UBS Axcera LU1000AL Compiled Driver Manual
INSTRUCTION MANUAL
INNOVATOR LX SERIES
UHF ANALOG DRIVER/UHF TRANSLATOR
AXCERA, LLC
103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA
(724) 873-8100 • FAX (724) 873-8105
www.axcera.com • info@axcera.com
Analog UHF Driver/Translator Table of Contents
TABLE OF CONTENTS
SECTION PAGE
CHAPTER 1 INTRODUCTION
1.1 Manual Overview ............................................................................ 1-1
1.2 Assembly Designation Numbers ......................................................... 1-1
1.3 Safety........................................................................................... 1-1
1.4 Maintenance.................................................................................. 1-2
1.5 Material Return Procedure................................................................. 1-2
1.6 Limited One-Year Warranty for Axcera Products .................................... 1-3
CHAPTER 2 SYSTEM DESCRIPTION & REMOTE CONTROL CONNECTIONS
2.1 System Overview ........................................................................... 2-1
2.1.1 Receiver Tray ........................................................................ 2-2
2.1.2 IF Processor Module ................................................................ 2-3
2.1.3 LO/Upconverter Module ........................................................... 2-5
2.1.4 Control & Monitoring/Power Supply Module .................................. 2-7
2.1.5 Power Amplifier Module ........................................................... 2-8
2.1.6 RF Output Assemblies.............................................................. 2-9
2.2 Control and Status .......................................................................... 2-9
2.2.1 Front Panel LCD Display Screen ................................................2-10
2.3 System Operation ..........................................................................2-10
2.3.1 Principles of Operation ............................................................2-11
2.4 Customer Remote Connections .........................................................2-12
CHAPTER 3 SITE CONSIDERATIONS, INSTALLATION AND SETUP PROCEDURES
3.1 Site Considerations.......................................................................... 3-1
3.2 Unpacking the Chassis w/Modules and Receiver Tray.............................. 3-4
3.3 Installing the Chassis w/Modules and Receiver Tray............................... 3-4
3.4 AC Input ....................................................................................... 3-6
3.5 Setup and Operation........................................................................ 3-6
3.5.1 Input Connections .................................................................. 3-7
3.5.2 Front Panel Screens for the Exciter/Amplifier Chassis Assembly ....... 3-9
CHAPTER 4 CIRCUIT DESCRIPTIONS
4.1 Receiver Tray ................................................................................. 4-1
4.1.1 50-Ohm Filter........................................................................ 4-1
4.1.2 Dual Stage Amplifier Assembly .................................................. 4-1
4.1.3 Channel Filter........................................................................ 4-1
4.1.4 Downconverter Amp lifier Assembly ............................................ 4-2
4.1.5 Channel Oscillator Assembly ..................................................... 4-2
4.1.6 x8, x2, x4 Multiplier Board ....................................................... 4-2
4.1.7 L.O. Filter ............................................................................. 4-2
4.1.8 IF Filter/ALC Board ................................................................. 4-2
4.1.9 SAW Board (Optional) ............................................................. 4-2
4.1.10 IF Amplifier Board (Optional)................................................... 4-3
4.1.11 IF Filter/Limit er Board (Optional) ............................................. 4-3
4.1.12 IF PLL Board (Optional) .......................................................... 4-3
4.1.13 IF Carrier Oven Oscillator (Optional) ......................................... 4-3
LX Series, Rev. 0 August 29, 2003 i
Analog UHF Driver/Translator Table of Contents
TABLE OF CONTENTS - (Continued)
SECTION ......................................................................................... PAGE
4.1.14 +/ - 12V Power Supply Board................................................... 4-4
4.2 IF Processor Module ......................................................................... 4-4
4.2.1 IF Processor Board.................................................................. 4-4
4.3 LO/Upconverter Module ...................................................................4-10
4.3.1 UHF Generator Board .............................................................4-10
4.3.2 UHF Filters ...........................................................................4-11
4.3.3 LO/Upconverter Board ............................................................4-11
4.4 Control Monitoring/Power Supply Module ............................................4-15
4.4.1 Power Protection Board ...........................................................4-16
4.4.2 Control Board .......................................................................4-16
4.4.3 Switch Board ........................................................................4-19
4.4.4 Switching Power Supply Assembly ............................................4-19
4.5 Power Amplifier Module Assembly......................................................4-19
4.5.1 1-Watt Amplifier Module Assembly ............................................4-19
4.5.2 1-Watt UHF Amplifier Board.....................................................4-19
4.5.3 40 Watt UHF Amplifier Assembly ...............................................4-20
4.5.4 UHF Module Assembly, RF Module Pallet .....................................4-20
4.5.5 Coupler Board Assembly .........................................................4-21
4.5.6 Amplifier Control Board ...........................................................4-21
CHAPTER 5 DETAILED ALIGNMENT PROCEDURES
Module Replacement ............................................................... 5-1
Initial Test Setup .................................................................... 5-1
5.1 UHF/VHF Receiver Tray..................................................................... 5-2
5.1.1 UHF Filter ............................................................................. 5-2
5.1.2 Dual Stage Amplifier Board....................................................... 5-2
5.1.3 UHF Filter ............................................................................. 5-2
5.1.4 Channel Oscillator Assembly ..................................................... 5-2
5.1.5 x8, x4, x2 Multiplier Board ....................................................... 5-3
5.1.6 UHF Filter ............................................................................. 5-4
5.1.7 Downconverter Amplifier Board ................................................. 5-4
5.1.8 IF Filter/ALC Board ................................................................. 5-4
5.1.9 SAW Filter Board (Optional) ...................................................... 5-4
5.1.10 +/ - 12V Power Supply ........................................................... 5-4
5.1.11 IF Carrier Oscillator Board (Optional) ........................................ 5-4
5.1.12 IF Filter/Limiter Board ............................................................ 5-4
5.1.13 IF PLL Board (Optional) .......................................................... 5-4
5.1.14 IF Amplifier Board, High Gain (Optional) .................................... 5-5
5.2 Innovator LX Series Exciter/Amplifier Chassis Assembly .......................... 5-6
5.2.1 Linearity Correction Adjustment ................................................ 5-6
5.2.2 Frequency Response Delay Equalization Adjustment ...................... 5-7
5.2.3 Calibration of Output Power and Reflected Power .......................... 5-7
5.3 Alignment Procedure for the Band-pass Filte r Assembly ........................ 5-8
APPENDICES
APPENDIX A SYSTEM SPECIFICATIONS
APPENDIX B DRAWINGS AND PARTS LISTS
LX Series, Rev. 0 August 29, 2003 ii
Analog UHF Driver/Translator Table of Contents
LIST OF FIGURES
FIGURE PAGE
3-1 1 kW Minimum Ventilation Configuration ....................................... 3-4
3-2 Tray Slide Cabinet Mounting Diagram ........................................... 3-5
3-3 Front and Rear View Reconnection Drawing ................................... 3-6
3-4 Rear View of Innovator LX Series UHF Translator............................ 3-7
5-1 Typical Red Field Spectrum......................................................... 5-7
LX Series, Rev. 0 iii
Analog UHF Driver/Translator Table of Contents
LIST OF TABLES
TABLE PAGE
2-1 10-100W Innovator LX Series Translator Assemblies and Tray ........... 2-1
2-5 Receiver Samples ..................................................................... 2-2
2-6 IF Processor Front Panel Switch................................................... 2-4
2-7 IF Processor Front Panel Status Indicators ..................................... 2-4
2-8 IF Processor Front Panel Control Adjustments................................. 2-4
2-9 IF Processor Front Panel Sample.................................................. 2-4
2-10 LO/Upconverter Front Panel Switch .............................................. 2-6
2-11 LO/Upconverter Front Panel Status Indicators ................................ 2-6
2-12 LO/Upconverter Front Panel Control Adjustments............................ 2-6
2-13 LO/Upconverter Front Panel Samples ............................................ 2-6
2-14 Controller/Power Supply Front Panel Display .................................. 2-7
2-15 Controller/Power Supply Front Panel Status Indicators ..................... 2- 7
2-16 Controller/Power Supply Front Panel Control Adjustments................. 2-7
2-17 Power Amplifier Front Panel Status Indicators................................. 2-9
2-18 Power Amplifier Front Panel Control Adjustments ............................ 2-9
2-19 Power Amplifier Front Panel Sample ............................................. 2-9
2-22 VHF Television Frequenc ies........................................................2-11
2-23 UHF Television Frequencies .......................................................2-11
2-25 Innovator LX Series Chassis Customer Remote Connections .............2-13
3-1 Rear Chassis Connections for Receiver Tray................................... 3-7
3-2 Rear Chassis Connections for LX Series Translators (driver) .............. 3-7
3-3 Menu 01 Splash Screen #1 ......................................................... 3-9
3-4 Menu 02 Splash Screen #2 ......................................................... 3-9
3-5 Menu 10 Main Screen................................................................ 3-9
3-6 Menu 11 Error List Screen.........................................................3-10
3-7 Menu 12 Translator Device Data Access Screen .............................3-10
3-8 Menu 13 Translator Configuration Access Screen............................3-10
3-9 Menu 20 Error List Display Screen...............................................3-10
3-10 Menu 30 Translator Device Details Screen ....................................3-10
3-11 Translator Device Parameters ....................................................3-12
3-12 Menu 40 Translator Set Up: Power Raise/Lower Screen ...................3-13
3-13 Menu 40-1 Translator Set Up: Xltr. Model Select Screen ..................3-13
3-14 Menu 40-2 Translator Set Up: Frequency Select Screen...................3-13
3-15 Menu 40-3 Translator Set Up: Frequency Table Select Screen...........3-13
3-16 Menu 40-4 Translator Set Up: IF Frequency Screen ........................3-14
3-17 Menu 40-5 Translator Set Up: Custom Frequency Select Screen........3-14
3-18 Menu 40-6 Translator Set Up: Serial Address Screen ......................3-14
3-19 Menu 40-7 Translator Set Up: Xltr. Visual Power Cal. Screen ............3-14
3-20 Menu 40-8 Translator Set Up: Xltr. Aural Power Cal. Screen .............3-15
3-21 Menu 40-9 Translator Set Up: Xltr. Rfltd. Power Cal. Screen.............3-15
3-22 Menu 40-10 Translator Set Up: Fwd. Power Fault Thresh. Screen......3-15
3-23 Menu 40-11 Translator Set Up: Rflt. Power Fault Thresh. Screen .......3-15
3-23 Menu 40-12 Translator Set Up: Remote Commands Control .............3-16
LX Series, Rev. 0 iv
Analog UHF Driver/Translator Chapter 1, Introduction
Chapter 1
Introduction
This manual explains the installation,
setup, alignment, and maintenance
procedures for the Innovator LX Series
modular UHF translator. It is important
that you read all of the instructions,
especially the safety information in this
chapter, before you begin to install or
operate the unit.
1.1 Manual Overview
This instruction manual is divided into
five chapters and supporting appendices.
Chapter 1, Introduction, contains
information on the assembly numbering
system used in the manual, safety,
maintenance, return procedures, and
warranties. The second chapter describes
the translator and includes discussions on
system control and status indicators and
remote control connections. Chapter 3
explains how to unpack, install, setup,
and operate the translator. Chapter 4
contains circuit -level descriptions for
boards and board-level components in
the translator. Chapter 5, Detailed
Alignment Procedures, provides
information on adjusting the system
assemblies for optimal operation. The
appendices contain a sample log sheet,
test data sheet, assembly and
subassembly drawings and parts lists,
and system specifications.
1.2 Assembly Designators
Axcera has assigned assembly numbers,
such as Ax (x=1,2,3…), to all assemblies,
trays, and boards that are referenced in
the text of this manual and shown on the
block diagrams and interconnect
drawings provided in the appendices.
These supporting documents are
arranged in increasing numerical order in
the appendices. Section titles in the text
for assembly or tray descriptions or
alignment procedures contain the
associated part number(s) and the
relevant appendix that contains the
drawings for that item.
1.3 Safety
The UHF translators manufactured by
Axcera are designed to be easy to use
and repair while providing protection
from electrical and mechanical hazards.
Listed throughout the manual are notes,
cautions, and warnings concerning
possible safety hazards that may be
encountered while operating or servicing
the translator. Please review these
warnings and familiarize yourself with the
operation and servicing procedures
before working on the translator.
Read All Instructions – All of the
operating and safety instructions should
be read and understood before operating
this equipment.
Retain Manuals – The manuals for the
translator should be retained at the
translator site for future reference. We
provide two sets of manuals for this
purpose; one set can be left at the office
while one set can be kept at the site.
Heed all Notes, Warnings, and
Cautions – All of the notes, warnings,
and cautions listed in this safety section
and throughout the manual must be
followed.
Follow Instructions – All of the
operating and use instructions for the
translator should be followed.
Cleaning – Unplug or otherwise
disconnect all power from the equipment
before cleaning. Do not use liquid or
aerosol cleaners. Use a damp cloth for
cleaning.
Ventilation – Openings in the cabinets
and tray front panels are provided for
ventilation. To ensure the reliable
LX Series, Rev. 0 1-1
Analog UHF Driver/Translator Chapter 1, Introduction
operation of the translator, and to protect
the unit from overheating, these
openings must not be blocked.
Servicing – Do not attempt to service
this product yourself until becoming
familiar with the equipment. If in doubt,
refer all servicing questions to qualified
Axcera service personnel.
Replacement Parts – When
replacement parts are used, be sure that
the parts have the same functional and
performance characteristics as the
original part. Unauthorized substitutions
may result in fire, electric shock, or other
hazards. Please contact the Axcera
Technical Service Department if you have
any questions regarding service or
replacement parts.
1.4 Maintenance
The Innovator LX Series Translator is
designed with components that require
little or no periodic maintenance except
for the routine cleaning of the fans and
the front panels of the trays.
The amount of time between cleanings
depends on the conditions within the
transmitter room. While the electronics
have been designed to function even if
covered with dust, a heavy buildup of
dust, dirt, or insects will affect the
cooling of the components. This could
lead to a thermal shutdown or the
premature failure of the affected trays.
When the front panels of the trays
become dust covered, the top covers
should be take n off and any accumulated
foreign material should be removed. A
vacuum cleaner, utilizing a small, wandtype attachment, is an excellent way to
suction out the dirt. Alcohol and other
cleaning agents should not be used
unless you are certain that the solvents
will not damage components or the silkscreened markings on the trays and
boards. Water-based cleaners can be
used, but do not saturate the
components. The fans and heatsinks
should be cleaned of all dust or dirt to
permit the free flow of air for cooling
purposes.
It is recommended that the operating
parameters of the translator be recorded
from the meters on the trays and the
system metering control panel at least
once a month. It is suggested that this
data be retained in a rugged folder or
envelope. A sample format for a log
sheet is provided in Appendix A.
Photocopies of the log sheet should be
made to allow for continued data entries.
1.5 Material Return Procedure
To insure the efficient handling of
equipment or components that have been
returned for repair, Axcera requests that
each returned item be accompanied by a
Material Return Authorization Number
(MRA#).
An MRA# can be obtained from any
Axcera Field Service Engineer by
contacting the Axcera Field Service
Department at (724) 873-8100 or by fax
at (724) 873-8105. This procedure
applies to all items sent to the Field
Service Department regardless of
whether the item was originally
manufactured by Axcera.
When equipment is sent to the field on
loan, an MRA# is included with the unit.
The MRA# is intended to be used when
the unit is returned to Axcera. In
addition, all shipping material should be
retained for the return of the unit to
Axcera.
Replacement assemblies are also sent
with an MRA# to allow for the proper
routing of the exchanged hardware.
Failure to close out this type of MRA# will
normally result in the customer being
invoiced for the value of the loaner item
or the exchange assembly.
When shipping an item to Axcera, please
include the MRA# on the packing list and
on the shipping container.
LX Series, Rev. 0 1-2
Analog UHF Driver/Translator Chapter 1, Introduction
The packing slip should also include
contact information and a brief
description of why the unit is being
returned.
Please forward all MRA items to:
AXCERA, LLC
103 Freedom Drive
P.O. Box 525
Lawrence, PA 15055-0525 USA
For more information concerning this
procedure, call the Axcera Field Service
Department.
Axcera can also be contacted through email at info@axcera.com and on the
Web at www.axcera.com.
1.6 Limited One-Year Warranty for
Axcera Products
Axcera warrants each new product that
it has manufactured and sold against
defects in material and workmanship
under normal use and service for a
period of one (1) year from the date of
shipment from Axcera's plant, when
operated in accordance with Axcera's
operating instructions. This warra nty
shall not apply to tubes, fuses,
batteries, or bulbs.
Warranties are valid only when and if
(a) Axcera receives prompt written
notice of breach within the period of
warranty, (b) the defective product is
properly packed and returned by the
buyer (transportation and insurance
prepaid), and (c) Axcera determines, in
its sole judgment, that the product is
defective and not subject to any misuse,
neglect, improper installation,
negligence, accident, or (unless
authorized in writing by Axcera) repair
or alt eration. Axcera's exclusive liability
for any personal and/or property
damage (including direct, consequential,
or incidental) caused by the breach of
any or all warranties, shall be limited to
the following: (a) repairing or replacing
(in Axcera's sole discretion) any
defective parts free of charge (F.O.B.
Axcera’s plant) and/or (b) crediting (in
Axcera's sole discretion) all or a portion
of the purchase price to the buyer.
Equipment furnished by Axcera, but not
bearing its trade name, shall bear no
warranties other than the special hours of-use or other warranties extended by
or enforceable against the manufacturer
at the time of delivery to the buyer. NO
WARRANTIES, WHETHER
STATUTORY, EXPRESSED, OR
IMPLIED, AND NO WARRANTIES OF
MERCHANTABILITY, FITNESS FOR
ANY PARTICULAR PURPOSE, OR
FREEDOM FROM INFRINGEMENT,
OR THE LIKE, OTHER THAN AS
SPECIFIED IN PATENT LIABILITY
ARTICLES, AND IN THIS ARTICLE,
SHALL APPLY TO THE EQUIPMENT
FURNISHED HEREUNDER.
LX Series, Rev. 0 1-3
Analog UHF Driver/Translator Chapter 1, Introduction
FF WARNING!!!
×× HIGH VOLTAGE ØØ
DO NOT ATTEMPT TO REPAIR OR TROUBLESHOOT THIS EQUIPMENT UNLESS
YOU ARE FAMILIAR WITH ITS OPERATION AND EXPERIENCED IN
SERVICING HIGH VOLTAGE EQUIPMENT. LETHAL VOLTAGES ARE PRESENT
WHEN POWER IS APPLIED TO THIS SYSTEM. IF POSSIBLE, TURN OFF
POWER BEFORE MAKING ADJUSTMENTS TO THE SYSTEM.
«« RADIO FREQUENCY RADIATION HAZARD ««
MICROWAVE, RF AMPLIFIERS AND TUBES GENERATE HAZARDOUS RF
RADIATION THAT CAN CAUSE SEVERE INJURY INCLUDING CATARACTS,
WHICH CAN RESULT IN BLINDNESS. SOME CARDIAC PACEMAKERS MAY BE
AFFECTED BY THE RF ENERGY EMITTED BY RF AND MICROWAVE
AMPLIFIERS. NEVER OPERATE THE TRANSLATOR SYSTEM WITHOUT A
PROPERLY MATCHED RF ENERGY ABSORBING LOAD ATTACHED. KEEP
PERSONNEL AWAY FROM OPEN WAVEGUIDES AND ANTENNAS. NEVER LOOK
INTO AN OPEN WAVEGUIDE OR ANTENNA. MONITOR ALL PARTS OF THE RF
SYSTEM FOR RADIATION LEAKAGE AT REGULAR INTERVALS.
LX Series, Rev. 0 1-4
Analog UHF Driver/Translator Chapter 1, Introduction
EMERGENCY FIRST AID INSTRUCTIONS
Personnel engaged in the installation, operation, or maintenance of this equipment are urged to become
familiar with the following rules both in theory and practice. It is the duty of all operating personnel to be
prepared to give adequate Emergency First Aid and thereby prevent avoidable loss of life.
RESCUE BREATHING
1. Find out if the person is
breathing.
You must find out if the person
has stopped breathing. If you
think he is not breathing, place
him flat on his back. Put your ear
close to his mouth and look at his
chest. If he is breathing you can
feel the air on your cheek. You
can see his chest move up and
down. If you do not feel the air
or see the chest move, he is not
breathing.
2. If he is not breathing, open
the airway by tilting his head
backwards.
Lift up his neck with one hand
and push down on his forehead
with the other. This opens the
airway. Sometimes doing this will
let the person breathe again by
himself.
SKIN REDDENED: Apply ice cold water to burned
area to prevent burn from going deeper into skin
tissue. Cover area with clean sheet or cloth to keep
away air. Consult a physician.
SKIN BLISTERED OR FLESH CHARRED: Apply ice
cold water to burned area to prevent burn from
going deeper into skin tissue.
3. If he is still not breathing,
begin rescue breathing.
-Keep his head tilted backward.
Pinch nose shut.
-Put your mouth tightly over his
mouth.
-Blow into his mouth once every
five seconds
-DO NOT STOP rescue breathing
until help arrives.
LOOSEN CLOTHING - KEEP
WARM
Do this when the victim is
breathing by himself or help is
available. Keep him as quiet as
possible and from becoming
chilled. Otherwise treat him for
shock.
BURNS
Cover area with clean sheet or cloth to keep away
air. Treat victim for shock and take to hospital.
EXTENSIVE BURN - SKIN BROKEN: Cover area with
clean sheet or cloth to keep away air. Treat victim
for shock and take to hospital.
LX Series, Rev. 0 1-5
Analog UHF Driver/Translator Chapter 1, Introduction
Note: Because of possible FCC assigned offset, check for the assigned Carrier
Frequency as written on License.
UHF Channels NTSC Standard IF, 45.75 MHz
Visual Carrier Frequency (MHz)
Channel Nominal Minus Plus Nominal Nominal Minus Plus
14 471.25 471.24 471.26 517.00 64.625 64.62375 64.62625
15 477.25 477.24 477.26 523.00 65.375 65.37375 65.37625
16 483.25 483.24 483.26 529.00 66.125 66.12375 66.12625
17 489.25 489.24 489.26 535.00 66.875 66.87375 66.87625
18 495.25 495.24 495.26 541.00 67.625 67.62375 67.62625
19 501.25 501.24 501.26 547.00 68.375 68.37375 68.37625
20 507.25 507.24 507.26 553.00 69.125 69.12375 69.12625
21 513.25 513.24 513.26 559.00 69.875 69.87375 69.87625
22 519.25 519.24 519.26 565.00 70.625 70.62375 70.62625
23 525.25 525.24 525.26 571.00 71.375 71.37375 71.37625
24 531.25 531.24 531.26 577.00 72.125 72.12375 72.12625
25 537.25 537.24 537.26 583.00 72.875 72.87375 72.87625
26 543.25 543.24 543.26 589.00 73.625 73.62375 73.62625
27 549.25 549.24 549.26 595.00 74.375 74.37375 74.37625
L.O.
(MHz)
Crystal Frequency (MHz)
28 555.25 555.24 555.26 601.00 75.125 75.12375 75.12625
29 561.25 561.24 561.26 607.00 75.875 75.87375 75.87625
30 567.25 567.24 567.26 613.00 76.625 76.62375 76.62625
31 573.25 573.24 573.26 619.00 77.375 77.37375 77.37625
32 579.25 579.24 579.26 625.00 78.125 78.12375 78.12625
33 585.25 585.24 585.26 631.00 78.875 78.87375 78.87625
34 591.25 591.24 591.26 637.00 79.625 79.62375 79.62625
35 597.25 597.24 597.26 643.00 80.375 80.37375 80.37625
36 603.25 603.24 603.26 649.00 81.125 81.12375 81.12625
37 609.25 609.24 609.26 655.00 81.875 81.87375 81.87625
38 615.25 615.24 615.26 661.00 82.625 82.62375 82.62625
39 621.25 621.24 621.26 667.00 83.375 83.37375 83.37625
40 627.25 627.24 627.26 673.00 84.125 84.12375 84.12625
41 633.25 633.24 633.26 679.00 84.875 84.87375 84.87625
42 639.25 639.24 639.26 685.00 85.625 85.62375 85.62625
43 645.25 645.24 645.26 691.00 86.375 86.37375 86.37625
LX Series, Rev. 0 1-6
Analog UHF Driver/Translator Chapter 1, Introduction
Note: Because of possible FCC assigned offset, check for the assigned Carrier
Frequency as written on License.
UHF Channels NTSC Standard IF, 45.75 MHz
Visual Carrier Frequency (MHz)
Channel Nominal Minus Plus Nominal Nominal Minus Plus
44 651.25 651.24 651.26 697.00 87.125 87.12375 87.12625
45 657.25 657.24 657.26 703.00 87.875 87.87375 87.87625
46 663.25 663.24 663.26 709.00 88.625 88.62375 88.62625
47 669.25 669.24 669.26 715.00 89.375 89.37375 89.37625
48 675.25 675.24 675.26 721.00 90.125 90.12375 90.12625
49 681.25 681.24 681.26 727.00 90.875 90.87375 90.87625
50 687.25 687.24 687.26 733.00 91.625 91.62375 91.62625
51 693.25 693.24 693.26 739.00 92.375 92.37375 92.37625
52 699.25 699.24 699.26 745.00 93.125 93.12375 93.12625
53 705.25 705.24 705.26 751.00 93.875 93.87375 93.87625
54 711.25 711.24 711.26 757.00 94.625 94.62375 94.62625
55 717.25 717.24 717.26 763.00 95.375 95.37375 95.37625
56 723.25 723.24 723.26 769.00 96.125 96.12375 96.12625
57 729.25 729.24 729.26 775.00 96.875 96.87375 96.87625
L.O.
(MHz)
Crystal Frequency (MHz)
58 735.25 735.24 735.26 781.00 97.625 97.62375 97.62625
59 741.25 741.24 741.26 787.00 98.375 98.37375 98.37625
60 747.25 747.24 747.26 793.00 99.125 99.12375 99.12625
61 753.25 753.24 753.26 799.00 99.875 99.87375 99.87625
62 759.25 759.24 759.26 805.00 100.625 100.62375 100.62625
63 765.25 765.24 765.26 811.00 101.375 101.37375 101.37625
64 771.25 771.24 771.26 817.00 102.125 102.12375 102.12625
65 777.25 777.24 777.26 823.00 102.875 102.87375 102.87625
66 783.25 783.24 783.26 829.00 103.625 103.62375 103.62625
67 789.25 789.24 789.26 835.00 104.375 104.37375 104.37625
68 795.25 795.24 795.26 841.00 105.125 105.12375 105.12625
69 801.25 801.24 801.26 847.00 105.875 105.87375 105.87625
70 807.25 807.24 807.26 853.00 106.625 106.62375 106.62625
LX Series, Rev. 0 1-7
Analog UHF Driver/Translator Chapter 1, Introduction
Note: Because of possible FCC assigned offset, check for the assigned Carrier
Frequency as written on License.
UHF Frequency Assignments
Channel
Number
14 470-476 471.25 474.83 475.75
15 476-482 477.25 480.83 481.75
16 482-488 483.25 486.83 487.75
17 488-494 489.25 492.83 493.75
18 494-500 495.25 498.83 499.75
19 500-506 501.25 504.83 505.75
20 506-512 507.25 510.83 511.75
21 512-518 513.25 516.83 517.75
22 518-524 519.25 522.83 523.75
23 524-530 525.25 528.83 529.75
24 530-536 531.25 534.83 535.75
25 536-542 537.25 540.83 541.75
26 542-548 543.25 546.83 547.75
27 548-554 549.25 552.83 553.75
28 554-560 555.25 558.83 559.75
Bandwidth
(MHz)
Video
(MHz)
Color
(MHz)
Audio
(MHz)
29 560-566 561.25 564.83 565.75
30 566-572 567.25 570.83 571.75
31 572-578 573.25 576.83 577.75
32 578-584 579.25 582.83 583.75
33 584-590 585.25 588.83 589.75
34 590-596 591.25 594.83 595.75
35 596-602 597.25 600.83 601.75
36 602-608 603.25 606.83 607.75
37 608-614 609.25 612.83 613.75
38 614-620 615.25 618.83 619.75
39 620-626 621.25 624.83 625.75
40 626-632 627.25 630.83 631.75
41 632-638 633.25 636.83 637.75
42 638-644 639.25 642.83 643.75
43 644-650 645.25 648.83 649.75
LX Series, Rev. 0 1-8
Analog UHF Driver/Translator Chapter 1, Introduction
Note: Because of possible FCC assigned offset, check for the assigned
Carrier Frequency as written on License.
UHF Frequency Assignments
Channel
Number
44 650-656 651.25 654.83 655.75
45 656-662 657.25 660.83 661.75
46 662-668 663.25 666.83 667.75
47 668-674 669.25 672.83 673.75
48 674-680 675.25 678.83 679.75
49 680-686 681.25 684.83 685.75
50 686-692 687.25 690.83 691.75
51 692-698 693.25 696.83 697.75
52 698-704 699.25 702.83 703.75
53 704-710 705.25 708.83 709.75
54 710-716 711.25 714.83 715.75
55 716-722 717.25 720.83 721.75
56 722-728 723.25 726.83 727.75
57 728-734 729.25 732.83 733.75
58 734-740 735.25 738.83 739.75
Bandwidth
(MHz)
Video
(MHz)
Color
(MHz)
Audio
(MHz)
59 740-746 741.25 744.83 745.75
60 746-752 747.25 750.83 751.75
61 752-758 753.25 756.83 757.75
62 758-764 759.25 762.83 763.75
63 764-770 765.25 768.83 769.75
64 770-776 771.25 774.83 775.75
65 776-782 777.25 780.83 781.75
66 782-788 783.25 786.83 787.75
67 788-794 789.25 792.83 793.75
68 794-800 795.25 798.83 799.75
69 800-806 801.25 804.83 805.75
70 806-812 807.25 810.83 811.75
LX Series, Rev. 0 1-9
Analog UHF Driver/Translator Chapter 1, Introduction
dBm, dBw, dBmV, dB µµV, & VOLTAGE
EXPRESSED IN WATTS
50 Ohm System
WATTS PREFIX dBm dBw dBmV
1,000,000,000,000 1 TERAWATT +150 +120
100,000,000,000 100 GIGAWATTS +140 +110
10,000,000,000 10 GIGAWATTS +130 +100
1,000,000,000 1 GIGAWATT +120 + 99
100,000,000 100 MEGAWATTS +110 + 80
10,000,000 10 MEGAWATTS +100 + 70
1,000,000 1 MEGAWATT + 90 + 60
100,000 100 KILOWATTS + 80 + 50
10,000 10 KILOWATTS + 70 + 40
1,000 1 KILOWATT + 60 + 30
100 1 HECTROWATT + 50 + 20
50 + 47 + 17
20 + 43 + 13
10 1 DECAWATT + 40 + 10
1 1 WATT + 30 0 + 77 +137 7.07V
0.1 1 DECIWATT + 20 - 10 + 67 +127 2.24V
0.01 1 CENTIWATT + 10 - 20 + 57 +117 0.707V
0.001 1 MILLIWATT 0 - 30 + 47 +107 224mV
0.0001 100 MICROWATTS - 10 - 40
0.00001 10 MICROWATTS - 20 - 50
0.000001 1 MICROWATT - 30 - 60
0.0000001 100 NANOWATTS - 40 - 70
0.00000001 10 NANOWATTS - 50 - 80
0.000000001 1 NANOWATT - 60 - 90
0.0000000001 100 PICOWATTS - 70 -100
0.00000000001 10 PICOWATTS - 80 -110
0.000000000001 1 PICOWATT - 90 -120
dBµV
VOLTAGE
TEMPERATURE CONVERSION
°°F = 32 + [(9/5) °°C]
°°C = [(5/9) (°°F - 32)]
LX Series, Rev. 0 1-10
Analog UHF Driver/Translator Chapter 1, Introduction
USEFUL CONVERSION FACTORS
TO CONVERT FROM TO MULTIPLY BY
mile (US statute) kilometer (km) 1.609347
inch (in) millimeter (mm) 25.4
inch (in) centimeter (cm) 2.54
inch (in) meter (m) 0.0254
foot (ft) meter (m) 0.3048
yard (yd) meter (m) 0.9144
mile per hour (mph) kilometer per hour(km/hr) 1.60934
mile per hour (mph) meter per second (m/s) 0.44704
pound (lb) kilogram (kg) 0.4535924
gallon (gal) liter 3.7854118
U.S. liquid
(One U.S. gallon equals 0.8327 Canadian gallon)
fluid ounce (fl oz) milliliters (ml) 29.57353
British Thermal Unit watt (W) 0.2930711
per hour (Btu/hr)
horsepower (hp) watt (W) 746
NOMENCLATURE OF FREQUENCY BANDS
FREQUENCY RANGE DESIGNATION
3 to 30 kHz VLF - Very Low Frequency
30 to 300 kHz LF - Low Frequency
300 to 3000 kHz MF - Medium Frequency
3 to 30 MHz HF - High Frequency
30 to 300 MHz VHF - Very High Frequency
300 to 3000 MHz UHF - Ultrahigh Frequency
3 to 30 GHz SHF - Superhigh Frequency
30 to 300 GHz EHF - Extremely High Frequency
LETTER DESIGNATIONS FOR UPPER FREQUENCY BANDS
LETTER FREQ. BAND
L 1000 - 2000 MHz
S 2000 - 4000 MHz
C 4000 - 8000 MHz
X 8000 - 12000 MHz
Ku 12 - 18 GHz
K 18 - 27 GHz
Ka 27 - 40 GHz
V 40 - 75 GHz
W 75 - 110 GHz
LX Series, Rev. 0 1-11
Analog UHF Driver/Translator Chapter 1, Introduction
ABBREVIATIONS/ACRONYMS
AC Alternating Current
AFC Automatic Frequency Control
ALC Automatic Level Control
AM Amplitude modulation
AGC Automatic Gain Control
AWG American wire gauge
BER Bit Error Rate
BW Bandwidth
DC Direct Current
D/A Digital to analog
dB Decibel
dBm Decibel referenced to 1 milliwatt
dBmV Decibel referenced to 1 millivolt
dBw Decibel referenced to 1 watt
FEC Forward Error Correction
FM Frequency modulation
Hz Hertz
ICPM Incidental Carrier Phase Modulation
I/P Input
IF Intermediate Frequency
LED Light emitting diode
LSB Lower Sideband
MPEG Motion Pictures Expert Group
O/P Output
PLL Phase Locked Loop
PCB Printed circuit board
QAM Quadrature Amplitude Modulation
LX Series, Rev. 0 1-12
Analog UHF Driver/Translator Chapter 1, Introduction
R
RETURN LOSS VS. VSWR
0
-10
-20
E
T
-30
U
R
N
dB
L
-40
O
S
S
-50
-60
-70
1.001 1.01 1.1 2.0
VSWR
LX Series, Rev. 0 1-13
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
The Innovator LX Series of
drivers/translators are complete 10W to
100W analog UHF translators that
operate at nominal visual output power
of 10 to 100 watts peak sync and an
aural output power of 1 to 10 watts at an
A/V ratio of 10dB, 10% sound or .5 to 5
watts at 13 dB, 5% sound.
Table 2-1: Innovator LX Series Translator Trays and Assemblies
IF Processor
Module
Chapter 2
System Description & Remote Control Connections
2.1 System Overview
The Innovator LX Series translator is
made up of a Receiver Tray and an
exciter amplifier chassis assembly. The
modules and assemblies that make up
the translator are listed in Table 2-1.
Controller/
Power Supply
Module
LO/Upconverter
Module
Receiver
Tray
ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME PART NUMBER
Power
Amplifier
Module
Receiver Tray 1265-1100
A3 IF Processor Module 1301938
A4
Control & Monitoring/Power
Supply Module
1301936
A5 LO/Upconverter Module 1301930
A6
Power Amplifier Module, 100
Watt Translator
1301923
A11 Backplane Board 1301941
A12 Switch Board 1527-1406
A20 LCD Display Board
LX Series, Rev. 0 2-1
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
2.1.1 8 Receiver Tray (1265-1100;
Appendix B)
The Receiver Tray receives a VHF or UHF
Channel input at Jack (J1) and converts it
to an internally diplexed Visual + Aural IF
Output (+0 dBm) at J4. The Visual +
Aural IF output of the Receiver Tray at J4
is fed to J6 the IF Input Jack of the
exciter.
RECEIVER
TRAY
INPUT LEVEL: -61 dBm to –16dBm
OUTPUT LEVEL: 0 dBm
POWER REQUIREMENTS: 110 or 220 VAC
Table 2-5. Receiver Samples
SAMPLE DESCRIPTION
Front panel sample – f (IF) Sample of the IF output
Front panel sample – f (s) Sample of the channel oscillator
Exciter Amplifier Chassis Assembly
All of the modules except the power
amplifier module and the power supply
section, located in the Control &
directly into a backplane board, which
provides module to module
interconnection as well as interconnection
to remote command and control
connectors.
Monitoring/Power Supply Module, plug
LX Series, Rev. 0 2-2
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
2.1.2 (A3) IF Processor Module
Assembly (1301938; Appendix B)
The (A3) IF Processor Assembly contains
the IF Processor Board (1301977). The IF
Processor provides pre-correction to
ensure broadcast quality output signal.
The pre-correction consists of amplitude
linearity correction, Incidental Carrier
Phase Modulation (ICPM) correction and
frequency response correction.
The IF Processor module is configured
either for an analog or digital system.
Pin 13C of the IF Processor module is
grounded in analog systems and left not
connected in digital systems. An IF
Processor Interlock signal is used to
report the presence of the IF Processor
module to the Control Monitoring board.
If the IF Processor interlock signal is not
present, the Innovator LX 100 Watt
Translator/Exciter Driver RF output is
Muted (turned off). If an analog IF
Processor module is installed and the
Modulation Present signal is not true,
the Innovator LX 100 Watt Translator /
Exciter Driver output is Muted (turned
off).
The Control & Monitoring/Power Supply
module uses the IF Processor module for
System output power control. Through
the front panel display or a remote
interface, an operator can set the
translator's RF output power. The range
of RF power adjustment is between 0%
(full off) and 105% (full power plus). A
front panel IF Processor module
potentiometer sets the upper limit of RF
power at 120%. The system's Control
Monitoring board compares the RF
Power Monitoring module RF power level
with the desired level and uses the IF
Power Control PWM line to correct for
errors.
In digital systems, a digital level control
(DLC) voltage is generated on the IF
Processor module and sent to an
external digital modulator (DT1C or
DT2B). RF power control is
implemented by changing the DLC
voltage provided to the external digital
modulator. The 'RF High' potentiometer
sets the upper adjusted range of RF
control circuit output to 120%.
The IF Processor module provides a
reference ALC voltage to the system's
Upconverter. When the ALC voltage
decreases, the Upconverter
automatically lowers the system output
power through the AGC circuits.
The IF Processor module has a front
panel switch to select Auto or Manual
ALC. When Manual ALC is selected, the
reference ALC voltage is set by a front
panel potentiometer. In this condition,
the RF power level control circuit is
removed from use. When the ALC select
switch is changed to Auto, the RF power
level control circuit will start at low
power and increase the RF output until
the desired output power is attained.
The IF Processor module Modulation
Present signal is monitored. If the
modulation level is too low or nonexistent, a Modulation Present fault is
reported to the Control Monitoring
board. When the controller detects this
fault, it can be set to Automatically Mute
the translator or in Manual mode the
translator will continue to operate at
25% output.
The IF Processor module Input Signal
level is monitored. If the signal level is
too low or non-existent, an Input fault is
LX Series, Rev. 0 2-3
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
reported on the Control Monitoring
board. When the IF Processor board
detects an Input Signal fault it
Table 2-6. IF Processor Front Panel Switch
SWITCH FUNCTION
When Manual ALC is selected, the reference ALC voltage is set
by the ALC Gain front panel potentiometer.
MAN/AUTO ALC
Table 2-7. IF Processor Front Panel Status Indicators
LED FUNCTION
INPUT FAULT (Red)
ALC Fault (Red)
MUTE (Red)
Table 2-8. IF Processor Front Panel Control Adjustments
POTENTIOMETERS DESCRIPTION
FREQUENCY
RESPONSE
EQUALIZER
ALC GAIN
MAN GAIN
LINEARITY
CORRECTION
Table 2-9. IF Processor Fr ont Pane l Sample
SMA CONNECTOR DESCRIPTION
IF SAMPLE Sample of the pre-corrected IF output of the IF Processor
When Auto ALC is selected, the IF level control circuit will
automatically increase the IF output until the desired output
power is attained.
When lit it indicates that there is a loss of the IF Input signal to the
IF Processor. Translator can be set to Mute on an IF Input Fault.
When lit it indicates that the required gain to produce the desired
output power level has exceeded the operational range of the ALC
circuit. The LED will also be lit when ALC is in Manual.
When lit it indicates that the IF input signal is cut back but the
enable to the Power Supply is present and the +32 VDC remains on.
These three variable resistors, R103, R106 & R274, adjust the
depth of gain for the three stages of frequency response correction.
Adjusts the gain of the translator when the translator is in the Auto
ALC position.
Adjusts the gain of the translator when the translator is in the
Manual ALC position.
These three variable resistors adjust the threshold cut in for the
three stages of linearity pre-correction. R211 and R216, the top
two pots, are adjusted to correct for in phase amplitude distortions.
R 231, the bottom pot, is adjusted to correct for quadrature phase
distortions.
automatically Mutes the translator. The
system controller does not Mute on an
IF Processor Input fault.
LX Series, Rev. 0 2-4
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
2.1.3 (A5) LO/Upconverter Module
Assembly, Digital (1301954;
Appendix B)
The (A5) LO/Upconverter Module
Assembly contains a front panel LED
display board (1303033), a UHF Filter
(1007-1101), a UHF Generator Board
(1585-1265) and a LO/Upconverter
Assembly (1303039). The
LO/Upconverter Assembly contains the
LO/Upconverter Board (1302132).
The Innovator LX Upconverter converts
an IF input signal to a RF output signal
on the desired channel frequency using
a high stability oven controlled oscillator
with very low phase noise and an
Automatic Level Control (ALC) for stable
output signal level.
Several control voltages are used for
translator power control. Automatic
gain control (AGC) circuits set the RF
output level of the translator system.
AGC #1 is provided by the 50 Watt
Translator/Exciter Driver Power Amplifier
module. This voltage is used by the
Upconverter to maintain a constant RF
output level at the Power Amplifier
module output. If this voltage exceeds
0.9 VDC, the system is in an over-drive
condition. The 0.9 VDC over-driver
threshold is set by a front panel
Upconverter module potentiometer.
When an over-drive condition is
detected, the Upconverter module
reduces its RF output level. For values
less than 0.9 VDC, the Upconverter uses
the AGC #1 voltage for automatic gain
control by setting it's RF output to
maintain AGC #1 equal to the AGC
voltage set by another front panel
potentiometer. When the Upconverter is
set for manual gain, the RF output of the
Upconverter is set by the front panel
AGC potentiometer. In manual gain
operation, the AGC #1 feedback voltage
from the PA is not used to adjust the RF
level unless an over-drive condition is
detected.
AGC #2 is provided by each of the
optional external amplifier modules.
Diodes are used in each of the external
amplifier forward power circuits to
capture the highest detected sample
voltage. This voltage is used by the
Upconverter to maintain a constant RF
output of the system. As with AGC #1,
the Upconverter module reduces its RF
output level if AGC #2 is too high. AGC
#1 and ACG #2 are diode ORed together
in the Upconverter gain circuit. Both
AGC voltages are first reduced by an onboard potentiometer before being
amplified. If an over-drive condition
does not exist, the higher of the two
AGC voltages is used to control the
Upconverter gain circuit.
An AFC Voltage is generated to control
the VCXO of the UHF Generator portion
of the Upconverter module. The typical
AFC voltage is 1.5 VDC but it can be as
high as +5 VDC.
The Upconverter can operate on either
it's internal 10 MHz source or on a 10
MHz external reference signal. When an
external 10 MHz source is present on
J10, it is automatically selected. An
external reference present signal is
provided to the controller for display
purposes. The selected 10 MHz signal
from the Upconverter is buffered then
sent to the backplane on two ports. One
LX Series, Rev. 0 2-5
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
port is sent to the Modulator module, if
present, and the other is routed to a
BNC connector (J11) on the backplane
for a system 10 MHz output signal.
A National Semiconductor frequency
synthesizer IC is used in the frequency
conversion of the IF signal to a RF
signal. The frequency synthesizer IC
uses a 10MHz reference frequency for
signal conversion. Typically the IF input
frequency is 45.75 MHz for analog
system and 44 MHz for DTV. To obtain
different output RF frequencies, the
synthesizer IC is serial programmed by
the Control Monitoring board. The part
is programmed to use a 5 kHz phase
detection frequency. With a 10 MHz
input signal, the R counter is set to
2000. With these settings the N counter
is set to the desired LO frequency in kHz
Table 2-10. LO/Upconverter Fr ont Panel Switc h
SWITCH FUNCTION
When Manual AGC is selected, the reference AGC voltage is
set by the AGC Manual Gain front panel potentiometer.
MAN/AUTO AGC
Table 2-11. LO/Upconverte r Fr ont Pane l Status Indic ator
LED FUNCTION
AGC CUTBACK
(Red)
Table 2-12. LO/Upconver ter Fr ont Pane l Co ntr ol Adjus tments
POTENTIOMETERS DESCRIPTION
MAN GAIN ADJ
AGC CUTBACK ADJ
(AGC OVERRIDE)
Table 2-13. LO/Upconverter Fr ont Panel Sample s
SMA CONNECTOR DESCRIPTION
LO SAMPLE
RF SAMPLE Sample of the On Channel RF Output of the Upconverter
When Auto AGC is selected, the RF power level control circuit
will automatically increase the RF output until the desired
output power is attained.
When lit it indicates that the required gain to produce the desired
output power level has exceeded the level set by the AGC Cutback
(Override) adjust. Translator will cut back power to 25%
Adjusts the gain of the translator when the translator is in the
Manual AGC position.
Adjusts the point at which the translator will cut back in power
when the Translator is in the Auto AGC position.
Sample of the LO signal to the Upconverter as generated by the
UHF Generator Board.
/ 5 kHz. The maximum LO frequency
setting with these parameters is
1310.715 MHz.
Example:
For a Frequency RF Out = 517.125 MHz,
N = 517125 kHz / 5 kHz = 103425
An Upconverter PLL Lock indicator is
used to insure that the frequency control
circuits are operating properly. When
the Upconverter PLL is locked, the
frequency synthesizer IC is programmed
and the Power Amplifier module(s) can
be enabled.
The RF output of the LO/Upconverter
Module is at J23 on the rear chassis.
LX Series, Rev. 0 2-6
Analog UHF Driver/Translator Chapter 2, System Description &
A4 A
Remote Control Co nnections
2.1.4 (A4) Control & Monitoring/
Power Supply Module Assembly
(1301936; Appendix B)
The (A4) Control & Monitoring/Power
Supply Assembly is made up of a Control
Board (1302021), a Power Protection
Board (1302837) and a Switch Board
(1527-1406). The Assembly also
contains a switching power supply that
provides ±12 VDC to the rest of the
modules in the chassis and +32 VDC to
the Power Amplifier module.
The Assembly provides all translator
control and monitoring functions. The
Front panel LCD allows monitoring of
system parameters, including forward
and reflected power, transistor currents,
module temperatures and power supply
voltages.
8
Table 2-14. Controller/Power Supply Display
DISPLAY FUNCTION
A 4 x 20 display providing a four-line readout of the internal
LCD
functions, external inputs, and status. See Chapter 3,
Controller/Power Supply Display Screens, for a listing of displays.
Table 2-15. Controller/Power Supply Status Indicator
LED FUNCTION
OPERATE
( green )
FAULT
( red or green )
DC OK
( red or green )
When lit it indicates that the translator is in the Operate Mode. If
translator is Muted the Operate LED will stay lit, the translator will
remain in Operate, until the input signal is returned.
Red indicates that a problem has occurred in the translator. The
translator will be Muted or placed in Standby until the problem is
corrected.
Green indicates that the switchable fuse protected DC outputs that
connect to the modules in the translator are OK.
Table 2-16. Controller/Power Supply Control Adjustments
POTENTIOMETERS DESCRIPTION
DISPLAY CONTRAST Adjusts the contrast of the display for desired viewing of screen.
LX Series, Rev. 0 2-7
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
2.1.5 (A6) Power Amplifier Module
Assembly, Exciter, 5W-50W
Translator (1301923; Appendix B)
The (A6) Power Amplifier Module
Assembly is made up of a Coupler Board
Assembly (1301949), an Amplifier
Control Board (1301962), a 1 Watt
Module Assembly (1302891), a TFS 40W
UHF Module (1206693) and a RF Module
Pallet, Philips (1300116).
The Power Amplifier Module contains
Broadband LDMOS amplifiers that cover
the entire UHF band with no tuning
required. They amplify the RF to the
10W to 50W output power level of the
translator.
The Power Amplifier of the
Translator/Exciter Driver is used to
amplify the RF output of the
Upconverter module. A cable, located on
the rear chassis, connects the RF output
from the LO/Upconverter at J23 to J24
the RF input to the PA Assembly. This
module contains RF monitoring circuitry
for both an analog and a digital system.
Control and monitoring lines to the
Power Amplifier module are routed
through the floating blind-mate
connector of the Control &
Monitoring/Power Supply module.
The 50 Watt Translator/Exciter Driver
Power Amplifier module and any
External Amplifier modules contain the
same control and monitoring board.
This board monitors RF output power,
RF reflected power, the current draw of
amplifier sections, the supply voltage,
and the temperature of the PA heat sink.
The RF power detector circuit outputs
vary with operating frequency. These
circuits must be calibrated at their
intended operating frequency. Front
panel adjustment potentiometers are
used to calibrate the following:
Table 1: Power Amplifier Calibration
Adjustments in Analog Systems
R201 Reflected Power Cal
R202 Visual / Forward Power Cal
R203 Aural Power Cal
R204 Visual Offset Zero
R205 Aural Null
In analog systems, the Aural power of
an Exciter Driver Power Amplifier and
the Aural power of any external
amplifier will not be reported by the
system Control Monitoring module.
Additionally the Visual power of these
amplifiers, is reported as Forward Power
just like in digital systems. In analog
systems, aural and visual power will only
be reported for the final system RF
output.
In digital systems, the Forward power of
an Exciter Driver Power Amplifier and
the Forward power of any external
amplifier, is reported by the system
Control Monitoring module.
If the Control Monitoring module is
monitoring a 5-50 Watt Translator,
system power is measured in the Power
Amplifier module. The wired
connections are transferred through the
power supply connector to the
backplane board on a five position
header. All four positions of control
board switch SW1 must be set on to
LX Series, Rev. 0 2-8
Analog UHF Driver/Translator Chapter 2, System Description &
Remote Control Co nnections
route these lines as the system's RF
power signals. In systems of output
power greater than 50 Watts, system
power is monitored by an external
module that is connected to TB31 and
control board SW1 switches must be set
off.
The Forward Power of the
Translator/Exciter Driver Power Amplifier
Table 2-17. Power Amplifier Status Indicator
LED FUNCTION
ENABLED
(Green)
DC OK
(Green)
TEMP
(GREEN)
MOD OK
(Green)
Table 2-18. Power Amplifier Control Adjus tments
POTENTIOMETERS DESCRIPTION
RFL CAL Adjusts the gain of the Reflected Power monitoring circuit
VISUAL CAL Adjusts the gain of the Visual / Forward Power monitoring circuit
AURAL CAL Adjusts the gain of the Aural Power monitoring circuit
VISUAL ZERO Adjusts the offset of the Forward Power monitoring circuit
AURAL NULL
Table 2-19. Power Amplifier Sample
DISPLAY FUNCTION
FWD SAMPLE RF sample of the amplified signal being sent out the module on J25.
2.1.6 RF Output Assemblies
Modulated IF from the Receiver Tray
connects to the rear of the Innovator LX
chassis assembly at J6, Modulated IF
Input. The power amplifiers RF output
jack is at a “N” connector J25, PA RF
Output.
The RF output of the PA module is
connected to a band-pass and trap filter
and then to an output coupler assembly.
The coupler assembly provides a forward
When lit Green, it indicates that the PA is in the Operate Mode. If a
Mute occurs, the PA will remain Enabled, until the input signal is
returned.
When lit Green, it indicates that the fuse protected DC inputs to the
PA module are OK.
When lit Green, it indicates that the temperature of the heatsink
assembly in the module is below 78ûC.
When lit Green, it indicates that the PA Module is operating and has
no faults.
Adjusts the offset of the Forward Power monitoring circuit based on
the Aural signal level..
module is routed to the Upconverter
module as AGC #1. A system overdrive condition is detected when this
value rises above 0.9 VDC. When an
over-drive condition is detected, the
Upconverter module reduces its RF
output level. For values less than 0.9
VDC, the Upconverter uses this voltage
for automatic gain.
and a reflected power sample for test
purposes.
2.2 Control and Status
The control and status of the
exciter/amplifier Chassis assembly is
found by operating the front panel
display screens. Detailed information on
the use of the screens is found in chapter
3.
LX Series, Rev. 0 2-9
Loading...