MiTEC WTX-14014539-70-ES Series User manual

WTX-14014539/40/41-70-ES-xx
8 to 12 Watt, 70 dB Gain Ku-Band ODU
Operation and Maintenance Manual

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Mitec telecom inc.
Designers and manufacturers of telecom and wireless products
9000 Trans Canada,
Pointe-Claire, Quebec, Canada
H9R 5Z8
OPERATION AND MAINTENANCE MANUAL Preliminary Released
REVISION RECORD
Revision ECN # Description Date Approved
0 Engineering Release. 22 Jul 05
1 Revision to add extended frequency band option 12 Sept 06
2 Outline Drawing in Appendix A for extended band added 01 Nov 06
CM Approval TITLE:
WTX-14014539_40_41-70-ES-xx
High Power Transmitter Module
This document contains information proprietary to Mitec telecom inc., or its affiliates, or to a third party to which Mitec telecom inc. may have a legal obligation to protect
such information from unauthorized disclosure, use, or duplication. Any disclosure, use, or duplication of this document or of any of the information contained herein is
expressly prohibited except as Mitec telecom inc. may otherwise agree in writing.
Designer: Marina Lissianskaia Date: 22 Jul 05 REV 2
Technical Writer: Colleen Strunga Date: 22 Jul 05
DOCUMENT NO.
20447-001MA
PAGE 1 OF 36

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mitec Preface
Rev 2 P-1
Preface
Scope
This document covers the installation, operation, and maintenance of the WTX-14014539_40_41-70-
ES-xx High Power Transmitter Modules. It contains information intended for engineers, technicians
and operators working with the transmitter module.
To make inquiries, or to report errors of fact or omission in this document, please contact Mitec
telecom inc. at [phone].
IMPORTANT
Important information concerning the operation and care of this product, as well as safety of
authorized operators is highlighted throughout this document by one of the following labels:
NOTE
Indicates a reminder, a special consideration, or additional
information that is important to know.
CAUTION!
Identifies situations that have the potential to cause equipment
damage.
WARNING!!
Identifies hazardous situations that have the potential to cause
equipment damage as well as serious personal injury.

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mitec Table of Contents
Rev 2
i
Table of Contents
1INTRODUCTION ........................................................................... 1
1.1 Receiving and Inspection .........................................................................................2
1.1.1 Equipment Damage or Loss .............................................................................2
1.1.2 Return of Equipment ........................................................................................2
1.2 Preparing for Installation ........................................................................................3
1.2.1 Safety Precautions ............................................................................................3
2INSTALLATION & OVERVIEW .................................................. 5
2.1 General Description .................................................................................................5
2.2 Specifications ............................................................................................................5
2.2.1 Controls, Indicators and Connectors ................................................................7
2.2.2 General Considerations ....................................................................................7
2.3 Basic Mechanical Characteristics ...........................................................................7
2.3.1 External View of the Transmitter Module........................................................7
2.3.2 Connections and Mounting Hardware..............................................................8
2.4 Assembly and Installation........................................................................................8
2.4.1 Lifting the Transmitter Module into Position and Temporary Attachment .....8
2.4.2 Securing the Transmitter Module.....................................................................9
2.5 Functional Overview ................................................................................................9
2.5.1 General .............................................................................................................9
2.5.2 IF/RF Conversion and Amplification.............................................................10
2.5.3 Protection and Control....................................................................................10
2.5.4 Internal Power Distribution Reference...........................................................11
3OPERATION ............................................................................... 13
3.1 Procedure ................................................................................................................13
3.1.1.1 Interface ............................................................................................................ 14
4MAINTENANCE .......................................................................... 15
4.1 Preventive Maintenance.........................................................................................15

Table of Contents mitec
ii Rev 2
4.1.1 Procedure........................................................................................................15
4.1.2 Transmitter Module Cooling System Preventive Maintenance......................15
4.1.3 Performance Check.........................................................................................16
4.1.4 Troubleshooting..............................................................................................17
4.1.5 Out-of Warranty Repair..................................................................................17
APPENDIX A ........................................................................................
Drawings & Schematic Diagrams ............................................................................ A-1
APPENDIX B ........................................................................................
Bench Test Record......................................................................................................B-1
APPENDIX C ........................................................................................
Serial Protocol Documentation ................................................................................ C-1
APPENDIX D ........................................................................................
Spare Parts ................................................................................................................. D-1
List of Tables
Table 1 –Specifications........................................................................................................5
Table 2 - Recommended Corrective Actions.....................................................................17
List of Figures
Figure 1 – Recommended Distance for Mounting on the Hub............................................9
Figure 2 - System Block Diagram .....................................................................................10
Figure 3 – Cooling Fan Replacement ................................................................................16
Figure 4 – Outline Drawing ............................................................................................ A-3

mitec Introduction
Rev 2 Page 1
1 Introduction
The WTX-14014539_40_41-70-ES-xx High Power Transmitter Modules are highly reliable, high
quality, cost efficient stand-alone transmitter systems. The application for these modules is Ku-
Band VSAT communication in an outdoor environment. This line of superior products,
engineered using state of the art technology, is characterized by unparalleled durability and
dependability.

Introduction mitec
Page 2Rev 2
1.1 Receiving and Inspection
The transmitter module is designed to function outdoors and will arrive in a standard shipping
container. Immediately upon receipt of the transmitter module, check the Bill of Lading against
the actual equipment you have received. Inspect the shipping containers exteriors for visible
damage incurred during shipping.
CAUTION!
Handle the transmitter module with extreme care. Excessive shock
may damage transmitter module’s delicate internal components.
NOTE
Before unpacking the shipping containers, move them near to the
site where the system will be mounted. Ensure that the
containers are oriented correctly in accordance with the “This
Side UP ”labels. Carefully remove the transmitter module and
packing material from the shipping containers.
Using the supplied packing list, verify that all items have been received and undamaged during
shipment. Verify that all items are complete. If there are any omissions or evidence of improper
packaging, please notify Mitec telecom inc. immediately.
1.1.1 Equipment Damage or Loss
Mitec Telecom Inc. is not responsible for damage or loss of equipment during transit. For
further information, contact the responsible transport carrier.
When declaring equipment as damaged during transit, preserve the original shipping cartons to
facilitate inspection reporting.
1.1.2 Return of Equipment
When returning equipment to Mitec for repair or replacement:
1. Identify, in writing, the condition of the equipment,
2. Refer to the sales order, Purchase Order and the date the equipment was received.
Notify Mitec Sales Administration Department of the equipment condition and obtain a Return
Material Authorization (RMA) number and shipping instructions. Mitec will pay for the cost of
shipping the product to the customer after the repairs are completed.

mitec Introduction
Rev 2 Page 3
NOTE
Do not return any equipment without an RMA number. This is
important for prompt, efficient handling of the returned
equipment and of the associated complaint.
1.2 Preparing for Installation
Before attempting to install or use the transmitter module, we recommend that you first
familiarize yourself with the product by reading through this manual. Understanding the
operation of the system will reduce the possibility of incorrect installation, thereby causing
damage or injury to yourself or others.
The transmitter module must be installed in accordance with the
conditions and recommendations contained in the following
sections.
When you are ready to begin your installation, use the information in Chapter 2 (Installation) as a
guide for making all the required electrical connections.
1.2.1 Safety Precautions
Carelessness or mishandling of the transmitter module may damage the unit causing serious
injury to yourself or others. Please adhere to the following:
WARNING!!
This unit is equipped with an AC power cord and plug. Do not
tamper with, or attempt to reconfigure, the cord or plug supplied
with the unit, as this can:
♦ result in personal injury
♦ void the warranty
♦ cause damage to the units or related equipment.

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mitec Installation & Overview
Rev 2 Page 5
2 Installation & Overview
2.1 General Description
This section describes the installation and theory of operation of the transmitter module.
The modules are stand-alone Transmitter Systems powered from 24 VDC and 110/220 VAC
power sources. They will amplify an input signal from an L-Band RF source up to power levels
of 8, 10, or 12 Watts CW in Ku-Band as shown below.
Model Power Level
WTX-14014539-70-ES-xx 8 Watts
WTX-14014540-70-ES-xx 10 Watts
WTX-14014541-70-ES-xx 12 Watts
The Transmitter consists of a low power block up-converter (BUC) and a high power amplifier
(Booster.)
The Booster has control and protection functions and consists of these major sub-systems: the RF
Amplifier, and power supply and a cooling system. The amplifier section contains all the
necessary DC power conditioning circuitry for bias and sequencing of the RF amplifier devices as
well as a RS-485 monitor and control interface, depending on the model option.
The module can be used as a stand-alone unit or in a redundant configuration.
2.2 Specifications
Table 1 summarizes the specifications of the WTX-14014539_40_41-70-ES-xx High Power
Transmitter Modules, where XX represents the output power, and YY represents the
configuration and ZZZ represents the frequency band. For mechanical specifications, refer to the
outline drawing, Figure 4 in Appendix A.
Table 1 –Specifications
RF Performance
Output Frequency
WTX-140145XX-70-ES-YY
WTX-137145XX-70-ES-YY
14.0 to 14.5 GHz
13.75 to 14.5 GHz
IF Frequency
WTX-140145XX-70-ES-YY
WTX-137145XX-70-ES-YY
950 to 1450 MHz
950 to 1700 MHz
Reference Frequency 10 MHz External Reference;
(0 ±5) dBm Input Power Level
Small Signal Gain 69 dB, min over temperature

Installation & Overview mitec
Page 6 Rev 2
RF Performance
Gain Flatness (small signal)
at 10 dB back-off
±2.5 dB, typ. (±3.5 dB max) over full band
±0.3 dB, p-p, max. over any 40 MHz
Gain Stability with power (expansion) 0.5 dB, max.
Output Power
WTX-ZZZ14539-70-ES-YY
WTX-ZZZ14540-70-ES-YY
WTX-ZZZ14541-70-ES-YY
39.0 dBm (8 W), min at P1dB
40.0 dBm (10 W), min at P1dB
41.0 dBm (12 W), min at P1dB
Saturated Output Power
WTX-ZZZ14539-70-ES-YY
WTX-ZZZ14540-70-ES-YY
WTX-ZZZ14541-70-ES-YY
40.0 dBm (10 W), typ. at PSAT
41.0 dBm (12 W), typ. at PSAT
42.0 dBm (16 W), typ. at PSAT
3rd Order Intermodulation (IMD-3) -26 dBc typ., two equal signals at 6 dB back off
from P1dB rated total; 5 MHz separation
Phase Noise -60 dBc/Hz, max. @300 Hz offset of the carrier
-70 dBc/Hz, max. @ 1 kHz offset of the carrier
-80 dBc/Hz, max. @ 10 kHz offset of the carrier
-90 dBc/Hz, max. @ 100 kHz offset of the carrier
-100 dBc/Hz, max. @ 1 MHz offset of the carrier
Integrated Phase Noise Error 2.2 degrees, max. form 300 Hz to 1 MHz SSB
Phase Perturbation 4 degrees, max for full (5ms) pulse:
3 degrees p-p max. from the starting 30 usec
Source & Load VSWR 1.5:1 max (operational), infinite at any angle
without damage, unconditionally stable
Input Return Loss (cold) -14 dB typ.
Output Return Loss -17 dB max.
Spurious In-band -50 dBc, max @ P1dB
Spurious Out of Band -60 dBc, max @ P1dB
Harmonics -55 dBc, typ. @ P1dB
RF Monitor Port (optional) N/A
Power Consumption 120 - 150 W typical
Power Supply
Input 110/220 VAC, 300W min.
typical 48VDC optional
Output N/A
Cooling Forced Air
Efficiency 85% nominal
Design Technology High frequency switching modules
Mechanical Specifications
Package Outdoor, weather resistant
Size (overall dimensions 13.5”x8.25”x10”
Weight 6 Kg (13.2 lb) typical
Cooling Forced Air
Exterior Surface Finish Painted off-white
Hardware Stainless Steel

mitec Installation & Overview
Rev 2 Page 7
RF Performance
O-ring Silicone
Markings Labels permanent and legible
1 Mitec Part No & Revision Level
2 Serial No.
3 IF Input
4 RF Output
5 M&C, if applicable
6 AC Input
Environmental Operational Storage
Temperature -400to 550C -500C to 850C
Humidity 5% to 95% at -400C 5% to 95% at 650C
Altitude 10,000 ft AMSL 40,000 ft AMSL
Shock and Vibration Normal transport and handling
Drop N/A 1m in shipping container
Reliability
MTBF (mean time between failures) 118,000 hours (fan reliability data is not included.
Fan must be replaced once every 2 years
minimum.
2.2.1 Controls, Indicators and Connectors
The controls and indicators pertaining to this specific model, as well as a table listing the
connector pin-outs, are described in the bench test record (BTR), found in Appendix B.
2.2.2 General Considerations
The module shall meet all specifications over full bandwidth and under all environmental
conditions when terminated with a load of VSWR at 1.5:1 unless otherwise specified. All RF
specifications shall be met within five minutes after applying DC power, except gain flatness,
which shall be met after a warm-up period of ten minutes. During the warm-up period, the
module shall not exhibit any alarm or require an RF mute input signal to reset any alarm/fault
latches.
2.3 Basic Mechanical Characteristics
2.3.1 External View of the Transmitter Module
The physical external dimensions of the transmitter module are shown in Figure 4 and Table 1.
All inputs and outputs are shown in Figure 4.

Installation & Overview mitec
Page 8 Rev 2
2.3.2 Connections and Mounting Hardware
The IF input connection requires a coaxial cable with an N-type male connector for the IF Input.
The RF output requires a waveguide with a WR75 flat flange. An O-ring shall be used to seal the
waveguide connection. There is also a cylindrical connector on the RF Input side of the RF
amplifier for AC power. The pin assignments for the connectors are shown in section 3.
Four brackets each with #1/4 hardware fasten the SSPA and the BUC onto the mounting frame
for adequate support. Fasten the frame with the BUC and SSPA on it to the beam using two U
bolts and corresponding hardware, using the adjustable nuts to adjust the level.
See Figure 4 in Appendix A. Four cap screws (#6-32) and their respective lock washers fasten
the antenna waveguide feeder on to the transmitter waveguide output flange. The mating
connectors, hardware and O-ring are in the shipping container with the transmitter.
2.4 Assembly and Installation
Use the information in this section as a guide to assemble and install the transmitter module. The
specified humidity is up to 100% during operation. However, installation should be carried out in
dry conditions, free of salt spray or excessive humidity. This will eliminate the possibility of
moisture and other foreign substances from entering the output waveguide flange.
CAUTION!
Only authorized technical personnel should perform the
Installation and proper electrical hookups of the transmitter
module.
2.4.1 Lifting the Transmitter Module into Position and Temporary Attachment
The transmitter module weighs approximately 6 kg (13.2 lb), which may be handled by one
person. Remove all plastic caps from the connectors and output waveguide flange. Lift the
transmitter module. The transmitter module is now ready for permanent attachment.
The transmitter is designed to operate in an outdoor environment and is waterproof when
mounted in the correct orientation as per Figure 1 and the orientation labels placed on the RF
amplifier shroud.
The transmitter contains high flow-rate fans (300 CFM) for cooling the RF amplifier module.
These fans function continuously during the transmitter operation. To provide a sufficient
airflow, the transmitter should be mounted with a minimum clearance of 3 inches on all four sides
and the bottom. Refer to Figure 1. Adequate cooling for the transmitter will provide years of top
performance.

mitec Installation & Overview
Rev 2 Page 9
2.4.2 Securing the Transmitter Module
Secure the transmitter module on to the mounting frame using the hardware described in section
2.3.2. Align the transmitter output waveguide flange with the mating flange of the antenna feeder
waveguide. Using the O-ring and hardware provided, connect the antenna feeder waveguide.
Torque the flange screws to 16 inch-pounds (1.8 N-m). Attach the proper cables for waveguide
for IF input, AC power and M&C to the corresponding connectors of the transmitter module.
Refer to Figure 4 in Appendix A.
NOTE
The cylindrical connectors are labeled clearly and have different
pin layouts. Refer to Figure 4. It is impossible to incorrectly
install the mating connectors.
Figure 1 – Recommended Distance for Mounting on the Hub
2.5 Functional Overview
2.5.1 General
This section describes the transmitter module functions in detail. The functional overview
explains the RF amplification, monitor & control and power distribution.
3 INCH MIN. CLEARANCE ALL AROUND
POWER
INPUT
RF
INPUT
RF
OUTPUT

Installation & Overview mitec
Page 10 Rev 2
Figure 2 block diagram illustrates the transmitter module.
Figure 2 - System Block Diagram
2.5.2 IF/RF Conversion and Amplification
The IF Input signal with a 10MHz reference, 0-/+5dBm and 24VDC, 1.5A nominal enters the
BUC by a coaxial cable, converted to Ku-Band by the BUC and goes through an isolator, which
provides a good VSWR at the input. Under normal operation, the RF amplifier will amplify the
RF Input signal level up to a power level of 39 to 41 dBm (8 to 12 Watts CW) P1dB minimum.
For small signal gain, the transmitter module is capable of providing a gain of approximately 70
dB.
To achieve the rated output power, GaAs transistors, as well as other microwave components
within the RF Amplifier, provide the necessary gain and low insertion loss. The amplified signal
is transmitted through the output waveguide section to a satellite up-link system.
2.5.3 Protection and Control
The protection and control circuitry are contained within the RF Amplifier
A control section contains all o the necessary DC power conditioning circuitry for providing the
proper bias and sequencing of the RF amplifier devices. The protection function within the
control section includes over temperature shut down.
The SSPA has a temperature sensor on the hot spot of the unit. Itf the temperature of the SSPA
hot spot exceeds 850C., the RF amplifier module will shut down until the condition is corrected.
12 VDC
8 - 12 A
max
BUC &
SSPA
Power Supply
Cooling System
(100 CFM min Fan)
IF In
L-Band &
10MHz reference
(0 +/- 5 dBm)
with 24VDC
RF Out
39 - 41dBm min @ P1dB
AC Power In
90-265 VAC
110 - 150 W
max
12 VDC
0.5 A max

mitec Installation & Overview
Rev 2 Page 11
2.5.4 Internal Power Distribution Reference
The transmitter module operates from power source of 24 VAC for the BUC and 90 VAC to 265
VAC, 47 to 63 Hz for the SSPA. It will consume approximately 120 to 150 watts.
The power supply converts the incoming AC voltage into two separate DC voltages. The DC
voltages are regulated to ensure isolation and stability. The module provides:
 12 VDC, 8 to 12A maximum to the RF amplifier circuits
 12 VDC, 0.5A maximum to the cooling system fan. Refer to Figure 2
The power supply is capable of 85% efficiency.
If the voltage exceeds its maximum value, the power conditioner board will shut down the SSPA
until the over voltage condition is corrected. Inrush current will not trip this protection circuit.

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