [Change].
The active session terminates if the unit remains idle (i.e., when no user activity occurs) beyond
the assigned Webpage Timeout. A valid user name and password is then required to resume the
45xxA Web Server Interface session.
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Admin | SNMP
The Administrator must use this page to manage the 45xxA SNMP (Simple Network
Management Protocol) settings.
Figure 6-5. Admin | SNMP page
Click [Refresh] to update the page with its latest operating parameters.
SNMP
•
Simple Network Management Operational Status: Use the drop-down list to select the
Simple Network Management operational setting as Enabled or Disabled.
•
The SNMP Read and Write Community String fields can be any combination of characters
and a length of 0 - 20 characters:
o
The factory default for the Read Community String parameter is public.
o
The factory default Write Community String is private.
•
Enable Authentication Trap: Use the drop-down list to select the Enable Authentication
Trap operational setting as Enabled or Disabled.
•
The Administrator can assign up to two SNMP Trap IP addresses and one SNMP Trap
Community String. The SNMP Trap Community String field can be any combination of
characters and a length of 0 - 20 characters:
o
•
The factory default for the Trap Community String is comtech.
Trap Version: Use the drop-down list to select the SNMP Trap Version as SNMPv1 or
SNMPv2c.
See Sect. 6.3 SNMP INTERFACE for details pertaining to the remaining configuration parameters
available on this page,
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Click [Submit SNMP] to save. Otherwise, click [Reset] to revert to the previously assigned SNMP
designations.
6.4.5.3
Config Pages
Click the Config tab, and then select the Converter, Ref, Pre-selects, Utility, or Redundancy
hyperlink to continue.
6.4.5.3.1
Config | Converter
Use this page to configure the communications, operations, and alarms/faults handling for the
DT-4500-A Downconverter.
Figure 6-6. Config | Converter page
Click [Refresh] to update the page with its latest operating parameters.
Converter
•
Frequency in MHz: Enter an operating RF Frequency; otherwise, this field will display as
N/A.
•
Attenuation (dB): Enter a valid attenuation level (00.00 to 20.00 dB) in 0.25 dB steps.
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Click [Change Configuration] to save. Otherwise, click [Reset] to revert to the previously
assigned parameters.
Mute
Use the drop-down list to select Configuration Mute Mode as On or Off, and then click [Change].
Carrier Mute Mode
Use the drop-down list to select Carrier Mute Mode as On or Off, and then click [Change].
Cold Start Mute
Use the drop-down list to select the Cold Start Mute function as On or Off, and then click
[Change].
Fault Recovery
Use the drop-down list to select the Fault Recovery function as MANUAL or AUTOMATIC, and
then click [Change].
Channel Slope Adjustment
Enter a slope value (0.0 to 1.0) in 0.1 steps. Click [Change] when done.
Serial
•
Interface Type: Use the drop-down list to select the operating serial mode as RS-485 or
RS-232.
•
Remote Address: Enter a valid remote control address from 0001 to 9999.
•
Baud Rate: Use the drop-down list to select the operating baud rate as 100, 2400, 4800,
9600, 19200 or 38400 baud.
•
Data bits – Parity – Stop Bits: Use the drop-down list to select the asynchronous character
format as:
o
8-N-1 (8 data bits, no parity, 1 stop bit)
o
7-O-2 (7 data bits, odd parity, 2 stop bits
o
7-E-2 (7 data bits, even parity, 2 stop bits).
Click [Change Serial Configuration] to save.
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Config | Ref
Use this page to review the operational parameters of, and to adjust, the reference oscillator.
Figure 6-7. Config | Ref page
Click [Refresh] to update the page with its latest operating parameters.
Reference Oscillator
•
External Reference Freq. (read-only): When an external reference oscillator is connected, its
operational value (i.e., 5 MHz or 10 MHz) is displayed here.
•
Reference Tuning (VDC) (read-only): The currently defined Reference Frequency tuning
adjustment is displayed here.
•
External Reference Lock (read-only): The External Reference Lock state is displayed here.
•
Tuning Adjustment (0-255): Enter a numeric value for the reference oscillator tuning
voltage here. The default value is 087, with allowable values from 0 to 255.
Click [Submit] to save.
External Reference Lock Detect Mask
Use the drop-down list to select the External Reference Lock Detect Mask function as FAULT or
MASKED, and then click [Submit] to save.
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Config | Pre-selects
Use this page to review the operational parameters of, and to adjust, the reference oscillator.
Figure 6-8. Config | Pre-selects page
Click [Refresh] to update the page with its latest configuration.
Pre-Selects
You may create (program) up to 32 operating configurations, and recall them as needed.
Note: Upon initial selection – i.e., prior to the creation of any pre-selects – the Frequency and
Attenuation columns are populated with null values.
To program any pre-select (Numbers 01 through 32), enter an operating RF frequency (in MHz),
and an attenuation level from 00.00 to 20.00 dB in 0.25 dB steps. Click [Change Configuration]
to save (program) the pre-select for future selection (recall).
Load Pre-Select
Use the drop-down list to select (recall) a previously defined pre-select from memory, and then
click [Change].
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Config | Utility
Use this page to configure DT-4500-A operating parameters.
Figure 6-9. Config | Utility page
Click [Refresh] to update the page with its latest operating parameters.
Date
Enter a date in the form MM/DD/YY (where MM = month [01 to 12], DD = day [01 to 31], and YY
= year [00 to 99]).
Time
Enter a time in the form HH:MM:SS (where HH = hour [00 to 23], MM = minutes [00 to 59], and
SS = seconds [00 to 59]).
Click [Change Date/Time] to save.
Circuit ID
Enter a Circuit ID string of up to 48 characters, and then click [Change CID] to save.
Current Active Firmware Image (read-only)
This section identifies the selected Current Active Firmware Image. In this example, Image 2 is
the Current Active Firmware Image.
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•
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Next Reboot Image: Use the drop-down list to select Image 1 or 2, and then click [Submit].
Perform Soft Reboot
Click [Reboot Now] to reboot the unit using the Current Active Firmware Image.
Firmware Information (read-only)
This scrollable window identifies the Bootrom, Bulk Image#1 and Bulk Image #2 firmware
information.
Part Number (read-only)
The part number for the unit is identified here.
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Config | Redundancy
See Appendix B. REDUNDANT SYSTEM OPERATION for the functional
description of this page.
Use this page to configure the DT-4500-A’s Redundancy Switch Mode.
Figure 6-10. Config | Redundancy page
(Top) Page with Redundancy Mode OFF
(Bottom) Page with Redundancy Mode ON
Click [Refresh] to update the page with its latest operating parameters.
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Status Pages
Use these pages to review operational statistics, status windows, and a logged fault table.
Click the Status tab, and then select Summary or Faults hyperlink to continue.
6.4.5.4.1
Status | Summary
Use this read-only page to review pertinent information about the configured setup of the
DT-4500-A, its current operating parameters, and the operational status of the unit.
Figure 6-11. Status | Summary page
Click [Refresh] to update the page with its latest operating parameters.
Typical for all sections, when operating parameters are within acceptable limits for any item, the
STATUS indicates OK within a green box. If a fault condition exists, the message box changes to
red with the FAULT indicated accordingly.
Terminal Status Change will state YES if the unit identifies any configuration settings updates
since the last reboot. Click [Clear] to reset this monitoring feature (Terminal Status Change will
then state NO).
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Status | Faults
Use this read-only page to review the DT-4500-A’s current logged operating faults.
Figure 6-12. Status | Faults page
Click [Refresh] to update the page with the latest reported faults.
Unread Stored Faults: ###
This read-only section features a scrollable window that displays the unread stored faults log in
sequential, date-stamped format. In the section header, ### denotes the running tally of unread
stored faults.
The unit returns and displays the five oldest stored faults in the alarm log. All faults that are read
from the log are automatically removed from the tally.
You can manage the Unread Stored Faults window as follows – select a choice, and then click
[Submit] to execute the window update:
•
Read Next Five Faults: Select to display the next five unread stored faults in the log.
•
Clear Fault Log: Select to clear all stored faults from the log.
•
Initialize Faults Pointer: Select to reset the internal pointer to allow queries to start at
the beginning of the stored faults log.
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Notes:
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Appendix A. REMOTE CONTROL
A.1
Introduction
This appendix describes the protocol and message command set for remote monitor and control
of the DT-4500-A Series Downconverters.
A.2
Communication Interfaces
The electrical interface is either an EIA-485 multi-drop bus (for the control of many devices) or
an EIA-232 connection (for the control of a single device), and data is transmitted in
asynchronous serial form, using ASCII characters. Control and status information is transmitted
in packets of variable length, in accordance with the structure and protocol defined in later
sections.
The Remote Control connector pinout is shown in Chapter 3.2.1.7 J1 COM1 EIA485/232 Interface Connector (DB-9F)
A.2.1
TIA/EIA-485 (RS-485)
For applications where multiple devices are to be monitored and controlled, a full-duplex (4wire plus ground) EIA-485 is preferred. Half-duplex (2-wire plus ground) EIA-485 is possible, but
is not preferred. In full-duplex EIA-485 communication, there are two separate, isolated,
independent, differential-mode twisted pairs, each handling serial data in different directions.
It is assumed that a 'Controller' device (a PC or dumb terminal) transmits data in a broadcast
mode via one of the pairs. Many 'Target' devices are connected to this pair, and all
simultaneously receive data from the Controller. The Controller is the only device with a linedriver connected to this pair; the Target devices have only line-receivers connected.
In the other direction: On the other pair, each Target has a tri-state line driver connected; the
Controller has a line-receiver connected. All the line drivers are held in high-impedance mode
until one – and only one – Target transmits back to the Controller. Each Target has a unique
address; each time the Controller transmits, the address of the intended recipient Target is
included in a framed 'packet' of data. All of the Targets receive the packet, but only one (the
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intended) will reply. The Target enables its output line driver and transmits its return data
packet back to the Controller in the other direction on the physically separate pair.
EIA-485 (Full Duplex) summary:
A.2.2
•
Two differential pairs - one pair for Controller-to-Target, one pair for Target-to-Controller.
•
Controller-to-Target pair has one line driver (Controller), and all Targets have line-receivers.
•
Target-to-Controller pair has one line receiver (Controller), and all Targets have tri-state
drivers.
TIA/EIA-232 (RS-232)
This is a much simpler configuration in which the Controller device is connected directly to the
Target via a two-wire-plus-ground connection. Controller-to-Target data is carried, via EIA-232
electrical levels, on one conductor, and Target-to-Controller data is carried in the other direction
on the other conductor.
A.2.3
Ethernet (100BASE-TX)
The unit implements a Telnet server that will accept Telnet terminal connections using
Transmission Control Protocol (TCP) on port 23. After entering the username (default: comtech),
and the password (default: comtech) the Telnet server will accept the same syntax used by the
serial interfaces.
A.3
Access Methods
Downconverters may be accessed directly by using a physical address or indirectly through a
backup downconverter by using a virtual address.
A.3.1
Direct Access
Converters may be directly accessed by the EIA-232 interface or by the EIA-485 interface in a
bus configuration.
In this control network, all converters including the backup converter are paralleled on a
common EIA-485 cable. Both up and down converters can be mixed on the cable as long as each
converter has a unique physical address. Only one EIA-485 port is required on the system's
monitor and control computer. If a change is initiated directly to a converter in a redundancy
subsystem, the backup converter will detect the change via the High Speed Bus and update its
backup tables.
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For EIA-232 control, a direct EIA-232 cable connection is made to each converter to be accessed.
If using an external Monitor and Control Computer, one EIA-232 port per converter is required.
This mode is commonly used with an ASCII terminal for bench testing.
A.3.2
Indirect Access
Converters in Redundancy Mode may be addressed indirectly by adding a virtual address to the
backup converter's physical address. The virtual address corresponds to the converter's position
in the redundant subsystem. The backup converter recognizes the virtual address and executes
the command via the high speed bus.
To control by using the EIA-485 interface, one or more backup converters are connected to a
system's monitor and control computer or ASCII terminal with a common EIA-485 bus cable.
Both up and down backup converters may be mixed on the cable as long as each has a unique
device address. In order to indirectly address an online converter in the subsystem, a virtual
address must be provided. The virtual address corresponds to the converter's position in the
chain beginning with number 1. Virtual addressing is only recognized by a backup converter.
Only one EIA-485 port is required on the monitor and control computer.
To control by using the EIA-232 interface, one EIA-232 port on the monitor and control
computer is required for each backup converter. Virtual addressing must be established by
command. All converters including the backup converter must be in the Redundancy Mode.
A.4
Addresses
All converters are addressed in a command by the Device Address. The Device Address consists
of a physical address or a physical address plus a virtual address.
A.4.1
Physical Address
Each converter in the system must have a unique physical address regardless of the access
method used. The physical address consists of a string of 1, 2 or 3 numbers from 1 to 255. The
physical address is entered into a converter via the front panel. For Direct Access, the physical
address is the only address required to command a converter. A backup converter or a
standalone converter can only be accessed with a physical address.
Example: 10 (Addresses converter whose physical address is 10.)
A.4.2
Virtual Address
In order to access a converter controlled by a backup converter indirectly, a virtual address is
required. A virtual address is appended to the physical address of the backup converter with a
"V". The virtual address is a number from 1 to 12 and corresponds to the position of the active
converter from the backup converter and is assigned by a configuration command.
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Example: 10V3 (Addresses the third converter controlled by the backup converter whose
physical address is 10.)
A.4.3
IP Address
The IP address is a unique address on a network that supports Internet Protocol (i.e., IPv4). An
example of a network address using IPv4 is 192.168.1.4 (factory default IP address). This value
must be configured correctly to allow a Telnet session to control the unit.
A.5
Basic Protocol
Whether in EIA-232 or EIA-485 mode, all data is transmitted as asynchronous serial characters,
suitable for transmission and reception by a UART.
All data is transmitted in framed packets. The Controller is assumed to be a PC or ASCII dumb
terminal that is in charge of the process of monitor and control. The Controller is the only device
that is permitted to initiate, at will, the transmission of data. Targets are only permitted to
transmit when they have been specifically instructed to do so by the Controller.
All bytes within a packet are printable ASCII characters, less than ASCII code 127. In this context,
the Carriage Return and Line Feed characters are considered printable.
All messages from Controller-to-Target require a response, with one exception: This will be either to
return data that has been requested by the Controller, or to acknowledge reception of an instruction
to change the configuration of the Target. The exception to this is when the Controller broadcasts a
message (such as Set Time/Date) using Address 0, when the Target is set to EIA-485 mode.
A.5.1
Transmission Mode
The transmission mode is half duplex implemented in Command/Response convention. This
method requires the external system monitor and control unit to initiate all communications by
command and all converters to respond with either confirmation or an error message. The
confirmation may contain status information.
A.5.2
Baud Rate
The supported baud rates are 1200, 2400, 4800, 9600 (default), 19200, and 38400 baud.
A.5.3
Asynchronous Character Format
The asynchronous character format is 8-N-1 (i.e., 8 data bits; no parity; 1 stop bit).
A.5.4
Character Set
The command syntax uses the printable ASCII character set.
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Response Timeout
A minimum of 500 milliseconds is provided before declaring a “no response” instance, at which
time the command is re-transmitted.
A.5.6
Bus Inactivity Requirement
Comtech EF Data recommends that a minimum of 50 milliseconds bus inactivity be provided by
the user between the receipt of a response from an addressed converter and issuing the next
command on the serial bus.
A.6
Message Structure
The structure of a Command, Response, or Error Message is as follows:
A.6.1
•
Start Character
•
Device Address
•
Command or Response
•
End of Message String
Start Character
The Start Character begins each message:
Example:
< Start of a user Command.
> Start of a converter response.
A.6.2
Device Address
The Device Address consists of a Physical Address or a Physical Address and an appended Virtual
Address. This document uses DEV for the generic case examples.
Example:
A.6.3
<3V12
Command
A Command is a variable length character string beginning with a forward slash “/”’ and
containing either an instruction or an instruction and data for a converter to act upon. If data is
passed by command it is appended to the instruction by an underscore “_”. If data is retrieved
by command, underscore follows the instruction, flagging the converter to supply data in a
response.
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Note: This appendix uses “/COM” for the generic case examples.
Example:
Example:
A.6.4
<DEV/COM_xxx'cr'
(Sends data to a converter.)
<DEV/COM_'cr' (Requests information from a converter.)
Confirmation Response
A confirmation will change the start character, and echo the Device Address and Command. Any
requested data will be appended to the Command.
Example:
A.6.5
>DEV/COM_xxx'cr''lf']
Error Response
If a converter cannot execute a Command or detects a protocol violation, an error response is
generated. An error is flagged by changing the “/” command designator in the response to a "?".
Following the "?" error symbol are two characters which are unique error symbols useful for
computer analysis. The two error symbols are followed by a text string explaining the error for
the convenience of a human operator. This appendix uses “ER” for the generic case examples
response.
Example:
A.6.6
>DEV?COM ER Error Message 'cr''lf']
End of Message
End of message strings were devised in such a way that an orderly screen presentation would
result when converters are controlled by simple ASCII terminals.
A.6.6.1
Command Ending
The end of message for a command is a carriage return. This appendix uses “cr” for the carriage
return.
Example:
A.6.6.2
<DEV/COM_'cr'
Response Ending
End of message for a response is a carriage return, line feed and a bracket: “'cr''lf']”.
Example:
>DEV/COM_'cr''lf']
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Command / Response Pairs
A.7.1
A.7.1.1
A.7.1.2
A.7.1.3
Utility Commands
Time
Command
Set Time:
Details
<DEV/TIM_hh:mm:ss'cr'
Confirmation:
Retrieve Time:
Confirmation:
Where:
hh=Hour
mm=Minutes
ss=Seconds
>DEV/TIM_hh:mm:ss'cr''lf']
<DEV/TIM_'cr'
>DEV/TIM_hh:mm:ss'cr''lf']
Date
Command
Set Date:
Details
<DEV/DAT_mm/dd/yy'cr’
Confirmation:
Retrieve Date:
Confirmation:
Where:
mm=Month
dd=Day
yy=Year
>DEV/DAT_mm/dd/yy'cr'lf']
<DEV/DAT_'cr'
>DEV/DAT_mm/dd/yy'cr''lf']
Time Protocol Enable
Use the TPE command to enable or disable the time protocol.
Command
Set Time Protocol:
Details
<DEV/TPE_x'cr’
Confirmation:
Retrieve TPE:
Confirmation:
Where:
x=
0 Time protocol disabled
1 Time protocol enabled
>DEV/TPE_x'cr'lf']
<DEV/TPE_'cr'
>DEV/TPE_x'cr''lf']
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Time Protocol Server
Use the TPS command to set the Time Server IP address for the Ethernet management port in the
format xxx.xxx.xxx.xxx.
A.7.1.5
Command
Set Time Protocol Server:
Details
<DEV/TPS_xxx.xxx.xxx.xxx'cr’
Confirmation:
Retrieve TPS:
Confirmation:
Where:
xxx.xxx.xxx.xxx is the Time server IP address.
>DEV/TPS_xxx.xxx.xxx.xxx'cr'lf']
<DEV/TPS_'cr'
>DEV/TPS_xxx.xxx.xxx.xxx'cr''lf']
Local / Remote Status
Use the LRS command to enable or disable remote communications interfaces. The factory default
setting is 3 (Ethernet and Serial remote control enabled).
Command
Set Local / Remote
Status:
Confirmation:
Retrieve LRS:
Confirmation:
A.7.1.6
Details
<DEV/LRS_x'cr’
Where:
x=
0 for front panel control only (remote control disabled)
1 for serial remote control
2 for Ethernet control
3 for Ethernet and serial remote control
>DEV/LRS_x'cr'lf']
<DEV/LRS_'cr'
>DEV/LRS_x'cr''lf']
Media Access Control (MAC) Address
Use the MAC command to query the unique MAC address of the unit’s Ethernet management
port.
Command
Retrieve MAC:
Confirmation:
Details
<DEV/MAC_'cr'
>DEV/MAC_xx-xx-xx-xx-xx-xx'cr''lf']
Where:
xx=MAC address byte in hexadecimal
A–8
DT-4500-A Series Downconverters
Appendix A
A.7.1.7
Revision 1
MN-DT4500A
IP Address
Use the IPA command to set the IP address and network prefix for the 100BASE-TX Ethernet
management port. The factory default value is 192.168.1.4.24.
A.7.1.8
Command
Set IP Address:
Details
<DEV/IPA_aaa.bbb.ccc.ddd.yy'cr’
Confirmation:
Retrieve IP Address:
Confirmation:
Where:
aaa = 0-223
bbb = 0-255
ccc = 0-255
ddd = 0-255, but they cannot all be zero.
yy is the Subnet Mask Length (range: 8 to 30)
>DEV/IPA_ aaa.bbb.ccc.ddd.yy'cr'lf']
<DEV/IPA_'cr'
>DEV/IPA_ aaa.bbb.ccc.ddd.yy'cr''lf']
IP Gateway
Use the IPG command to set the IP gateway address for the Ethernet management port. The
factory default value is 192.168.1.5.
A.7.1.9
Command
Set IP Gateway:
Details
<DEV/IPG_aaa.bbb.ccc.ddd'cr’
Confirmation:
Retrieve IP Gateway:
Confirmation:
Where:
aaa = 0-223
bbb = 0-255
ccc = 0-255
ddd = 0-255, but they cannot all be zero.
>DEV/IPG_ aaa.bbb.ccc.ddd'cr'lf']
<DEV/IPG_'cr'
>DEV/IPG_ aaa.bbb.ccc.ddd'cr''lf']
Physical Address
The default physical address is 001.
Command
Set Physical Address:
Confirmation:
Retrieve Phys. Addr:
Confirmation:
Details
<DEV/SPA_xxx'cr' xxx = 1 to 255
>DEV/SPA_xxx'cr''lf']
<DEV/SPA_'cr'
>DEV/SPA_xxx'cr''lf']
A–9
DT-4500-A Series Downconverters
Appendix A
A.7.1.10
Revision 1
MN-DT4500A
Baud Rate
The default baud rate is 9600.
Command
Set Baud Rate:
Confirmation:
Retrieve Baud Rate:
Confirmation:
A.7.1.11
Details
<DEV/SBR_xxxx'cr' xxxx = 1200, 2400, 4800, 9600, 19K2, or 38K4
>DEV/SBR_xxxx'cr''lf']
<DEV/SBR_xxxx'cr'
>DEV/SBR_xxxx'cr''lf']
LCD Contrast
This legacy command does not control any hardware, but its syntax is still supported to allow
backwards compatibility with existing monitor and control applications. The default LCD
contrast is 15.
Command
Set Contrast:
Confirmation:
Retrieve Contrast:
Confirmation:
A.7.1.12
Details
<DEV/CON_xx'cr' xx = 0 to 30
>DEV/CON_xx'cr''lf']
<DEV/CON_'cr'
>DEV/CON_xx'cr''lf']
LCD Brightness
This legacy command does not control any hardware, but its syntax is still supported to allow
backwards compatibility with existing monitor and control applications. The default LCD
brightness is 15.
Command
Set Brightness
Confirmation:
Retrieve Brightness:
Confirmation:
A.7.1.13
Details
<DEV/LCD_xx'cr' xx = 0 to 30
>DEV/LCD_xx'cr''lf']
<DEV/LCD_'cr'
>DEV/LCD_xx'cr''lf']
Screen Saver Mode
This legacy command does not control any hardware, but its syntax is still supported to allow
backwards compatibility with existing monitor and control applications. The default screen saver
mode is 0.
Command
Set SSM:
Confirmation:
Retrieve SSM:
Confirmation:
Details
<DEV/SSM_x'cr'
Where:
x=0 to 5
>DEV/SSM_x'cr''lf']
<DEV/SSM_'cr'
>DEV/SSM_x'cr''lf']
A–10
DT-4500-A Series Downconverters
Appendix A
A.7.1.14
Revision 1
MN-DT4500A
Screen Saver Timeout
This legacy command does not control any hardware, but its syntax is still supported to allow
backwards compatibility with existing monitor and control applications. The default screen saver
timeout is 05.
Command
Set SST:
Confirmation:
Retrieve SST:
Confirmation:
A.7.1.15
Details
<DEV/SST_xx'cr' xx = 00 to 99
>DEV/SST_xx'cr''lf']
<DEV/SST_'cr'
>DEV/SST_xx'cr''lf']
VFD Brightness
The VFD command allows the front panel brightness to be adjusted from 0% to 100% in 25%
steps. The default VFD brightness is 100.
Command
Set VFD:
Confirmation:
Retrieve VFD:
Confirmation:
A.7.1.16
Details
<DEV/VFD_xxx'cr' xx = 000 to 100 (in 025 steps)
>DEV/VFD_xxx'cr''lf']
<DEV/LCD_'cr'
>DEV/VFD_xxx'cr''lf']
Reference Oscillator Tuning
The default reference oscillator tuning value is 087.
Command
Set Oscillator:
Confirmation:
Retrieve Tuning:
Confirmation:
A.7.1.17
Details
<DEV/SRO_xxx'cr' xxx = 0 to 255
>DEV/SRO_xxx'cr''lf']
<DEV/SRO_'cr'
>DEV/SRO_xxx'cr''lf']
Converter Slope Adjustment
The default slope adjustment value is 0.3.
Command
Set Slope Adjust:
Confirmation:
Retrieve Slope Adjust:
Confirmation:
Details
<DEV/SSA_xxx'cr' xxx = 0.0 to 1.0
>DEV/SSA_xxx'cr''lf']
<DEV/SSA_'cr'
>DEV/SSA_xxx'cr''lf']
A–11
DT-4500-A Series Downconverters
Appendix A
A.7.1.18
Revision 1
MN-DT4500A
Equipment Type
Equipment type is a query that retrieves the model number and the software revision of the
unit. This data is read-only.
Command
Retrieve Equipment Type:
Confirmation:
A.7.1.19
Details
<DEV/RET_'cr'
>DEV/RET_xxxxxxxxxx yyyyyyy'cr’’lf']
xxxxxxxxxx = Model Number
yyyyyyy = Software Version.
Part Number
The PNM command retrieves the unit’s part number information. This data is read-only.
Command
Retrieve Part Number:
Confirmation:
Details
<DEV/PNM_'cr'
>DEV/PNM_xx…xx'cr’’lf']
Where:
xx…xx = up to 96 bytes of part number information
A.7.1.20
Legacy Firmware Information
This legacy firmware command no longer provides information about the unit’s firmware type.
It is included only to provide backwards compatibility with existing monitor and control software
applications. To query the unit’s firmware information refer to the FRM command.
Command
Retrieve Firmware Information:
Confirmation:
Details
<DEV/FRW_’cr’
>DEV/FRW_’cr’
BULK= FWnnnn-nr Ver=x.xx’cr’
M&C = FWnnnn-nr Ver=x.xx’cr’
FPGA= FWnnnn-nr Ver=x.xx’cr’’lf’]
Where:
nnnn-n
firmware number
r
firmware revision
x.xx
firmware version
Note:
BULK, M&C, and FPGA have different firmware numbers,
revisions, and versions among each other.
A–12
DT-4500-A Series Downconverters
Appendix A
A.7.1.21
Revision 1
MN-DT4500A
Firmware Information
This command returns information about the firmware loaded in the unit including firmware
numbers, versions, and release dates. This command replaces the legacy FRW command.
Command
Retrieve Firmware Information:
Confirmation:
Details
<DEV/FRM_’cr’
>DEV/FRM_’cr’
Boot: ’cr’
FW-AAAAAAA B.B.BB
Bulk1: ’cr’
FW-AAAAAAA B.B.BB
FW-AAAAAAA B.B.BB
FW-AAAAAAA B.B.BB
Bulk2: ’cr’
FW-AAAAAAA B.B.BB
FW-AAAAAAA B.B.BB
FW-AAAAAAA B.B.BB
DD/MM/YY’cr’
DD/MM/YY’cr’
DD/MM/YY’cr’
DD/MM/YY’cr’
DD/MM/YY’cr’
DD/MM/YY’cr’
DD/MM/YY’cr’’lf’]
Where:
FW-AAAAAAA = the firmware part number
B.B.BB = the version number
DD/MM/YY = Day/Month/Year firmware released
A.7.1.22
Firmware Image
This command allows a valid bulk image to be selected as the next active image during boot-up.
Command
Set Next FW Image:
Confirmation:
Retrieve Active FW Image:
Confirmation:
Details
<DEV/IMG_x'cr' x = 1 to 2
>DEV/IMG_x'cr''lf']
<DEV/IMG_'cr'
>DEV/IMG_x'cr''lf']
A–13
DT-4500-A Series Downconverters
Appendix A
A.7.1.23
Revision 1
MN-DT4500A
Application Identification
The Application Identification (AID) command allows a free form message to be created. It is
intended to identify either the satellite, transponder, beam, destination or other aspects of the
application that may be significant to operations.
The message length corresponds to capability of the LCD and is 48 characters in total. The
second line begins at character 25, therefore, blanks must be used after line 1 information in
order to space to line 2. A carriage return ends the command. Trailing blanks will be generated
to fill the LCD field. The AID display will alternate with the Equipment type display by use of the
clear function key on the front panel. The default is "AID MESSAGE".
Command
Application ID:
Confirmation:
Retrieve ID:
Confirmation:
Details
<DEV/AID_xxxxxxx ... xxxxx'cr'
>DEV/AID_'cr'
xxxxxxxxxxxxxxxxxxxxxxxx'cr'
xxxxxxxxxxxxxxxxxxxxxxxx'cr''lf']
<DEV/AID_'cr'
>DEV/AID_'cr'
xxxxxxxxxxxxxxxxxxxxxxxx'cr'
xxxxxxxxxxxxxxxxxxxxxxxx'cr''lf']
Note: xxxxxxx ... xxxxx = Your message, maximum 48 characters.
A.7.1.24
Force Reboot
The FRB command allows the unit to be forced to reboot after five seconds. This value is writeonly.
Command
Force Reboot:
Confirmation:
Details
<DEV/FRB_YES'cr'
>DEV/FRB_YES'cr''lf']
A–14
DT-4500-A Series Downconverters
Appendix A
A.7.2
Revision 1
MN-DT4500A
Configuration Commands
A.7.2.1
Frequency
The default RF frequency of the unit is equal to its minimum operating frequency (RFLow).
Command
Set Frequency:
Confirmation:
Retrieve Frequency:
Confirmation:
Details
<DEV/FRE_xxxxx.xxx'cr'
>DEV/FRE_xxxxx.xxx'cr''lf']
<DEV/FRE_'cr'
>DEV/FRE_xxxxx.xxx'cr''lf']
Note: For example, xxxx.xxx = 14000.000 to 14500.000 MHZ in 125 KHz steps for Model
UT-4514-A
A.7.2.2
Attenuator
The default attenuation value is 10.00 dB.
Command
Set Attenuator:
Confirmation:
Retrieve Attenuator:
Confirmation:
Details
<DEV/ATT_ yy.yy'cr'
>DEV/ATT_yy.yy'cr'lf']
<DEV/ATT_'cr'
>DEV/ATT_ yy.yy'cr''lf']
Note: yy.yy = 00.00 to 25.00 dB in 0.25 dB steps.
A.7.2.3
Cold Start
The cold start function, if enabled, mutes the output signal for a predetermined time following
Power-Up to ensure a stable reference oscillator (15 minutes). The default is OFF. This command
is disabled in redundant systems (i.e., COMMAND NOT AVAILABLE).
Command
Set Cold Start:
Confirmation:
Retrieve Status:
Confirmation:
Details
<DEV/CLD_xxx'cr' xxx = ON or OFF
>DEV/CLD_xxx'cr''lf']
<DEV/CLD_'cr'
>DEV/CLD_xxx'cr''lf']
A–15
DT-4500-A Series Downconverters
Appendix A
A.7.2.4
Revision 1
MN-DT4500A
Mute
The default RF mute state is ON (output is muted).
Command
Mute Output:
Confirmation:
Retrieve Mute Status:
Confirmation:
A.7.2.5
Details
<DEV/MUT_xxx'cr' xxx = ON or OFF
>DEV/MUT_xxx'cr''lf']
<DEV/MUT_'cr'
>DEV/MUT_yyy'cr''lf']
yyy = ON/OFF/COLD
Carrier Mute Mode
The carrier mute mode determines the mute state of the unit during frequency changes. The
default carrier mute mode state is OFF (output is muted during frequency changes).
Command
Mute Mode:
Confirmation:
Retrieve CMM Status:
Confirmation:
A.7.2.6
Details
<DEV/CMM_xxx'cr' xxx = ON or OFF
>DEV/CMM_xxx'cr''lf']
<DEV/CMM_'cr'
>DEV/CMM_xxx'cr''lf']
Redundant Mute Mode
The redundant mute mode determines how the backup unit handles the mute state during a
redundant switchover condition. If the redundant mute mode is ON then the backup unit’s mute
state will be the same as the primary unit that it is backing up. Otherwise, if the redundant mute
mode is off the backup unit will unmute its output any time a redundant switchover occurs.
The default redundant mute mode state is OFF (backup unit’s output automatically unmutes
when a redundant switchover occurs).
Command
Set CRM:
Confirmation:
Retrieve CRM:
Confirmation:
Details
<DEV/CRM_xxx'cr' xxx = ON or OFF
>DEV/CRM_xxx'cr''lf']
<DEV/CRM_'cr'
>DEV/CRM_xxx'cr''lf']
A–16
DT-4500-A Series Downconverters
Appendix A
A.7.2.7
Revision 1
MN-DT4500A
Auto Fault Recovery
The converter output is muted automatically in the event of a detected fault. Auto Fault
Recovery, if enabled, will cause the output signal to go active (unmuted) if all faults clear. If
disabled, the output will remain muted even after all faults clear until a MUT_OFF command is
received. If Auto Fault Recovery is enabled and the converter detects the same fault more than
five times in a five minute interval (ex: multiple IFLO lock detect faults) the function reverts to
DISABLED and the converter remains muted. The default is ON.
Command
Set Fault Recovery:
Confirmation:
Retrieve Status:
Confirmation:
A.7.2.8
Details
<DEV/AFR_xxx'cr' xxx = ON or 0FF
>DEV/AFR_xxx'cr''lf']
<DEV/AFR_'cr'
>DEV/AFR_xxx'cr''lf']
Program Preset
Use this command to store up to 32 preset frequency and attenuation settings.
Command
Program Preset:
Confirmation:
Details
<DEV/PGM_nn_xxxxx.xxx_yy.yy'cr'
>DEV/PGM_nn_xxxxx.xxx_yy.yy'cr''lf']
Note: nn = Preset Number = 01 to 32.
xxxx.xxx = Frequency = RFLow to RFHigh (for example, 14000.000 to 14500.000 MHZ for Model
UT-4514).
yy.yy = Attenuator = 00.00 to 25.00.
A.7.2.9
Display All Presets
Use this command to display all of the programmed preset values.
Command
Display Presets:
Confirmation:
Details
<DEV/DPS_'cr'
>DEV/DPS_'cr'
P01 xxxxx.xxx yy.yy'cr'
to
P32 xxxxx.xxx yy.yy'cr''lf']
Where:
xxxxx.xxx = Frequency
yy.yy= Attenuator
Note: Only programmed preset numbers are returned. If no preset(s) is programmed, “No PreSelects Programmed” is returned.
A–17
DT-4500-A Series Downconverters
Appendix A
A.7.2.10
Revision 1
MN-DT4500A
Clear Preset Configuration
Use this command to clear a single preset value.
Command
Clear a Preset:
Confirmation:
Details
<DEV/CLR_nn'cr'
>DEV/CLR_nn_Cleared'cr''lf']
Note: nn = Preset Number = 01 to 32.
A.7.2.11
Select Preset Configuration
Use this command to configure the converter to the frequency and attenuation data assigned to
a given preset number.
Command
Select Preset:
Confirmation:
Details
<DEV/SEL_nn'cr'
>DEV/SEL_nn_Selected'cr''lf']
Note: nn = Preset Number = 01 to 32.
Only programmed preset numbers are available.
A–18
DT-4500-A Series Downconverters
Appendix A
A.7.3
Revision 1
MN-DT4500A
Modes
There are two modes of operation that may intersect: Redundant Mode and Automatic Mode.
A.7.3.1
Redundant Mode
Since the default mode is OFF, each converter including the backup converter must be
commanded into the Redundant Mode.
Polling on the high speed bus will not begin until the position assignments are made.
Command
Redundant Mode:
Confirmation:
Redundant Status:
Confirmation:
Details
<DEV/RED_xxx'cr' xxx = ON or OFF
>DEV/RED_xxx'cr''lf']
<DEV/RED_'cr'
>DEV/RED_xxx'cr''lf']
Note: The primary units must all be configured properly in redundant mode before redundant
mode is enabled on the backup unit.
Each converter's chain position must be initialized including the backup converter. The following
redundancy initialization command is only allowed if Redundancy Mode has been selected.
Command
Initialize Command:
Confirmation:
Initialize Status:
Confirmation:
Details
<DEV/ICT_xx_yy'cr'
>DEV/ICT_xx_yy'cr''lf']
<DEV/ICT_'cr'
>DEV/ICT_xx_yy'cr''lf']
xx = chain position = 01 to 12, or BU. Where BUselects the converter as the
backup.
yy = chain length for xx = BU (i.e. Backup converter) 01 to 12.
yy = unused if xx = 01 to 12 (i.e. chain converter)
Example 1:
The following command assigns the converter chain position "1".
<DEV/ICT_01'cr'
>DEV/ICT_01'cr''lf']
Example 2:
The following command assigns the receiving converter as the backup converter
in a 1:8 system.
<DEV/ICT_BU_08'cr'
>DEV/ICT_BU_08'cr''lf']
Important: It should be reiterated that only the converter physically located at the top of a
redundant rack should be assigned as the Backup unit. Likewise, assignment of chain positions in
a redundant rack should be made according to the physical allocation of each converter in the
rack (i.e. The top converter should be the Backup, the second converter should be assigned
chain position 1, the third converter position 2, etc.).
A–19
DT-4500-A Series Downconverters
Appendix A
A.7.3.2
Revision 1
MN-DT4500A
Automatic/Manual Mode
This command provides for automatic switching by the backup converter if both units are in the
Redundancy Mode. This command is only accepted by the backup converter. If a chain converter
is set in Manual Mode, the backup converter will log the occurrence and not act upon further
information from the converter until put into Automatic Mode. The default is off.
Command
Automatic Mode:
Confirmation:
Automatic Status:
Confirmation:
A.7.3.3
Details
<DEV/SAM_xx_y'cr'
>DEV/SAM_xx_y'cr''lf']
<DEV/SAM_xx_'cr'
>DEV/SAM_xx_y'cr''lf']
Where: xx = 01 to 12, converter number
y = A for Auto; M for Manual
Backup Mode
This command allows the user to force a backup condition for maintenance and test purposes.
This command must be sent to the converter designated as the backup converter (i.e., “BU”).
When activated this command forces the backup converter to assume the state of the specified
chain converter and forces the chain converter offline.
Command
Initiate a Backup:
Confirmation:
Retrieve Backup Status:
Confirmation:
Details
<DEV/FBU_xx_y'cr'
>DEV/FBU_xx_y'cr''lf']
Where: xx = 01 to 12, converter number
y = ‘F’ to force a backup ‘N’ to remove a backup
<DEV/FBU_'cr'
>DEV/FBU_xx_zzzzz'cr''lf']
Where: xx = 01 to 12, converter number. If zzzzz = NONE, converter
number is not displayed.
zzzzz = ‘NONE’ if no backup active
= ‘ACTIVE’ if an automatic backup has occurred
= ‘FORCED’ if a forced backup is active
A–20
DT-4500-A Series Downconverters
Appendix A
A.7.4
Revision 1
MN-DT4500A
Status Commands
Status commands retrieve configuration, maintenance and alarm status in summary form.
A.7.4.1
Configuration Status
Command
Configuration Status:
Confirmation:
Details
<DEV/RCS_'cr'
>DEV/RCS_'cr'
FRE_xxxxx.xxx'cr' Frequency
ATT_yy.yy'cr'
Attenuator
TX_nnn'cr'
Transmitter - ON/OFF/COLD
ONL_nnn'cr'
Online - ON/OFF
RED_xx_yy_z'cr'
See Note
CLD_nnn'cr'
Cold Start - ON/OFF
AFR_nnn'cr'
Auto Flt Recovery-ON/OFF
EXT_xxx'cr''lf']
Ext. Ref. - YES/NO
Note: If Redundancy OFF xx_yy_z = OFF, else if Redundancy ON and converter selected as
backup controller xx_yy_z = BU_yy where yy is the number of converters in the chain (i.e. 01 to
12), else if Redundancy ON and converter selected as a chain unit xx is the converter number (01
to 12), and z = A if Auto Mode or M if Manual Mode.
A.7.4.2
Maintenance Status
Command
Maintenance Status:
Confirmation:
Details
<DEV/RMS_'cr'
>DEV/RMS_'cr'
P15_xx.x'cr'
P14_xx.x'cr'
VCC_x.x'cr'
5VD_x.x'cr'
TEM_xx'cr'
IFL_xx.x'cr'
SUM_xx.x'cr'
COR_xx.x'cr'
FIN_xx.x'cr''lf']
A–21
15 Vdc Supply
14 Vdc Supply
VCC Supply
Display 5 Vdc
Temperature
IFLO Tuning
Sum Loop Tuning
Coarse Loop Tune
Fine Loop Tuning.
DT-4500-A Series Downconverters
Appendix A
A.7.4.3
Utility Status
Command
Utility Status:
Confirmation:
A.7.4.4
Revision 1
MN-DT4500A
Details
<DEV/RUS_'cr'
>DEV/RUS_'cr'
COMM_aaaaaa'cr' RS-232 or RS-485
ADD_xxx'cr'
Address (001 to 255)
BR_nnnn'cr'
Baud Rate (1200, 2400, 4800, 9600,
19K2, or 38K4)
FMT_x-y-z’cr’
Data Format x=data, y=parity, z=stop
bit (8-N-1, 7-E-2, 7-O-2)
REF_xxx'cr'
Osc. Adjust (000 to 255)
SLP_x.x'cr'
Slope Adjust (0.0 to 1.0)
CON_xx'cr'
LCD Contrast (0 to 30)
LCD_xx'cr''lf']
LCD Brightness (0 to 30).
Alarm Status
Command
Alarm Status:
Confirmation:
Details
<DEV/RAS_'cr'
>DEV/RAS_'cr'
P15_xx'cr'
15 Vdc Fault
P14_xx'cr'
14 Vdc Fault
VCC_xx'cr'
VCC Fault
5VD_xx'cr'
5VD Fault
TEM_xx'cr'
Temperature Fault
IFL_xx'cr' IFLO Lock Fault
SUM_xx'cr'
Sum Lock Fault
COR_xx'cr'
Coarse Lock Fault
FIN_xx'cr'Fine lock Fault
HSB_xx’cr’
High Speed Bus Fault
*REF_xx'cr''lf']
Ref. Lock Fault
xx = OK or FT
Note: REF_xx is only returned if an external reference is present.
A.7.4.5
Summary Alarm Status
Summary alarm is set to Fault (FT) if any items in Sect. A.7.4.4 are faulted.
Command
Summary Alarm:
Confirmation:
Details
<DEV/SAS_'cr'
xx = OK or FT
>DEV/SAS_xx'cr''lf']
A–22
DT-4500-A Series Downconverters
Appendix A
A.7.4.6
Revision 1
MN-DT4500A
Terminal Status Change
The TSC_ command can be used to determine if the status of the terminal has changed since it
was last polled. If any of the parameters listed in the RCS or RUS commands have changed as a
result of user front panel operations or remote operations or if any new fault condition occur
the TSC_ command will return YES. The TSC_ command will then continue to return YES until
any of the following commands are received: RCS_, RUS_, RAS_, PACRCS_, PACRUS_, or PACRAS.
Command
Configuration Status:
Confirmation:
A.7.4.7
Details
<DEV/TSC_'cr’
>DEV/TSC_nnn'cr''lf']
nnn=YES/NO
Packed Configuration Status
Configuration Status:
<DEV/PACRCS_'cr'
Confirmation:
>DEV/PACRCS_aaaabbbcdeffgghijkl'cr''lf']
where:
aaaa = # of 125kHz steps above base frequency1
bbb
= # of 0.25 dB steps above 0.00 dB2
c
= 1 if Transmitter ON, 0 if OFF, 2 if Cold
d
= 1 if unit ONLINE, 0 if OFFLINE
e
= 1 if Redundancy ON, else 0
ff
= converter # (01-12,BU or 00 if e = 0)
gg
= 00 if 'ff' is 00 (redundancy OFF)
gg
= chain length (01-12) if 'ff' is BU
gg
= XX if 'ff' = 01 - 12
h
= A if Auto Mode, M if Manual3
I
= 1 if Cold Start Enabled, else 0
j
= 1 if Auto recovery enabled, else 0
k
= 1 if an Ext. Ref is present, else 0
l
= 1 if Remote Mode, 0 if Local Mode
Notes:
1. If the converter is 1 kHz step size, this will be the number of 1 kHz steps above the base
frequency
2. If the converter is 0.1 -dB step size, this will be the number of 0.1 -dB steps above the
base frequency
3. If it is a backup converter, it is always ‘A’
A–23
DT-4500-A Series Downconverters
Appendix A
A.7.4.8
Revision 1
MN-DT4500A
Packed Maintenance Status
Packed Maintenance Status: <DEV/PACRMS_'cr'
Confirmation:
>DEV/PACRMS_aabbccddeeeffgghhii'cr''lf']
where:
aa
= V15 scaled 123mV per count (0x00 - 0xFF)
bb
= V14 scaled 123mV per count (0x00 - 0xFF)
bc
= VCC scaled 39mV per count (0x00 - 0xFF)
dd
= V5D scaled 39mV per count (0x00 - 0xFF)
eee
= signed Temperature in degrees C (-10 to +60)
ff
= IFLO tune scaled 67mV per count (0x00 - 0xFF)
gg
= SUM tune scaled 54mV per count (0x00 - 0xFF)
hh
= COARSE tune scaled 78mV per count(0x00 - 0xFF)
ii
= FINE tune scaled 89mV per count (0x00 - 0xFF)
A.7.4.9
Packed Utility Status
Packed Utility Status:
<DEV/PACRUS_'cr'
Confirmation:
>DEV/PACRUS_abbcdeeffghhii'cr''lf']
where:
a
= 0=EIA-232, 1=EIA-485
bb
= Address in hex (01 to FF)
c
= 0 if Baud Rate 38400
= 1 if Baud rate 19200
= 2 if Baud rate 9600
= 3 if Baud rate 4800
= 4 if Baud rate 2400
= 5 if Baud rate 1200
d
= 0 if Data Format 8-N-1
= 1 if Data Format 7-E-2
= 2 if Data Format 7-O-2
ee
= Osc. Adjust in hex (00 to FF)
ff
= Slope Adjust times by 10 (00 to 10)
g
= Always 0, unused
hh
= LCD Contrast (0 to 30)
ii
= LCD Brightness (0 to 30)
A–24
DT-4500-A Series Downconverters
Appendix A
A.7.4.10
Revision 1
MN-DT4500A
Packed Alarm Status
Packed Alarm Status:
<DEV/PACRAS_'cr'
Confirmation:
>DEV/PACRAS_abcdefghijk'cr''lf']
where:
a
= 1 if V15 Fault, else 0
b
= 1 if V14 Fault, else 0
c
= 1 if VCC Fault, else 0
d
= 1 if V5D Fault, else 0
e
= 1 if TEMP Fault, else 0
f
= 1 if IFLO Fault, else 0
g
= 1 if SUM Fault, else 0
h
= 1 if COARSE Fault, else 0
I
= 1 if FINE Fault, else 0
j
= 1 if HSB Fault, else 0
k
= 1 if EXT REF Fault, else 0
A–25
DT-4500-A Series Downconverters
Appendix A
A.7.5
Revision 1
MN-DT4500A
Stored Alarms
Up to 100 alarms are date/time stamped and stored in memory as they occur. The alarm entry is
also updated with its date/time of clearance. The entry remains in memory until it is cleared by
command.
A.7.5.1
Total Stored Alarms
This command retrieves the total number of stored alarms and the time and date of the most
recent alarm.
Retrieve Total Alarms: <DEV/TSA_'cr'
Confirmation:
>DEV/TSA_TOTAL:nn'cr'
LAST:hh:mm:ss mm/dd/yy'cr''lf']
where:
nn
= 0 to 99; the 100th alarm will be ER
hh.mm.ss
= time in hour:minute:second
mm/dd/yy
= date in month/day/year
A.7.5.2
Clear All Stored Alarms
Clear Alarms:
Confirmation:
A.7.5.3
<DEV/CAA_YES'cr'
>DEV/CAA_CLEARED'cr''lf']
List All Alarms
This command retrieves a list of the stored alarms. This command is currently unavailable when
using virtual addressing mode.
List All Alarms:
<DEV/LAA_'cr'
Confirmation:
>DEV/LAA_'cr'
xx yyyyyyyyyyy hh:mm:ss mm/dd/yy'cr'
"
"
"
"
"
"
"
"
xxx yyyyyyyyyyy hh:mm:ss mm/dd/yy'cr''lf']
Where:
xx
= stored fault number
yyyyyyyyyyy
= fault description
hh:mm:ss
= fault time
mm/dd/yy
= fault date
A–26
DT-4500-A Series Downconverters
Appendix A
A.7.6
Revision 1
MN-DT4500A
Error Processing
A.7.6.1
General Errors
The following Error Responses may be generated by any command instead of a confirmation:
>DEV?COM CU CMD UNRECOGNIZED'cr''lf']
>DEV?COM IP INVALID PARAM'cr''lf']
>DEV?COM PE PARITY ERROR'cr''lf']
A.7.6.2
Configuration Errors
The following Error Responses may be generated by configuration commands:
>DEV?COM LO DEVICE IN LOCAL MODE'cr''lf']
A.7.6.3
Mode Errors
The following Error Responses may be generated by Mode selection:
>DEV?COM AE ONLY VALID WHEN BACKUP'cr''lf']
>DEV?COM OE OFFLINE NOT AVAILABLE'cr''lf']
>DEV?COM CN COMMAND NOT AVAILABLE'cr''lf']
A.7.6.4
Time-Outs
A time-out should be assumed if there is no response in 500 milliseconds. The station monitor
and control computer should try at least three times.
A–27
DT-4500-A Series Downconverters
Appendix A
Revision 1
MN-DT4500A
A.7.7
Command Summaries
A.7.8
User Remote Command Summary
Utility
Set Time
Set Date
Set Time Protocol
Set Time Protocol IP Address
Set Local / Remote Status
Get MAC Address
Get IP Address
Get IP Gateway
Set Physical Address
Set Baud Rate
Set LCD Contrast
Set LCD Brightness
Set Screen Saver Mode
Set Screen Saver Timeout
Set VFD Brightness
Set Reference Oscillator
Set Converter Slope Adj.
Get Equipment Type
Get Part Number
Get Legacy Firmware Information
Get Firmware Information
Set Firmware Image
Set Application ID Message
Set Force Reboot
Commands
<DEV/TIM_hh:mm:ss'cr'
<DEV/DAT_mm/dd/yy'cr'
<DEV/TPE_x'cr’
<DEV/TPS_xxx.xxx.xxx.xxx'cr’
<DEV/LRS_x'cr'
<DEV/MAC_ 'cr'
<DEV/IPA_'cr'
<DEV/IPG_'cr'
<DEV/SPA_xxx'cr'
<DEV/SBR_xxxx'cr'
<DEV/CON_xx'cr'
<DEV/LCD_xx'cr'
<DEV/SSM_x'cr'
<DEV/SST_xx'cr'
<DEV/VFD_xxx'cr'
<DEV/SRO_xxx'cr'
<DEV/SSA_xxx'cr'
<DEV/RET_'cr'
<DEV/PNM_'cr'
<DEV/FRW_'cr'
<DEV/FRM_'cr'
<DEV/IMG_x'cr'
<DEV/AID_xxxxx...xxxxx'cr'
<DEV/FRB_YES'cr'
Configuration
Set Frequency
Set Attenuation
Select Cold Start Mode
Mute/Unmute Converter
Set Carrier Mute Mode
Set Redundant Mute Mode
Set Fault Recovery Mode
Set a Preset
Get All Presets
Clear a Preset
Select a Preset
Commands
<DEV/FRE_xxxxx.xxx'cr'
<DEV/ATT_xx.xx'cr'
<DEV/CLD_xxx'cr'
<DEV/MUT_xxx'cr'
<DEV/CMM_xxx'cr'
<DEV/CRM_xxx'cr'
<DEV/AFR_xxx'cr'
<DEV/PGM_nn_xxxxx.xxx_yy.yy'cr'
<DEV/DPS_'cr'
<DEV/CLR_nn'cr'
<DEV/SEL_nn'cr'
Redundancy Mode
Select Redundancy ON/OFF
Configure Redundant Converter
Select Auto/Manual Mode
Forced Backup Mode
Commands
<DEV/RED_xxx’cr’
<DEV/ICT_xx_yy’cr’
<DEV/SAM_xx_y'cr'
<DEV/FBU_xx_y'cr'
A–28
DT-4500-A Series Downconverters
Appendix A
Revision 1
MN-DT4500A
Status
Retrieve Configuration Status
Retrieve Maintenance Status
Retrieve Utility Status
Retrieve Alarm Status
Summary Alarm Status
Terminal Status Change
Packed Configuration Status
Packed Maintenance Status
Packed Utility Status
Packed Alarm Status
Commands
<DEV/RCS_'cr'
<DEV/RMS_'cr'
<DEV/RUS_'cr'
<DEV/RAS_'cr'
<DEV/SAS_'cr'
<DEV/TSC_'cr'
<DEV/PACRCS_'cr'
<DEV/PACRMS_'cr'
<DEV/PACRUS_'cr'
<DEV/PACRAS_'cr'
Stored Alarm
Retrieve Total Stored Alarms
Clear All Stored Alarms
List All Stored Alarms
Commands
<DEV/TSA_'cr'
<DEV/CAA_YES'cr'
<DEV/LAA_'cr'
A–29
DT-4500-A Series Downconverters
Appendix A
Revision 1
MN-DT4500A
Notes:
A–30
Appendix B. REDUNDANT
SYSTEM OPERATION
B.1
Introduction to Redundancy Operation
The Comtech EF Data DT-4500-A Series Downconverters are configured for redundant system
operation using distributed protection switching in an active "Daisy Chain" configuration.
Comtech EF Data's proprietary "Daisy Chain" configuration distributes the downconverter
protection switching functions in the downconverters. This provides a system capability to
backup from 1 to 12 online downconverters.
A High Speed Bus (HSB) provides the communications interface between the backup and online
downconverters to detect faults and reconfigure the subsystem to replace the failed
downconverter. When a faulted downconverter is removed from active operation, it is detached
from the active downconverter chain by separating the downconverter from its switch module,
leaving the active online downconverter chain intact through the switch module. The chain can
be extended without affecting the online downconverter operation.
The active "chained" downconverters in a redundancy subsystem can also be indirectly
controlled through the backup downconverter using the remote serial communication link – this
capability is discussed in Appendix A. REMOTE CONTROL.
B–1
DT-4500-A Series Downconverters
Appendix B
B.2
Revision 0
MN-DT4500A
Backup Downconverter
The "Daisy Chain" terminates in the backup downconverter. The backup downconverter has a
microprocessor, which performs fault detection, self-reconfiguration and the logical switching
functions. If the backup downconverter does not have a fault, it will assume the frequency and
attenuation of the faulted downconverter and compensate for the chain losses. This capability is
accomplished through the operation of the HSB and the online downconverter detachable
switch modules.
B.2.1 High Speed Bus (HSB)
In the "Daisy Chain" configuration, the backup downconverter communicates with the online
units through the HSB. The backup downconverter is able to detect faults and reconfigure itself
to replace the faulted downconverter. The HSB interface is also used in the backup
downconverter to monitor configuration changes made to an online downconverter. Changes in
frequency, gain, or polarity are immediately entered into the backup table as well as
information from new online units. The high-speed bus does not interfere with the remote serial
communication link access to any of the downconverters in the chain.
B.2.2 Detachable Modules
Comtech EF Data's downconverters are designed with a detachable Input/Output Module (IOM),
which contain the signal path connectors. The IOM is utilized for single thread operation, or for
testing of the unit.
For redundant "Daisy Chain" operations, the on-line downconverters are provided with a
detachable Receive Switch Module (RSM) replacing the IOM.
Refer to Chapter 3. REAR PANEL CONNECTORS, Sect. 3.2.2.2 for quick reference tables for the
modules available to both the DT-4500-A Series Downconverters and the UT-4500-A Series
Upconverters.
B.2.2.1
Downconverter Switching
The RSM contains IF switches for input/output looping of the signal. Options for the RSM include
SMA connectors for the RF Input signal, and 50 or 75Ω BNC connectors for the IF.
B–2
DT-4500-A Series Downconverters
Appendix B
B.3
Revision 0
MN-DT4500A
Redundant Configurations
Comtech EF Data DT-4500-A Series Downconverters can be configured in several different
redundant subsystem "Daisy Chain" configurations to meet the reliability requirements of a
communication system. These configurations include:
•
•
1:1 Redundant Systems
o
Single Source IF Output Configuration: The online downconverter uses an IF transfer
switch to switch the IF signal. A single switched IF output is provided to and from the
online downconverter. The transfer switches are contained in the RSM installed in the
online downconverter. When a fault occurs in the online downconverter, the RSM is deactivated to switch out the online downconverter, and switch the IF output to the
backup downconverter. Figure B-1 depicts the cable connections between the
downconverters. Figure B-2 shows the block diagram of this 1:1 redundant
downconverter configuration.
o
Dual Source IF Output Configuration: Two IF outputs, IF Output #1 (priority) and IF
Output #2, are switched in the RSM to provide redundant operation of the
downconverters. The downconverters provide two switched IF outputs, IF Output #1
(priority) and IF Output #2. If Downconverter #1 faults, Downconverter #2 backs up the
priority channel and IF Signal #2 is not operational. Figure B-5 depicts the cable
connections between the downconverters. Figure B-6 shows the block diagram of the
1:1 redundant, dual source RF input, downconverter configuration.
1:N Redundant Systems
o
An IF switch in the RSM is used to switch the IF output of a faulted online
downconverter to the backup downconverter. Figure B-7 depicts the cable connections
between the downconverters. Figure B-8 shows the block diagram for this 1:N
redundant "Daisy Chain" downconverter configuration.
B–3
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Figure B-1. 1:1 Redundant Configuration –Single Source IF Output with IOM-XX and
RSM-XX Installed
Figure B-2. 1:1 Redundant Configuration Diagram – Single Source IF Output with IOM-XX
and RSM-XX Installed
Figure B-3. 1:1 Redundant Configuration Diagram – Single Source RF Input w/IOM-XX and
TSEQM-XX Installed
B–4
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Figure B-4. TSEQM Connection Locations
Figure B-5. 1:1 Redundant Configuration – Dual Source IF Output
Figure B-6. 1:1 Redundant Configuration Diagram – Dual Source IF Output with IOM-XX and
RSM-XX Installed
B–5
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Figure B-7. Dual Source 1:N Redundant Configuration with PSM-XX and RSM-XX Installed
B–6
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Figure B-8. Dual Source 1:N Redundant Configuration Diagram with PSM-XX and RSM-XX Installed
B–7
DT-4500-A Series Downconverters
Appendix B
B.4
Revision 0
MN-DT4500A
Redundant System Configuration
B.4.1 Redundant System Configuration Using the Front Panel
Chapter 5. FRONT PANEL OPERATION
B.4.1.1
Initial Configuration
Redundant system configuration is controlled from the downconverter’s front panel
configuration menu. Each online unit is assigned a redundancy configuration address. This
address is dependent on the location of the online downconverter with reference to the backup.
The unit closest to the backup must be Downconverter # 1. The next unit down must be
Downconverter # 2. Figure B-9 shows the appropriate entries for a 1:3 system.
STATUS
POWER ON
ON LINE
TRANSMIT
FAULT
REMOTE
STORED FAULT
REDUNDANCY-CONFIG?-ON---CONVERTER-#-BU---1:03--
STATUS
POWER ON
ON LINE
TRANSMIT
FAULT
REMOTE
STORED FAULT
REDUNDANCY-CONFIG?-ON---CONVERTER-#-01----POL-1
STATUS
POWER ON
ON LINE
TRANSMIT
FAULT
REMOTE
STORED FAULT
REDUNDANCY-CONFIG?-ON---CONVERTER-#-02----POL-1
STATUS
POWER ON
ON LINE
TRANSMIT
FAULT
REMOTE
STORED FAULT
REDUNDANCY-CONFIG?-ON---CONVERTER-#-03----POL-1
Figure B-9. Front Panel Displays
Configure the online units first, and then configure the backup unit. Redundant polling starts
when the backup is configured. If this polling starts before the online units are configured, a
B–8
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
high-speed bus fault will result. This fault should clear when configuration is completed. At this
point, control of the redundant system is performed from the backup downconverter.
In a single polarity system set “POL=1” on all online units. In a dual polarity system, where the
BU has a Polarity Switch Module (PSM) installed, configure each unit to represent the RF feed it
is connected to POL=1 or POL=2. See Figure B-7.
B.4.1.2
Automatic Configuration Verification
Figure B-10 shows the system configured for automatic (A) operation. In this mode, failure of an
online downconverter will automatically cause a switchover to the redundant unit to occur. In
the field, the simplest way to test this mode is to turn off an online unit. The AUTO/MANUAL
selection is made in the downconverter. The online units will report their status as shown in
Figure B-10.
Figure B-10. System in Auto Redundant Mode
B–9
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Figure B-11 depicts the front panel displays after power has been turned off on Downconverter
#1. Note the ON LINE LED is illuminated on the backup downconverter. This indicates that the
backup is now providing the frequency translation in place of the online unit. As soon as power
is restored, Downconverter #1 will come back online.
Figure B-11. Backup of Downconverter #1
B–10
DT-4500-A Series Downconverters
Appendix B
B.4.1.3
Revision 0
MN-DT4500A
Manual Configuration and Verification
Figure B-12 shows the system with Downconverter #1 configured for manual (M) operation. In
this mode, the backup downconverter can force switchover of an online unit. This mode also
overrides fault status detection of the online units performed by the backup downconverter. If
an online unit is configured to manual mode and this unit faults, no switchover will occur.
Figure B-12. Downconverter #1 in MANUAL, Others in AUTO
B–11
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Figure B-13 shows the front panel displays after the backup has forced Downconverter #1
offline. Note the ON LINE LED allows the user to tell whether the backup is currently active and
which downconverter is being bypassed.
Figure B-13. Forced Backup of Downconverter #1
B–12
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
B.4.2 Redundant System Configuration using the 45xxA Web Server
Interface
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
Monitoring and configuration of redundancy operations is possible using the 45xxA Web Server
Interface. Click the Config tab, and then select the Redundancy hyperlink to continue.
Figure B-14. Config | Redundancy page
Click [Refresh] to update the page with its latest operating parameters.
Online Status
This read-only section identifies the unit’s status as ONLINE or OFFLINE.
Redundancy Mode
Use the drop-down list to select Redundancy Mode as OFF or ON, and then click [Change].
Chain Position
Use the drop-down list to assign the unit’s Chain Position as the Backup Unit, or Unit 01 through
Unit 12.
B–13
DT-4500-A Series Downconverters
Appendix B
•
Revision 0
MN-DT4500A
Chain Length (Backup Unit): Use the drop-down list to select N/A, or 1:1 through 1:12.
• Polarity (Primary Down Converter): Use the drop-down list to select N/A, Single, or Dual.
Click [Change] to save.
Forced Backup
Use the drop-down list to set the Forced Backup as NONE, or Unit 01 through Unit 12, and then
click [Change].
Redundancy Mute Mode
Use the drop-down list to set the Redundancy Mute Mode as OFF or ON, and then click
[Change].
Primary Unit Status
This section is populated on a per-unit basis as the daisy chain is configured. Information is
provided for each unit’s Online Status (Online or Offline), Operating RF Frequency, Attenuation,
Mute status, and Polarity. Additionally:
•
Auto Mode: Use the drop-down list to select a unit’s switching mode as Manual or
Automatic.
•
Offset: Enter an offset adjustment value here. See Sect. B.4.3 for additional information.
Click [Change] to save.
B.4.3 Offset Adjustment
The offset is used to compensate for cable and switch losses. When the system is initially set up
and tested, each downconverter needs to be forced to backup and the offset adjusted to
minimize gain mismatch between the normal and bypassed mode. This offset will be different
for each downconverter and is stored in a table in the backup unit. Follow these steps to set the
offset:
Step
Description
1
Connect a signal source to the input and a power meter or spectrum analyzer to the output of the first
online downconverter.
2
Record the output power.
3
Force a backup of the first online unit and adjust the offset until the output power matches what was
recorded in Step 2.
4
Restore the online unit and repeat for the other online units.
B–14
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
B.4.4 Redundancy Systems – Downconverter Removal and Replacement
In a redundancy system, to remove an “inline” downconverter for repair, the following
procedure must be used:
Step
Description
1
Force backup of faulted unit.
2
Turn the power switch on the inline downconverter rear panel to OFF, and remove the power cord from the
downconverter. DO NOT disconnect the RF and IF cables from the RSM.
3
Unscrew the mounting screws on the RSM first, and then unscrew the rack mounting screws on the front
panel of the downconverter.
4
From the rear of the inline downconverter, hold the RSM and push the downconverter to the front of the
rack until the RSM Module is free of the downconverter chassis.
5
Remove the inline downconverter from the front of the rack.
To install the replacement unit, the following procedure must be used.
Step
Description
1
Power up the new unit on the bench.
2
Configure the new unit for the correct redundancy settings (Redundant = ON, Address = match old unit)
and correct frequency and attenuation.
3
Power off the new unit.
4
Remove existing personality module from the new unit.
5
Carefully install the new unit into the rack. The existing module in the rack will be plugged into the new unit.
6
Power up the new unit and un-force the backup.
To remove a “Backup” downconverter for repair, the following procedure must be used:
Step
Description
1
Turn the power switch on the backup downconverter rear panel to OFF, and remove the power cord from
the downconverter. Disconnect the RF and IF cables from the IOM.
2
Unscrew the rack mounting screws on the front panel of the backup downconverter.
3
Remove the backup downconverter from the front of the rack.
B–15
DT-4500-A Series Downconverters
Appendix B
Revision 0
MN-DT4500A
Notes:
B–16
Appendix C. MAINTENANCE A ND
TROUBLESHOOTING
C.1
Overview
This appendix serves to assist operator and maintenance personnel in the checkout,
maintenance and troubleshooting of the DT-4500-A Series Downconverters.
Comtech EF Data recommends that spare replacement converters be used to replace converters
removed from the system for maintenance. Troubleshooting procedures are provided for fault
isolation to the module level.
The input and output signals, the interconnecting cables and the location of the modules are as
shown in Figure C-1.
Figure C-1. Downconverter Signal and Interconnecting Diagram (with Transmit Switch Module
[TSM])
C–1
DT-4500-A Series Downconverters
Appendix C
C.2
Revision 1
MN-DT4500A
Maintenance Testing
The DT-4500-A Series Downconverters translate the input RF frequency to an output IF
frequency. The RF input level is -45 dBm (typical), and the RF output level is 0 dBm (typical).
To prepare for checkout, review the rack mounting information provided in Chapter 2.
INSTALLATION. Operations via the front panel (i.e., use of the menu system, keypad, and VFD)
are explained in detail in Chapter 5. FRONT PANEL OPERATION.
C.2.1 Test Point Samples
The IF output and RF input can be monitored at the RF Sample Test Points on the front panel. A
BNC connector is provided for the IF sample and an SMA connector is provided for the RF
output. The RF sample output level is -20 dBc nominal, and the IF sample level is -20 dBc
nominal.
C.2.2 Troubleshooting
Downconverter operating problems can be identified by first observing the LED status indicators
on the front panel. When a fault condition is indicated, or and marginal performance tolerance
condition exists, the specific fault or faults can be identified via the FAULTS menu branch,
accessible via front panel operation. See Sect. 5.3.3 FAULTS in Chapter 5. FRONT PANEL
OPERATION for more information about viewing current or stored faults.
Converter operational status screens are available via the MONITOR menu branch. See Sect.
5.3.2 MONITOR in Chapter 5. FRONT PANEL OPERATION for more information.
C.2.3 Downconverter Faults
C.2.3.1 Prime Power
Check the dual fuses on the rear panel. The required prime power is 100 to 125 VAC, or 205 to
240 VAC @ 1 Amp. The optional DC prime power is -48 VDC.
C.2.3.2 DC Power Supply Module
15 VDC: A fault ("FT") indicates a voltage level exceeding ± 10% of the power supply voltage.
Check the output of the DC Power Supply Module. The typical current output level is 3.0 amps.
Check all connections to make sure they are secure. If the voltage exceeds ± 10%, or the power
supply module current is not approximately 3.0 amps, or the fault still exists, remove the power
supply and return it to Comtech EF Data for repair.
14 VDC: A fault ("FT") indicates a voltage level exceeding ± 10% of the power supply voltage. The
14 VDC is developed in the modules. Check the output of the 15 VDC Power Supply Module,
C–2
DT-4500-A Series Downconverters
Appendix C
Revision 1
MN-DT4500A
check for other module faults, and check all connections. If the fault still exists, remove the
converter and return it to Comtech EF Data for repair.
VCC (+5 VDC): A fault ("FT") indicates a voltage level exceeding ± 10% of the power supply
voltage. The 5 VDC is developed in the modules. Check the output of the 15 VDC Power Supply
Module, check for other module faults, and check all connections. If the fault still exists, remove
the converter and return it to Comtech EF Data for repair.
C.2.3.3 RF Converter Module
IFLO Lock Detect: A fault (“FT”) indicates that the IFLO is not locked. Check all connections to the
converter module to make sure they are secure. If the fault still exists, remove the Converter
Module and return it to Comtech EF Data for repair.
C.2.3.4 Synthesizer Sum Loop Module
Sum Loop Detect: A fault (“FT”) indicates that the sum loop is not locked. Check all connections
to the converter module to make sure they are secure. If the fault still exists, remove the Sum
Loop Module and return it to Comtech EF Data for repair.
C.2.3.5 Synthesizer Fine Step Module
Coarse Loop Detect: A fault (“FT”) indicates that the coarse loop is not locked. Check all
connections to the converter module to make sure they are secure. If the fault still exists, remove
the Fine Step Module and return it to Comtech EF Data for repair.
Fine Loop Detect: A fault (“FT”) indicates that the fine loop is not locked. Check all connections to
the converter module to make sure they are secure. If the fault still exists, remove the Fine Step
Module and return it to Comtech EF Data for repair.
C.2.3.6 Reference Oscillator Module
Reference Lock Detect: A fault ("FT") indicates that the reference oscillator detected an external
reference, but could not lock to it. Disconnect the external reference. If the fault still exists,
remove the Reference Module and return it to Comtech EF Data for repair.
C.2.3.7 Temperature Fault
Converter Over Temperature Fault: A fault ("FT") indicates that the converter is over
temperature. Turn the prime power switch off and return the converter to Comtech EF Data for
repair.
C–3
DT-4500-A Series Downconverters
Appendix C
Revision 1
MN-DT4500A
C.2.4 Converter I/O Modules
The Converter I/O Modules (IOM or TSM) are installed into the rear panel of the converter.
When installing an I/O Module into the converter rear panel, DO NOT use a
screwdriver to tighten the module mounting thumbscrews – these screws are
designed to be hand-tightened only.
C.3
Spares
Comtech EF Data recommends sparing at the RF converter level. If sparing at a lower level is
desired, please contact Comtech EF Data for the correct spares for your particular converter.
C–4
METRIC CONVERSIONS
Units of Length
Unit
Millimeter
Centimeter
Inch
Foot
Yard
Meter
Kilometer
Mile
1 millimeter
1
0.1
0.0394
0.0033
0.0011
0.001
1 x 10-6
6.214 x 10-7
1 centimeter
10
1
0.3937
0.0328
0.0109
0.01
1 x 10-5
6.214 x 10-6
1 inch
25.4
2.54
1
0.0833
0.0278
0.0254
2.54 x 10-5
1.578 x 10-5
1 foot
304.8
30.48
12
1
0.3333
0.3048
3.048 x 10-4
1.894 x 10-4
1 yard
914.4
91.44
36
3
1
0.9144
9.144 x 10-4
5.682 x 10-4
1 meter
1000
100
39.37
3.2808
1.0936
1
0.001
6.214 x 10-4
1 kilometer
1 x 106
1 x 105
3.938 x 104
3.281
1093
1000
1
0.6214
1 mile
1.609 x 106
1.609 x 105
6.336 x 104
5280
1760
1609
1.609
1
Temperature Conversions
Temperature
° Fahrenheit
° Centigrade
Formulas
Water freezes
32
0
° C = (F - 32) * 0.555
Water boils
212
100
° F = (C * 1.8) + 32
Absolute zero
-459.69
-273.16
Units of Weight
Unit
Gram
Ounce
Avoirdupois
Ounce
Troy
Pound
Avoirdupois
Pound
Troy
Kilogram
1 gram
—
0.03527
0.03215
0.002205
0.002679
0.001
1 oz. avoir.
28.35
—
0.9115
0.0625
0.07595
0.02835
1 oz. troy
31.10
1.097
—
0.06857
0.08333
0.03110
1 lb. avoir.
453.6
16.0
14.58
—
1.215
0.4536
1 lb. Troy
373.2
13.17
12.0
0.8229
—
0.3732
1 kilogram
1.0 x 103
35.27
32.15
2.205
2.679
—
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