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

UBS-Axcera 400-Watt High-Band VHF Digital Transmitter

User manual

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 Technical Manual, Rev. 0 i January 7, 2010 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
Innovator CHV400BTD ATSC Transmitter Table of Contents Technical Manual, Rev. 0 ii January 7, 2010 (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
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 1 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. 4 3 2 1 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.
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 2 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.
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 3 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. What are your Name and the Call Letters for the station? 2. What are the model number and type of system? 3. Is the system digital or analog? 4. 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.
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 4 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.
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 5  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.
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 6 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. SKIN BLISTERED OR FLESH CHARRED: Apply ice cold water to burned area to prevent burn from going deeper into skin tissue. Cover area with clean sheet or cloth to keep away air. 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.
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 7 dBm, dBw, dBmV, dBµµµµV, & VOLTAGE EXPRESSED IN WATTS 50 Ohm System WATTS PREFIX dBm dBw dBmV dBµV VOLTAGE 1,000,000,000,000 1 TERAWATT +150 +120 100,000,000,000 100 GIGAWATTS +140 +110 10,000,000,000 10 GIGAWATTS +130 +100 1,000,000,000 1 GIGAWATT +120 + 99 100,000,000 100 MEGAWATTS +110 + 80 10,000,000 10 MEGAWATTS +100 + 70 1,000,000 1 MEGAWATT + 90 + 60 100,000 100 KILOWATTS + 80 + 50 10,000 10 KILOWATTS + 70 + 40 1,000 1 KILOWATT + 60 + 30 100 1 HECTROWATT + 50 + 20 50 + 47 + 17 20 + 43 + 13 10 1 DECAWATT + 40 + 10 1 1 WATT + 30 0 + 77 +137 7.07V 0.1 1 DECIWATT + 20 - 10 + 67 +127 2.24V 0.01 1 CENTIWATT + 10 - 20 + 57 +117 0.707V 0.001 1 MILLIWATT 0 - 30 + 47 +107 224mV 0.0001 100 MICROWATTS - 10 - 40 0.00001 10 MICROWATTS - 20 - 50 0.000001 1 MICROWATT - 30 - 60 0.0000001 100 NANOWATTS - 40 - 70 0.00000001 10 NANOWATTS - 50 - 80 0.000000001 1 NANOWATT - 60 - 90 0.0000000001 100 PICOWATTS - 70 -100 0.00000000001 10 PICOWATTS - 80 -110 0.000000000001 1 PICOWATT - 90 -120 TEMPERATURE CONVERSION °°°°F = 32 + [(9/5) °°°°C] °°°°C = [(5/9) (°°°°F - 32)]
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 8 USEFUL CONVERSION FACTORS TO CONVERT FROM TO MULTIPLY BY mile (US statute) kilometer (km) 1.609347 inch (in) millimeter (mm) 25.4 inch (in) centimeter (cm) 2.54 inch (in) meter (m) 0.0254 foot (ft) meter (m) 0.3048 yard (yd) meter (m) 0.9144 mile per hour (mph) kilometer per hour(km/hr) 1.60934 mile per hour (mph) meter per second (m/s) 0.44704 pound (lb) kilogram (kg) 0.4535924 gallon (gal) liter 3.7854118 U.S. liquid (One U.S. gallon equals 0.8327 Canadian gallon) fluid ounce (fl oz) milliliters (ml) 29.57353 British Thermal Unit watt (W) 0.2930711 per hour (Btu/hr) horsepower (hp) watt (W) 746 NOMENCLATURE OF FREQUENCY BANDS FREQUENCY RANGE DESIGNATION 3 to 30 kHz VLF - Very Low Frequency 30 to 300 kHz LF - Low Frequency 300 to 3000 kHz MF - Medium Frequency 3 to 30 MHz HF - High Frequency 30 to 300 MHz VHF - Very High Frequency 300 to 3000 MHz UHF - Ultrahigh Frequency 3 to 30 GHz SHF - Superhigh Frequency 30 to 300 GHz EHF - Extremely High Frequency LETTER DESIGNATIONS FOR UPPER FREQUENCY BANDS LETTER FREQ. BAND L 1000 - 2000 MHz S 2000 - 4000 MHz C 4000 - 8000 MHz X 8000 - 12000 MHz Ku 12 - 18 GHz K 18 - 27 GHz Ka 27 - 40 GHz V 40 - 75 GHz W 75 - 110 GHz
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 9 RETURN LOSS VS. VSWR 1.001 1.01 1.1 2.0 VSWR 0 -10 -20 -30 -40 -50 -60 -70 RETURN LOSS dB
Innovator CHV400BTD ATSC Transmitter Introduction Technical Manual, Rev. 0 10 ABBREVIATIONS/ACRONYMS AC Alternating Current AFC Automatic Frequency Control ALC Automatic Level Control AM Amplitude Modulation AGC Automatic Gain Control ARD A-line, Regenerative Translator, Digital ATD A-line, Transmitter, Digital ATSC Advanced Television Systems Committee (Digital) AWG American Wire Gauge BER Bit Error Rate 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 dBmV Decibel referenced to 1 millivolt dBw Decibel referenced to 1 watt FEC Forward Error Correction FM Frequency Modulation FPGA Field Programmable Gate Array Hz Hertz ICPM Incidental Carrier Phase Modulation I/P Input IF Intermediate Frequency LED Light emitting diode LSB Lower Sideband 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 Vestigial Side Band
Innovator CHV400BTD ATSC Transmitter Unpacking and Installation Technical Manual, Rev. 0 11 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. 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 A1 Exciter/Driver A2 Power Amplifier A3 Power Amplifier The (Optional) UPS is located behind this blank panel
Innovator CHV400BTD ATSC Transmitter Unpacking and Installation Technical Manual, Rev. 0 12 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
Innovator CHV400BTD ATSC Transmitter Unpacking and Installation Technical Manual, Rev. 0 13 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. System O/P Power Power Consumption Voltage Current 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
Innovator CHV400BTD ATSC Transmitter Unpacking and Installation Technical Manual, Rev. 0 14 CHV1000B 1000 Watts 5100 Watts 230 VAC 22.2 Amps to the Cabinet CHV1500B 1500 Watts 7200 Watts 230 VAC 31.3 Amps to the Cabinet CHV2000B 2000 Watts 10000 Watts 230 VAC 43.5 Amps to the Cabinet CHV3000B 3000 Watts 14700 Watts 230 VAC 63.9 Amps to the 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. 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 Impedance J1 BNC Input A: On Channel RF Input (BRD) –78 to –8 dBm or SMPTE-310 Input (BTD) 50 Ohms J4 BNC SMPTE-310 Output (BRD Only) Normally jumpered to J5 50 Ohms J5 BNC SMPTE-310 Input (BRD Only) Normally jumpered to J4 50 Ohms J6 BNC 10 MHz Input: Optional External 10 MHz Reference Input 50 Ohms J7 BNC 1 PPS Input: Optional External 1 PPS Reference Input 50 Ohms J9 N RF Output: On Channel RF Output 50 Ohms J10 IEC AC Input: AC input connection to 85-264VAC Source and On/Off circuit breaker N/A J11 9 Pos Male D Power Monitoring: Interface to System and external amplifier trays, if present. Also provides an interlock for the Reject Load (if used). N/A J12 15 Pos Female D Remote: Remote control and status indications. Refer to Table 7 on pages 21 & 22 for information on the connections. N/A J13 RJ-45 Serial: Provides communication to System and to external amplifier trays, if present. N/A J14 RJ-45 Ethernet: Optional Ethernet connection. May not be present in your tray. N/A J15 Front Panel BNC 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. 50 Ohms J16 Front Panel 9 Pos Female D Serial: Used to load equalizer taps into the modulator. N/A J1 J11 J12 J10 J6 J9 J7 J4 J13 J5
Innovator CHV400BTD ATSC Transmitter Unpacking and Installation Technical Manual, Rev. 0 15 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. Figure 4: Rear View CHV500, CHV750 and CHV1000 Amplifier Tray Table 3: Connections for the CHV500, CHV750 and CHV1000 Amplifier Tray Port Type Function Impedance J1 N RF Input: On Channel RF from CHVB driver tray 50Ω J2 7/16” (1.1cm) Din RF Output: On Channel RF Output 50Ω J3 IEC AC Input: AC input connection to 230VAC Source N/A J4 9 Pos D Remote: Amplifier Control Interface (Connects to J11 on the exciter/driver tray) N/A J5 RJ-45 Serial data N/A J8 Front Panel BNC RF Sample: Output Sample from Combiner thru Control Board. In a CHV500B, the sample level is approximately 70dB down from the output power level of the tray. 50Ω 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. J1 J3 J4 J2 CB1CB2 J5
Innovator CHV400BTD ATSC Transmitter Unpacking and Installation Technical Manual, Rev. 0 16 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 17 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 18 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 Parameters for a CHV200 used as a Driver Parameter Typical Reading Forward Power 20-70% (Depending on output power level of system) Reflected Power <3% 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 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
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 19 Typical Problems, Indications and Causes in CHV200B Tray Problem Indication Cause No power to tray Operate/Standby and Enable LED indicators and LCD display are Off 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 No Output Signal Front Panel Status LED is Amber and blinking with no events, faults indicated. 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 Loss of Input on Modulator Menu Loss of input signal. Loss of Output Signal Amber Operate/Standby LED. Blinking Red Status LED. Any Event, Fault, which Mutes the output. Including Input Fault, VSWR Cutback, Overdrive, Overtemperature and Overvoltage. Loss of 42V Power Supply Fault on Power Supply Menu Power supply (A10) not operating Loss of ±12V or 5V Operate/Standby and Enable LED indicators and LCD display are Off Power supply (A9) not operating NOTE: *A spare 10 Amp fuse is provided in the blank fuse holder under the active fuse. 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 Figure 5: Front View CHV200B and the driver for the CHV400B & higher power systems Operate/Standby Buttons Status LED Left/Right Buttons LCD Display Enter Button Operate/Standby LED Up/Down Buttons J11 Serial Port J15 RF Sample
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 20 Table 4: Innovator CXB Series LCD Display DISPLAY FUNCTION LCD Provides a two line readout of the input received channel, internal 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. Up & Down Arrow Scrolls through the main menus and after entering the Main Menu Steps through submenus of the main menu when they are present. Left & Right Arrow Used to exit from main menus and submenus of the main menu when they are present. Table 6: Innovator CXB Series Operate/Standby and Status Indicators LED FUNCTION OPERATE/STANDBY (Green/Amber) A Green LED indicates that the system is in Operate. An Amber LED indicates that the system is in Standby. STATUS (Green/Red/ Amber) A Green LED indicates that the system is functioning normally. 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. 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. 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 (Green/Amber) A Green LED indicates that the system is in Operate and operating normally. An Amber LED indicates that the system is in Standby. Enable LED Status LED Sample
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 21 STATUS (Green/Red/ Amber) 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. JACK FUNCTION SAMPLE J6 Typical sample value is 65dB down from the output power level of the tray. (500 Watts output power = -8dBm sample level) System Remote Connections 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 Name Pin Designation Signal Type Description System Operate J12-1 Discrete Open Collector Input - A pull down to ground on this line indicates that the System is to be placed into the operate mode. (Low = Activate : Floating = No Change) Command System Standby J12-2 Discrete Open Collector Input - A pull down to ground on this line indicates that the System is to be placed into the standby mode. (Low = Activate : Floating = No Change) Command Power Raise J12-3 Discrete Open Collector Input - A pull down to ground on this line indicates that the Power of the System is to be Raised. (Low = Activate : Floating = No Change) Command Power Lower J12-4 Discrete Open Collector Input - A pull down to ground on this line indicates that the Power of the System is to be Lowered. (Low = Activate : Floating = No Change) Command System Interlock J12-5 Discrete Open Collector Input - A pull down to ground on this line indicates that the Interlock is present. (Low = OK : Floating = Fault) Set to Modulation Type J12-6 Discrete Open Collector Input. - Sets the Modulation type of the system. (Low = Analog : Floating = Digital) Command J12
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 22 Remote Signal Name Pin Designation Signal Type Description Set Channel (Set Up 1 or Set Up 2) J12-7 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. Command Ground J12-8 Ground System Forward Power Level J12-9 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. Metering System Aural Power Level J12-10 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) Metering System Reflected Power Level J12-11 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. Metering Report Input Status J12-12 Discrete Open Collector Output. - Indicates if input to system is Normal or Not. (Low = OK : Floating = Fault) Status Report Fault Status J12-13 Discrete Open Collector Output. - Indicates if system is Operating Normally or has a Fault. (Low = OK : Floating = Fault) Status Report Operate Status J12-14 Discrete Open Collector Output. – Indicates whether system is in Operate or Standby. (Low = Operate : Floating = Standby) Status Ground J12-15 Ground 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 23 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. 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. Left/Right Buttons Enter Button Up/Down Buttons
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 24 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 25 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 26 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 27 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 28 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 29 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 30 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 31 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 set-up 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 32 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 33 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 34 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
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 35 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.
Innovator CHV400BTD ATSC Transmitter Initial On Site Turn On Procedure Technical Manual, Rev. 0 36 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.
Innovator CHV400BTD ATSC Transmitter System Description Technical Manual, Rev. 0 37 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 (A6-
Innovator CHV400BTD ATSC Transmitter System Description Technical Manual, Rev. 0 38 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
Innovator CHV400BTD ATSC Transmitter System Description Technical Manual, Rev. 0 39 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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Innovator CHV400BTD ATSC Transmitter Web Ethernet Interface Description Technical Manual, Rev. 0 41 (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: admin Password: axcera
Innovator CHV400BTD ATSC Transmitter Web Ethernet Interface Description Technical Manual, Rev. 0 42 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.
Innovator CHV400BTD ATSC Transmitter Web Ethernet Interface Description Technical Manual, Rev. 0 43 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.
Innovator CHV400BTD ATSC Transmitter Web Ethernet Interface Description Technical Manual, Rev. 0 44 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: 192.168.0.1 Subnet Mask: 255.255.255.000 Default Gateway: 10.0.0.1
Innovator CHV400BTD ATSC Transmitter Web Ethernet Interface Description Technical Manual, Rev. 0 45 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.
Innovator CHV400BTD ATSC Transmitter Web Ethernet Interface Description Technical Manual, Rev. 0 46 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.
Innovator CHV400BTD ATSC Transmitter SNMP Ethernet Interface Description Technical Manual, Rev. 0 47 (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 Board Descriptions Technical Manual, Rev. 0 49 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 SMPTE-310M 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 SW1-1 Tuner Type Original Tuner (DTT765xx) Recent Tuner (DTT7680x) SW1-2 Signal Strength Gain Gain = 8.0 Gain = 9.3 SW1-3 Special Channel Plan Normal Channels 2, 3, or 4 are offset 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.
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 50 (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.
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 51 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. J2IF Input0 dBm Pk PwrPinAttenuator In Phase In Phase SplitterQuad Quad QuadCombinerAmplitude and Phase CorrectionInput andModulationDetectorsInput FaultIndicatorVideo LossIndicatorFront PanelALCInputFaultModulationLossLevelDetectorTP1 = 1VFrequencyResponseCorrectorFrequencyResponseCorrectorFrequencyResponseCorrectorJ1IFOutput (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-
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 52 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 Pre-Correctors. 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
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 53 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 unity-gain 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.
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 54 The output of U3B connects through S1 pins 2 to 3, if it is in the ALC position, to the pin-diode 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 peak-detected 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
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 55 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 pre-corrector stages. J6IF InputMixer MixerJ7RF Output1 GHzTCXOFract-N PLLInteger-N PLLInteger-N PLL10 MHzTCXOExternal10 MHzDetectionJ10External10 MHz InputVCO 1VCO 2Band Switchingfrom Ext Control1 GHz1.1-1.9 GHz (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).
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 56 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. Pin AttenuatorJ1RF InputInput LossDetectorAuto/Man SelectALCTP4Mute from Control CircuitJ2RF OutputTP1Overdrive DetectOutput PowerReflected PowerInput PowerReference (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
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 57 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
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 58 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.
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 59 (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
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 60 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.
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 61 Circuit Descriptions of Boards in the CHV400, 400 Watt ATSC Amplifier Tray (A7) Amplifier Control Board (1312260) 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 SW1
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 62 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
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 63 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 J2-11 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.
Innovator CHV400BTD ATSC Transmitter Board Descriptions Technical Manual, Rev. 0 64 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.
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 65 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. 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. J1 (LO1) J9 (LO2) R119 FREQ ADJ
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 66 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. Figure 16: (A5) ALC Board (1308570) S1 AUTO/MAN S1 AUTO/MAN TP1 1.0VDC J4 R75 ALC ADJ R62 MAN ADJ R38 OVERDRIVE THRESHOLD
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 67 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. Figure 17: (A7) Output Metering Detector Board (1313747) R23 FORWARD CAL ADJ R7 REFLECTED CAL ADJ
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 68 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, R38 OVERDRIVE THRESHOLD S1 AUTO/MAN R75 ALC ADJ R62 MAN ADJ J4
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 69 R8, for a reading of 100% on the External Amplifier Forward Power screen of the LCD display mounted on the Driver Tray. 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 dB3 MHz 6 MHz Figure 19: Typical 6 MHz Digital Spectrum R8 FWD CAL ADJ R26 REFL CAL ADJ
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 70 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. J13 W4 R67 Quad #1 Threshold J14 W7 R126 Quad #2 Threshold R24, R25 &R26 J4, J5 & J6 R69 Quad #3 Threshold R125 Quad #1 Magnitude R129 Quad #2 Magnitude R128 Quad #3 Magnitude R117 In Phase #2 Magnitude R110 In Phase #2 Threshold R109 In Phase #1 Threshold R114 In Phase #1 Magnitude
Innovator CHV400BTD ATSC Transmitter System Set Up Procedure Technical Manual, Rev. 0 71 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.
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APPENDIX A Innovator, CHV400BTD ATSC Transmitter System Drawings
Innovator CHV400BTD ATSC Transmitter Appendix A, System Drawings and Parts List Technical Manual, Rev. 0 A-1 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
APPENDIX B Innovator, CHV20BTD, Driver Tray, Subassemblies and Boards Drawings
Innovator CHV400BTD ATSC Transmitter Appendix B, CHV20BTD Tray, Subassemblies & Boards Drawings and Parts List Technical Manual, Rev. 0 B-1 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
Innovator CHV400BTD ATSC Transmitter Appendix B, CHV20BTD Tray, Subassemblies & Boards Drawings and Parts List Technical Manual, Rev. 0 B-2 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
APPENDIX C Innovator, CHV400B, Amplifier Tray, Subassemblies and Boards Drawings
Innovator CHV400BTD ATSC Transmitter Appendix C, CHV400B Tray, Subassemblies & Boards Drawings and Parts List Technical Manual, Rev. 0 C-1 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
Innovator CHV400BTD ATSC Transmitter Appendix C, CHV400B Tray, Subassemblies & Boards Drawings and Parts List Technical Manual, Rev. 0 C-2

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