UBS Axcera CHV400BTD 400-Watt High-Band VHF Digital Transmitter User Manual

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Technical Manual
Innovator,
CHV400BTD,
ATSC VHF High Band Transmitter
Axcera, LLC
103 Freedom Drive, P.O. Box 525, Lawrence, PA 15055-0525, USA
PHONE: 724-873-8100 • FAX: 724-873-8105
www.axcera.com • info@axcera.com
RESTRICTIONS ON USE, DUPLICATION OR DISCLOSURE
OF PROPRIETARY INFORMATION
This document contains information proprietary to Axcera, to its affiliates or to a third party to
which Axcera may have a legal obligation to protect such information from unauthorized
disclosure, use or duplication. Any disclosure, use or duplication of this document or any of the
information herein for other than the specific purpose for which it was disclosed by Axcera is
expressly prohibited, except as Axcera may otherwise agree in writing. Recipient by accepting this
document agrees to the above stated conditional use of this document and this information
disclosed herein.
Copyright © 2010, Axcera
Innovator CHV400BTD ATSC Transmitter
Table of Contents
Table of Contents
Introduction ......................................................................................................1
Manual Overview ............................................................................................1
Assembly Designators .....................................................................................1
Safety ...........................................................................................................1
Contact Information........................................................................................3
Return Material Procedure ...............................................................................3
Limited One Year Warranty for Axcera Products..................................................4
Unpacking and Installation ................................................................................ 11
Unpacking ................................................................................................... 11
Installation .................................................................................................. 11
Tray Slide Installation ................................................................................ 12
AC Input Connections ....................................................................................... 13
Input and Output Connections ........................................................................... 14
Initial On Site Turn On Procedure....................................................................... 17
Typical System Operating Parameters ................................................................ 18
Typical Problems, Indications and Causes in CHV200B Tray................................... 19
LCD Display and Front Panel LED Indicators ........................................................ 19
System Remote Connections ............................................................................. 21
LCD Front Panel Screens................................................................................... 22
Operation Screens ........................................................................................ 24
Set Up Screens ............................................................................................ 31
System Description .......................................................................................... 37
(Optional) Innovator CHVB Series Web Ethernet Interface .................................... 41
(Optional) Innovator CHVB Series SNMP Ethernet Interface................................... 47
Circuit Descriptions of Boards in the CHV200B System ......................................... 49
(A1) 8 VSB Demodulator Board (1308275) - Only used with BRD operation ......... 49
Overview.................................................................................................. 49
Microcontroller Functions............................................................................ 49
Jumper and DIP Switch Settings.................................................................. 49
(A2) Digital Modulator Board (1304883), Part of the Digital Modulator ................ 50
w/Power Conditioner (1309629) ..................................................................... 50
SMPTE-310 Input ...................................................................................... 50
Channel Coder .......................................................................................... 50
Analog Output Section ............................................................................... 50
Pilot Frequency Generation......................................................................... 50
Voltage Requirements................................................................................ 51
(A3) IF Pre-Corrector Board (1308796) ........................................................... 51
Pin-Diode Attenuator Circuit ........................................................................ 52
In Phase and Quadrature Corrector Circuits .................................................. 52
Frequency Response Corrector Circuit .......................................................... 53
ALC Circuit ............................................................................................... 53
Input Fault and Modulation Fault Circuitry .................................................... 54
±12 VDC, +6.8 VDC, and VREF needed to operate the Board ......................... 55
(A4) Frequency Agile Upconverter Board (1309695) ......................................... 55
(A5) ALC Board, Innovator CX Series (1308570) .............................................. 56
(A6) Amplifier Assembly (1313959) – Used in the CHV20B Tray ......................... 57
(A6-A1) VHF HB Pre-Driver Assembly (1313899) .......................................... 57
(A6-A2) 50 Watt Amplifier Pallet, Italmec (1313484) ..................................... 58
(A6) 200 Watt Driver Amplifier Assembly (1313912) – Used in the CHV200B ....... 58
(A6-A1) 50 Watt Amplifier Pallet, Italmec (1313484) ..................................... 58
(A6-A2) 500 Watt Amplifier Pallet, Italmec (1313581) ................................... 58
(A7) Output Metering Detector Board (1313747) .............................................. 58
(A8) Control Card, Innovator CX (1312543) ..................................................... 59
Technical Manual, Rev. 0
January 7, 2010
Innovator CHV400BTD ATSC Transmitter
Table of Contents
(A9 & A10) Power Supplies used in CHV20B, CHV200B, and Driver for CHV400B &
higher power ............................................................................................... 59
Circuit Description of External System Metering Board which is only used in
Transmitters with multiple external Amplifier Trays .............................................. 60
(A5) System Metering Board (1312666) .......................................................... 60
Circuit Descriptions of Boards in the CHV400, 400 Watt ATSC Amplifier Tray ........... 61
(A7) Amplifier Control Board (1312260) .......................................................... 61
(A10) Current Metering Board (1309130) ........................................................ 61
(A5) 2 Way Splitter Board (1313941), in CHV400B ........................................... 62
(A2 & A3) 500 Watt Amplifier Pallets (1313581) ............................................... 62
(A6) 2 Way Combiner Board (1313969), in CHV400B ........................................ 62
(A8 & A9) CHV400B, 500 Watt, 750 Watt and 1000 Watt Amplifier Tray Power
Supplies ...................................................................................................... 62
(Optional) ASI to S310 Converter Module ........................................................... 63
ASI Motherboard (1311179) ....................................................................... 63
ASI to 310 Conversion Board, Non-SFN (1311219) ......................................... 63
ASI to 310 Conversion Board, SFN (1309764)................................................ 64
System Set Up Procedure ................................................................................. 65
Set Up of the LO1 and LO2 Samples on Upconverter Board ................................ 65
Set Up of the IF Precorrector Board in the System ............................................ 66
ALC Board Set-Up, Forward and Reflected Power Calibration for CHV200B Systems
.................................................................................................................. 67
Forward and Reflected Power Calibration of CHV400B and Higher Power Systems
with one or more External Amplifier Trays ....................................................... 68
Linearity Correction Adjustment (Non-Linear Distortions) .................................. 70
Linearity Correction Adjustment (Linear Distortions) ......................................... 71
APPENDIX A
Innovator,
CHV400BTD..........................................................................................................1
Innovator CHV400BTD Transmitter System
Drawing List .........................................................................................................1
APPENDIX B
Innovator,
CHV20BTD, ..........................................................................................................1
Innovator CXB Series Transmitter
CHV20BTD Driver Tray,
Subassemblies & Boards Drawing List ......................................................................1
APPENDIX C
Innovator,
CHV400B, ............................................................................................................1
Innovator CXB Series Transmitter
CHV400B Amplifier Tray,
Subassemblies & Boards Drawing List ......................................................................1
Technical Manual, Rev. 0
ii
January 7, 2010
Innovator CHV400BTD ATSC Transmitter
Introduction
Introduction
Manual Overview
This manual contains the description of the Innovator CHV400BTD ATSC Transmitter and
the circuit descriptions of the boards, which make up the system. The manual also
describes the installation, setup and alignment procedures for the system.
Appendix A of this manual contains the system level drawings and parts lists for the
Innovator CHV400BTD ATSC Transmitter System. Appendix B contains the Tray,
subassemblies and boards drawings and parts lists for the CHV200BTD Driver Tray.
Appendix C contains the Tray, subassemblies and boards drawings and parts lists for
the CHV400B Amplifier Tray. NOTE: Information and drawings on the Axciter, if part of
your system, are contained in the separate Axciter Instruction Manual.
Assembly Designators
Axcera has assigned assembly numbers, Ax designations such as A1, where x=1,2,3…etc,
to all assemblies, modules, and boards in the system. These designations are referenced
in the text of this manual and shown on the block diagram and interconnect drawings
provided in Appendix A.
The cables that connect between the boards within a tray or assembly and that connect
between the trays, racks and cabinets are labeled using markers. Figure 1 is an
example of a marked cable. There may be as few as two or as many as four Markers on
any one cable. These markers are read starting farthest from the connector. If there
are four Markers, the marker farthest from the connector is the system number such as
system 1 or transmitter 2. The next or the farthest Marker is the rack or cabinet “A”
number on an interconnect cable or the board “A” number when the cable is within a
tray. The next number on an interconnect cable is the Tray location or Board “A”
number. The marker closest to the connector is the jack or connector “J” number on an
interconnect cable or the jack or connector “J” number on the board when the cable is
within a tray.
Marker Identification Drawing
Safety
The Innovator CHV400BTD ATSC Transmitter systems manufactured by Axcera are
designed to be easy to use and repair while providing protection from electrical and
mechanical hazards. Please review the following warnings and familiarize yourself with
the operation and servicing procedures before working on the system.
Hazardous Accessibility – Axcera has made attempts to provide appropriate
connectors, wiring and shields to minimize hazardous accessibility.
Circuit Breakers and Wiring – All circuit breakers and wire are UL and CE certified and
are rated for maximum operating conditions.
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
Introduction
Single Point Breaker or Disconnect - The customer should provide a single point
breaker or disconnect at the breaker box for the main AC input connection to the
transmitter.
Transmitter Ratings - The transmitter ratings are provided in the text of this manual
along with voltage and current values for the equipment.
Protective Earthing Terminal – A main protective earthing terminal is provided for
equipment required to have protective earthing.
Read All safety Instructions – All of the safety instructions should be read and
understood before operating this equipment.
Retain Manuals – The manuals for the system should be retained at the system site for
future reference. Axcera provides two manuals for this purpose; one manual can be left
at the office while the other 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 Operating Instructions – All of the operating and use instructions for the
system should be followed.
Cleaning – Unplug or otherwise disconnect all power from the equipment before cleaning.
Do not use liquid or aerosol cleaners. Use only a damp cloth for cleaning.
Ventilation – Openings in the cabinet and module front panels are provided for
ventilation. To ensure the reliable operation of the system, 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.
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
Introduction
Contact Information
The Axcera Field Service Department can be contacted by PHONE at 724-873-8100 or by
FAX at 724-873-8105.
Before calling Axcera, please be prepared to supply the Axcera technician with answers to
the following questions. This will save time and help ensure the most direct resolution to
the problem.
1.
2.
3.
4.
What are your Name and the Call Letters for the station?
What are the model number and type of system?
Is the system digital or analog?
How long has the system been on the air? (Approximately when was the system
installed?)
5. What are the symptoms being exhibited by the system? Include the current front
panel LCD readings and what the status LED is indicating on the front panel of
the tray. If possible, include the LCD readings before the problem occurred.
Return Material 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 Return Material
Authorization Number (RMA#). The RMA# 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, the RMA# is included with the unit. The RMA#
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 the RMA# to allow for the proper routing of the
exchanged hardware. Failure to close out this type of RMA# will normally result in the
customer being invoiced for the value of the loaner item or the exchanged assembly.
When shipping an item to Axcera, please include the RMA# on the packing list and on the
shipping container. The packing slip should also include contact information and a brief
description of why the unit is being returned.
Please forward all RMA 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
at 724-873-8100.
Axcera can also be contacted through e-mail at info@axcera.com and on the Web at
www.axcera.com.
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
Introduction
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 warranty shall not apply to tubes, fuses, batteries,
bulbs or LEDs.
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 alteration. 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.
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
Introduction

 WARNING!!!
 HIGH VOLTAGE 
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 TRANSMITTER SYSTEM WITHOUT A
PROPERLY MATCHED RF ENERGY ABSORBING LOAD OR THE ANTENNA
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.
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
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.
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
SKIN REDDENED: Apply ice cold water to
burned area to prevent burn from going
deeper into skin tissue. Cover area with a
clean sheet or cloth to keep away air. Consult
a physician.
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.
SKIN BLISTERED OR FLESH CHARRED:
Apply ice cold water to burned area to
prevent burn from going deeper into skin
tissue.
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
Introduction
dBm, dBw, dBmV, dBµ
µV, & VOLTAGE
EXPRESSED IN WATTS
50 Ohm System
WATTS
1,000,000,000,000
100,000,000,000
10,000,000,000
1,000,000,000
100,000,000
10,000,000
1,000,000
100,000
10,000
1,000
100
50
20
10
0.1
0.01
0.001
0.0001
0.00001
0.000001
0.0000001
0.00000001
0.000000001
0.0000000001
0.00000000001
0.000000000001
PREFIX
1 TERAWATT
100 GIGAWATTS
10 GIGAWATTS
1 GIGAWATT
100 MEGAWATTS
10 MEGAWATTS
1 MEGAWATT
100 KILOWATTS
10 KILOWATTS
1 KILOWATT
1 HECTROWATT
1 DECAWATT
1 WATT
1 DECIWATT
1 CENTIWATT
1 MILLIWATT
100 MICROWATTS
10 MICROWATTS
1 MICROWATT
100 NANOWATTS
10 NANOWATTS
1 NANOWATT
100 PICOWATTS
10 PICOWATTS
1 PICOWATT
dBm
+150
+140
+130
+120
+110
+100
+ 90
+ 80
+ 70
+ 60
+ 50
+ 47
+ 43
+ 40
+ 30
+ 20
+ 10
- 10
- 20
- 30
- 40
- 50
- 60
- 70
- 80
- 90
dBw
+120
+110
+100
+ 99
+ 80
+ 70
+ 60
+ 50
+ 40
+ 30
+ 20
+ 17
+ 13
+ 10
- 10
- 20
- 30
- 40
- 50
- 60
- 70
- 80
- 90
-100
-110
-120
dBmV
dBµV
VOLTAGE
+137
+127
+117
+107
7.07V
2.24V
0.707V
224mV
TEMPERATURE CONVERSION
°F = 32 + [(9/5) °C]
°C = [(5/9) (°°F - 32)]
Technical Manual, Rev. 0
77
67
57
47
Innovator CHV400BTD ATSC Transmitter
Introduction
USEFUL CONVERSION FACTORS
TO CONVERT FROM
TO
MULTIPLY BY
mile (US statute)
kilometer (km)
inch (in)
millimeter (mm)
inch (in)
centimeter (cm)
inch (in)
meter (m)
foot (ft)
meter (m)
yard (yd)
meter (m)
mile per hour (mph)
kilometer per hour(km/hr)
mile per hour (mph)
meter per second (m/s)
pound (lb)
kilogram (kg)
gallon (gal)
liter
U.S. liquid
(One U.S. gallon equals 0.8327 Canadian gallon)
fluid ounce (fl oz)
milliliters (ml)
British Thermal Unit
watt (W)
horsepower (hp)
watt (W)
1.609347
25.4
2.54
0.0254
0.3048
0.9144
1.60934
0.44704
0.4535924
3.7854118
29.57353
0.2930711
per hour (Btu/hr)
746
NOMENCLATURE OF FREQUENCY BANDS
FREQUENCY RANGE
DESIGNATION
3 to 30 kHz
30 to 300 kHz
300 to 3000 kHz
3 to 30 MHz
30 to 300 MHz
300 to 3000 MHz
3 to 30 GHz
30 to 300 GHz
VLF
LF
MF
HF
VHF
UHF
SHF
EHF
Very Low Frequency
Low Frequency
Medium Frequency
High Frequency
Very High Frequency
Ultrahigh Frequency
Superhigh Frequency
Extremely High Frequency
LETTER DESIGNATIONS FOR UPPER FREQUENCY BANDS
LETTER
FREQ. BAND
Ku
Ka
1000 - 2000 MHz
2000 - 4000 MHz
4000 - 8000 MHz
8000 - 12000 MHz
12 - 18 GHz
18 - 27 GHz
27 - 40 GHz
40 - 75 GHz
75 - 110 GHz
Technical Manual, Rev. 0
Innovator CHV400BTD ATSC Transmitter
Introduction
RETURN LOSS VS. VSWR
-10
-20
-30
dB
-40
-50
-60
-70
1.001
1.01
1.1
VSWR
Technical Manual, Rev. 0
2.0
Innovator CHV400BTD ATSC Transmitter
Introduction
ABBREVIATIONS/ACRONYMS
AC
Alternating Current
dBmV
Decibel referenced to
1 millivolt
AFC
Automatic Frequency
Control
dBw
Decibel referenced to 1 watt
ALC
Automatic Level Control
FEC
Forward Error Correction
AM
Amplitude Modulation
FM
Frequency Modulation
AGC
Automatic Gain Control
FPGA
Field Programmable Gate
Array
ARD
A-line, Regenerative
Translator, Digital
Hz
Hertz
ATD
A-line, Transmitter,
Digital
ICPM
Incidental Carrier Phase
Modulation
ATSC
Advanced Television
Systems Committee (Digital)
I/P
Input
IF
Intermediate Frequency
AWG
American Wire Gauge
LED
Light emitting diode
BER
Bit Error Rate
LSB
Lower Sideband
BRD
B-line, Regenerative
Translator, Digital
BTD
B-line, Transmitter,
Digital
BW
Bandwidth
COFDM Coded Orthogonal Frequency
Division Multiplexing
modulation scheme
DC
Direct Current
D/A
Digital to Analog
DSP
Digital Signal Processing
DTV
Digital Television
dB
Decibel
dBm
Decibel referenced to
1 milliwatt
Technical Manual, Rev. 0
LDMOS Lateral Diffused Metal Oxide
Semiconductor Field Effect
Transistor
MPEG
Motion Pictures Expert
Group
NTSC
National Television
Systems Committee (Analog)
O/P
Output
PLL
Phase Locked Loop
PCB
Printed Circuit Board
QAM
Quadrature Amplitude
Modulation
SMPTE Society of Motion Picture
and Television Engineers
VSB
10
Vestigial Side Band
Innovator CHV400BTD ATSC Transmitter
Unpacking and Installation
Unpacking and Installation
Unpacking
Axcera certifies that upon leaving our facility all equipment was undamaged and in proper
working order. It is imperative that all packages be inspected immediately upon arrival to
verify that no damage occurred in transit to the site. Inspect all packages for exterior
damage and make note of any dents, broken seals, or other indications of improper
handling. Carefully open each package and inspect the contents for damage. Verify that all
materials are enclosed as listed on the packing slip. Report any shortages to Axcera. In the
event any in transit damage is discovered, report it to the carrier. Axcera is not responsible
for damage caused by the carrier. If the equipment is not going to be installed
immediately, return all items to their original packaging for safe storage. Save all packing
material for future use. If equipment is ever removed from the site, the original packaging
will ensure its safe transport.
The (Optional) UPS is
located behind this blank
panel
A1
Exciter/Driver
A2
Power Amplifier
A3
Power Amplifier
Figure 1: CHV1000BTD Front View Typical Racking Plan
Installation
The Innovator CXB Series transmitters are designed for simple installation. Expensive test
equipment is not required for installation and set up and to keep a system operational. An
information decal, with Voltage Range, Current Range, Manufacturer, Model and ratings is
attached to the rear panel of the stand alone tray or if mounted in a cabinet, to the top of
the frame above the door facing the rear of the cabinet. Prior to installing the product,
review the following items. Check that they been installed, tested and/or inspected.
Building Structure
Electrical Systems
Heating and Air Conditioning
Receive Antenna or Satellite Dish and input cabling
Optional ASI to S310 Converter, if needed
Transmit Antenna and output transmission line
Technical Manual, Rev. 0
11
Innovator CHV400BTD ATSC Transmitter
Unpacking and Installation
The Innovator CXB Series systems are 17” (43.2cm) wide standard rack mountable trays.
They are supplied with side mounted Tray Slides for ease of installation and removal. The
CHV200 system is 3 RU, 5.25” (13.3cm), high. The CHV400 and CHV500 systems are 9 RU,
15.75” (40cm) high, which is 3 RU, 5.25” (13.3cm) for the driver and 6 RU, 10.5” (26.7cm)
for the 400 watt Innovator CHVB Series amplifier tray. The CHV1000 systems are 15 RU,
26.25” (66.7cm) high, which is 3 RU, 5.25” (13.3cm) for the driver and 12 RU, 21” (53.4cm)
for the two Innovator CHVB Series amplifier trays. The CHV1500 systems are 15 RU, 26.25”
(66.7cm) high, which is 3 RU, 5.25” (13.3cm) for the driver and 12 RU, 21” (53.4cm) for the
two Innovator CHVB Series amplifier trays. The CHV2000 systems are 21 RU, 36.75”
(93.3cm) high, which is 3 RU, 5.25” (13.3cm) for the driver and 18 RU, 31.5” (80cm) for the
three Innovator CHVB Series amplifier trays. The CHV3000 systems are 27 RU, 47.25”
(120cm) high, which is 3 RU, 5.25” (13.3cm) for the driver and 24 RU, 42” (106.7cm) for the
four Innovator CHVB Series amplifier trays. In all the systems just described, if the Axciter
is also part of the system, another 3 RU, 5.25” (13.3cm) must be added to the rack space
for the Axciter tray.
Also needed for FCC compliance operation is an ATSC filter on the broadcast channel that
connects to the output of the CHV200 thru CHV3000 systems. Space must be provided for
the ATSC filter, and in some systems, for the circulator, splitter, combiner, reject load, and
low pass filter, whose dimensions will vary depending on manufacturer and channel. Refer
to the vendor supplied information included with your ATSC filter and low pass filter for
specific dimensions. Make sure that the space provided for the CX Series equipment is
sufficient and includes the circulator, splitters, combiners, reject load and external filters.
Check that any additional equipment, which is included in the system that extends above or
to the side of the mounting rack, has sufficient clearance space. Refer to the custom
racking plan for the system, if prepared, for detailed information.
Tray Slide Installation
If the system is pre-mounted in a cabinet skip this section. Locate the tray slides included in
the installation material for your system. See Figure 2 and the manufacturers instructions,
included with the tray slides, for the cabinet mounting instructions of the tray slides. Install
the left tray slide into the left side of the cabinet (as viewed from the rear). Allow 3 RU, 5.25”
(13.3cm) of space between the trays for a CHV200B system. In high power systems, allow a
space of 3 RU, 5.25” (13.3cm) for the driver and 6 RU, 10.5” (26.7cm) for each of the
Innovator CHVB Series amplifier trays in higher power systems. Space must also be
provided for the splitter, combiner, ATSC filter and low pass filter, if present, whose
dimensions will vary depending on the manufacturer and the output channel. Secure the
left tray slide by connecting it to the front and rear mounting bars using No. 10 screws and
the bar nuts that have been provided. Install the tray slide on the right side of the cabinet
(as viewed from the rear) making sure that it is aligned with the tray slide on the left side.
Secure the slide by connecting it to the front and rear mounting bars using No. 10 screws and
the bar nuts that have been provided. Repeat this process for any other trays if purchased.
With both slides in place, slide the tray or trays into the cabinet.
Figure 2: Cabinet Slides
Technical Manual, Rev. 0
12
Innovator CHV400BTD ATSC Transmitter
Unpacking and Installation
AC Input Connections
The CHV200B single tray systems will operate with an input voltage of 185-253VAC. The
customer should provide a single point disconnect for the main AC input connection to the
transmitter. Check that the AC switch, located on the rear of the tray above the AC power
jack, is OFF. Connect the AC power cord supplied with the tray from J6 on the rear of the
tray to the AC source. If your system has the optional ASI to S310 Converter, check that it
is connected to the AC source.
If your system is a CHV400B or CHV500B, it also contains one amplifier tray. In CHV1000
and higher power systems, multiple amplifier trays are included. Each amplifier tray is
configured for 230 VAC operation only. Check that the ON/OFF circuit breaker or circuit
breakers in the amplifier, located on the rear panel on either side of the AC power jack, are
OFF. Connect the AC power cord supplied with the tray from J10 on the rear of the tray to
the 230 VAC source. Refer to Table 1 for the typical voltage and current requirements for
CHVB Systems.
If the system is mounted in a rack, an AC distribution box wired to a quad receptacle box is
used to connect the AC to the individual trays. The AC distribution box is mounted on the
upper right side of the rack accessed through the back of the rack. The main AC input for a
CHXBTD transmitter is, 195-235VAC, at least 10Amps, 50/60Hz. The customer should
provide a single point disconnect for the main AC input that connects to the transmitter. The
AC input lines connect inside the AC distribution box by first removing the two screws that
hold the cover plate to the front of the AC distribution box. Then connect the three wire main
AC input to the input lugs, L1 to L1, L2 to L2 and Ground to Ground. The power amplifier tray
and the quad receptacle box connect through AC power cords directly to the AC distribution
box. The AC power to the optional receiver tray and the exciter/driver tray are connected
through AC power cords that plug into the quad receptacle box.
If the system is mounted in a cabinet, an AC distribution panel is supplied to connect the AC
to the individual trays. The AC distribution panel is mounted facing the rear of the cabinet
and accessed through the back of the cabinet. The main AC input for a CHV1000BTD
transmitter is, 195-235VAC, at least 30Amps, 50/60Hz. The customer should provide a single
point disconnect for the main AC input that connects to the transmitter. The AC input lines
connect to the AC distribution panel by first removing the four #8 screws that hold the cover
plate to the front of the AC distribution panel. Then connect the three wire main AC input to
the input lugs located at the top left of the AC distribution panel, L1 to L1, L2 to L2 and
Ground to the Ground lug on the left. The AC distribution panel in a CHV1000BTD has three
circuit breakers that distribute the AC to the individual trays, which are the Exciter and the
two power amplifier trays. The circuit breakers, which are accessed through the rear door of
the cabinet, supply the AC though AC line cords, that connect to the AC input jacks mounted
on the rear panels of the trays. CB1 is a 30 Amp circuit breaker which supplies the AC to the
(A2), top, Power Amplifier A tray. CB2 is a 30 Amp circuit breaker which supplies the AC to
the (A3), bottom, Power Amplifier B tray. CB3 is a 10 Amp circuit breaker which supplies the
AC to the (A1) Exciter/Driver tray. A maximum of four 30 Amp circuit breakers for four
amplifier trays and two 10 Amp circuit breakers for two Exciter/Driver trays can be installed in
the AC Distribution Panel.
Table 1: CXB Series Digital Systems Typical AC Input and Current Requirements.
Power
System
O/P Power
Voltage
Current
Consumption
CHV200B
200 Watts
1000 Watts
230 VAC
4.4 Amps to the Cabinet
CHV400B
400 Watts
2200 Watts
230 VAC
9.6 Amps to the Cabinet
CHV500B
500 Watts
2700 Watts
230 VAC
11.8 Amps to the Cabinet
Technical Manual, Rev. 0
13
Innovator CHV400BTD ATSC Transmitter
CHV1000B
CHV1500B
CHV2000B
CHV3000B
1000
1500
2000
3000
Watts
Watts
Watts
Watts
Unpacking and Installation
5100 Watts
7200 Watts
10000 Watts
14700 Watts
230
230
230
230
VAC
VAC
VAC
VAC
22.2
31.3
43.5
63.9
Amps
Amps
Amps
Amps
to
to
to
to
the
the
the
the
Cabinet
Cabinet
Cabinet
Cabinet
Input and Output Connections
The input and output connections to the system are made to the jacks mounted on the rear
panels of the CHV200B systems, the drivers for the CVH400B and high power systems, and
to the 500 Watt, 750 Watt and 1000 Watt amplifier trays. The CHV200B systems and the
drivers for the CVH400B and higher power systems accept an On Channel RF signal (BRD)
or a SMPTE-310 (BTD) input and output a digital RF ON Channel signal. Refer to Figure 3
and to Table 2 that follow for the locations and information on the jacks and connectors.
J9
J12
J1
J4 J5
J11
J6
J7
J13
J10
Figure 3: Rear View CHV200B and the driver for the CHV400B & higher power systems
Table 2: Connections for the CHV200B and the driver for the CHV400B & higher
power Systems
Port
Type
Function
Input A: On Channel RF Input (BRD) –78 to –8 dBm or
J1
BNC
SMPTE-310 Input (BTD)
J4
BNC
SMPTE-310 Output (BRD Only) Normally jumpered to J5
J5
BNC
SMPTE-310 Input (BRD Only) Normally jumpered to J4
J6
BNC
10 MHz Input: Optional External 10 MHz Reference Input
J7
BNC
1 PPS Input: Optional External 1 PPS Reference Input
J9
RF Output: On Channel RF Output
AC Input: AC input connection to 85-264VAC Source and
J10
IEC
On/Off circuit breaker
Power Monitoring: Interface to System and external amplifier
9 Pos
J11
trays, if present. Also provides an interlock for the Reject
Male D
Load (if used).
15 Pos
Remote: Remote control and status indications. Refer to
J12
Female D Table 7 on pages 21 & 22 for information on the connections.
Serial: Provides communication to System and to external
J13
RJ-45
amplifier trays, if present.
Ethernet: Optional Ethernet connection. May not be present
J14
RJ-45
in your tray.
J15
Front
Panel
J16
Front
Panel
BNC
9 Pos
Female D
RF Sample: Output Sample from Output Detector Board.
In a CHV200B the sample level at J15 is approximately 60dB
down from the output power level of the tray.
Serial: Used to load equalizer taps into the modulator.
Technical Manual, Rev. 0
14
Impedance
50 Ohms
50
50
50
50
50
Ohms
Ohms
Ohms
Ohms
Ohms
N/A
N/A
N/A
N/A
N/A
50 Ohms
N/A
Innovator CHV400BTD ATSC Transmitter
Unpacking and Installation
NOTES: If your CHVBTD system contains an Optional ASI to S310 Converter, connect the
ASI output of the STL to the ASI in jack on the rear panel of the converter.
Connect the SMPTE-310 Output from the SMPTE 310 Out jack on the rear panel of
the converter module to the input jack J1 on the rear panel of the CHV200B and
the driver tray for the CHV400B and higher power systems.
If your CHVBTD system contains an Optional KTECH receiver, connect the RF to the
input jack J1 on the rear panel of the receiver. Connect the SMPTE-310 Output
from the SMPTE 310 Out jack J2 on the rear panel of the receiver to the input jack
J1 on the rear panel of the CHV200B and the driver tray for the CHV400B and
higher power systems.
J4
CB1
CB2
J3
J2
J5
J1
Figure 4: Rear View CHV500, CHV750 and CHV1000 Amplifier Tray
Table 3: Connections for the CHV500, CHV750 and CHV1000 Amplifier Tray
Port
Type
Function
J1
RF Input: On Channel RF from CHVB driver tray
7/16”
J2
(1.1cm)
RF Output: On Channel RF Output
Din
J3
IEC
AC Input: AC input connection to 230VAC Source
Remote: Amplifier Control Interface
J4
9 Pos D
(Connects to J11 on the exciter/driver tray)
J5
RJ-45
Serial data
Impedance
50Ω
50Ω
N/A
N/A
N/A
J8
RF Sample: Output Sample from Combiner thru Control
Front
BNC
Board. In a CHV500B, the sample level is approximately
50Ω
Panel
70dB down from the output power level of the tray.
Refer to Figures 3 and 4, and Tables 2 and 3 for detailed information on the jacks and
connectors. Connect the On Channel RF Input (BRD), –78 to –8 dBm, or the SMPTE-310
Input (BTD), to the 50Ω BNC input jack J1, located on the rear panel of the CHV200B and
the driver tray for CHV400B and higher power systems. The input to J1 can be from the
ASI to S310 converter, the Axciter Tray or any other source of a SMPTE-310 signal.
If used, connect the external 10 MHz reference input to the 50Ω BNC 10 MHz input jack J6
located on the rear panel of the CHV200B and the driver tray for CHV400B and higher
power systems. If used, connect the external 1 PPS reference input to the 50Ω BNC 1 PPS
input jack J7 located on the rear panel of the CHV200B and the driver tray for CHV400B and
higher power systems.
Technical Manual, Rev. 0
15
Innovator CHV400BTD ATSC Transmitter
Unpacking and Installation
In Translator (BRD) systems there is a SMPTE-310 loop-thru from the output of the
Demodulator Board at J4, mounted on the rear panel of the transmitter or driver tray, to
the input to the Modulator Board at J5, mounted on the rear panel of the transmitter or
driver tray. There is a jumper installed from J4 to J5. To feed SMPTE-310 directly to the
Modulator Board, remove the jumper and insert SMPTE-310 into J5. This is only used in
Translator (BRD) systems not Transmitter (BTD) systems.
The digital RF ON Channel output of the CHV200B and the driver tray for CHV400B and
higher power systems is at J9 the 50Ω “N” connector RF output jack located on the rear
panel. In the CHV200B system the output of the tray at J9 connects to the low pass, digital
mask filter and then to the antenna for your system. In CHV400B and higher power
systems the output of the driver tray at J9 is connected to J1 the 50 Ohm “N” connector RF
input jack located on the rear panel of the 500 Watt, 750 Watt, 1 kW amplifier tray or to a
splitter in multiple amplifier systems. In CHV200B systems, check that the system power
metering interface cable is connected from J11 the 9 position “D” connector located on the
rear panel of the driver tray to J4 the 9 position “D” connector located on the rear panel of
the amplifier tray. This cable provides the control, status and operating parameters of the
amplifier tray to the driver tray. In CHV1000B or higher power systems, the output of the
driver tray is split and connected to J1 the “N” type connector RF input jack on the amplifier
trays. Check that the system power metering interface cable is connected from J11 the 9
position “D” connector located on the rear panel of the driver tray to J9 the 9 position “D”
connector located on the System Metering Board. Also check that the serial connection is
cabled from the RJ-45 connector J13 on the driver tray to the RJ-45 connector J1 on the
system metering board. The system metering board provides serial RJ-45 connections at J2
and J5 that are cabled to the RJ-45 serial port J5 on the rear panel of the amplifier trays.
These cables provide the control, status and operating parameters of the amplifier trays to
the driver tray through the System Metering Board.
The digital RF ON Channel output of the amplifier tray is at J2 the 50Ω “7/16” (1.1cm) Din
connector RF output jack located on the rear panel that connects directly to the digital mask
filter, the low pass filter and then to the antenna for your system in single amplifier
systems. In multiple amplifier tray systems the outputs of the trays connect to a combiner
and then the digital mask filter, the low pass mask filter, the output coupler and finally to
the antenna for your system. The output coupler provides a forward and a reflected power
sample that are cabled to the System Metering Board at J8 reflected and J3 forward. Also
connected to the system metering board at J10-6 & 9, is the output of the overtemperature
switch mounted to the reject load that is used as the reject interlock by the system. The
samples and interlock are fed through J9 on the system metering board to J11 on the driver
tray.
This completes the connections of the system.
Technical Manual, Rev. 0
16
Innovator CHV400BTD ATSC Transmitter
Initial On Site
Turn On Procedure
Initial On Site Turn On Procedure
After the Innovator CHVB Series tray or trays are installed and all input, output and AC
connections are made, the system is ready for the initial on site turn on. Check that the
output of the CHV200B tray is connected to an appropriate rated load or to the digital mask
filter, low pass filter and the antenna for your system. If your system is a CHV400B and
higher power system, check that the output of the amplifier tray or the combiner assembly is
connected to an appropriate rated load or to the digital mask filter, low pass filter and the
antenna for your system. Check that the main AC power to the System is ON. If your system
contains an optional ASI to S310 converter module or KTECH receiver tray, check that they
have AC connected to them and that they are turned ON. NOTE: If your system is mounted in
a cabinet and contains an Optional UPS, push On the ON/OFF button, located on the left side of
the top panel of the UPS. The UPS is mounted behind the removable blank panel, located
immediately above the exciter/driver tray, which is held in place by four #10 Phillips head
screws.
If you have a CHV200B system, push ON the switch located on the rear panel of the tray
above the AC power jack. The large fan mounted on the rear panel of the tray should
operate. If your system is a CHV400B and higher power system, switch ON the ON/OFF
circuit breaker(s), located on the rear panel of the amplifier tray(s), mounted on each side of
the AC input power jack. The two fans mounted in the amplifier tray should operate.
The Operate/Standby LED and Status LEDs on the CHV200B should be Green indicating the
system is in Operate and performing normally. The Operate/Standby LED showing Amber
indicates the System is in Standby. The Status LED showing a blinking Red LED indicates an
Event (Fault) is occurring now. The Status LED showing Amber indicates that an Event (Fault)
occurred since the last time the Event (Fault) indications were reset.
If your system is a CHV400B and higher power, the Enable LED and Status LEDs on the 500,
750 or 1000 Watt Amplifier Tray should be Green indicating the system is in Operate and
performing normally. The Enable LED showing Amber indicates the System is in Standby. The
Status LED should be Green indicating no Events (Faults) in the system. If the
Operate/Standby LED shows Amber it indicates that the System is in Standby. If the Status
LED is blinking Red it indicates an Event (Fault) is occurring now. If the Status LED shows
Amber it indicates that an Event (Fault) occurred since that last time the Event (Fault)
indications were reset. The output power is factory set according to customer request and
does not need adjusted. If a problem occurs, call Axcera field support at 724-873-8100 for
information on modifying the power level of the system.
NOTE: The RF System Interlock is provided on J11, a D connector, located on the rear panel
of the CHV200B tray. The RF System Interlock at J11-5 provides the customer with a
means of connecting the system to protection circuits, for the loads, thermal switches,
combiners, or the antenna, in the output of your system, that will place the system in
Standby if the protection circuit opens. The Reject Load Interlock at J11-6 provides
the customer with a means of connecting the system to protection circuits, for the
reject load in multiple amplifier systems, which will place the system in Standby if the
protection circuit opens. If the interlocks are not used in your system, a plug with a
jumper from J11-5 to J11-9, ground, for RF system Interlock and another plug with a
jumper from J11-6 to J11-9, for Reject Load Interlock, need to be connected. These
jumpers provide the RF System and Reject Load Interlocks, which allow the system to
go to operate. Without the jumpers, the system will remain in Standby.
Technical Manual, Rev. 0
17
Innovator CHV400BTD ATSC Transmitter
Initial On Site
Turn On Procedure
Typical System Operating Parameters
Typical Operating Parameters for a CHV20
Parameter
Typical Reading
Forward Power
100%
Reflected Power
<5%
Power Supply Voltage
42 Volts
Heatsink Temperature
20º to 30º F above ambient temperature
Pin Attenuator Voltage
1 Volt to 5 Volts
Typical Operating Parameters for a CHV20 used as driver
Parameter
Typical Reading
Forward Power
20-70% (Depending on output power level of system)
Reflected Power
<5%
Power Supply Voltage
42 Volts
Heatsink Temperature
20º to 30º F above ambient temperature
Pin Attenuator Voltage
1 Volt to 5 Volts
Typical Operating Parameters for a CHV200
Parameter
Typical Reading
Forward Power
100%
Reflected Power
<5%
Power Supply Voltage
42 Volts
Heatsink Temperature
20º to 30º F above ambient temperature
Pin Attenuator Voltage
1 Volt to 5 Volts
Typical Operating
Parameter
Forward Power
Reflected Power
Power Supply Voltage
Heatsink Temperature
Pin Attenuator Voltage
Parameters for a CHV200 used as a Driver
Typical Reading
20-70% (Depending on output power level of system)
<3%
42 Volts
20º to 30º F above ambient temperature
1 Volt to 5 Volts
Typical Operating Parameters for the external Amplifier Tray(s)
in a CHV400 or higher power System
Parameter
Typical Reading
Forward Power
100%
Reflected Power
<5%
Power Supply Voltage
42 Volts
Heatsink Temperature
20º to 30º F above ambient temperature
Technical Manual, Rev. 0
18
Innovator CHV400BTD ATSC Transmitter
Initial On Site
Turn On Procedure
Typical Problems, Indications and Causes in CHV200B Tray
Problem
Indication
No power to
tray
Operate/Standby and Enable LED
indicators and LCD display are Off
No Output
Signal
Front Panel Status LED is Amber
and blinking with no events, faults
indicated.
Loss of Input
Signal
Loss of Input on Modulator Menu
Loss of
Output
Signal
Amber Operate/Standby LED.
Blinking Red Status LED.
Cause
AC power cord not connected.
Main AC to System missing.
On/Off switch on back of tray
Off. 10 Amp fuse (F1) blown*.
Power supply (A9) not operating
On the 8VSB Modulator S310
MPEG Input Selection Set Up
Screen, the Input is currently set
incorrectly to “from Internal
Source”. Set to “from External
Source”.
Loss of input signal.
Any Event, Fault, which Mutes
the output. Including Input
Fault, VSWR Cutback, Overdrive,
Overtemperature and
Overvoltage.
Power supply (A10) not
operating
Power Supply Fault on Power
Supply Menu
Loss of ±12V Operate/Standby and Enable LED
Power supply (A9) not operating
or 5V
indicators and LCD display are Off
NOTE: *A spare 10 Amp fuse is provided in the blank fuse holder under the active
fuse.
Loss of 42V
If there is an Event (Fault) occurring in the system, the Status LED on the front panel will
flash RED as long as the Event (Fault) is present. In addition, the menu will jump to the
current Event (Fault) on the display and blink the Event (Fault) continuously, if the Jump to
Fault screen is set to Yes. When the Event (Fault) is corrected, the tray will turn the Status
LED to AMBER to indicate that there was a Fault and the menu will still display the Fault but it
will not flash. This gives the user the knowledge that there was an Event (Fault) and what
type of Event (Fault) occurred. Before clearing the fault, check if there were other Events
(Faults) by stepping through the menus. To reset the indication of previous Events (Faults)
the user must push the Enter button with the Event (Fault) Reset Screen displayed. This will
reset all previous Events (Faults).
LCD Display and Front Panel LED Indicators
Status LED
LCD Display Left/Right Buttons
Operate/Standby
LED
Up/Down Buttons
Enter Button
J11 Serial Port
Operate/Standby
Buttons
J15 RF Sample
Figure 5: Front View CHV200B and the driver for the CHV400B & higher power systems
Technical Manual, Rev. 0
19
Innovator CHV400BTD ATSC Transmitter
Initial On Site
Turn On Procedure
Table 4: Innovator CXB Series LCD Display
DISPLAY
FUNCTION
Provides a two line readout of the input received channel, internal
LCD
functions, status, and Fault (Event) conditions.
The front panel has seven pushbuttons, two for the control of the system, Operate & Standby,
and five for control of the displayed menus, Left, Right, Up, Down & Enter.
Table 5: Innovator CXB Series Control Pushbuttons
PUSHBUTTON
FUNCTION
OPR
When pushed switches the system to Operate.
STBY
When pushed switches the system to Standby.
ENTER
Selects the changes made in the menus and submenus.
Scrolls through the main menus and after entering the Main Menu
Up & Down Arrow
Steps through submenus of the main menu when they are present.
Used to exit from main menus and submenus of the main menu
Left & Right Arrow
when they are present.
Table 6: Innovator CXB Series Operate/Standby and Status Indicators
LED
FUNCTION
OPERATE/STANDBY
A Green LED indicates that the system is in Operate. An Amber
(Green/Amber)
LED indicates that the system is in Standby.
A Green LED indicates that the system is functioning normally. A
flashing Red LED indicates an Event (Fault) is occurring at this
STATUS
time. An Amber LED indicates an Event (Fault) occurred since
(Green/Red/
the last time the Event (Fault) indications were reset but the
Amber)
system is now operating normally. Amber LED Blinking, with no
Events (Faults) indicates the MPEG input is set to Internal Source.
NOTE: J15 is a Front Panel BNC RF Sample Jack 50Ω that provides an RF output sample from
the output detector board in the tray. In a CHV200B, the sample level at J15 is
approximately 60dB down from the output power level of the tray.
Enable LED Status LED
Sample
Figure 6: Front View Amplifier Tray in CHV400B and higher power systems
Table 7: Innovator CHVB Amplifier Tray LED Indicators and Sample Jack
LED
FUNCTION
ENABLE
A Green LED indicates that the system is in Operate and operating
(Green/Amber)
normally. An Amber LED indicates that the system is in Standby.
Technical Manual, Rev. 0
20
Innovator CHV400BTD ATSC Transmitter
STATUS
(Green/Red/
Amber)
JACK
SAMPLE
J6
Initial On Site
Turn On Procedure
A Green LED indicates that the system is functioning normally with no
faults. A flashing Red LED indicates an Event (Fault) is occurring at
this time. An Amber LED indicates an Event (Fault) occurred since the
last time the Event (Fault) indications were reset but the system is now
operating normally.
FUNCTION
Typical sample value is 65dB down from the output power level of the
tray. (500 Watts output power = -8dBm sample level)
System Remote Connections
J12
Figure 7: Rear View CHV200B and the driver for the CHV400B & higher power systems
The remote connections for the Innovator CHXB Series system are made to the Remote 15
Pos Female “D” connector Jack J12 located on the rear panel of the tray.
Table 7: Remote Connections to J12, 15 Pos Female D Connector, for CXB Series system
Remote Signal
Pin
Signal Type
Description
Name
Designation
Discrete Open Collector Input - A pull
down to ground on this line indicates that
System Operate
J12-1
the System is to be placed into the
Command
operate mode.
(Low = Activate : Floating = No Change)
Discrete Open Collector Input - A pull
down to ground on this line indicates that
the System is to be placed into the
System Standby
J12-2
Command
standby mode.
(Low = Activate : Floating = No Change)
Discrete Open Collector Input - A pull
down to ground on this line indicates that
Power Raise
J12-3
Command
the Power of the System is to be Raised.
(Low = Activate : Floating = No Change)
Discrete Open Collector Input - A pull
down to ground on this line indicates that
the Power of the System is to be
Power Lower
J12-4
Command
Lowered.
(Low = Activate : Floating = No Change)
Discrete Open Collector Input - A pull
down to ground on this line indicates that
System Interlock
J12-5
the Interlock is present.
(Low = OK : Floating = Fault)
Discrete Open Collector Input. - Sets the
Set to
J12-6
Command
Modulation type of the system.
Modulation Type
(Low = Analog : Floating = Digital)
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
Remote Signal
Name
Pin
Designation
Set Channel
(Set Up 1 or Set
Up 2)
J12-7
Ground
J12-8
System Forward
Power Level
J12-9
System Aural
Power Level
J12-10
System Reflected
Power Level
J12-11
Report Input
Status
J12-12
Report Fault
Status
J12-13
Report Operate
Status
J12-14
Ground
J12-15
Initial On Site
Turn On Procedure
Signal Type
Discrete Open Collector Input. – Selects
one of two possible Channel Setups of the
system.
(Low = Set Up 2, CH 2 : Floating = Set
Up 1, CH 1) NOTE: The Set Up 1 & Set
Up 2 settings are displayed and changed
in the Upconverter Set Up Menus.
Ground
Analog Output - 0 to 4.0 V. - This is a
buffered loop through of the calibrated
“System Forward Power”. Indicates the
System Forward power.
Scale factor is 100 % = 2.0V.
Analog Output - 0 to 4.0 V. - This is a
buffered loop through of the calibrated
“System Aural Power”. Indicates the
System Aural power. Scale factor is
100 % = 2.0V. (Not used in Digital)
Analog Output - 0 to 4.0 V. - This is a
buffered loop through of the calibrated
“System Reflected Power”. Indicates the
System Reflected power.
Scale factor is 25 % = 2.0V.
Discrete Open Collector Output. Indicates if input to system is Normal or
Not.
(Low = OK : Floating = Fault)
Discrete Open Collector Output. Indicates if system is Operating Normally
or has a Fault.
(Low = OK : Floating = Fault)
Discrete Open Collector Output. –
Indicates whether system is in Operate or
Standby.
(Low = Operate : Floating = Standby)
Ground
Description
Command
Metering
Metering
Metering
Status
Status
Status
LCD Front Panel Screens
A LCD display, located on the front of the Innovator CHXB Series systems, displays, on
screens, the current operating status of the system. When the tray is powered On, the LCD
will initially display two splash screens. The first splash screen will be displayed for a few
seconds, then the second splash screen will be displayed for a few seconds and finally the RF
Power Display default screen will be displayed. See examples of the screens below. The RF
Power Display default screen will be the screen displayed if no buttons are pushed to access
other screens. While viewing the RF Power Display default screen, pushing the Left and Right
arrow buttons together will also access the splash screens.
Splash Screen Number 1
The first splash screen displayed indicates the manufacturer, type and the model number.
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Turn On Procedure
Splash Screen Number 2
The second splash screen indicates the Firmware and Version Numbers of the software used
in the system. The example shown is Firmware number 1312423: Version number 4.2/2.4.
The final screen is the RF Power default screen which indicates the Forward Power and
Reflected Power for the system.
Left/Right Buttons
Up/Down Buttons
Enter Button
The following screens are scrolled through using the buttons to the right of the display. Pushing
and releasing the Up & Down Arrows will scroll you through the Main Menus, which are shown
on the following pages aligned on the left side of the page. The Submenus of the Main Menus
are accessed by pushing and releasing the ENTER button. Once in the Submenus, pushing and
releasing the Up & Down Arrows will scroll you through the submenus of the Submenus. The
Submenus are shown on the following pages indented under the Main Menus and the submenus
of the Submenus are indented under the Submenu in which they are contained. In the SET UP
Menus, changes are made to the display by Pushing and releasing the ENTER button which
causes the item to be changed to blink, then using the left and right arrow buttons to display
the desired changed item, finally, pushing the ENTER button will accept the changes made upon
exit of the Set Up Menu.
NOTE: An example of accessing and changing an item using the Set Up Menus is as follows.
This procedure is to set the Off Air Receive Channel to the desired channel. Push and
release the DOWN Arrow button until the SYSTEM SET UP Main Menu is displayed.
Push and release the ENTER button. The Authorization Warning screen is displayed.
Push and release the ENTER button again and the ENTER BUTTON SETS TO CHANGE
MODE screen is displayed. Push and release the ENTER button again and the first set
up menu, which is the SET UP MENUS OF CHASSIS VALUES screen is displayed. Push
and release the DOWN Arrow button until the SET UP 8VSB DEMODULATOR screen is
displayed. Push and release the ENTER button to display the submenus under the SET
UP 8VSB DEMODULATOR menu. Push and release the DOWN Arrow until the 8VSB
DEMODULATOR USE OFF AIR CHxx is displayed. Push and release the ENTER button
and the XX, which indicates the Channel Number, will blink. Push and release the UP
or DOWN Arrow button until the desired new channel number is displayed. Push and
release the ENTER button, and the PUSH ENTER TO ACCEPT CHANGES menu is
displayed. Push and release the ENTER button again to accept the changes made.
The channel is now changed. Push and release the LEFT Arrow to exit to the SET UP
8VSB DEMODULATOR screen. Push and release the LEFT Arrow again to exit to the
SYSTEM SET UP Main Menu. Push and release the UP or DOWN arrows to browse the
main menus.
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Turn On Procedure
The following screens are typical of an operating system. The values indicated on the screens
in your system may vary from those shown below.
Operation Screens
NOTE: The following Operation screens provide operating information only. No adjustments
are available using these screens.
Table 8: Transmitter/Translator RF Power Screen (BTD/BRD)
This is the default screen that is displayed after the splash screens are displayed. This screen
provides an indication of the Forward Output Power of the system in terms of Percent.
(Typically 100%). The screen also provides an indication of the Reflected Power of the
system in terms of Percent. (Typically less than 5%). Push the DOWN Arrow to view the next
main menu, which is the Transmitter Event Log Main Menu.
Table 9: Transmitter/Translator Event Log Main Screen (BTD/BRD)
This is the Transmitter Event Log Main Screen. Push the ENTER button to access the Event
List submenu. Push the DOWN Arrow to view the next main menu, which is the Transmitter
Details Main Menu.
Table 9.1: Transmitter/Translator Event List Screen (BTD/BRD)
When events occur, they will be displayed on this screen. The Up and Down arrow will
page you through the different entries in the event log. The above screen indicates
the 001 event of 013 total events that have occurred in the Transmitter. The number
in the parenthesis on the top right, is this case 01, indicates the number of times the
displayed event has occurred. The bottom line scrolls to indicate the event that
occurred, in this case RF Interlock Fault, and the time the event occurred after the
prior event. Push the LEFT Key to exit to the Transmitter Event Log Main Menu
screen. Pushing the RIGHT Key will access the Event Reset Screen.
Table 9.2: Transmitter/Translator Event Reset Screen (BTD/BRD)
This screen allows the resetting of events, after they are observed or corrected.
NOTE: Resetting the events on an amplifier may cause the transmitter to momentarily
mute.
Table 10: Transmitter/Translator Details Main Screen (BTD/BRD)
This is the System Details Main Screen. Push the ENTER button to access the Device Details
Chassis Values Main Sub Screen or push the DOWN Arrow to view the next main menu, which
is the System Set Up Main Menu.
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Turn On Procedure
Table 10.1: Transmitter/Translator Device Details Exciter Values Screen
(BTD/BRD)
This is the System Device Details Exciter Values Main Sub Screen. Push the ENTER
button to access the Device Details Exciter Values submenus or push the DOWN Arrow
to view the next main submenu, which is the 8VSB Demodulator Sub Menu.
Table 10.1.1: Transmitter/Translator Driver Forward/Reflected Power Details
Screen (BTD/BRD)
This screen provides an indication of the Output Forward Power of the Driver
Tray in terms of Percent, typically 20-70%. This screen also provides an
indication of the Reflected Output Power of the Driver Tray in terms of Percent,
Typically less than 3%.
Table 10.1.2: Heatsink Temperature Details Screen (BTD/BRD)
This screen indicates the temperature of the amplifier heatsink assembly,
mounted in the system or driver tray, in degrees Fahrenheit. If the
temperature is below the trip point, 194º F, it will indicate OK. If an
overtemperature Event (Fault) occurs, it will reset at 176º F.
(Typically 20º to 30º F. above ambient temperature)
Table 10.1.3: Power Supply Voltage Details Screen (BTD/BRD)
This screen indicates the power supply voltage in the system or driver tray. If
the power supply voltage is below the trip point, it will indicate OK. The fault
limit is the nominal supply voltage as set in the Exciter Setup Screen ±10%.
Table 10.1.4: RF System Interlock Details Screen (BTD/BRD)
This screen indicates if the external RF system interlock is present in your
system. (Typically Present. Must be present or system will remain in Standby.)
Table 10.1.5: Reject Load Interlock Details Screen (BTD/BRD)
This screen indicates if the external Reject Load interlock is present in your
system. (Typically Present. Must be present or system will remain in Standby.)
Table 10.1.6: AGC Details Screen (BTD/BRD)
This menu indicates if the AGC circuit has an input.
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Turn On Procedure
Table 10.1.7: AGC Overdrive Details Screen (BTD/BRD)
This menu indicates if the AGC circuit is operating within its range.
Table 10.1.8: AGC Auto/Manual Details Screen (BTD/BRD)
This menu indicates if the AGC circuit is operating in Auto or Manual.
Table 10.1.9: ALC Voltage Level Details Screen (BTD/BRD)
This menu indicates the Auto ALC voltage setting. (Typically 1 to 5 V)
Pushing the Left Arrow will display the System Device Details Exciter Values
Main Sub Screen and then pushing the Down arrow will access the System
Device Details 8VSB Demodulator Main Sub Screen.
Table 10.2: Translator 8VSB Demodulator Details Screen (BRD)
This is the System Device Details 8VSB Demodulator Main Sub Screen. Push the
ENTER button to access the Device 8VSB Demodulator submenus or push the DOWN
Arrow to view the next main menu, which is the Device Details 8VSB Modulator Main
Sub Menu.
Table 10.2.1: System Input Details Screen (BRD)
This screen provides the user information on the signal to noise ratio and signal
strength of the received signal. The signal to noise ratio is provided on this
menu to indicate to the user the quality of the receive signal. This reading also
assists the user in the positioning of the antenna. The signal strength ranges
from 0 to 100% and typically should be above 40% for reliable operation. The
signal strength allows the user to optimize the position of the receive antenna.
Table 10.2.2: Demodulator Details Screen (BRD)
This menu indicates whether there is a signal present at the demodulator.
Table 10.2.3: Demodulator Phase Lock Loop Details Screen (BRD)
This menu indicates whether the Phase Lock Loop is locked in the demodulator.
Table 10.2.4: Receive Input Channel Details Screen (BRD)
This menu indicates the input channel to the Demodulator circuit.
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Innovator CHV400BTD ATSC Transmitter
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Turn On Procedure
Pushing the Left Arrow will display the System Device Details 8VSB
Demodulator Values Main Sub Screen and then pushing the Down arrow will
access the System Device Details 8VSB Modulator Main Sub Screens.
Table 10.3: Transmitter/Translator 8VSB Modulator Details Screen
(BTD/BRD)
This is the System Device Details 8VSB Modulator Main Sub Screen. Push the ENTER
button to access the Device 8VSB Modulator submenus or push the DOWN Arrow to
view the next main menu, which is the Device Details IF Processor Main Sub Menu.
Table 10.3.1: Transmitter/Translator S310 Input Details Screen (BTD/BRD)
This menu indicates if the modulator has locked to the SMPTE-310 signal
coming from the demodulator.
Table 10.3.2: Modulator Phase Lock Loop A Details Screen (BTD/BRD)
This menu indicates if the Phase Lock Loop A in the modulator is locked.
Table 10.3.3: Modulator Phase Lock Loop B Details Screen (BTD/BRD)
This menu indicates if the Phase Lock Loop B in the modulator is locked.
Table 10.3.4: Modulator Linear Equalization Details Screen (BTD/BRD)
This menu indicates if the Linear Equalization is being used.
Table 10.3.5: Modulator Non Linear Equalization Details Screen (BTD/BRD)
This menu indicates if the Non Linear Equalization is being used.
Pushing the Left Arrow will display the System Device Details 8VSB Modulator
Values Main Sub Screen and then pushing the Down arrow will access the
System Device Details IF Processor Main Sub Screen.
Table 10.4: Transmitter/Translator IF Processor Details Screen (BTD/BRD)
This is the System Device Details IF Processor Main Sub Screen. Push the ENTER
button to access the Device IF Processor submenus or push the DOWN Arrow to view
the next main menu, which is the Device Details Upconverter Main Sub Menu.
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Turn On Procedure
Table 10.4.1: IF Processor Input Details Screen (BTD/BRD)
This menu indicates if there is an input signal to the IF Processor.
Table 10.4.2: IF Processor Modulation Present Details Screen (BTD/BRD)
This menu indicates if there is Modulation on the signal to the IF Processor.
Pushing the Left Arrow will display the System Device Details IF Processor
Values Main Sub Screen and then pushing the Down arrow will access the
System Device Details Upconverter Main Sub Screen.
Table 10.5: Upconverter Device Details Screen (BTD/BRD)
This is the System Device Details Upconverter Main Sub Screen. Push the ENTER
button to access the Device Upconverter submenus or push the DOWN Arrow to view
the next main menu, which is the Device Details Downconverter Main Sub Menu.
Table 10.5.1: Upconverter Phase Lock Loop 1 Details Screen (BTD/BRD)
This menu indicates if the Phase Lock Loop 1 in the upconverter is locked.
Table 10.5.2: Upconverter Phase Lock Loop 2 Details Screen (BTD/BRD)
This menu indicates if the Phase Lock Loop 2 in the upconverter is locked.
Table 10.5.3: Upconverter 10 MHz Phase Lock Loop Details Screen (BTD/BRD)
This menu indicates if the 10 MHz Phase Lock Loop in the upconverter is locked.
Table 10.5.4: Upconverter 10 MHz Details Screen (BTD/BRD)
This menu indicates if the 10 MHz reference used is generated internally or
provided by an external reference source.
Table 10.5.5: Upconverter System Channel Details Screen (BTD/BRD)
The upconverter transmit channel screen indicates the channel that the
upconverter is currently set and the center frequency of that channel.
Displayed above is CH: 7 that has a Center Frequency of 177MHz.
Pushing the Left Arrow will display the System Device Details Upconverter
Values Main Sub Screen and then pushing the Down arrow will access the
System Device Details Downconverter Main Sub Screen, if present.
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Turn On Procedure
Table 10.6: Downconverter Device Details Screen (BTD/BRD)
NOTE: This screen is only used with an Axciter.
This is the System Device Details Downconverter Main Sub Screen. Push the ENTER
button to access the Device Downconverter submenus or push the DOWN Arrow to go
to the External Amplifier Device Details Screen, if present, or back to the Device
Details Exciter Values screen.
Table 10.6.1: Downconverter RF Input Details Screen (BTD/BRD)
NOTE: This screen is only used with an Axciter.
The Downconverter RF Input details screen indicates that an RF input is present
to the downconverter and the level of the input.
This is the final Device Details Main Sub Menu. Push the LEFT Arrow twice to
go back the Main System Details Screen. Then push the DOWN Arrow to
access the System Set Up Main Menu.
Table 10.7: External Amplifier Device Details Screen (BTD/BRD)
This is the Transmitter Device Details External Amplifier Main Sub Screen. This is the
final Device Details Main Sub Menu. Push the ENTER button to access the Device
External Amplifier #1. Push the LEFT Arrow to go back the Main Device Details
Screen. Then push the DOWN Arrow to access the Transmitter Set Up Main Menu.
NOTE: Shown below are the External Amplifier #1 Details Screens. The
External Amplifier #2, #3 or #4 Details Screens are presented in the same
order if they are present in the system.
Table 10.7.1: External Amplifier #1 Forward Power Details Screen (BTD/BRD)
Indicates Output Power for external amplifier #1. NOTE: See the final test
data sheet for the typical value.
Table 10.7.2: External Amplifier #1 Reflected Power Details Screen (BTD/BRD)
Indicates Reflected Power for external amplifier #1. NOTE: See the final test
data sheet for the typical value.
Table 10.7.3: External Amplifier #1 I1-A1 Current Details Screen (BTD/BRD)
Indicates Current of the A1 device in the external amplifier #1. NOTE: See the
final test data sheet for the typical current value.
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Table 10.7.4: External Amplifier#1 I2-A2 Current Details Screen (BTD/BRD)
Indicates Current of the A2 device in the external amplifier #1. NOTE: See the
final test data sheet for the typical current value.
Table 10.7.5: External Amplifier#1 I3-B1 Current Details Screen (BTD/BRD)
Indicates Current of the B1 device in the external amplifier #1. NOTE: See the
final test data sheet for the typical current value.
Table 10.7.6: External Amplifier#1 I4-B2 Current Details Screen (BTD/BRD)
Indicates Current of the B2 device in the external amplifier #1. NOTE: See the
final test data sheet for the typical current value.
Table 10.7.7: External Amplifier #1 A Power Supply Details Screen (BTD/BRD)
Indicates the voltage of the A power supply in the external amplifier #1.
NOTE: Typical voltage value is +42VDC nominal.
Table 10.7.8: External Amplifier #1 B Power Supply Details Screen (BTD/BRD)
Indicates the voltage of the B power supply in the external amplifier #1.
NOTE: Typical voltage value is +42VDC nominal
Table 10.7.9: External Amplifier #1 A Temperature Details Screen (BTD/BRD)
Indicates the temperature of the A heatsink in the external amplifier #1.
NOTE: Typical temperature for DVB = ≈20-30°C above ambient.
Table 10.7.10: External Amplifier#1 B Temperature Details Screen (BTD/BRD)
Indicates the temperature of the B heatsink in the external amplifier #1.
NOTE: Typical temperature for DVB = ≈20-30°C above ambient.
Table 10.7.11: External Amplifier #1 Code Version Details Screen (BTD/BRD)
Indicates the code version in the external amplifier #1.
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Turn On Procedure
Set Up Screens
Table 11: Transmitter/Translator Set Up Main Screen (BTD/BRD)
This is the System Set Up Main Screen. Push the ENTER button to access the Authorization
Warning Main Sub Screen or since this is the final Main Screen, pushing the DOWN Arrow will
take you back to the System RF Power Default Screen.
The Set Up item or parameter that can be changed on the displayed sub menu screen, is
indicated by pushing the ENTER button, which causes the changeable item to blink. The UP
or DOWN arrow will change the selection until the desired result is displayed. Pushing the
ENTER Button will accept the change.
Table 11A: Authorized Personnel Screen (BTD/BRD)
This screen of the system notifies an operator that they are only to proceed if they are
authorized to make changes to the system's operation. Changes made within the
following set-up screens can affect the system’s output power level, output frequency, and
the general behavior of the system. Please do not make changes within the system's setup screens unless you are familiar with the operation of the system. Pressing the ENTER
button will display the Enter Key Sets to Change screen.
Table 11B: Enter Key Sets to Change Mode Screen (BTD/BRD)
This screen informs the operator that to make changes, the Enter key or the Right key
must be pushed, which will cause the display that can be changed to blink. Use the up or
down key to change the display and the left or right key to move the blinking item on the
display. After changes are made in the Set Up Menus pushing the enter Key, Button, will
accept the changes made. With the Right Key Sets To Change Mode screen displayed,
pushing the ENTER button will access the first main submenu under the Set Up main
menu, which is the Chassis Values Set Up Menu.
Table 11.1: Chassis Values Main Set Up Menu Screen (BTD/BRD)
This is the System Set Up Chassis Values Main Sub Screen. Push the ENTER button to
access the Chassis Values submenus or push the DOWN Arrow to view the next Set Up
Main Sub Screen, which is the Set Up 8VSB Demodulator Main Sub Screen. NOTE:
Refer to the description in Table 11B for how to change the values on the following
set-up screens.
Table 11.1.1: Chassis Values Forward Power Set Up Screen (BTD/BRD)
Remote or front panel adjustment of the output power of the transmitter. The
bar graph indicates the range remaining in the adjustment.
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Table 11.1.2: Chassis Values Model Number Set Up Screen (BTD/BRD)
This screen allows the set up of the Model Number of the
transmitter/regenerative translator. This causes the system to access the
proper parameters to be displayed on the LCD screens. NOTE: Do not change
this screen without first consulting with Axcera.
Table 11.1.3: Chassis Values Jump to Menu on Fault Set Up Screen (BTD/BRD)
This screen allows the user to select if the system will change the display
automatically. When ON is selected, the screen indicating the faulted condition
is displayed when the fault, event, occurs.
Table 11.1.4: Chassis Values Latch On an Input Fault Set Up Screen (BTD/BRD)
This screen allows the user to select that the system, by selecting ON, will latch
the input fault if it occurs, then if the input returns the fault will still register.
Table 11.1.5: Chassis Values IF Processor Selection Screen (BTD/BRD)
This screen allows the user to select that the system has an IF Processor.
Table 11.1.6: Chassis Values Downconverter Selection Screen (BTD/BRD)
This screen allows the user to select that the system has a Downconverter.
Table 11.1.7: Chassis Values Amplifier Power Supply Voltage Screen (BTD/BRD)
This screen allows the user to select the Power Supply Voltage.
Table 11.1.8: Chassis Values number of Amplifiers in System Screen
(BTD/BRD)
This screen indicates the number of external amplifier trays in the system. By
selecting the enter key, the system will scan to find the number of external
amplifier trays. NOTE: Do not change this screen without first consulting with
Axcera.
Table 11.1.9: Chassis Values Ethernet Option Set Up Screen (BTD/BRD)
Only displayed if Ethernet Controller is not present in your system.
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Table 11.1.10: Chassis Values Reset Ethernet User Name Set Up Screen
(BTD/BRD)
When the optional Ethernet Controller is present, this screen is displayed. It is
used to reset the username / password file of the Ethernet controller. If this
operation is selected, ON, the username / password file is replaced with the
user name set to ‘admin’ and the password set to ‘axcera’.
Table 11.1.11: Chassis Values Ethernet Address Set Up Screen (BTD/BRD)
When the optional Ethernet Controller module is present, this screen is used to
view or change the Ethernet TCP Address of the controller.
Table 11.1.12: Chassis Values Ethernet Netmask Set Up Screen (BTD/BRD)
When the optional Ethernet Controller module is present, this screen is used to
view or change the TCP subnet mask of the Ethernet controller.
Table 11.1.13: Chassis Values Ethernet Gateway Set Up Screen (BTD/BRD)
When the optional Ethernet Controller module is present, this screen is used to
view or change the TCP gateway (router) address of the Ethernet controller.
Table 11.2: 8VSB Demodulator Main Set Up Menu Screen (BRD)
This is the System Set Up 8VSB Demodulator Main Sub Screen that is only present in
the Regenerative Translator mode. Push the ENTER button to access the Set Up 8VSB
Demodulator submenus or push the DOWN Arrow to view the next Set Up Main Sub
Screen, which is the Set Up 8VSB Modulator Main Sub Screen. NOTE: Refer to the
description in Table 11B for how to change the values on the following set-up screens.
Table 11.2.1: 8VSB Demodulator Channels Set Up Menu Screen (BRD)
This screen allows selection of the channel plan which can be changed to either
Off Air or Cable.
Table 11.2.2: 8VSB Demodulator Channel Select Set Up Menu Screen (BRD)
This screen allows selection of the channel, for the channel plan selected in the
previous screen.
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Table 11.3: 8VSB Modulator Main Set Up Menu Screen (BTD/BRD)
This is the System Set Up 8VSB Modulator Main Sub Screen. Push the ENTER button
to access the Set Up 8VSB Modulator submenus or push the DOWN Arrow to view the
next Set Up Main Sub Screen, which is the Set Up Upconverter Main Sub Screen.
NOTE: Refer to the description in Table 11B for how to change the values on the
following set-up screens.
Table 11.3.1: 8VSB Modulator MPEG Selection Set Up Screen (BTD/BRD)
This screen allows the user to select between an external and an internal
source in the 8 VSB modulator. During the installation of the system, an off air
signal may not be available to the modulator, therefore the user can set the
source to INTERNAL to generate an 8 VSB signal inside the tray that can be
used for set up. Once the Receive Signal is available, the source must be set to
EXTERNAL.
NOTE: The front panel Status LED will be Amber and blinking, with no faults,
events, if the MPEG input is set to Internal Source.
Table 11.3.2: 8VSB Modulator Linear Equalization Selection Screen (BTD/BRD)
This screen controls the operation of the linear equalizer. When set to ON, the
modulator applies linear correction to the IF output. When set to OFF, no
correction is applied to the IF.
Table 11.3.3: 8VSB Modulator Non Linear Equalization Selection Screen
(BTD/BRD)
This screen controls the operation of the non linear equalizer. When set to ON,
the modulator applies non linear correction to the IF output. When set to OFF,
no correction is applied to the IF.
Table 11.4: Upconverter Main Set Up Menu Screen (BTD/BRD)
This is the System Set Up Upconverter Main Sub Screen. Push the ENTER button to
access the Set Up Upconverter submenus. Push the LEFT Arrow to go back the Main
System Set Up Screen. NOTE: Refer to the description in Table 11B for how to
change the values on the following set-up screens.
Table 11.4.1: Upconverter Channel Type Selection Screen (BTD/BRD)
One of the above screens is displayed as the first screen on entering the
upconverter set up screens. It will indicate the Channel Type currently selected.
The display will not be blinking. Pushing the Down Button will display the
Upconverter Channel Selection Screen. NOTES: The Upconverter transmit channel
type should not be changed, unless the transmitter is being converted from one
channel to another. The SETUP 1 or SETUP 2 selection is controlled by a Low,
ground, for SETUP 2 or a High, open, for SETUP 1 at J12-7, on the Remote
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Turn On Procedure
Interface Jack J12 located on the rear panel of the Exciter/Driver Tray. Changes
should only be made while the transmitter is in standby. Contact Axcera Field
Service before using this menu.
With a Channel or Custom Frequency screen displayed, the Channel type can be
set to the American Channel, European Channel, Custom UHF Frequency or Custom
VHF Frequency by first pushing the enter button. This will cause the channel type
to blink. Pushing the Up or Down Arrow Key will display each Channel type screen
in sequence. When the desired screen is displayed pushing the Enter Button will
cause the display to become steady. This displayed channel type is now used in
the following screen to configure the Upconverter PLL circuits.
Table 11.4.2: Upconverter Channel Selection Screen (BTD/BRD)
The above screen is displayed when the Down Arrow is pushed at the channel type
selection screen. It will indicate the Channel currently selected and the center
frequency of the selected channel. The display will not be blinking. Pushing the
Down Button will display the Upconverter IF Frequency Selection Screen. NOTES:
The Upconverter transmit channel should not be changed, unless the transmitter is
being converted from one channel to another. Changes should only be made while
the transmitter is in standby. Contact Axcera Field Service before using this menu.
To change the Channel, the enter button must be pushed. This will cause the
Channel number to blink. Pushing the Up or Down Arrow Key will display each
Channel in sequence. To enter a custom Center Frequency, press the Right or Left
Key to select the value to change. The Up or Down Arrow will adjust the value
selected. When the desired Channel and Center Frequency are set, pushing the
Enter Button will cause the display to become steady. This displayed Channel and
corresponding Center frequency is now the upconverter output.
When exiting the set up menus a prompt will inform you that the Enter Key must
be pushed to accept the changes that were made.
Table 11.4.3: Upconverter IF Frequency Selection Screen
The transmit channel IF Frequency should not be changed, unless the transmitter
is being converted from one digital IF Frequency to another. The IF Frequency can
be changed to 36 MHz or 44 MHz by pushing the Up or Down Arrow. The IF
Frequency for all DVB transmitters should be 44 MHz. NOTES: Changes should
only be made while the transmitter is in standby. Contact Axcera Field Service
before using this menu.
Table 11.5:Downconverter Main Set Up Menu Screen
NOTE: This screen is only present when an Axciter is part of the system.
This is the System Set Up Downconverter Main Sub Screen. Push the ENTER button to
access the Set Up Downconverter submenu or push the LEFT Arrow to go back the
Main Downconverter Set Up Screen. Push the LEFT Arrow again to go back the Main
System Set Up Screen.
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Innovator CHV400BTD ATSC Transmitter
Initial On Site
Turn On Procedure
Table 11.5.1: Downconverter RF Input Level Screen
This screen allows the operator to monitor the RF input level and to set the
desired input value.
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Innovator CHV400BTD ATSC Transmitter
System Description
System Description
The Innovator CHVB Series Systems are of two different types. They are either
Regenerative Translators, example: CHV200BRD, or DTV Transmitters, example:
CHV200BTD. The Regenerative Translator (BRD) accepts an RF On Channel signal (-79
to –8 dBm) and converts it to a DTV RF On Channel output signal. The DTV System
(BTD) takes a SMPTE-310 Input and converts it to a DTV RF On Channel output signal.
The SMPTE-310 input can be from an ASI to S310 converter, a KTECH Receiver Tray, an
Axciter Tray or any other SMPTE-310 source. The output power level of either
configuration is typically up to 200 Watts ATSC using a single tray, at 400 or 500 Watts
ATSC using an additional single amplifier tray, at 1000 or 1500 Watts ATSC with two
Amplifier trays, at 2000 Watts ATSC with three Amplifier trays, or at 3000 Watts ATSC
with four Amplifier trays. The Innovator CHVB Series system provides linear and
nonlinear correction capability for the transmission path as well as internal test sources
that are used during initial system installation.
The CHV200B systems and the driver tray for higher power systems contain the Digital
Modulator w/Power Conditioner (1309629) that is made up of (A2) the Digital Modulator
Board (1304883) and (A22) the Power Conditioner Board (1309404). The tray also
contains (A3) the IF Precorrector Board (1308796), (A4) the Frequency Agile
Upconverter (1309695), and (A6) the Amplifier Assembly. The (A7) Output Metering
Detector Board (1313747), (A8) the Innovator CX Control Board (1312543), (A9) the
+5V, ±12V Power Supply and (A10) the +28V/+42VDC Power Supply are also contained
in the tray. The BRD kit (1310182) supplies the (A1) 8 VSB Demodulator Board
(1308275) to the tray to make it a regenerative translator.
The type of (A6) Amplifier Assembly used in the tray changes as the output power of the
system changes. The Amplifier Assembly (1313959) is used in CHV20B systems and the
Amplifier Assembly (1313912) is used in CHV200B systems.
The (A10) Power Supply Assembly also changes as the output power of the system
changes. A +28V/300W Power Supply is used in CHV20B Systems and a +42V/1100W
Power Supply is used in CHV200B systems.
When configured as an ATSC Transmitter (BTD), the SMPTE-310 input at (J1), from an
ASI to S310 converter, a KETCH Receiver, an Axciter Tray or any other SMPTE-310
source, connects directly to the input jack (J42) on the (A2) Digital Modulator Board
(1304883). When configured to operate as a Regenerative Translator (BRD), the DTV
ON Channel RF Input at (J1), (-8 to -79 dBm) connects to the Tuner Input Jack on (A1)
the 8 VSB Modulator Board (1308275) supplied with the (BRD) kit. The 8 VSB
Modulator Board (1308275) converts the DTV input to a SMPTE-310 output at (J13) that
connects to the input jack (J42) on the (A2) Digital Modulator Board (1304883). The
rest of the tray operates the same for both the BRD and the BTD systems.
The IF output of the 8 VSB modulator board connects to J2 on the IF pre-corrector board
(1308796). The IF Pre-Corrector Board provides ALC, automatic or manual, gain control
of the IF level. The board also supplies pre-correction Response, In Phase and
Quadrature Non-Linear adjustments. The board has the circuitry for ALC Fault, Input
Fault and Modulation Fault monitoring and indications. The IF is connected to the digital
upconverter board (1309695) that takes the 44 MHz or 36 MHz IF signal and converts it
to a TV channel frequency in the range of 54-860 MHz. The RF on channel signal is fed
to the ALC Board, Innovator CXB Series (1308570), which is used to control the drive
power to the RF amplifier chain in the CHV200B Transmitter/Translators. In a CHV20B,
the RF is connected to the (A6) Amplifier Assembly (1313959) that is made up of (A6Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
System Description
A1) the VHF HB Pre-Driver Amplifier (1313899) and (A6-A2) the 100 Watt Amplifier
Pallet, Italmec (1313484). The assembly has approximately 36 dB of gain. The
amplified output at approximately +38 dBm connects to the (A7) Output Metering
Detector Board (1313747) which provides forward (2V=100%) and reflected (2V=25%)
power samples to the CX Control Board (1312543) for metering and monitoring
purposes. An output power sample is also supplied to the front panel sample jack J15,
which is a 50Ω BNC type. The typical sample value in a CHV200B is approximately 60dB
down from the output power level of the tray. The RF output is cabled to J2 the “N”
connector RF output jack on the rear panel of the tray. In CHV200B single tray systems
the output connects to a digital mask filter, low pass filter and then the antenna for your
system. In CHV400B and CHV500B systems, the RF output, from the driver tray, is
connected to J1 on the rear panel of the amplifier tray. The RF is cabled to J1 on the
Amplifier Heatsink Assembly in the amplifier tray. In CHV1000B and higher power
systems the RF is connected to a splitter and then to the inputs of the amplifier trays.
The CHV400B ATSC system is made up of a CHV20B Driver Tray and a 400 Watt ATSC
Amplifier Tray. The CHV20B is used as a driver that connects to the 400 Watt Amplifier
tray and supplies the needed drive level to produce the 400 Watts output of the system.
The control and operating parameters of the 400 Watt Amplifier Tray are displayed on
the LCD Screen on the Driver Tray. In the CHV400B amplifier tray, the RF input signal
to the tray is at J1 on the rear panel of the tray that is cabled to J1 on the two way
splitter and then to J1 on the two amplifier pallets. In a standard CHV400B amplifier
tray, a single +42VDC power supply provides the operating voltages, through the
current metering board, to the two amplifier pallets. In a N+1 CHV400B amplifier tray,
two +42VDC power supplies are diode-ord and provide the operating voltages, through
the current metering board, to the two amplifier pallets. If one power supply should
malfunction, the other power supply will maintain the necessary voltage to provide the
400 Watts output. The amplified output of the pallets, which have approximately 15 dB
gain, is connected to a two way combiner before it is cabled to J2 the 7/16” (1.1cm) Din
RF output jack of the tray. The two way combiner supplies a forward and a reflected
power sample to the amplifier control board for metering and monitoring purposes.
The CHV500B ATSC system is made up of a Driver Tray and a 500 Watt Amplifier Tray.
The CHV200B is used as a driver that connects to the CHV500 Amplifier tray and
supplies the needed drive level to produce the 500 Watts output of the system. The
control and operating parameters of the 500 Watt Amplifier Tray are displayed on the
LCD Screen on the driver Tray. In the CHV500, the input RF signal at J1, located on the
rear panel of the tray, is fed to J1 on the 4 Way Splitter Board, which supplies four
outputs, one to each amplifier pallet. Each amplifier pallet has approximately 14 dB
gain. The amplified outputs of the pallets are combined in the 4 Way combiner board
whose output is at J1. The RF is connected to J2 the 7/16” (1.1cm) Din RF output jack
located on the rear panel of the tray. The 4 way combiner board supplies a forward and
a reflected power sample to the amplifier control board for metering and monitoring
purposes. In a CHV500B, the typical sample value at J6, a 50Ω BNC jack located on the
front panel of the tray, is approximately 65dB down from the output power level of the
tray.
In higher power systems, multiple amplifier trays are used along with splitters and
combiners to produce the desired output. A System Metering Board (1312666) provides
forward, reflected, overtemperature and other parameters to the exciter/driver tray
from the external power amplifier chain. The CHV1000Bis made up of a driver tray, a
two way splitter, two CHV500B amplifier trays and a two way combiner with a 500W
reject load. The reject load provides isolation protection of the operating power
amplifier if the other amplifier fails. One–half the power of the operating amplifier tray
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Innovator CHV400BTD ATSC Transmitter
System Description
connected to the combiner will be dissipated by the reject load with the other half of the
power going to the output filters and the antenna. The CHV1500B is made up of a
driver tray, a two way splitter, two CHV750B amplifier trays and a two way combiner
with reject load. The CHV2000B is made up of a driver tray, a three way splitter, three
CHV750B amplifier trays and a three way combiner with reject load. The CHV3000B is
made up of a driver tray, a four way splitter, four CHV1000B amplifier trays and a four
way combiner with reject load. The reject loads in the multi-amplifier systems have
thermal switches connected to them which monitor the temperature of the load and
provide the overtemperature fault, if it occurs, through the system metering board to
the exciter/driver tray.
The On Channel RF output of the amplifier tray either connects directly to the digital
mask filter and low pass filter and then to the antenna in single amplifier systems or to a
combiner, the digital mask filter, low pass filter, output coupler and finally to the
antenna in multiple amplifier systems. The output coupler provides a forward and a
reflected power sample to the system metering board which detects the samples and
supplies the forward and reflected power levels to the exciter/driver tray for use in the
metering circuits.
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System Description
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Innovator CHV400BTD ATSC Transmitter
Web Ethernet
Interface Description
(Optional) Innovator CHVB Series Web Ethernet Interface
The Innovator CHVB Series Web Ethernet Interface (1310183) allows for the monitoring
and control of the Innovator CHVB Series system without the need for special software
on the remote computer. This option may not be included in your system.
Figure 8: Typical Ethernet User Log In Screen
Once a connection has been established, the web interface can be launched by entering
the IP address of the Innovator CHVB Series system as a URL in the browser of the
remote computer. A login screen will be displayed prompting for a user name and
password, which are case sensitive. There are two levels of access: administrative
and view only. The factory default user name and password are:
User name:
Password:
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Innovator CHV400BTD ATSC Transmitter
Web Ethernet
Interface Description
Figure 9: Typical Ethernet Main Control/Monitoring Screen
After logging in, the main control/monitoring screen is displayed, allowing operate and
standby control and read back of the system parameters. Refer to Figure 9 for a typical
main control/monitoring screen.
Green = okay/normal operation
Yellow = warning, no fault
Red = current fault
Orange = latched fault
To change the web interface settings, click the ‘configure’ button near the top of the
screen while you are logged as an administrator. When entering a site ID be sure to not
use special characters except underscores, dashes, and forward slashes.
If the item on screen is Orange, which indicates latched fault, the fault can be reset by
pushing the Fault Reset button located top middle of screen.
To manage user accounts, click the ‘Account Management’ button near the top of the
configure screen
NOTES: If your system contains the optional DVB Universal Modulator Board, the
Modulator Status button is displayed at the top left of the screen, under the Operate
Standby buttons. When this button is selected, a separate window opens in which
various screens are accessed for the monitor and control of the Universal Modulator.
Information on the WEB interface of the DVB Universal Modulator Board is contained in
Chapter 3 of the separate Universal Modulator Instruction Manual.
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Innovator CHV400BTD ATSC Transmitter
Web Ethernet
Interface Description
Figure 10: External Amplifier Status Screen
This screen indicates the status of the External Amplifier Trays giving all the main
operating parameters. Figure 10 shows a typical status screen for two external amplifier
trays. A total of four external amplifier trays can be displayed. The color of the
parameter indicates the status of that parameter.
Green = okay/normal operation
Yellow = warning, no fault
Red = current fault
Orange = latched fault
Push the System Status button to return to the control/monitoring screen.
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Innovator CHV400BTD ATSC Transmitter
Web Ethernet
Interface Description
Figure 11: Typical Ethernet Configuration Menu
For the first time configuration of the system, the following must be completed. A
computer must be placed on the same LAN as the Innovator CHVB Series system,
(NOTE: The Innovator CHVB does not serve DHCP addresses – they must be entered
manually on the setup computer). The setup computer has the following factory default
settings. Refer to Figure 8 for a typical configuration screen. (NOTE: A crossover cable
may be needed if connecting directly from a computer to the Innovator CHVB Series
system).
IP address:
Subnet Mask:
Default Gateway:
192.168.0.1
255.255.255.000
10.0.0.1
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Innovator CHV400BTD ATSC Transmitter
Web Ethernet
Interface Description
Figure 12: Typical Account Management Screen
The Innovator CHVB supports up to 5 different users. To add or change one of the
accounts click the Add/Change button in the row of the account you want to modify, then
enter the desired name, password, and administrator rights for the user and click save.
Figure 13: Typical Account Management Screen when Add/Change selected
Push the Back button to return to the control/monitoring screen.
When you have completed using the web interface, please remember to log out via the
'logout' button at the top of the control/monitoring screen.
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Innovator CHV400BTD ATSC Transmitter
Web Ethernet
Interface Description
NOTE: The Reset Ethernet User ID Screen, in the Set Up Menus on the LCD Display,
allows the user the option of resetting the User name and Password for the
Ethernet. The Yes or No selection can be changed by pushing the Up or Down
Button. After the selection has been made, the user needs to depress the right
or left arrow and then the display will ask “PUSH ENTER TO ACCEPT CHANGES”.
If the ENTER button is depressed, the change will be accepted. If any other
button is depressed, the change will not be made. If Yes is selected on the
screen, and accepted, the User name and Password will reset to the factory
default.
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Innovator CHV400BTD ATSC Transmitter
SNMP Ethernet
Interface Description
(Optional) Innovator CHVB Series SNMP Ethernet Interface
NOTE: The Innovator CHVB Series SNMP Ethernet Interface (1313079) includes the Web
Ethernet Interface described in the previous section of this manual. These interfaces
may not be part of your system.
The Innovator CHVB Ethernet Controller is available in a version that implements Simple
Network Management Protocol (SNMP). SNMP is a standardized method of transferring
information from one electronic device to another. SNMP is typically used to remotely
control and monitor several transmitter devices from a centralized network management
system (NMS). SNMP is a communication method between two applications and is not a
graphical user interface. Therefore, SNMP functionality is included along with web page
server functionality. SNMP is used to gather information or set control states but it
requires additional computer applications for operator monitoring and control.
The Innovator CHVB Ethernet Controller implements SNMP version 2 (SNMP v2) using a
Management Information Base (MIB). The MIB file defines all SNMP parameters of the
transmitter, specifies the format of data, and orders the presentation of the parameters
using a hierarchical namespace containing object identifiers (OID). Each OID identifies a
variable that can be read, read and set, or only set via SNMP commands.
SNMP functionality also provides for alert messages that are issued from the Ethernet
Controller to one or two network computers. A SNMP trap message is sent only once
and is not acknowledged by the receiving device. The Ethernet Controller issues a trap
message when data is added to the transmitter fault log (either activation of a fault or
when a fault is cleared), or when the transmitter operate/standby status changes.
SNMP Configuration
The Ethernet Controller's TCP/IP Address, Subnet Mask, and Gateway must be
configured with static values that are valid within your network. Dynamic Host
Configuration Protocol (DHCP) is not implemented; however access to these
configuration parameters is available through the front panel setup menus of the
Innovator CHVB.
The Innovator CHVB's SNMP MIB allows up to two SNMP trap destinations. The TCP/IP
address of a trap processing computer is configured through the SNMP parameters
called 'site_trap_adr1' and 'site_trap_adr2'. To clear a previously configured trap
destination and cause the system not to issue traps to a specific address, set the value
to '000.000.000.000'.
Reading of SNMP values is done with the message's community access set to 'public'.
When setting SNMP values, a default community access level of 'private' is used. Future
implementations of the Ethernet SNMP agent may allow for the set community access
level to be defined through the device's web server.
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Innovator CHV400BTD ATSC Transmitter
SNMP Ethernet
Interface Description
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Innovator CHV400BTD ATSC Transmitter
Board Descriptions
Circuit Descriptions of Boards in the CHV200B System
(A1) 8 VSB Demodulator Board (1308275) - Only used with BRD operation
Overview
The 8 VSB demodulator assembly receives an off air 8 VSB signal on any VHF or UHF
channel and demodulates this to an MPEG-2 transport stream that is per the SMPTE310M standard. The input to the assembly is at an “F” style connector on the shielded
tuner and can be at a level of –8 to –78 dBm. The tuner (TU1) down converts the RF
channel to a 44 MHz IF signal. This signal is the input to the digital receiver chip U1.
The digital receiver chip subsequently decodes the IF and delivers an MPEG-2 transport
stream on a parallel data bus to a programmable logic array, U8. U8 clocks the
asynchronous MPEG data from the receiver chip and outputs a synchronous data stream
at a 19.39 MHz rate to buffer/driver U11. U11 subsequently drives the output at J13 to
a lower level that is AC coupled out of the board.
Microcontroller Functions
A microcontroller, U17, is provided on this assembly to supervise the operation of the
receiver chip and the tuner. In addition, the microcontroller also interfaces to the front
panel LCD display via connector J24 and pushbutton interface on J27. On power up, the
microcontroller sets the tuner to the last channel that was selected when the unit was
powered down. In addition, the microcontroller also configures the digital receiver to
operate as an 8 VSB receiver. The communication between all of the devices on this
board is via an I2C serial bus that is local to this board.
Jumper and DIP Switch Settings
This board can be used in various assemblies. When this assembly is installed in the
Innovator CXB product, the jumpers on J7 and J8 should be placed between pins 2 and 3
for normal operation. The DIP switch SW1 should be configured as indicated in Table
12.
Table 12: Innovator CX Receive /Demodulator/Transcoder Dip Switch SW1
Position Function
When Switch is Off
When Switch is On
Original Tuner
SW1-1
Tuner Type
Recent Tuner (DTT7680x)
(DTT765xx)
SW1-2
Signal Strength Gain
Gain = 8.0
Gain = 9.3
Channels 2, 3, or 4 are offset
SW1-3
Special Channel Plan
Normal
up 4 MHz
SW1-4
Reserved for Future
SW1-5
Reserved for Future
SW1-6
Reserved for Future
SW1-7
Reserved for Future
SW1-8
Operation Type
Transcoder Operation
Innovator CX/CXB Operation
NOTES: SW1-8 operation is available in software versions greater than or equal to 2.3
with hardware versions greater than or equal to D0, unless the board was factory
modified.
These switch positions are factory set for your system and should not be changed.
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Innovator CHV400BTD ATSC Transmitter
Board Descriptions
(A2) Digital Modulator Board (1304883), Part of the Digital Modulator
w/Power Conditioner (1309629)
The Digital Modulator w/Power Conditioner (1309629) is made up of the Digital
Modulator Board (1304883) and the Power Conditioner Board ((1309404).
SMPTE-310 Input
The digital modulator board accepts a SMPTE-310 input at the SMA connector J42 from
the 8 VSB demodulator board in a BRD system or directly from the RF input jack on the
rear panel of the tray in a BTD system. This input is applied to a high speed window
comparator U21 that adjusts the level to a low voltage TTL signal to be used by the
Altera FPGA, U3. The SMPTE-310 signal is input to the FPGA to recover the clock and
the data. A portion of the clock and recovery circuit is performed by a high-speed
comparator, U17, which functions as an external delay circuit.
Channel Coder
The FPGA subsequently uses the SMPTE-310 clock and data as the input to the channel
coder contained inside the FPGA. The channel coder is a series of DSP blocks defined by
the ATSC standard for 8 VSB data transmission. These blocks include the data
randomizer, Reed Solomon Encoder, data interleaver, trellis coder, and sync inserter.
The channel coder portion inside the FPGA generates the 8 distinct levels in an 8 VSB
system. These levels are subsequently input to a linear equalizer that provides for
frequency response correction in the transmission path. The linear equalizer is a 67 tap
FIR filter that is loaded with tap values from the microcontroller, U1, located on this
board. The output of the linear equalizer is then input to two pulse shaping filters, an in
phase (I) and a quadrature (Q) filter that are also located inside the FPGA. The pulse
shaping filters are FIR filters that have fixed tap values that are preset inside the FPGA.
The output of the pulse shaping filters is then applied to a Pre-Distortion Linearizer chip,
U4, which can be used to correct for nonlinearities in the data transmission path. The
output of the Pre-Distortion chip is gain scaled and output to a dual D/A converter,
which output a baseband I and Q analog signal.
Analog Output Section
The baseband I and Q signals from the D/A converter are applied to differential analog
filters that remove some of digital artifacts from the D/A conversion process. The output
of the I channel filter is then mixed with the pilot frequency, 46.69 MHz, using mixer
U30. The output of the Q filter is mixed with the pilot frequency that is phase shifted 90
degrees using mixer U34. The mixers are current driven devices so that when the
outputs of U30 and U34 are connected together, they provide a combined output. This
combined output is subsequently input to a final differential output filter which provides
the final IF output at the SMA connector, J38. To maintain signal integrity, this IF
output is connected to the SMA connector J39 with a small semi-rigid cable assembly.
The final IF output then appears at J1-2B.
Pilot Frequency Generation
The 46.69 MHz pilot, which is used in the mixing process, is generated from a 46.69
MHz VCXO, U37 that is phase locked to a 10 MHz reference. The VCXO and the 10 MHz
are divided down to a common frequency, which is then compared internal to the FPGA.
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Innovator CHV400BTD ATSC Transmitter
Board Descriptions
The FPGA subsequently provides error signals to an analog phase locked implemented
with op amp stages U45-A, B and C. The output of these compensation stages is used
as the control voltage to the VCXO, U37. The phase locked output of U37 is applied to
an analog filter to remove harmonics of the pilot and then input to the quadrature
splitter Z1. The outputs of Z1 are used as the inputs to the mixers in the analog output
section.
Voltage Requirements
The ±12 VDC and +5VDC needed for operation of the board connect to J1 on the Power
Conditioner Board (1309404) which delays the +5VDC so that the ±12 VDC to the 8 VSB
Modulator Board is applied first. The voltage output of the power conditioner board is at
J2 that is jumpered to J30 on the 8 VSB modulator board.
The ±12 VDC connect to the 8 VSB modulator board at J30-1. The +12V SYS connects to
J18A, B & C and to regulator circuits. The +12V SYS is filtered by L2, L3, C105 and C106
before it is applied to the rest of the board as +12VQ and +12VI. The -12 VDC SYS
connects to J19A, B & C and to regulator circuit. The -12V SYS is filtered by L6, L7, C111
and C112 before it is applied to the rest of the board as -12VI and –12VQ.
The +12V SYS also connects through the resistor R81 to provide +5V EXT to the rest of
the board, and to the regulators U23 that provides +3.3V to the rest of the board and to
U27 that provides +1.8V output. The +3.3V also connects to U24 that supplies +1.5V
output. The +12V SYS connects to the regulator U25 and U26 to supply the +5VA output.
The output of U25 also connects to U28, which provides the +5V output to the rest of the
board. +12V SYS is filtered by L4 and C107 to provide the +12V output to the board.
The –12V SYS also connects to the regulator U22 that provides the –5V VA to the rest of
the board. -12V SYS is filtered by L5 and C108 to provide the -12V output to the board.
Amplitude and Phase Correction
Pin
Attenuator
J2
IF Input
0 dBm Pk Pwr
In Phase
In Phase
Splitter
Combiner
Quad
Quad
Quad
Front Panel
Input Fault
Indicator
Video Loss
Indicator
Input
Input and
Fault
Modulation
Detectors Modulation
Loss
ALC
TP1 = 1V
Level
Detector
Frequency
Response
Corrector
Frequency
Response
Corrector
Frequency
Response
Corrector
J1
IF
Output
(A3) IF Pre-Corrector Board (1308796)
The IF Pre-Corrector Board provides ALC, automatic or manual, gain control of the IF
level. The board also supplies pre-correction Response, In Phase and Quadrature Non-
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Board Descriptions
Linear adjustments. The board has the circuitry for ALC Fault, Input Fault and
Modulation Fault monitoring and indications.
The input IF signal at J2, typically 0 dBm peak power centered at 36 or 44 MHz, is fed to a
splitter circuit Z1 which produces two equal outputs, one at Port 1 and the other at Port 2.
The output at Port 1 connects to the input and modulation fault circuitry. The output at
Port 2 connects to the pin-diode attenuator circuit.
Pin-Diode Attenuator Circuit
The output of Z1 at Port 2 connects to a pin-diode attenuator circuit that consists of CR1,
CR2 & CR3. Each of the pin diodes contains a wide intrinsic region; this makes the diodes
function as voltage-variable resistors at this intermediate frequency. The value of the
resistance is controlled by the DC bias supplied to the diode. The pin diodes are
configured in a pi-type attenuator configuration where CR1 is the first shunt element, CR3
is the series element, and CR2 is the second shunt element. The control voltage, which
can be measured at TP2, originates either from the ALC circuit when the switch S1 is in
the ALC Auto position, between pins 2 and 3, or from pot R37, MAN GAIN, when S1 is in
the Manual Gain position, between pins 1 and 2. In the pin diode attenuator circuit,
changing the amount of current through the diodes by forward biasing them changes the
IF output level of the board. By controlling the value of the voltage applied to the pin
diodes, the IF signal level is maintained at the set level.
When the IF signal passes out of the pin-diode attenuator through C7, it is applied to the
modular amplifier U1. This device contains the biasing and impedance-matching circuits
that makes it operate as a wide-band IF amplifier. The output of U1 connects through C8,
NON-LIN IN, to the Summing Port input of the splitter Z3. The splitter provides the
outputs to the Non-Linear Pre-Corrector stages. The output at Port 1 connects to the
Quadrature Pre-Corrector and the output at Port 2 connects to the In Phase PreCorrectors.
In Phase and Quadrature Corrector Circuits
Two of the Pre-Corrector stages are in the In Phase Amplitude pre-correction path and one
stage is in the Quadrature Phase pre-correction path. Each stage has a variable threshold
control adjustment, R67 and R69, in the In Phase path, and R89 in the Quadrature path,
which determine the point that the gain is changed in each of the stages.
The output of Z3 at Port 2 connects to J10, which is jumpered through W5 to J9. External
In-Phase Corrector circuits may be connected between these jacks. The signal from J9
connects to the first corrector stage on the board. The first corrector stage in the In
Phase path operates as follows. The In Phase IF signal is applied to the transformer T3,
which doubles the voltage swing by means of a 1:4 impedance transformation. Resistors
R75 and R78 form an L-pad that lowers the level of the signal. The input signal level,
when it reaches a set level, causes the diodes CR9 and CR11 to turn on, generating
current flow that puts them in parallel with the L-pad. When the diodes are put in parallel
with the resistors, the attenuation through the L-pad is lowered, causing stretch of the
signal.
The signal is next applied to amplifier U8 to compensate for the loss through the L-pad.
The breakpoint, or cut-in point, for the first corrector is set by controlling where CR9 and
CR11 turn on. This is accomplished by adjusting the threshold cut-in resistor R67. R67
forms a voltage-divider network from +6.8 VDC to ground. The voltage at the wiper arm
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of R67 is buffered by the unity-gain amplifier U5A. This reference voltage is then applied
to R68, R71, and C33 through L11 to the CR9 diode. C33 keeps the reference from
sagging during the vertical interval. The .9 VDC reference voltage is applied to the unitygain amplifier U5B. The reference voltage is then connected to diode CR11 through choke
L12. The two chokes L11 and L12 form a high impedance for IF that serves to isolate the
op-amp ICs from the IF.
After the signal is amplified by U8, it is applied to the second corrector stage in the In
Phase path through T4. The second In Phase Stage and the stage in the Quadrature path
operate in the same fashion as the first. All three corrector stages are independent and
do not interact with each other. The In Phase Correctors can be disabled by moving the
jumper W4 on J8 to the Disable position, between pins 1 & 2. This moves all of the
breakpoints past the signal peaks so that they will have no affect. The pre-distorted IF
signal, in the In Phase path, connects to the op amp U9 whose output level is controlled
by R88, the in phase amplifier adjustment. The pre-distorted In Phase IF signal
connects to Port 1 on the combiner Z4.
The Port 1 output of Z3 connects from J11 through the W6 jumper to J12. The IF is
connected to T5, the 1:4 impedance transformer input to the Quadrature circuit.
External Quadrature Corrector stages may be connected between jacks J11 and J12.
The pre-distorted IF signal, in the Quadrature Phase path, connects to the op amp U11
whose output gain is set by R102, which provides a means of balancing the level of the
Quad Phase pre-distorted IF signal that connects to Port 2 on the combiner Z4.
The Quadrature and In Phase pre-distorted IF signals are combined by Z4, amplified by
U10 and connected through C57 to the S Port of the splitter Z2. Z2 provides two outputs
of the combined Quadrature and In Phase pre-distorted IF signals.
Frequency Response Corrector Circuit
The output of Z2 at Port 2 connects to the first corrector stage of the three-stage
frequency-response corrector circuit. The three stages are adjusted as needed to attain
the best response across the bandwidth. The frequency-response corrector circuit
operates as follows. Variable resistors R24, R25 and R26 are used to adjust the depth
and gain of the notches and variable caps C14, C15 and C16 are used to adjust the
frequency position of the notches. These are adjusted as needed to compensate for
frequency response problems. The jumpers W1 on J4, W2 on J5 and W3 on J6 are
moveable to set the frequency response of the circuits for 44 MHz, which is between
pins 2 & 3 or between 1 & 2 for 36 MHz.
The Non-Linear and Frequency Response pre-corrected IF is connected to the op-amp
U2. After amplification, the IF is split with one path connected through a divider
network to J1 the IF output jack on the board, -12 dBm. The other path is fed through a
divider network to J3 the IF Sample Jack, –18dBm.
ALC Circuit
The other non-linear pre-corrector output of Z2 at Port 1 connects to the input of the ALC
circuit. The IF signal is applied to the transformer T1, which doubles the voltage swing by
means of a 1:4 impedance transformation. It is connected to the ALC detector circuit,
consisting of C11, CR4 and R21. The detected ALC level output is amplified by U3A and
wired to U3B, pin 6, where it is summed with the power control setting of R40 the ALC
Adjust pot.
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The output of U3B connects through S1 pins 2 to 3, if it is in the ALC position, to the pindiode attenuator circuit, CR1, CR2 & CR3. The high forward biases them more or less,
that increases or decreases the IF level, therefore the output level. When the input signal
level increases, the forward bias on the pin attenuator decreases, therefore the output
power decreases, that maintains the output power as set by the customer.
The ALC voltage is set for 1.0 VDC at TP1 with a –12 dBm peak sync output as measured
at J1 of the board. The ALC action starts with the ALC detector level monitored at TP1.
The detector output at TP1 is nominally, 1.0 VDC, and is applied through resistor R33 to a
summing point at op-amp U3B pin 6. The current available from the ALC detector is
offset, or complemented, by current taken away from the summing junction. In normal
operation, U3B pin 6, is at 0 VDC when the loop is satisfied. If the recovered or peakdetected IF signal level at the IF input to this board should drop, which normally indicates
that the output power has decreased, the null condition no longer occurs at U3B pin 6.
When the level drops, the output of U3B pin 7 goes more positive. If S1 is in the
Automatic position, it will cause the ALC pin-diode attenuators CR1, CR2, and CR3 to have
less attenuation and therefore increase the IF level that will compensate for the decrease
in the output power level.
If the ALC cannot increase the input level enough to satisfy the ALC loop, due to the lack
of range, an ALC fault will occur. The fault is generated because U3C pin 9, increases
above the trip point set by R47 and R50 until it conducts. This makes U3C pin 8, high and
causes Q3 to conduct, which lights the Red ALC Fault LED DS1.
Input Fault and Modulation Fault Circuitry
The input IF signal at Z1 Port 1 connects to the input and modulation fault circuitry at
T2. T2 doubles the voltage swing by means of a 1:4 impedance transformation. The
output is connected to a detector circuit, consisting of R54, CR6, R58 and C19. The
detected IF level output is amplified by U4A and then split. There is a Test Point at TP3
for a voltage reference check of the input level.
One output of U4A is connected to the detector CR5 that produces a Peak Sync Voltage,
which is applied to the Op-Amp U12A. The detector provides a reference that
determines the IF signal level at the input to the Board. The operation of the Threshold
Detector is as follows. The Minimum IF Input level at TP3 is fed through detector CR5 to
the Op-Amp IC U12A Pin 2. The reference voltage for the Op-Amp is determined by the
voltage divider consisting of R52 and R57 off the +12 VDC line. When the detected
input signal level at U12A Pin 2 falls below this reference threshold, approximately 10 dB
below the normal input level, the output of U12A at Pin 1, goes to the +12 VDC Rail.
This High is connected to the Gate of Q4 which forward biases it and creates a current
path from the +12 VDC line through the Red LED DS2, the Input Level Fault Indicator
which lights, and the Transistor Q4 to Ground. The High also connects through the
diode CR7 to the Gate of Q6 that conducts and connects a low to J7-1, Input Loss, which
is wired to the Control Board for control and monitoring.
The Video Input Level at TP3 is also fed to a modulation loss circuit consisting of the IC
U4B, U12B and associated component. When the input signal level to the U4B falls
below the reference set by R62 and R60, which acts as a loss of Modulation Detector,
the output of U4B, goes high which is split. One part biases On the Transistor Q9. A
current path is then established from the +12 VDC line, the resistors R63 and R64, the
Red LED DS3, the Modulation Loss Indicator, which lights, through Q9 to ground. The
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other High output of U4B is connected to U12B pin 5 whose output at pin 7 goes High.
This high connects to the gate of Q8 Biasing it On. With Q8 On, a low is connected to
J7-2, Modulation Loss, which is wired to the Control Board for control and monitoring.
±12 VDC, +6.8 VDC, and VREF needed to operate the Board
The ±12 VDC connects to the board at jack J7. The +12 VDC connects to J7 pins 5 and 6
and is filtered by L10 and C25 before it is applied to the rest of the board. The
-12 VDC connects to J7 pin 8 and is filtered by L9 and C23 before it is applied to the rest
of the board.
Two reference voltages are needed for the operation of the pre-corrector circuits. One
+12 VDC input is split by R103 and R104. The split +12 VDC output through R103
connects to the Zener diode VR1, which generates the +6.8 VDC output that is used in the
pre-corrector stage. The split +12 VDC output through R104 connects to the diodes CR15
and CR16 that supply a .9 VDC reference output voltage, VREF, which provides
temperature compensation for the two diodes in each of the in phase and quadrature precorrector stages.
Mixer
Mixer
J6
IF Input
J7
RF Output
1.1-1.9 GHz
1 GHz
1 GHz
TCXO
Fract-N PLL
10 MHz
TCXO
Integer-N PLL
Integer-N PLL
VCO 1
External
10 MHz
Detection
J10
External
10 MHz Input
VCO 2
Band Switching
from Ext Control
(A4) Frequency Agile Upconverter Board (1309695)
The board takes a 44 MHz or 36 MHz IF signal and converts it to a TV channel in the
range of 54-860 MHz. The IF input signal, (≈-8dBm level), is connected to J6 on the
board. The IF first passes through a frequency response pre-corrector, consisting of
R145, C188, R 146 and C189. The pre-corrector circuit compensates for any response
variation in the ceramic filter used to pick the appropriate conversion sideband. The
pre-corrected signal is then converted to a second IF centered at 1044 MHz using U16,
U18 and associated components. The signal is next applied to a second mixer, U15,
where it is converted to the final RF channel frequency. The signal is then sent to a low
pass filter that removes unwanted conversion products above 1 GHz, amplified by U21
passed to another low pass filter that removes unwanted conversion products above 1
GHz, amplified by U20 and connected to J7 the RF output jack for the board (≈-3dBm
level).
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The upconverter has two local oscillators, LO1 and LO2. The LO1 oscillator consists of
U1, U2, U5, U6 and amplifiers U3 and U4. The LO1 oscillator operates at 1 GHz for 44
MHz IF inputs and is used to convert the signal to 1044 MHz. In 36 MHz IF systems, this
oscillator circuit operates at 1.008 GHz. The Red LED DS4 will light if the PLL for the
LO1 oscillator is not locked.
The second LO, LO2, consists of two VCOs, U26 and U31, that are used to generate the
second LO. One VCO operates from 1.1-1.5 GHz and the second from 1.5-1.9 GHz. The
Red LED DS2 will light if the PLL for the LO2 oscillator is not locked.
Both of the LOs, LO1 and LO2, are locked to an on board 10 MHz VCXO. The 10 MHz
VCXO circuit consists of U36, U39, the VCTCXO Y1 and associated components. When
an external 10 MHz signal is applied to J10 on the board, the internal VCXO is locked to
the external 10 MHz, otherwise, it is free-running. The Red LED DS6 will light if an
External 10 MHz reference is present. The Red LED DS3 will light if the PLL for the 10
MHz oscillator is not locked.
J1
RF Input
Pin Attenuator
J2
RF Output
Auto/Man Select
TP1
Input Loss
Detector
Overdrive Detect
TP4
Mute from
Control Circuit
ALC
Output Power
Reflected Power
Input Power
Reference
(A5) ALC Board, Innovator CX Series (1308570)
The ALC Board, Innovator CX Series, is used to control the RF drive power to the RF
amplifier chain in the CHV200B system. The board accepts an 8-VSB RF input signal at
a nominal input level of -3 dBm average power and amplifies it to whatever drive level is
necessary to drive the final RF amplifier in the tray to full power. The input signal to the
board at J1 is split by U4, with one half of the signal driving a PIN diode attenuator, DS1
and DS2, and the other half driving a detector, U13, that is used to mute the PIN
attenuator when there is no input signal. The output of the PIN attenuator is sent to two
cascaded amplifiers, U2 and U3, which are capable of generating +10 dBm average
power from the board at J2.
The PIN attenuator is driven by an ALC circuit or by a manual fixed voltage bias,
depending on the position of switch S1. When the switch is pointing to the left, looking
from the front of the tray, the ALC circuit is enabled. When the switch is pointing to the
right, the ALC circuit is disabled and the PIN attenuator is controlled through the Manual
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gain pot R62. When the switch is in either ALC or manual, the voltage in the unused
circuit is preset low by the circuitry connected to pins 4-6 on SW1. This allows the RF
power to ramp up slowly to full power when the switch changes positions. CR8, C33 and
associated components control the ramp up speed of the manual gain circuit. CR9, C42
and their associated circuits do the same thing for the ALC circuit. The practical effect of
this is to preset the RF drive power to near zero output power when enabling and
disabling the ALC, followed by a slow controlled ramp up of power.
The ALC circuit normally attempts to hold the tray output power constant, but there are
four faults that can override this. These faults are Input Fault, VSWR Cutback Fault,
VSWR Shutdown Fault and Overdrive Fault.
The Input Fault is generated by comparator U7C and presets the PIN attenuator and ALC
circuit to maximum attenuation whenever the input signal drops below about -7 dBm.
Test point TP2 allows the user to measure the detected input voltage.
The VSWR cutback circuit is set so that the ALC circuit will start reducing RF drive once
the Reflected power reaches a level of about 6% and will keep reducing the drive to
maintain that level. The cutback is generated by U8A, U8B and their associated
components that diode-or the metering voltages. The forward power is scaled to
2V = 100 % and the reflected power is scaled to 2V = 25%. The Reflected metering
voltage is doubled again by U8B so that when the voltage of U8B exceeds the voltage at
the output of U8A, the reflected power takes over the ALC circuit. Once the U8B voltage
drops below the forward power at U8A, the forward power takes over again.
The VSWR shutdown circuit will shut the tray down if the Reflected power increases to
15% or higher, which can happen if the tray sees reflected power when the ALC is in
manual.
The Overdrive protection looks at a sample of the RF signal that is applied to J1 of the
board. The peak level of this signal is detected and can be measured on TP1. This
voltage is applied to a comparator with the threshold set by R38. If this threshold is
exceeded, the ALC circuit mutes then ramps up to try again. This circuit also works in
manual gain as well.
(A6) Amplifier Assembly (1313959) – Used in the CHV20B Tray
The (A6) Amplifier Assembly (1313959) is made up of (A6-A1) the VHF HB Pre-Driver
Assembly (1313899) and (A6-A2) the 100 Watt Amplifier Pallet, Italmec (1313484).
The ALC Board (1308570) is also part of this assembly. The assembly has
approximately 36 dB of gain.
(A6-A1) VHF HB Pre-Driver Assembly (1313899)
The VHF HB Pre-Driver Assembly (1313899) consists of a driver stage and a parallel
connected final amplifier stage, that have a total gain of approximately 23 dB.
The input RF at J1 connects through a matching network consisting of R11-R13 to a
splitter IC Z1. The split outputs connect to parallel-connected push-pull 1 Watt high
linearity amplifier ICs (U1& U4) operating in class AB each with approximately 17 dB of
gain. The board uses a power supply voltage of +42VDC that connects to J6. The
+42VDC is filtered on the board and connected to the step down transformer T1 which
produces a +12VDC output that is used by the two amplifier ICs (U1 & U4). The two
amplified outputs are connected to a combiner IC Z2. The combined output connects
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through a directional coupler U6 to J2, the RF output jack of the board. The directional
coupler provides an RF sample at J4 that is used by an external overdrive protection
circuit located on the (A6-A3) ALC Board. The output of the pre-driver amplifier
assembly at J2 connects to the RF Input connection on the (A6-A2) 100W Amplifier
Pallet, Italmec.
(A6-A2) 50 Watt Amplifier Pallet, Italmec (1313484)
The 50 Watt Amplifier Pallet, Italmec is made by Italmec for Axcera’s use. This
broadband amplifier operates in the frequency range of 170 to 240 MHz. The amplifier
is capable of delivering a maximum output power of 25 Watts digital, with an
amplification factor of approximately 24 dB. The RF output of the pallet is wired to J2
the RF output jack of the 20W driver amplifier assembly. The output of the 20W driver
amplifier assembly is cabled to the J1 on (A7) the output metering detector board
(1313747).
(A6) 200 Watt Driver Amplifier Assembly (1313912) – Used in the CHV200B
The (A6) Amplifier Assembly (1313912) is made up of (A6-A1) the 50 Watt Amplifier
Pallet, Italmec (1313484) and (A6-A2) the 500 Watt Amplifier Pallet, Italmec (1313581).
The ALC Board (1308570) is also part of this assembly. The assembly has
approximately 36 dB of gain.
(A6-A1) 50 Watt Amplifier Pallet, Italmec (1313484)
The 50 Watt Amplifier Pallet, Italmec is made by Italmec for Axcera’s use. This
broadband amplifier operates in the frequency range of 170 to 240 MHz. The amplifier
is capable of delivering a maximum output power of 25 Watts digital, with an
amplification factor of approximately 24 dB. The RF output of the pallet is wired to J2
the RF output jack of the 20W driver amplifier assembly. The output of the 20W driver
amplifier assembly is cabled to the RF input connection on (A6-A2) the 500 Watt
Amplifier Pallet, Italmec.
(A6-A2) 500 Watt Amplifier Pallet, Italmec (1313581)
The 500 Watt Amplifier Pallet, Italmec is made by Italmec for Axcera’s use. This
broadband amplifier operates in the frequency range of 170 to 240 MHz. The amplifier
is capable of delivering a maximum output power of 200 Watts digital, with an
amplification factor of approximately 25 dB. The RF output of the pallet is wired to J2
the RF output jack of the 200W driver amplifier assembly. The output of the 200W
driver amplifier assembly is cabled to the J1 on (A7) the output metering detector board
(1313747).
(A7) Output Metering Detector Board (1313747)
The (A7) Output Detector Board provides forward (2V=100%) and reflected (2V=25%)
power samples to the CX Control Board for metering and monitoring purposes. R7 is the
reflected power calibration pot and R23 is the forward power calibration pot. A Forward
power sample, -10 dBm, connects to J4 (-10 dBm typical) on the board, which is cabled
to the front panel sample jack of the tray. The RF output of the board will vary
depending in which system it is located, is at J2, which is cabled to J9 the RF Output
Jack of the amplifier tray.
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(A8) Control Card, Innovator CX (1312543)
The Innovator CX control board provides the overall system control for the CXB system.
There are two main elements of the board, U7 and U9. U7 is a programmable logic
device that is loaded with firmware, which provides the overall system control. It
decides whether or not to allow the system to generate RF output power, and turns the
+32 VDC power supply on and off depending on whether or not it is receiving any faults,
either faults generated on board, or faults generated externally. The second major
component of the board is the microcontroller U9, which controls the front panel
indications and drives the display. The U9 microcontroller is not involved in the decision
making process, U7 does that. Rather, it is layered on top of U7 and is the EPLD's
interface to the outside world. Information is passed between the microcontroller and
the EPLD. The microcontroller communicates information to and from the front panel
and sends the EPLD the information it needs to decide whether or not to allow the
system to turn on. The front panel viewable LEDs DS3 for Operate/Standby and DS4 for
Status indicate the current operating condition of the system are mounted on and
controlled by this board. The U9 microcontroller can also communicate, using the
Optional Ethernet Kit, with a daughter card that allows the user to view remote control
parameters via a web Ethernet interface.
The ±12 VDC and +5 VDC from the (A9) power supply are routed to the other boards in
the tray through this board. The (A10) +28/+42 VDC power supply connects the
+28/+42 VDC to the board at J19-1 with 4 common. The ±12 VDC and +5 VDC input
voltages to this board is connected through J21 and filtered before being connected to
the rest of the board. +12 VDC connects through J21-1, +5VDC through J21-2 & 3, and
-12 VDC through J21-6. Common connections for the input voltages are connected to
J21-4 & 5. The ±12 VDC and +5 VDC are used on this board and also routed to the
other boards in the tray through this board. The +3.3 VDC for the microcontroller and
programmable logic array, mounted on the board, is provided by the voltage regulator
IC U6 from the filtered +5 VDC input. The output of U6 can be adjusted to +3.3 VDC
using R120.
(A9 & A10) Power Supplies used in CHV20B, CHV200B, and Driver for CHV400B
& higher power
Voltages for the operation of the boards in the tray are generated by (A9) a +5VDC and
±12VDC power supply and (A10) a +28/+42VDC power supply. The 230VAC input to
the tray connects through the AC power cord at J10, the power entry module located on
the rear panel of the tray.
An On/Off 10A/250VAC circuit breaker is part of the power entry module. With the
circuit breaker switched On, the (L) line input is wired to F1 a 10 Amp fuse for over
current protection. The AC lines are connected to terminal block TB1, which distributes
the AC to (A9 and A10) the two DC power supplies. There are two varistors, mounted
on TB1, connected from the line input to neutral and to ground for surge protection.
The AC also connects to the (A11) fan mounted on the rear panel of the driver trays, but
in the CHV20B system the fan is connected through the A10 power supply. In trays
other than the CHV20B, the fan will run when AC is applied to the tray and the circuit
breaker is switched On. The +5VDC and ±12VDC outputs of the (A9) power supply
connects to the terminal block (TB2) that distributes the DC to the boards in the tray.
Some of the +5VDC and ±12VDC outputs connect directly to the 8 VSB Demodulator
and 8 VSB Modulator boards while the other outputs connect through the CX Control
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Board to the IF Precorrector, the Digital Upconverter, the ALC, the Amplifier Assembly
and the Output Metering Detector Boards.
The +28/+42VDC outputs of the (A10) power supply connect to the (A8) CX Control
Board, which then supplies the switched +24/+42VDC to the (A6) Amplifier Assembly.
In CHV20B trays the DC output of the (A10) power supply also connects to the (A11) fan
mounted on the rear panel, which will operate when AC is applied to the tray, the On/Off
circuit breaker is On and the (A10) power supply is operating.
Circuit Description of External System Metering Board which is only used in
Transmitters with multiple external Amplifier Trays
(A5) System Metering Board (1312666)
The function of the System Metering Board is to detect forward and reflected output power
samples and generate output voltages that are proportional to the power levels of the
sampled signals for use by the control monitoring assembly in the exciter/driver tray.
There are two identical signal paths on the board: one for forward power and one for
reflected power. A sample of the forward output power, from the external (A11) output
coupler, enters the board at the SMA jack J3. The signal is filtered and connected to
resistors R5, R3 and R6 that form an input impedance-matching network to Pin 3 on U1.
The forward power signal is detected by the RF detector IC U1. The detected output at
pin 7 is split with one half connected to the forward average calibration pot R7, digital,
which adjusts the level of the signal connected to Pin 11 on U2. The other half of the split
is connected to the peak calibration pot R18, analog, which adjusts the level of the signal
connected to Pin 8 on U2. U2 is a Bilateral Switch IC whose output, digital or analog, is
controlled by the selection of the modulation type in the exciter/driver tray. In this BTC
transmitter the average, digital, output connects to the amplifier IC U3A that is wired to
the SYS_FWD and RMT_FWD Power Metering Outputs. A reading of 2 VDC measured at
TP1 is equal to a 100% Forward Power reading on the meter. The SYS_FWD level
connects to J9 on the board that is cabled to J11 on the exciter/driver tray for use in the
control monitoring assembly. The RMT_FWD level connects to J10 on the board for use by
remote control and monitoring.
A sample of the reflected output power, from the external (A11) output coupler, enters
the board at the SMA jack J8. The signal is filtered and connected to resistors R26, R22
and R27 that form an input impedance-matching network to Pin 3 on U6. The reflected
power signal is detected by the RF detector IC U6. The detected output at pin 7 is
connected to the reflected calibration pot R25, which adjusts the level of the signal
connected to the amplifier IC U3B that is wired to the SYS_RFLD and RMT_RFLD Power
Metering Outputs. A reading of 2 VDC measured at TP2 is equal to a 25% Reflected
Power reading on the meter. The SYS_RFLD level connects to J9 on the board that is
cabled to J11 on the exciter/driver tray for use in the control monitoring assembly. The
RMT_RFLD level connects to J10 on the board for use by remote control and monitoring.
+12 VDC enters the board at J9-1, from the exciter/driver tray and is connected through a
filter and isolation circuit consisting of C31, C14 and L5 before it is connected to the
regulator IC U5. U5 supplies the +5 VDC needed for operation of the ICs on the board.
The +5 VDC is connected through a filter circuit consisting of C15, C19 and C21 before it
is connected to the rest of the board.
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Circuit Descriptions of Boards in the CHV400, 400 Watt ATSC Amplifier Tray
(A7) Amplifier Control Board (1312260)
SW1
Amplifier Control Board
The Amplifier Control Board is mounted in the top front facing the rear of the Amplifier
Tray as shown above.
The Amplifier Control Board uses a Programmable logic device, U12, to control the
amplifier tray. It takes an enable signal from an external driver tray, and turns the
power supplies on whenever the driver has told it to turn on, unless it detects faults
internal to the tray. The board monitors the forward and reflected power, the heatsink
temperature, the pallet currents, and the power supply voltage and will generate alarm
signals if any of those parameters exceed safe limits. The amplifier tray has no front
panel display other than a two LEDs, one for Status and one for Enable. The board
sends all its output information, including the forward and reflected levels, back to the
driver tray, through J4, so the information can be displayed on that tray's LCD Display.
The board will generate a Red Blinking Status LED if it detects an alarm, fault, prompting
the operator to look at the LCD display on the driver tray to see what fault has occurred.
A CHVB transmitter System can have up to 4 external amplifier trays and since they are
all the same, without differences in the wiring harness, there needs to be a way to
identify which amplifier tray is which. The rotary switch SW1 is used to specify the
amplifier ID number which generates a unique serial address so that the individual
amplifier trays will respond when polled for information.
The +5 VDC inputs to this board are routed through J4-8 and J5-8. The +5 VDC inputs
are diode Or connected so that either the +5VDC from the (A8) power supply or the
+5VDC from the (A9) power supply will operate the board. The +5VDC is split with one
output connected to U1 a voltage regulator IC, which provides +5V and +5V_ANALOG as
outputs. The +5 VDC is filtered before being connected to the rest of the board. The
other +5 VDC output is connected to the regulator IC U2 that supplies +3.3 V to the
microcontroller and programmable logic array.
(A10) Current Metering Board (1309130)
The current metering board measures the current into the RF output amplifier pallets
and supplies this value to the control board. In the CHV400 amplifier tray, there are two
sensing circuits which are used. In the CHV750 amplifier tray, there are four sensing
circuits which are used. Each circuit has two parallel .01Ω series current sensing
resistors and a differential input IC that supplies a voltage output that is proportional to
the current for metering purposes. The +42VDC from the (A8) power supply connects
to TB2 and TB4 on the board. The +42VDC from the (A9) power supply connects to TB8
and TB10 on the board. The +42VDC input at the TB2 input senses the current to the
(A1) 878 output amplifier pallet through TB1 on the board. The +42VDC input at the
TB4 input senses the current to the (A2) 878 output amplifier pallet through TB3 on the
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
Board Descriptions
board. The +42VDC input at the TB8 input senses the current to the (A3) 878 output
amplifier pallet through TB7 on the board. The +42VDC input at the TB10 input senses
the current to the (A4) 878 output amplifier pallet through TB9 on the board.
The two or four sensing circuits are identical therefore only one will be described. For
the (A1) 878 amplifier pallet, the +42VDC from the (A8) switching power supply
connects to TB2. R1 and R2 are the parallel .01Ω current sensing resistors which
supplies the voltage values to the U1 current sense amplifier IC. R11 is a gain adjust,
which is adjusted to eliminate any rSense Error and to place the OpAmp output at 2.61V
for 40Amps sense as measured at TP3. The current sense output at J1-1 connects to
the (A7) control board for metering purposes.
(A5) 2 Way Splitter Board (1313941), in CHV400B
The 2 way splitter board takes the RF Input at J1 (≈12.5 Watts ATSC) on the board and
splits it into two equal outputs (≈5Watts ATSC) that connect to the inputs of the two
amplifier pallets at J1.
(A2 & A3) 500 Watt Amplifier Pallets (1313581)
There are two 500 Watt Amplifier Pallets mounted on the Amplifier Heatsink Assembly.
Each of the amplifier pallets has approximately +25dB of gain for the VHF HB frequency
range of 170 to 230 MHz. The pallets operate Class AB and generate 200 Watts ATSC
with an input of 1 Watt ATSC.
(A6) 2 Way Combiner Board (1313969), in CHV400B
The 2 way combiner board takes the two RF Inputs at J4 & J5 (≈200Watts ATSC) on the
board and combines them to a single output (≈400Watts) at J1 that connects to J2 the
7/16” (1.1cm) Din RF output jack of the tray.
(A8 & A9) CHV400B, 500 Watt, 750 Watt and 1000 Watt Amplifier Tray Power
Supplies
The 230VAC, needed to operate the tray, connects through the AC power cord at J3, the
power entry module located on the rear panel of the tray. The AC lines are connected to
a terminal block TB1 to which the circuit breaker(s) connect. There are two On/Off
20A/250VAC circuit breakers that are mounted on the back panel of the tray on either
side of J3 the AC input jack. NOTE: In CHV400B Amplifier tray there is one circuit
breaker. With the circuit breaker(s) switched On, the AC is distributed to the one (A8)
or two (A8 and A9) DC power supplies. In a standard CHV400B amplifier tray one 20
Amp circuit breaker CB1 connects the AC to the (A8) DC power supply. In all power
amplifier trays, TB1 has three varistors (VR1-VR3) connected across the AC input lines
for surge and over voltage protection. The AC input connected to TB1 is wired to 2 amp
fuses that is connected to the two fans (A11 & A12) mounted on the rear panel of the
tray. Both fans will run immediately when AC is applied to the tray.
The +5VDC for the operation of the amplifier control board in the tray is generated by
the (A8) or both the (A8 & A9) power supplies at J1-9 on each power supply. The
+5VDC from the (A8) power supply connects to J4-8 and the +5VDC from the (A9)
power supply connects to J5-8 on the control board. The +5VDC is produced when AC is
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
Board Descriptions
connected to the tray and the CB1 and/or the CB2 circuit breakers are turned On. Either
or both power supplies provides the +5VDC for use by the control board.
The +42VDC needed by the amplifier modules on the heatsink assembly is generated by
the (A8 & A9) power supplies in a 750 and 1000W amplifier trays. In a standard
CHV400 amp tray there is only the (A8) power supply. The power supplies will operate
when AC is connected to the tray, the CB1 circuit breaker for the (A8) power supply and
the CB2 circuit breaker for the (A9) power supply, are turned On and a Low is provided
on the Inhibit Line that connects to J1-6 on the power supplies from the control board.
The CB1 circuit breaker supplies the AC to the (A8) power supply which provides the
+42VDC to the (A2) and (A3) amplifier pallets. The CB2 circuit breaker supplies the AC
to the (A9) power supply which provides the +42VDC to the (A4) and (A5) amplifier
pallets.
(Optional) ASI to S310 Converter Module
NOTE: Used only with STL ASI feed inputs.
The ASI to SMPTE310M converter takes the STL ASI feed input, if present in your system,
and converts it to a SMPTE310M output which connects to the input to the Axcera system.
The converter contains an ASI Motherboard (1311179), an ASI to 310 Conversion Board,
Non-SFN (1311219) or ASI to 310 Conversion Board, SFN (1309764), and a 120 VAC to
+12 VDC converter module.
ASI Motherboard (1311179)
The ASI motherboard takes the +12 VDC, from the 120 VAC to 12 VDC converter
module, and converts it to +5 VDC and +3.3 VDC which are used by the ASI to S310
conversion board.
U1 is a regulator IC that supplies an output of +5 VDC at J2-7 that connects to the ASI
to 310 converter board. U2 is a regulator IC that supplies an output of +3.3 VDC at J211 that connects to the ASI to 310 converter board. Also +12 VDC is wired to J2-3 that
connects to the ASI to 310 converter board.
The ASI motherboard is the mounting platform for the four LEDs that are displayed on
the front of the module. The LEDs will be Green if everything is OK or Red if the
indicated function is malfunctioning. The LEDs are Power, which indicates +12 VDC is
connected to the converter, FIFO ERROR, which indicates an overflow or underflow
condition in the input buffer, S310 Lock, which indicates the converted S310 signal is in
a locked condition, and ASI Lock, which indicates the recovered ASI signal is in a locked
condition.
ASI to 310 Conversion Board, Non-SFN (1311219)
The ASI signal is input to the ASI to S310 conversion board via J1. U2 de-serializes the
ASI input signal into a parallel byte stream. The parallel byte stream is clocked into U6
which buffers and converts it to a valid S310 bi-phase encoded signal. Null packets are
added or dropped during this process to obtain the valid 19.393 Mb/s output. U6 is also
responsible for re-stamping the PCR clock. The final S310 output of the board is at J5.
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
Board Descriptions
ASI to 310 Conversion Board, SFN (1309764)
The ASI signal is input to the ASI to S310 conversion board via J1. U2 de-serializes the
ASI input signal into a parallel byte stream. The parallel byte stream is clocked into U6
which buffers and converts it to a valid S310 bi-phase encoded signal. For SFN
operation the ASI payload must be 19.392568 Mb/s ±2 ppm. A 38.785317 MHz VCXO
locks to the exact S310 bit-rate using a Digital PLL. This method ensures the extracted
S310 stream is frequency locked without modifying its content i.e. add/drop null
packets, PCR restamp, etc. The final S310 output of the board is at J5.
NOTE: In your system contains an (Optional) KTECH Receiver Tray, information on the
Tray is contained in the separate manufacturers supplied instruction manual.
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
System Set Up Procedure
This system was aligned at the factory and should not require additional adjustments
to achieve normal operation.
This Innovator CX Series system is of a tray design with multiple boards inside the
tray. If a board fails, that board needs to be changed out with a replacement board.
The failed board can then be sent back to Axcera for repair. NOTE: Contact Axcera
Customer Service Department at 1-724-873-8100 or fax to 1-724-873-8105, before
sending in any board or module.
R119
J1 (LO1)
J9 (LO2)
FREQ ADJ
Figure 14: (A4) Digital Upconverter Board (1309695)
Set Up of the LO1 and LO2 Samples on Upconverter Board
The following procedure should only be attempted if the Internal 10 MHz Reference is
used and the output carrier frequency is off. On the (A4) Digital Upconverter Board
(1309695), there are two Sample Jacks, J1 for LO1, 1GHz sample, and J9 for LO2,
the variable LO sample. Monitor the LO1 sample with a frequency counter and
adjust R119 to 1 GHz. The output carrier frequency should now be correct.
Technical Manual, Rev. 0
65
Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
S1
AUTO/MAN
TP1
1.0VDC
Figure 15: (A3) IF Pre-Corrector Board (1308796)
Set Up of the IF Precorrector Board in the System
Refer to Figure 15. Check that the Auto/Man switch S1 on the IF Pre-Corrector
Board is in the Automatic ALC position. This is the normal operating position for the
switch. The voltage at TP1 on the IF Pre-Corrector Board should be 1.0 VDC with
100% output power.
Refer to Figure 16. Check that the Auto/Man switch S1 on the ALC Board is in the
Automatic ALC position. (NOTE: The silkscreen is incorrect on Rev. A, B & C boards.
Auto position is with the bat to the left, toward J4.) Adjust R75 the ALC pot on the
ALC Board as needed to attain 100% output power. Switch to Manual Gain (Manual
ALC) and adjust the Manual Gain pot R62 for 100% output power. Switch the ALC
Board back to Automatic ALC.
R75
ALC ADJ
J4
R38
OVERDRIVE
THRESHOLD
S1
AUTO/MAN
R62
MAN ADJ
Figure 16: (A5) ALC Board (1308570)
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
ALC Board Set-Up, Forward and Reflected Power Calibration for CHV200B
Systems
NOTE: If your system is a CHV400B or higher power with one or more external
amplifier trays, refer to the next section for the forward and reflected power
calibration procedures.
Refer to Figure 16. Locate (A5) the ALC Board (1308570), in the preset the
Overdrive Threshold pot R38 full CW and set R62, Manual Adjust, and R75, ALC
Adjust, full CCW.
Switch S1 to Manual Gain, and increase the output power to 100% using R62.
Calibrate the system output power for 100% using R23, the Forward Calibration pot,
on the Output Detector Board. Refer to Figure 17.
R7
REFLECTED
CAL ADJ
R23
FORWARD
CAL ADJ
Figure 17: (A7) Output Metering Detector Board (1313747)
Technical Manual, Rev. 0
67
Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
R75
ALC ADJ
J4
R38
OVERDRIVE
THRESHOLD
S1
AUTO/MAN
R62
MAN ADJ
Figure 16A: (A5) ALC Board (1308570)
Refer to Figure 16A. Turn the output power down to 10% power with R62 on the
ALC Board. Remove the output RF connector from J2 on tray and calibrate the
reflected power to 10%, using R7, the Reflected Calibration pot, on the Output
Detector Board. Refer to Figure 17. Re-connect the RF output connector to the tray
and increase the power, in Manual gain using R62 on the ALC Board, to 115%.
Adjust the Overdrive pot R38 on the ALC Board, CCW until the overdrive threshold
just trips and the Overdrive Fault LED DS4 lights. Turn R38 slightly CW so that
power comes back up and DS4 goes out.
Switch S1 on the ALC Board to ALC. Turn the ALC Adjust pot R75 on the ALC Board
until the power is 100%. Switch S1 between ALC and Manual to verify smooth
switching, with minimal change in power. If necessary repeat the above procedure.
With the tray in ALC, use the ALC Adjust pot, R75, to decrease the power to 10%.
Remove the RF output connector from the tray. Verify that the VSWR Cutback LED,
DS6, comes on and the Reflected Power drops to approximately 6%. Reconnect the
RF output connector and increase the power back up to 100% using R75.
This completes the set up of the ALC board and the Forward and Reflected Power
Calibration.
Forward and Reflected Power Calibration of CHV400B and Higher Power
Systems with one or more External Amplifier Trays
NOTE: If your system is a CHV200B, refer to the previous section for the forward
and reflected power calibration procedures.
Connect a calibrated coupler and average reading power meter to the output of the
DTV mask filter. On the ALC Board (1308570), mounted in the Driver Tray, set the
Switch S1, Auto/Manual ALC, to the Manual position. Refer to Figure 13A. Adjust
the Manual adjustment Pot, R62, for the desired output power level as indicated on
the average reading power meter. In the Amplifier Tray, on the Amplifier Control
Board (1309822), refer to Figure 18; adjust the Forward Calibration Adjustment pot,
Technical Manual, Rev. 0
68
Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
R8, for a reading of 100% on the External Amplifier Forward Power screen of the LCD
display mounted on the Driver Tray.
R26 REFL CAL ADJ
R8 FWD CAL ADJ
Figure 18: (A5) Amplifier Control Board (1309822)
On the ALC Board (1308570), mounted in the Driver Tray, set the Switch S1,
Auto/Manual ALC, to the Auto position. Adjust the ALC adjustment Pot, R75, for a
reading of 100% on the External Amplifier Forward Power screen of the LCD display
mounted on the Driver Tray. This completes the forward power set up and
calibration adjustments.
On the ALC Board (1308570), mounted in the Driver Tray, adjust the ALC
adjustment Pot, R75, for a reading of 10% on the External Amplifier Forward Power
screen of the LCD display mounted on the Driver Tray. Disconnect the load or the
antenna connected to the system. In the Amplifier Tray, on the Amplifier Control
Board (1309822), adjust the Reflected Calibration Adjustment pot, R26, for a reading
of 10% on the External Amplifier Reflected Forward Power screen of the LCD display
mounted on the Driver Tray. Reconnect the load or the antenna to the system.
Adjust the ALC adjustment Pot, R75, for a reading of 100% on the External Amplifier
Forward Power screen of the LCD display mounted on the Driver Tray. This
completes the reflected power calibration adjustment.
6 MHz
-35 dB
-110 dB
3 MHz
6 MHz
Figure 19: Typical 6 MHz Digital Spectrum
Technical Manual, Rev. 0
69
Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
J14
W7
J13
W4
R126 Quad
#2 Threshold
R117 In Phase
#2 Magnitude
R69 Quad
#3 Threshold
R110 In Phase
#2 Threshold
R109 In Phase
#1 Threshold
R128 Quad
#3 Magnitude
R114 In Phase
#1 Magnitude
R129 Quad
#2 Magnitude
R24, R25 &R26
J4, J5 & J6
R125 Quad
#1 Magnitude
R67 Quad
#1 Threshold
Figure 20: (A3) IF Pre-Corrector Board (1308796)
Linearity Correction Adjustment (Non-Linear Distortions)
As shipped, the system was preset to include amplitude and phase pre-distortion. The
pre-distortion was adjusted to approximately compensate the corresponding
non-linear distortions of the Power Amplifier.
NOTE: Refer to Figure 20. On (A3) the IF Pre-Corrector Board (1308796), check that
the Quadrature Correction enable/disable jumper W7 on J14 and the In Phase
Correction enable/disable jumper W4 on J13 are in the Enable position, between pins 2
& 3.
Set up a spectrum analyzer with 30 kHz resolution bandwidth and 30 kHz video
bandwidth to monitor the intermodulation products of the RF output signal of the
Tray at J2. A typical 6 MHz digital spectrum is shown in Figure 16.
There are five Corrector stages, two in phase and three quadrature, with
adjustments located on the IF Pre-Corrector Board. Each stage consists of a
threshold and a magnitude stage. The adjustments are adjusted as needed to correct
for any amplitude or phase intermod problems. R109 and R110 are the in phase
threshold adjustments. R114 and R117 are the corresponding magnitudes. The
threshold adjustments control the point in the signal’s amplitude where the
correction increases the gain, and the magnitude controls how much the gain is
increased for each correction stage.
The quadrature adjustments provide predistortion for fixing Amplitude and Phase
Modulation distortion that occur in the amplifiers. R67, R126 and R69 are the
threshold adjustments, and R125, R129 and R128 are the corresponding
magnitudes. The above pots are adjusted for the greatest separation between the
digital signal and the intermod at the channel edges.
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
There is also a frequency response correction network on the board consisting of
R24-R26 and C14-C16. This has been factory set. Any adjustment of these controls
will result in having to reload taps into the digital modulator (See the Linearity
Correction Adjustment (Linear Distortions) section below).
Linearity Correction Adjustment (Linear Distortions)
As shipped, the digital linear precorrector is preset in the factory for optimal
performance of the system and output filter. This precorrection should not require
readjustment in the field.
However, in the event that field adjustment of the digital linear precorrection is
required, Axcera does offer an optional Precorrector Tap Converter (PTC) application.
This application allows the frequency response and group delay precorrection to be
adjusted using one of the following pieces of test equipment:
- Rohde & Schwarz EFA-53 Demodulator with the FIR Coefficient Readout option
- Tektronix VSA-5000 Vector Signal Analyzer
The PTC application allows tap settings to be downloaded from the test equipment to
a PC and then loaded into the Innovator CX through the serial interface. The
instructions included with the PTC application software provide the detailed setup
procedure.
If a problem occurred during the set up, help can be found by calling Axcera field
support at (724) 873-8100.
Technical Manual, Rev. 0
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Innovator CHV400BTD ATSC Transmitter
System Set Up Procedure
This page intentionally left blank.
Technical Manual, Rev. 0
72
APPENDIX A
Innovator,
CHV400BTD
ATSC Transmitter
System Drawings
Innovator CHV400BTD ATSC Transmitter
Appendix A, System
Drawings and Parts List
Innovator CHV400BTD Transmitter System
Drawing List
CHV400BTD Innovator 400 Watt VHF High Band Digital Transmitter
(Consists of a CHV20BTD Tray driving a CHV400B, 400W Amplifier Tray.)
CHV400BTD Typical Block Diagram....................................................... 1314095
CHV400BTD Typical Interconnect ......................................................... 1314096
Technical Manual, Rev. 0
A-1
APPENDIX B
Innovator,
CHV20BTD,
Driver Tray,
Subassemblies and Boards
Drawings
Innovator CHV400BTD ATSC Transmitter
Appendix B, CHV20BTD
Tray, Subassemblies & Boards
Drawings and Parts List
Innovator CXB Series Transmitter
CHV20BTD Driver Tray,
Subassemblies & Boards Drawing List
CHV20BTD Innovator 20 Watt Digital Transmitter (Used as a driver)
CHV20BTD Block Diagram ................................................................ 1314130
CHV20BTD Interconnect ................................................................... 1313984
Digital Modulator Board (Part of the Digital Modulator w/Power Conditioner 1309629)
Schematic.......................................................................................... 1304884
ALC Board
Schematic.......................................................................................... 1308571
IF Precorrector Board
Schematic.......................................................................................... 1308797
Power Conditioner Board (Part of the Digital Modulator w/Power Conditioner 1309629)
Schematic.......................................................................................... 1309405
Digital Modulator w/Power Conditioner (Contains a Digital Modulator Board 1304883
and a Power Conditioner Board 1309404)
Frequency Agile Upconverter Board
Schematic.......................................................................................... 1309696
Control Board, Innovator CXB
Schematic.......................................................................................... 1312544
Metering Board, CHV Driver
Schematic.......................................................................................... 1313748
Technical Manual, Rev. 0
B-1
Innovator CHV400BTD ATSC Transmitter
Appendix B, CHV20BTD
Tray, Subassemblies & Boards
Drawings and Parts List
VHF HB Coupler Assembly (Mounted in 20W Driver Amplifier Assembly 1313959)
Schematic.......................................................................................... 1313858
VHF HB Pre-Driver Assembly (Mounted in 20W Driver Amplifier Assembly 1313959)
Schematic.......................................................................................... 1313900
20 Watt Driver Amplifier Assembly (Contains a VHF HB Pre-Driver Assembly 1313899,
a 100 Watt Amplifier Pallet, Italmec 1313484, a VHF HB Coupler
Assembly 1313857, and an ALC Board 1308570).
Interconnect ...................................................................................... 1314107
100 Watt Amplifier Pallet, Italmec, 1313484 (Mounted in 20 Watt Driver
Amplifier Assembly 1313959)
Manufactured by Itelmec Parts List ................................................... PAVHF050A
Technical Manual, Rev. 0
B-2
APPENDIX C
Innovator,
CHV400B,
Amplifier Tray,
Subassemblies and Boards
Drawings
Innovator CHV400BTD ATSC Transmitter
Appendix C, CHV400B
Tray, Subassemblies & Boards
Drawings and Parts List
Innovator CXB Series Transmitter
CHV400B Amplifier Tray,
Subassemblies & Boards Drawing List
CHV400B Innovator 400 Watt Digital Amplifier Tray
CHV400B Block Diagram .................................................................. 1314132
CHV400B Interconnect ..................................................................... 1313994
Current Metering Board
Schematic................................................................................................ 1309131
Innovator CXB Amplifier Control Board
Schematic................................................................................................ 1312261
2-Way Splitter, VHF HB
Schematic................................................................................................ 1313942
2-Way Combiner, VHF HB
Schematic................................................................................................ 1313970
500 Watt Amplifier Pallet, Italmec, 1313581 (Two used in the CHV400B Amp Tray)
Manufactured by Itelmec Data Sheet ................................................ PAVHF500B
Technical Manual, Rev. 0
C-1
Innovator CHV400BTD ATSC Transmitter
Technical Manual, Rev. 0
Appendix C, CHV400B
Tray, Subassemblies & Boards
Drawings and Parts List
C-2

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