Comtech EF Data TRP1000-OD User manual

TRP1000-OD
Troposcatter C-Band Outdoor Amplifier
Installation and Operation Manual
Part Number MN-TRP1000-OD
Revision 0
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.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
MN-TRP1000-OD
Copyright © 2017 Comtech EF Data. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: [phone]
Revision History
Rev Date Description
0 6-2017 Initial Release.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Table of Contents i MN-TRP1000-OD
TABLE OF CONTENTS
PREFACE .....................................................................................................................VII
1B1BAbout this Manual..................................................................................................................vii
Disclaimer...................................................................................................................................vii
Reporting Comments or Suggestions Concerning this Manual .................................................vii
Conventions and References...................................................................................................vii
Patents and Trademarks .............................................................................................................vii
Warnings, Cautions, and Notes .................................................................................................viii
Examples of Multi-Hazard Notices ............................................................................................viii
Recommended Standard Designations ..................................................................................... viii
Metric Conversion .....................................................................................................................viii
3B3BElectrical Safety Notice ..........................................................................................................viii
Getting Help ............................................................................................................................ix
Contacting Comtech EF Data.......................................................................................................ix
Returning a Product for Upgrade or Repair..................................................................................x
4B4BInstallation Guidelines Regarding Power Line Quality.............................................................xi
5B5BWarranty Policy .......................................................................................................................xi
12B12BLimitations of Warranty.............................................................................................................. xii
13B13BExclusive Remedies..................................................................................................................... xii
CHAPTER 1. INTRODUCTION................................................................................ 1–1
1.1 Overview................................................................................................................... 1–1
1.2 Functional Description .............................................................................................. 1–2
1.3 Features .................................................................................................................... 1–2
1.3.1 The Solid-State Advantage ........................................................................................... 1–2
1.3.2 High Efficiency.............................................................................................................. 1–2
1.3.3 Enhanced Standard Features ....................................................................................... 1–2
1.3.4 Monitor and Control via Ethernet or Serial Communications ..................................... 1–2
1.3.5 Forward, Reverse, and Input Power Monitors............................................................. 1–2
1.3.6 Complete Temperature Testing.................................................................................... 1–3
1.3.7 Data Logging Capability................................................................................................ 1–3
1.4 Theory of Operation.................................................................................................. 1–4
1.4.1 SSPA Block Diagram...................................................................................................... 1–4
1.4.2 SSPA Module ................................................................................................................ 1–5
1.4.3 Power Supply ............................................................................................................... 1–5

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Table of Contents ii MN-TRP1000-OD
1.4.4 Monitor and Control (M&C)......................................................................................... 1–5
1.4.5 Cooling System............................................................................................................. 1–5
1.4.6 Important Information on Temperature and RF Overdrive ......................................... 1–6
1.4.6.1 Overview: .......................................................................................................... 1–6
1.4.6.2 Over Temperature ............................................................................................. 1–6
1.4.6.3 Over Drive (excessive RF input level)................................................................. 1–7
1.4.6.4 Maximum Operating Points............................................................................... 1–7
1.5 Summary of Specifications ........................................................................................ 1–8
1.5.1 RF Specifications (per 013F012755 RevC dated 10/28/15)........................................... 1–8
1.5.2 Prime Power Requirements ......................................................................................... 1–9
1.6 Dimensional Envelope..............................................................................................1–10
CHAPTER 2. SYSTEM CONNECTIONS, INSTALLATION AND STARTUP............ 2–1
2.1 Overview................................................................................................................... 2–1
2.2 Interface Connectors ................................................................................................. 2–2
2.2.1 TX (RF Input) Connector ‘J1 | TX IN’ (Type N-F) ........................................................... 2–2
2.2.2 RF Output Connector ‘J2 | RF OUT’ ............................................................................. 2–3
2.2.3 AC Power Main Connector ‘J3 | AC IN’ ........................................................................ 2–3
2.2.4 Remote Communications/Discrete Control Port Connector ‘J6 | COMM 1’ ............... 2–4
2.2.5 Output Sample Port Connector ‘J9’ (Type ‘N’ Female) ................................................ 2–5
2.2.6 Ground Connector ....................................................................................................... 2–6
2.3 TRP1000-4450-OD Installation................................................................................... 2–7
2.4 Power On the Unit..................................................................................................... 2–8
CHAPTER 3. UPDATING FIRMWARE..................................................................... 3–1
3.1 Introduction .............................................................................................................. 3–1
3.2 Getting Started: Prepare for the Firmware Download ............................................... 3–2
3.3 Download and Extract the Firmware Update............................................................. 3–6
3.4 Perform the FTP Upload Procedures.......................................................................... 3–8
3.4.1 Perform the Automated Serial-Based FTP Upload Procedure (CReflash) .................... 3–8
3.4.2 Perform the Ethernet-based FTP Upload Procedure ................................................... 3–9
CHAPTER 4. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT............. 4–1
4.1 Overview................................................................................................................... 4–1

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Table of Contents iii MN-TRP1000-OD
4.2 Ethernet Management Interface Protocols................................................................ 4–1
4.3 Simple Network Management Protocol (SNMP) Interface ......................................... 4–2
4.3.1 Management Information Base (MIB) Files................................................................. 4–2
4.3.2 SNMP Community Strings............................................................................................ 4–3
4.3.3 SNMP Traps .................................................................................................................. 4–3
4.4 Telnet Interface ......................................................................................................... 4–6
4.5 Web Server (HTTP) Interface ..................................................................................... 4–6
4.5.1 User Login..................................................................................................................... 4–6
4.5.2 Web Server Interface – Operational Features.............................................................. 4–8
4.5.2.1 Navigation.......................................................................................................... 4–8
4.5.2.2 Page Sections..................................................................................................... 4–8
4.5.2.3 Execution Buttons ............................................................................................. 4–8
4.5.2.4 Drop-down Lists................................................................................................. 4–9
4.5.2.5 Text or Data Entry.............................................................................................. 4–9
4.5.3 Web Server Interface – Menu Tree.............................................................................. 4–9
4.5.4 Web Server Page Descriptions ................................................................................... 4–10
4.5.4.1 Home Pages..................................................................................................... 4–10
4.5.4.1.1 Home | Home .............................................................................................. 4–10
4.5.4.1.2 Home | Contact............................................................................................ 4–11
4.5.4.2 Admin (Administration) Pages......................................................................... 4–11
4.5.4.2.1 Admin | Access............................................................................................. 4–11
4.5.4.2.2 Admin | SNMP.............................................................................................. 4–13
4.5.4.3 Config (TRP1000-4450 Configuration) Pages .................................................. 4–14
4.5.4.3.1 Config | Amplifier......................................................................................... 4–14
4.5.4.3.2 Config | Mask ............................................................................................... 4–16
4.5.4.3.3 Config | Utility.............................................................................................. 4–17
4.5.4.4 Status Pages..................................................................................................... 4–18
4.5.4.4.1 Status | Summary......................................................................................... 4–18
4.5.4.4.2 Status | Status .............................................................................................. 4–19
4.5.4.4.3 Status | FETs ................................................................................................. 4–20
4.5.4.4.4 Status | Events ............................................................................................. 4–21
4.5.4.4.5 Status | Statistics.......................................................................................... 4–22
4.5.4.4.6 Status | MOP................................................................................................ 4–23
CHAPTER 5. SERIAL-BASED REMOTE PRODUCT MANAGEMENT................... 5–1
5.1 Overview................................................................................................................... 5–1
5.2 Key Operational Parameters...................................................................................... 5–1
5.2.1 Faults ............................................................................................................................ 5–2
5.2.2 Some Common Commands ......................................................................................... 5–2

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Table of Contents iv MN-TRP1000-OD
5.3 Remote Control Protocol and Structure..................................................................... 5–2
5.3.1 EIA-485 ......................................................................................................................... 5–3
5.3.2 EIA-232 ......................................................................................................................... 5–3
5.3.3 Basic Protocol............................................................................................................... 5–4
5.3.4 Packet Structure........................................................................................................... 5–4
5.3.4.1 Start of Packet ................................................................................................... 5–5
5.3.4.2 Target Address ................................................................................................... 5–5
5.3.4.3 Address Delimiter .............................................................................................. 5–5
5.3.4.4 Instruction Code ................................................................................................ 5–6
5.3.4.5 Instruction Code Qualifier ................................................................................. 5–6
5.3.4.6 Optional Message Arguments ........................................................................... 5–7
5.3.4.7 End of Packet ..................................................................................................... 5–8
5.3.5 End-Of-Life Commands ................................................................................................ 5–8
5.4 Remote Commands and Queries ............................................................................... 5–9
5.5 Customer Commands ...............................................................................................5–10
Acronym List........................................................................................................................... vi
LIST OF TABLES
Table 1-1. RF Specifications......................................................................................................... 1–8
Table 1-2. Prime Power Requirements........................................................................................ 1–9
Table 2-1. Connector ‘J3 | AC IN’ Pin Assignments ..................................................................... 2–3
Table 2-2. Connector ‘J6 | COMM 1’ Pin Assignments ............................................................... 2–5

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Table of Contents v MN-TRP1000-OD
LIST OF FIGURES
Figure 1-1. TRP1000-4450-OD C-Band Outdoor Amplifier ......................................................... 1–1
Figure 1-2. TRP1000-4450-OD Block Diagram ............................................................................ 1–4
Figure 1-3. TRP1000-4450-OD Dimensional Envelope ............................................................. 1–10
Figure 2-1. TRP1000-4450-OD Interface Connectors - Front...................................................... 2–1
Figure 2-2. TRP-1000-4450-OD Interface Connectors - Back...................................................... 2–2
Figure 2-3. Ferrite Beads added to AC Power Cable ................................................................... 2–4
Figure 2-4. TRP1000-4450-OD Ground Connection.................................................................... 2–6
Figure 2-5. TRP1000-4450-OD Mounting ................................................................................... 2–7
Figure 3-1. Temporary Folder Setup using Windows Desktop ................................................... 3–3
Figure 3-2. Temporary Folder Setup using Windows Explorer ................................................... 3–3
Figure 3-3. Temporary Folder Setup using ‘Run’ and ‘Browse’................................................... 3–4
Figure 3-4. Temporary Folder Setup using Windows Command Line ........................................ 3–5
Figure 3-5. Download Firmware Archive File ............................................................................. 3–7
Figure 4-1. Home | Home Page ................................................................................................ 4–10
Figure 4-2. Home | Contact Page.............................................................................................. 4–11
Figure 4-3. Admin | Access Page............................................................................................... 4–12
Figure 4-4. Admin | SNMP Page ............................................................................................... 4–13
Figure 4-5. Config | Amplifier Page........................................................................................... 4–14
Figure 4-6. Config | Utility Page................................................................................................ 4–16
Figure 4-7. Config | Utility Page................................................................................................ 4–17
Figure 4-8. Status | Summary Page .......................................................................................... 4–18
Figure 4-9. Status | Status Page................................................................................................ 4–19
Figure 4-10. Status | FETs Page................................................................................................. 4–20
Figure 4-11. Status | Events Page ............................................................................................. 4–21
Figure 4-12. Status | Statistics Page.......................................................................................... 4–22
Figure 4-13. Status | MOP Page................................................................................................ 4–23

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Table of Contents vi MN-TRP1000-OD
Acronym List
Acronym Description
EIA Electronic IndustriesAssociation
FET Field Effect Transistor
FTP File Transfer Protocol
GaN Gallium Nitrate
GUI Graphics User Interface
LED Light Emitting Diode
M&C Monitor and Control
MCP Monitor & Control Processor
MIB Management Information Base
MTBF Mean Time Between Failures
NMS Network Management System
OID Object Identifiers
RAS RetrieveAlarm Status
RCS Retrieve Configuration Status
RF Radio Frequency
RMS Retrieve Maintenance Status
SSPA Solid State Power Amplifier
VSWR Voltage Standing Wave Ratio

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Preface vii MN-TRP1000-OD
PREFACE
1B1BAbout this Manual
This manual provides installation and operation information for the Comtech EF Data
TRP1000-4450 Troposcatter C-Band Outdoor Amplifier, also referred to as TRP-1000-4450-OD,
and TRP1000-4450. This manual is an informational document intended for the persons
responsible for the operation and maintenance of the amplifier.
Disclaimer
Comtech EF Data has reviewed this manual thoroughly in order to provide an easy-to-use guide
to this 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 there are any questions regarding this 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. To submit comments, please contact the Comtech EF Data Technical Publications
department:
[e-mail]
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.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Preface viii MN-TRP1000-OD
Warnings, Cautions, and Notes
A WARNING informs you about a possible hazard that MAY CAUSE
DEATH or SERIOUS INJURY.
A CAUTION informs you about a possible hazard that MAY CAUSE
INJURY or PROPERTY DAMAGE.
A NOTE gives you important information about a task or the
equipment.
A REFERENCE directs you to additional information about a task or
the equipment.
Examples of Multi-Hazard Notices
Recommended Standard Designations
The Electronic Industries Association (EIA) designations replace Recommended Standard (RS)
Designations. References to the old designations may appear when depicting actual text (e.g.,
RS-232) as displayed on the Web Server pages or the Serial Interface for the unit. All other
references in the manual address the EIA designations.
Metric Conversion
Metric conversion information is located on the inside back cover of this manual. Comtech EF
Data furnishes this information to assist in the cross-referencing of non-Metric to Metric
conversions.
3B3BElectrical Safety Notice
Neutral Fusing – Double pole/neutral fusing is used on the prime power
supply input.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Preface ix MN-TRP1000-OD
This equipment is designed to minimize exposure of personnel to hazards. For further
information, contact Comtech EF Data, Customer Support Department. The operators and
technicians must:
Know how to work around, with, and on high voltage equipment.
Exercise every precaution to ensure personnel safety.
Exercise extreme care when working near high voltages.
Be familiar with the warnings presented in this manual.
Getting Help
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: Contact:
Technical
Support and
Service
Telephone [phone]
Email [e-mail]
Fax [phone]
Comtech EF
Data Web Site
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
Review the Warranty Policy before contacting Comtech EF Data Technical Support or
Customer Service.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Preface x MN-TRP1000-OD
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 Authorizaion
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.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Preface xi MN-TRP1000-OD
4B4BInstallation Guidelines Regarding Power Line Quality
Comtech EF Data has become familiar with the varying quality of the AC
power grid around the world. Observing the following installation guidelines
should help ensure a reliable installation.
Surge suppression: High voltage surges can cause failure of the power supply. These surges
are typically caused by circuit switching on the main AC power grid, erratic generator operation,
as well as lightning strikes. The TRP1000 does not have built in surge suppression; therefore,
regardless of power grid quality at the point of installation, Comtech EF Data recommends
installation of additional power conditioning/surge suppression at the power junction box.
Grounding: The TRP1000 provides a grounding terminal. This is provided to allow grounding of
the TRP1000 to the antenna’s grounding network. All installed components should be grounded
to a common grounding point at the antenna.
Electrical welding: If welding needs to take place at the antenna, disconnect all cables from the
TRP1000 except for the ground wire. Cap all RF connections with terminations. This will prevent
damage to the input/output circuitry of the amplifier.
Lightning: Lightning strikes on or around the antenna will generate extremely high voltages on
all cables connected to the TRP1000. Depending on the severity of the strike, the external surge
suppression may protect the TRP1000’s power supply. However, if the installation will be in an
area with a high probability of lightning strikes, Comtech EF Data recommends the installation of
surge suppression on the RF and IF cables. One source of these suppressors is PolyPhaser
(2Hwww.polyphaser.com).
5B5BWarranty 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.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Preface xii MN-TRP1000-OD
12B12BLimitations 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.
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.
13B13BExclusive 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.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Introduction 1–1 MN-TRP1000-OD
Chapter 1. INTRODUCTION
1.1 Overview
Before operation, read Section 1.4.6 “Important Information on
Temperature and RF Overdrive.”
The compact, thermally efficient design and beneficial features of the Comtech EF Data
TRP1000-4450-OD Troposcatter C-Band Outdoor Amplifier (Figure 1-1) – referred to throughout
this manual as the TRP1000-4450, SSPA, TRP-1000-OD, or amplifier – are the result of Comtech
EF Data’s extensive experience in the design of outdoor RF amplifiers and transceivers.
Figure 1-1. TRP1000-4450-OD C-Band Outdoor Amplifier

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Introduction 1–2 MN-TRP1000-OD
1.2 Functional Description
Each TRP1000-4450 consists of a Comtech EF Data Solid-State Power Amplifier (SSPA)
module, a Monitor/Control Processor (MCP), Forward, Reflected, and Input RF Power monitoring,
a power supply, and thermal management system with heat sinks and cooling fans. The amplifier
features a proprietary Comtech EF Data low-loss combining technique and MCP-based
temperature-versus-gain compensation circuitry.
1.3 Features
1.3.1 The Solid-State Advantage
The TRP1000-4450 is constructed entirely with solid-state devices, including the latest, high
reliability, high power density gallium nitride (GaN) transitors. SSPAs are known to exhibit much
longer lifetimes or mean time between failures (MTBF) than their tube based counterparts,
eliminating the frequent and expensive need for tube replacement and the associated out-of-
service operation loss.
1.3.2 High Efficiency
The advances in GaN technogoly utilized in the active transistors mentioned above also allow for
the best possible efficiency at these high power levels, reducing operating costs. Also, as the
user lowers output power according to operation needs, dc power consumption is also reduced
accordingly.
1.3.3 Enhanced Standard Features
The TRP1000-4450 comes equipped with useful features that other manufacturers offer only as
options. Included are temperature compensation, output sample port, forward, reverse and power
monitors, power factor corrected supply, and full remote monitor and control (M&C) capabilities
(including Ethernet).
1.3.4 Monitor and Control via Ethernet or Serial Communications
A user can monitor and control all critical parameters of the SSPA by multiple methods. A user
can use the Ethernet and the built in graphics user interface (GUI) interface, via serial
communications commands and responses, or manually by the front panel light emitting diode
(LED) interface menu and keypad.
1.3.5 Forward, Reverse, and Input Power Monitors
The TRP1000-4450 comes equipped with an output sample port, along with forward, reverse, and
input power monitors. The unit will shut itself off in case of excessive reflected power.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Introduction 1–3 MN-TRP1000-OD
1.3.6 Complete Temperature Testing
While others may imply temperature compliance, each TRP1000-4450 is fully tested over the
specified operating temperature range. Corresponding test data is supplied, which ensures a
reliable unit. The customer can have confidence and the knowledge that each unit has been
tested and has passed criticial specifications at the operating temperature extremes.
1.3.7 Data Logging Capability
The TRP1000-4450’s built-in data logging capability greatly enhances system maintainability. By
recording critical operational parameters such as temperature, output power, mute status, etc. at
time stamped intervals, the user can quickly gather intelligence about not only the unit itself, but
also the unit’s operational environment.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Introduction 1–4 MN-TRP1000-OD
1.4 Theory of Operation
As shown in the block diagram of Figure 1-2, the major components of the TRP1000-4450 SSPA
are:
•The SSPA Module
•The Power Factor Corrected Power Supply
•Monitor & Control (M&C)
•The Cooling System
1.4.1 SSPA Block Diagram
O
C
I
O
C
I
J2
TX OUT
J9
OUTPUT
SAMPLE
J1
TX IN
RF MODULE 212 2
3
J6
COMM 1
J3
AC IN
PL-0021952
CA-0020988
J2
J6 CA-00231332
TROPO 1kW OUTDOOR BLOCK DIAGRAM
(013F012755-1)
O
C
I
CA-0021324
O
C
I
+24 +40
+10Gnd
Sig
+24 +40
+10Gnd
Sig
Inp Pwr
Fwd Pwr
Rev
Pwr
Monitor & Control
PS2 PS1
40V
10V
40V
+24V
EMI Filter
Status
LEDs
PS
Fans
RF Fans
Outside
Temp Sensor Exhaust
Temp Sensor
PS MODULE
PL-0022293
Figure 1-2. TRP1000-4450-OD Block Diagram

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Introduction 1–5 MN-TRP1000-OD
1.4.2 SSPA Module
The amplifier module performs the core function of the unit. An isolator is at the RF input to
ensure good voltage standing wave ratio (VSWR). The RF signal then passes through the input
power monitor and on to an electronically controlled attenuator that adjusts the overall attenuation
according to the user input. This attenuator is automatically controlled via a look-up table to
maintain the amplifier gain at a constant level over temperature variations.
The RF signal is then amplified by a multi-stage design that utilizes proprietary low-load
combining techniques to meet the rated power requirements. The output circuitry contains a
coupler to provide a sampled signal for monitoring purposes. A forward power detector circuit
also is included and the reading can be accessed via remote communication. A high power
circulator and load is located at the output to provide good VSWR and protection from external
mismatch. A reverse power detector will shut down and protect the unit in case of excessive
reflected power. A low pass filter provides harmonic rejection.
1.4.3 Power Supply
The SSPA features a power supply that is power factor corrected. It supplies several voltages
necessary for the unit to operate:
The 10V and 40V power supplies output states are controlled by circuitry within the RF module. If
the RF module does not have the –5.8V supply for any reason, it will not allow the 10/40V power
supplies to turn on. This protects the power transistors within the RF module from failure due to
improper power supply sequencing.
The +24V output powers the cooling fans and the M&C circuitry.
1.4.4 Monitor and Control (M&C)
The TRP1000-4450 includes a microprocessor-based system that provides monitoring and
control of the essential parameters of the unit. The user interfaces with the unit through the M&C
system via the remote control/discrete communications port. The unit is capable of EIA-232, EIA-
485, or Ethernet remote communication. A discrete mute control and relay status output is also
available.
The M&C system monitors and controls the fan speeds, unit temperature, all power supply
voltages, power transistor currents, output power, etc. Should a critical monitored parameter fail,
the unit will mute the RF signal and report a fault. The details of the fault can be accessed via
remote communication.
1.4.5 Cooling System
The SSPA contains a robust and proprietary heat sink and thermal design to maintain a low
operating temperature. There are three larger fans dedicated to the radio frequency (RF) heat
sink, and three smaller fans dedicated to keeping the power supply cool. Each of the fans are
monitored and speed controlled by the M&C board. The fans draw cool outside air in across the
power supply and specialized RF heat sink.
The amplifier module temperature is monitored and, if for any reason the amplifier temperature
exceeds a safe preset limit, the amplifier module supply is shut down to protect the unit from
thermal failure.

TRP1000-4450 Troposcatter C-Band Outdoor Amplifier
Revision 0
Introduction 1–6 MN-TRP1000-OD
The M&C also monitors a temperature sensor placed in the outside airstream, to give the user an
indication of the “Outside” or ambient temperature the amplifier is operating in. An alarm is
presented to the user if the outside temperature is 3ºC more than the upper temperarature rating.
The unit will shut down to protect itself if it senses the outside temperature at 6ºC above the rated
upper limit.
The user should install the unit in such a way as to not impede adequate airflow (see Section 2
on Installation) and always operate the unit within the rated temperature specification. The heat
sinks should be regularly cleaned as well to ensure adequate airflow and cooling (see Section 5
on Maintenance).
1.4.6 Important Information on Temperature and RF Overdrive
Read and understand this important section to ensure long time
amplifier reliability.
1.4.6.1 Overview:
The TRP1000-4450 has firmware intended to help the user be more aware of potential over
temperature and over drive conditions that could degrade the reliability of the amplifier.
Furthermore, the user will can view recorded maximum and minimum values of important
parameters as they have occurred over the operating history of the unit. These updates are
explained below.
1.4.6.2 Over Temperature
As stated in the specifications, the amplifier is rated to operate up to ambient temperatures of
60ºC. Operating temperatures beyond this rating may degrade the performance and life of the
amplifier. The unit has an internal sensor that monitors the temperature of the airflow across the
cooling fans, and is very close to the actual ambient or outside temperature. This temperature
can be monitored on the Status webpage, where it is labeled Outside Temperature. It is also
reported via the serial RMS command, and has the label of OTEMP. This temperature should be
consistent with the expected ambient temperature in which the unit resides. If it is not, then the
user should try and ensure that there are no obstructions blocking the cool air inlet or recirculating
the hot air exhaust of the unit back into the inlet, that there is adequate clearance around the cool
air inlet and exhaust areas, that all fans are working properly, etc.
If this Outside Temperature sensor is ≥ 63ºC, or other internally monitored temperatures exceed
their threshold (such as the amplifier heat sink temperature, ATEMP>95ºC), an alarm or fault will
be declared. The unit will not shut down but the condition causing the elevated temperature
should be promptly remedied. If temperatures continue to rise (Outside Temp ≥66ºC or ATEMP
≥66ºC), the unit will declare an Over Temperature Shutdown fault and will turn off the power
supplies to the critical RF transistors for protection purposes. (The Amplifier/Outside Temperature
Alarm has a hysteresis of 5ºC, while the Over Temperature Shutdown fault has a hysteresis of
10ºC).