Pulsar LPA50 User guide

LPA50/LPA100
50/100W LINEAR POWER AMPLIFIER
System Manual
CA44–VER03
(Replaces CA44-VER02)
Technologies, Inc.
4050 NW 121st Avenue
Coral Springs, FL 33065
1–800–785–7274
www.pulsartech.com
Printed June 2001

Copyright © 2001 Pulsar Technologies, Inc.

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LPA50/
LPA100
System Manual
Table
of
Contents
2

ii June 2001
Technologies, Inc.
Trademarks
All terms mentioned in this book that are known to be trademarks or service marks are listed below.
In addition, terms suspected of being trademarks or service marks have been appropriately capital-
ized. Pulsar Technologies, Inc. cannot attest to the accuracy of this information. Use of a term in this
book should not be regarded as affecting the validity of any trademark or service mark.
IBM and PC are registered trademarks of the International Business Machines Corporation.
Changes Since the Last Publication
The previous publication (CA44-VER02) was published in May 1998. This manual has been totally reformatted in June 2001.
Technical information regarding the LPA50/LPA100 is generally the same as in the last publication (CA44-VER02). Change bars,
like the ones in the left margin on this page, are next to important new information that may affect the operation of the
LPA50/LPA100. Note also that in some cases text and graphics may have flowed to a different page than in the previous publi-
cation due to formatting or other changes.
Chapter Number & Title Publication Date Pages with Changes
Front Section June 2001 Entire chapter reformatted
1. Product Description June 2001 Entire chapter reformatted
2. Applications and Ordering Information June 2001 Entire chapter reformatted
3. Installation June 2001 Entire chapter reformatted
4. Test Equipment June 2001 Entire chapter reformatted
5. Initial Adjustment June 2001 Entire chapter reformatted
6. Maintenance June 2001 Entire chapter reformatted
7. Power Supply Module June 2001 Entire chapter reformatted
8. 12.5W PA Module June 2001 Entire chapter reformatted
9. 50W Combiner Module June 2001 Entire chapter reformatted
10. 100W Combiner Module June 2001 Entire chapter reformatted

June 2001
iii
Linear Power Amplifier LPA50 / LPA100
e recommend that you become acquainted with the information in this manual before ener-
gizing your LPA50 or LPA100. Failure to do so may result in injury to personnel or damage to
the equipment, and may affect the equipment warranty. If you mount the LPA chassis in a
cabinet, it must be bolted to the floor or otherwise secured before you swing out the equipment,
to prevent the installation from tipping over.
You should neither remove nor insert printed circuit modules while the unit is energized. Failure
to observe this precaution can cause component damage.
All integrated circuits used on the modules are sensitive to and can be damaged by the discharge
of static electricity. You should observe electrostatic discharge precautions when handling
modules or individual components.
PULSAR does not assume liability arising out of the application or use of any product or circuit
described herein. PULSAR reserves the right to make changes to any products herein to improve
reliability, function or design. Specifications and information herein are subject to change
without notice. All possible contingencies which may arise during installation, operation, or
maintenance, and all details and variations of this equipment do not purport to be covered by
these instructions. If you desire further information regarding a particular installation,
operation, or maintenance of equipment, please contact your local Pulsar Technologies, Inc.
representative.
Copyright ©
By Pulsar Technologies, Inc.
ALL RIGHTS RESERVED
PULSAR does not convey any license under its patent rights nor the rights of others.
!IMPORTANT
W

Preface
Scope
This manual describes the functions and features of the LPA50 and LPA100 linear power amplifiers.
It is intended primarily for use by engineers and technicians involved in the installation, alignment,
operation, and maintenance of the LPA50/LPA100.
Equipment Identification
The LPA50/LPA100 equipment is identified by the Catalog Number on the chassis nameplate. You can
decode the Catalog Number using Tables 2-1 and 2-2 (see Chapter 2).
Production Changes
When engineering and production changes are made to the LPA50/LPA100 equipment, a revision notation
(Sub number) is reflected on the style number, related schematic diagram, and associated parts informa-
tion. A summary of all Sub numbers for the particular release is shown on the following page.
Warranty
Our standard warranty extends for either 18 months after the equipment is in-service or 24 months after
shipment, whichever comes first. For all repaired modules or advance replacements, the standard warranty
is 90 days or the remaining warranty time, whichever is longer. Damage clearly caused by improper appli-
cation, repair, or handling of the equipment will void the warranty.
Equipment Return & Repair Procedure
To return equipment for repair or replacement:
1. Call your PULSAR representative at 1–800–785–7274.
2. Request an RMA number for proper authorization and credit.
3. Carefully pack the equipment you are returning.
Repair work is done most satisfactorily at the factory. When returning any equipment, pack it in
the original shipping containers if possible. Be sure to use anti-static material when packing the
equipment. Any damage due to improperly packed items will be charged to the customer, even
when under warranty.
Pulsar Technologies, Inc. also makes available interchangeable parts to customers who are
equipped to do repair work. When ordering parts (components, modules, etc.), always give the
complete PULSAR style number(s).
4. Make sure you include your return address and the RMA number on the package.
5. Ship the package(s) to:
Pulsar Technologies, Inc.
Communications Division
4050 NW 121st Avenue
Coral Springs, FL 33065
iv June 2001
Technologies, Inc.

June 2001
v
Linear Power Amplifier LPA50 / LPA100
Document Overview
The LPA50/LPA100 circuitry is divided into three (3) modules. The power supply and power amplifier
modules are the same modules used in the TC-10B/TCF-10B systems. The combiner modules were
specially designed for the LPA50/LPA100 system.
Chapter 1 provides the Product Description. Chapter 2 presents applications and related catalog numbers
for ordering purposes. The LPA50/LPA100 installation is described in Chapter 3, with maintenance proce-
dures in Chapter 6. Chapters 4, 5, and 6 identify test equipment, initial adjustments, and maintenance
procedures, respectively. Module circuit descriptions and troubleshooting procedures are in Chapters 7
thru 10.
Contents of LPA50 and LPA100
The LPA50 and LPA100 include the modules and parts listed below. The style number and latest revision
level for each module and part is shown, as is the the quantity included with each set. (For ordering infor-
mation, please see Table 2-1 in Chapter 2.)
Sub Number Quantity per
Module/Part Style # (Revision Level) LPA50 LPA100
Power Supply 1617C38G01, 2, or 3 2 2 4
12.5W Power Amplifier 1606C33G01 21 4 8
50W Power Combiner CA20-CMBMN-001 02 1 2
100W Power Combiner CA20-CMBMN-002 02 0 1
19” Chassis 1353D63G04 n/a 1 2
Chassis Front Cover 1606C49G01 n/a 1 2
Interconnecting Cables n/a 0 1 lot

FIGURES
Figure No. Page No.
1-1 Front View of the LPA50/LPA100 Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1-2 LPA50 Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
1-3 LPA100 Functional Diagram (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
1-4 LPA100 Functional Diagram (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
2-1 TC-10B with LPA RF connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2-2 TC-10B (Analog Receiver) or TCF-10B RF connections . . . . . . . . . . . . . . . . . . .2-1
3-1 LPA50/LPA100 chassis dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
3-2 LPA50/LPA100 chassis footprint dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3-3 LPA50 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3-4 LPA100 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
4-1 Extender Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
5-1 LPA Front panels & Test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
5-2 LPA50 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
5-3 LPA100 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
7-1 Power supply front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7-2 Power supply component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7-3 Power supply schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
8-1 12.5W PA front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8-2 12.5W PA component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
8-3 12.5W PA schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
9-1 50W Combiner Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2
9-2 50W Combiner Module component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-3
9-3 50W Combiner Module schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4
10-1 100W Combiner Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
10-2 50W Combiner Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2
10-3 100W Combiner Module component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-3
10-4 100W Combiner Module schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-4
vi June 2001
Technologies, Inc.

TABLES
Table No. Page No.
1-1 LPA50 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
1-2 LPA100 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
1-3 Environmental requirements specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
1-4 Altitude Dielectric Strength De-Rating for Air Insulation . . . . . . . . . . . . . . . . . . .1-8
1-5 Altitude Correction For Maximum Temperature Of Cooling Air (ANS C93.5) . .1-8
2-1 LPA50/LPA100 Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2-2 LPA50/LPA100 Module and Chassis Style Numbers . . . . . . . . . . . . . . . . . . . . . .2-3
4-1 LPA50/LPA100 Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
7-1 1617C38 Styles and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
8-1 1606C33 Styles and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
June 2001
vii
Linear Power Amplifier LPA50 / LPA100

Technologies, Inc.

Copyright © 2001 Pulsar Technologies, Inc.
1
1.1 General Description
The PULSAR Linear Power Amplifier (LPA) comes in two versions:
1) The LPA50 (with a 50 W output)
2) The LPA100 (with a 100 W output)
Both are class A amplifiers that put out their rated power of 50 and 100 watts continuously over a
frequency range of 30–535 kHz. Both units are designed for inserting between an existing carrier set and
the line tuner to boost the normal power output of the carrier system.
1.2 Standard Nomenclature
The standard nomenclature for PULSAR’s linear power amplifier equipment is as follows:
Cabinet – contains fixed-racks, swing-racks, or open racks
Rack – contains one or more chassis (e.g., the LPA–100)
Chassis – contains several printed circuit boards, called modules (e.g., Power Supply or Power
Amplifier)
Module – contains a number of functional circuits
Circuit – a complete function on a printed circuit board
1.3 LPA50/LPA100 Chassis
As explained in the “LPA50/LPA100 Configurations” section later, there are two possible chassis config-
urations for the linear power amplifier. All chassis have the following standard dimensions:
Height – 5.25” (133.35 mm), requiring 3 rack units, each measuring 1.75” (44.45 mm)
Width – 19.00” (482.6 mm)
Depth – 13.50” (342.9 mm)
This is the same size chassis used for PULSAR’s TC-10B/TCF-10B carrier sets. Each chassis is notched
for mounting in a standard relay rack.
Chapter 1. Product Description

Figure 1–1. Front View of the LPA Chassis.
100W COMBINER 50W COMBINER
POWER SUPPLY
POWER
INPUT OUTPUT +20V –20V COMMON
POWER SUPPLY
POWER
INPUT OUTPUT +20V –20V COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
100W COMBINER 50W COMBINER
POWER SUPPLY
POWER
INPUT OUTPUT +20V –20V COMMON
POWER SUPPLY
POWER
INPUT OUTPUT +20V –20V COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
10W POWER AMP
TRANSMIT
INPUT
LEVEL
SET
INPUT COMMON
LPA100 Chassis 1 of 2
LPA100 Chassis 2 of2/LP
A50 Chassis
Output, RED
50W ext. WHITE
50W int. BLUE
Common BLACK
PA#1 ORANGE PA#1 ORANGE
PA#2 YELLOW PA#2 YELLOW
PA#3 WHITE PA#3 WHITE
PA#4 BLUE PA#4 BLUE
Common BLACK Common BLACK
Output, RED Output, RED

Chapter 1 Product Description
June 2001 Page 1–3
1
1.4 LPA50/LPA100 Modules
The LPA50 functional block diagram is shown in Figure 1-2; the LPA100 circuitry is shown in the func-
tional block diagrams in Figure 1-3 (for chassis 1 of 2) and Figure 1-4 (for chassis 2 of 2). Circuit
descriptions, complete with schematic diagrams and parts lists for each module, are shown in Chapters 7
through 10, along with sub numbers indicating the current revisions for each module, as follows:
Chapter Module Schematic Parts List
7. Power Supply 1617C38-2 1617C38-2
8. 12.5W Power Amplifier 1606C33-21 1606C33-21
9. 50W Combiner CA30-CMBMN* CA40-CMBMN*
10. 100W Combiner CA30-CMBMN* CA40-CMBMN*
* Differences for each module are noted on document.
1.5 LPA50/LPA100 Configurations
The PULSAR Linear Power Amplifier (LPA) cones in two configurations:
1) The LPA50 (one chassis with a 50 W output)
2) The LPA100 (two chassis with a combined 100 W output)
1.5.1 LPA50 Configuration
The LPA50 comprises one chassis assembly and the following:
• Power Supply Module (2)
• 12.5W Power Amplifier Module (4)
• 50W Combiner Module (1)
The modular layout for the LPA50 chassis is shown in Figure 1-1. At each end of the chassis is a Power
Supply Module and two 12.5W Power Amplifier Modules. Each Power Supply Module powers the two
12.5W Power Amplifier Modules closest to it. This gives a measure of redundancy such that if you lose
one Power Supply Module, the remaining Power Supply Module will still power the other two 12.5W
Power Amplifier Modules. The Power Combiner Module is in the center of the chassis. It combines the
output from the four Power Amplifier Modules into a single 50 watt output.
The 50W Power Combiner Module is completely passive and thus requires no power. It requires equal
amplitude and in-phase carrier frequency signals for minimum loss in the combiner circuit. Whatever
difference there is between the two signals being combined is dissipated as heat in the high wattage
resistors on this module. In normal operation all of the 12.5W Power Amplifier Modules are putting out
equal amplitude and in-phase signals, and there is almost zero loss in the combiner circuit.
1.5.2 LPA100 Configuration
The LPA100 comprises two chassis assemblies and the following:
• Power Supply Module (2 in each chassis for a total of 4)
• 12.5W Power Amplifier Module (4 in each chassis for a total of 8)
• 50W Combiner Module (1 in each chassis for a total of 2)
• 100W Combiner Module (1)
• Interconnecting cables (1 lot)

Page 1–4 June 2001
50W / 100W Linear Power Amplifier System Manual
Technologies, Inc.
The modular layout for the two LPA100 chassis is shown in Figure 1-1. The first LPA100 chassis (1 of 2)
has a Power Supply Module and two 12.5W Power Amplifier Modules at each end. In between are both a
50W Power Combiner Module and a 100W Power Combiner Module. The second LPA100 chassis (2 of
2) is just like the LPA50 chassis. It has a Power Supply Module and two 12.5W Power Amplifier Modules
at each end and a 50W Combiner Module in the center.
In both chassis, the 50W Power Combiner Module combines the output from the four Power Amplifier
Modules into a single 50 watt output. The 100W Power Combiner Module in chassis 1 combines the
output from the two 50W Power Combiner Modules into a single 100 watt output. The 50W/100W Power
Combiner Modules are completely passive and thus require no power. They require equal amplitude and
in-phase carrier frequency signals for minimum loss in the combiner circuit. Whatever difference there is
between the two signals being combined is dissipated as heat in the high wattage resistors on this module.
In normal operation all of the 12.5W Power Amplifier Modules are putting out equal amplitude and in-
phase signals, and there is almost zero loss in the combiner circuit.
As with the LPA50, each Power Supply Module in each chassis powers the two 12.5W Power Amplifier
Modules closest to it. This gives a measure of redundancy for each chassis such that if you lose one Power
Supply Module, the remaining Power Supply Module will still power the other two 12.5W Power
Amplifier Modules.
The only difference between the LPA100’s two chassis is the addition of the 100W Power Combiner
Module in chassis 1 and the backplane jumper settings (see figure 3-4 in chapter 3).
1.6 LPA50/LPA100 Module Front Panels
The front (control) panel for each module could include the following types of controls:
• Switches • LEDs • Meter
• Potentiometers • Test points
The front panels for the LPA50 chassis and the two LPA100 chassis are the same, except for the 100W
Power Combiner Module’s test points. This module is only in chassis 1 of 2 of the LPA100.
1.7 LPA50/LPA100 Printed Circuit Boards (PCBs)
A module’s printed circuit board (PCB) could include the following types of controls:
• Switches • Jumpers • Variable Capacitors
• Potentiometers • Test Points • Impedance Matching Jumpers
1.8 LPA50/LPA100 Rear Panel (“Mother Board”)
(See Chapter 3 for a description of the Rear Panel.)

Chapter 1 Product Description
June 2001 Page 1–5
1
1.9 Specifications
The LPA50 and LPA100 meet or exceed all applicable ANSI/IEEE standards. Table 1-1 shows the
technical specifications for the LPA50. The technical specifications for the LPA100 are shown in
Table 1-2.
Frequency Bandwidth 30 kHz–535 kHz
Input impedance 50Ωwith all four 12.5W Power Amplifiers plugged in
Output impedance 50Ωwith all four 12.5W Power Amplifiers plugged in
Maximum power input 10 W (+40 dBm, 50 Ωreference)
Minimum power input 10 mW (+10 dBm, 50 Ωreference)
(to get 50 W output)
Maximum power output 50 W continuous single frequency (+47 dBm, 50Ω
reference)
Harmonic & spurious output 55 dB below 50 W
Overall power loss for failure of the 12.5W Power Amplifier(s):
One 12.5W Power Amplifier failure -2.9dB
Two 12.5W Power Amplifier failures -6.4 dB
Three 12.5W Power Amplifier failures -12.8 dB
Table 1–1. LPA50 Technical Specifications.

Page 1–6 June 2001
50W / 100W Linear Power Amplifier System Manual
Technologies, Inc.
Frequency Bandwidth 30 kHz–535 kHz
Input impedance 25Ωwith all eight 12.5W Power Amplifiers plugged in
Output impedance 50Ωwith all eight 12.5W Power Amplifiers plugged in
Maximum power input 10 W (+40 dBm, 50Ωreference)
Minimum power input 10 mW (+10 dBm, 50Ωreference)
(to get 100 W output)
Maximum power output 100 W continuous single frequency (+47 dBm, 50Ω
reference)
Harmonic & spurious output 55 dB below 100 W
Overall power loss for failure of the 12.5W Power Amplifier(s):
One 12.5W Power Amplifier failure -1.1 dB
Two 12.5W Power Amplifier failures -2.5 dB
Three 12.5W Power Amplifier failures -4.1 dB
Four 12.5W Power Amplifier failures -6.0 dB
Five 12.5W Power Amplifier failures -8.5 dB
Six 12.5W Power Amplifier failures -12.0 dB
Seven 12.5W Power Amplifier failures -18.0 dB
Table 1–2. LPA100 Technical Specifications.

Chapter 1 Product Description
June 2001 Page 1–7
1
1.10 Environmental Requirements
This section provides three tables depicting the LPA50/LPA100 environmental requirement specifications,
broken down as follows:
• Environmental Requirements (Table 1-3)
• Altitude Dielectric Strength De-Rating for Air Insulation (Table 1-4)
• Altitude Correction For Maximum Temperature Of Cooling Air (ANS C93.5) (Table 1-5)
Ambient temperature range -20 to + 60°C (derated per Table 1-5) of air-contacting
equipment
Relative humidity Up to 95% (non-condensing) at 40°C (for 96 hours cumu-
lative)
Altitude Up to 1,500 m (without derating)
Up to 6,000 m (using Table 1-4 and Table 1-5)
Transient withstand capability All external user interfaces meet SWC specifications of
ANS C37.90.1 (1989)
1-minute withstand Only isolated inputs and outputs, and all alarms: 2,500
Vdc from each terminal to ground, derated per Table 1-4.
Center conductor of coaxial 3,000 Vdc impulse level, cable to ground using 1.2 x 50
cable to ground msec impulse
Electro-Magnetic Interface Capability IEEE Standard ANS C37.90.2
Table 1–3. Environmental Requirements.

Page 1–8 June 2001
50W / 100W Linear Power Amplifier System Manual
Technologies, Inc.
Altitude (Meters) Correction Factor
1,500 1.00
1,800 0.97
2,100 0.94
2,400 0.91
2,700 0.87
3,000 0.83
3,600 0.79
4,200 0.74
4,800 0.69
5,400 0.64
6,000 0.59
Table 1–4.
Altitude Dielectric Strength
De-Rating for Air Insulation
Temperatures (Degrees C)
Altitude (Meters) Short-Time Long-Time Difference
From Usual
Usual 1,500 55 40 —
Unusual 2,000 53 38 2
Unusual 3,000 48 33 7
Unusual 4,000 43 28 12
Table 1–5.
Altitude Correction For Maximum
Temperature Of Cooling Air (ANS C93.5)

Chapter 1 Product Description
June 2001 Page 1–9
1
Chassis Gnd
50W Power Combiner Module
TP1
Black
TP5
White
TP2
Blue
*
TP4
Orange
TP3
Yellow
50 W output
to line tuner
or hybrids
F
V out/V in
600KHz
TP6
Red
J9
Output
(UHF)
Low
Pass
Filter
Power
Combiner
J8
Input
(BNC)
~9.5dBm
Input
~41.3dBm
~41.3dBm 47.0dBm
~41.3dBm
~41.3dBm
~9.5dBm
Input
~9.5dBm
Input
~9.5dBm
Input
From J1
(UHF) output
of driving
Carrier set
Com
300
100
12.5W
PWR AMP
#2
12.5W
PWR AMP
#4
12.5W
PWR AMP
#3
12.5W
PWR AMP
#1
Com
Com
Com
Figure 1–2. LPA50 Functional Diagram

Page 1–10 June 2001
50W / 100W Linear Power Amplifier System Manual
Technologies, Inc.
50.0dBm
TP6
Red J1
Output (UHF) 50dBm
100W Output
to line tuner
or hybrids
100W Power Combiner Module
50W Power Combiner Module
Power
Combiner
TP1
Black
TP1
Black
~47.3dBm TP5
White
TP5
White
~47.3dBm
TP2
Blue
TP2
Blue
50W
In 1
*
*
These coaxial cables
and necessary adapters
are provided loose with
the 100W LPA.
*
50W
In 2
~47.3 dBm
~47.3 dBm
~41.7 dBm
~41.7 dBm
~41.7 dBm
~41.7 dBm
~47.3 dBm
~6 dBm
Input
J2
Input
(BNC)
100
100
Com
12.5W
PWR AMP
#2
12.5W
PWR AMP
#4
12.5W
PWR AMP
#3
12.5W
PWR AMP
#1
TP4
Orange
TP3
Yellow
J3
50W
Input
(BNC)
From
Chassis 2 of 2 From
Chassis 2 of 2
F
V out/V in
600KHz
TP6
Red
Power
Combiner
Low
Pass
Filter
Chassis Gnd
Chassis Gnd
Com
Com
Com
~6 dBm
Input
~6 dBm
Input
~6 dBm
Input
Figure 1–3. LPA100 Functional Diagram (1 of 2)