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Technalogix TAU-100 Manual

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TAU-100
POWER AMPLIFIER
NEW
ADVENTURES
IN
BROADCASTING

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Summary of Contents for Technalogix TAU-100

  • Page 1 TAU-100 POWER AMPLIFIER ADVENTURES BROADCASTING...
  • Page 2 No? Okay, good. Please take a few minutes to read the manual and familiarize yourself with your new Technalogix power amplifier. We believe that this manual, and of course our equipment, should be everything you need to get on the air with superb broadcast quality video.

  • Page 3: Table Of Contents

    Table of Contents I- S ....................I-1 ECTION AFEGUARDS .....................I-2 AFETY AND IRST ....................I-3 PERATING AFEGUARDS ..................... II-1 ECTION ARRANTY ....................III-1 ECTION VERVIEW .....................III-1 TANDARD EATURES ....................III-2 RINCIPLE OF PERATION ......................III-3 LOCK IAGRAM .......................III-5 PECIFICATIONS - RF C ................IV-1 ECTION OMPONENTS .......................
  • Page 4 ..............VIII-3 LECTRICAL ERVICE ECOMMENDATIONS ..............VIII-4 NTENNA AND OWER ECOMMENDATIONS ......................VIII-5 HELTER ECURITY ..................VIII-6 NPACKING AND NSPECTI O N (TAU-100 P OCATION AND UNCTION OF ONTROLS AND ONNECTORS OWER )........................VIII-7 MPLIFIERS )..VIII-9 OCATION AND UNCTION OF ONTROLS AND ONNECTORS OWER UPPLY ......................VIII-11...

  • Page 5: Section I- Safeguards

    Section I - Safeguards General Safeguards This section is written as a general guide to keep all 5 fingers on your hand and is intended for those having previous knowledge and experience with these kinds of equipment. It is not intended to contain a complete statement of all safety precautions, which should be observed by personnel using this or other electronic equipment.

  • Page 6: Safety And First Aid

    Safety and First Aid Personnel engaged in the installation, operation, maintenance, or servicing of electronic equipment are exposed to the hazard of high voltage. It is imperative that all safety regulations and precautions are consistently observed. Knowledge of first aid procedures is recommended. The following information is presented as a reference only.

  • Page 7: Operating Safeguards

    Operating Safeguards It is a known fact that our broadcast transmitters and translators enjoy 50-ohm load impedances. So much so, that it is imperative you maintain 50-ohm impedances throughout your system. In return, your equipment will provide you with maximum power transfer to the antenna and decreased reflected power heading back towards the amplifier pallets, reducing the amount of magic smoke that gets let out of the power amplifier.

  • Page 8: Section Ii - Warranty

    Technalogix Ltd. will not be liable for damages of whatever nature arising out of or in connection with the equipment or its use thereof. Technalogix does not assume responsibility for injury or damage resulting from the practices of untrained or unqualified personnel in the handling of this equipment.
  • Page 9 Contact Technalogix and describe the problem in as much detail as possible. See troubleshooting section in this manual. If a solution cannot be found at this time, it may be determined that the unit will have to be returned to Technalogix for repair, once a Return Materials Authorization (RMA) number is provided.

  • Page 10: Section Iii - Overview

    Section III - Overview Standard Features • No sync compression to ensure power amplifier is digital compatible • Narrow output bandpass filter allows adjacent channel operation • Front panel Liquid Crystal Display (LCD) to monitor forward and reflected RF power, and DC voltage •...

  • Page 11: Principle Of Operation

    Principle of Operation The TAU-100 power amplifier supplies a 100 watt peak video signal with 10% aural power on any of the UHF television channels 14 through 69. Please note that channel selection must be made at time of order, as the transmitter or translator is calibrated and tested to the channel requested and is not field tuneable.

  • Page 12: Block Diagram

    Block Diagram The RF signal enters through the RF Input connector on the power amplifier enclosure from the modulator or processor. It then passes through an RF attenuator to limit the output power level of the power amplifier and to help buffer any transients that may come into the power amplifier. After attenuation, the signal is amplified through the UHFTV-10 driver and UHFTV-150 T final pallets before the signal passes through an isolator (circulator with load) and a bandpass filter.
  • Page 13 FILTER UHFTV-10 UHFTV-150 DIRECTIONAL CIRCULATOR COUPLER ATTENUATION RF INPUT RF OUT To Wattmeter and Antenna A=-0.2dB typ. A=-0.1dB A=+26dB min. A=+12dB min. A=-0.3dB 50-OHM TERMINATION TAU-100 Block Diagram Date: May 24, 2005 Page: 1 of 1...

  • Page 14: Specifications

    For this reason, we recommend that any different modulator/processor be shipped to Technalogix so the system can be matched and set up optimally. In addition, the audio/video ratio the input to the power amplifier needs to be –10 dB in order for the software and LCD readout to be accurate.
  • Page 15 Aural Characteristics Input Level for 25 kHz Deviation 0.3 V Frequency Response (Standard Pre-emphasis) ±1 dB Harmonic Distortion (25 kHz Deviation) < 1% 50 Hz to 15 kHz Amplitude Modulation Noise > 50 dB Frequency Modulation Noise > 60 dB Intercarrier Stability ±250 Hz Physical Characteristics...

  • Page 16: Section Iv - Rf Components

    Section IV – RF Components Amplifier Pallets The UHFTV-10 pallet is a two stage ultra linear class-A linear pallet. It has a minimum gain of 38dB and draws no more than 2.75Adc total drain current (the exact bias and drain currents of your system are found in the spec sheet supplied with each manual).

  • Page 19: Directional Coupler

    Directional Coupler The Technalogix dual directional couplers provide DC voltages proportional to forward and reflected RF power monitoring. These analog voltages are converted for processing using a 10-bit analog to digital converter.

  • Page 20: Section V - Power Supply Section

    Section V – Power Supply Switching AC-DC power supplies are used to power the amplifier pallets, the control circuits, and all of the fans. There is (1) power supply used to generate the necessary current for the amplifier pallets, set to 28.3 Vdc nominally.
  • Page 21 MEAN WELL SP-500 SWITCHING POWER SUPPLY SERIES ISO-9001 CERTIFIED MANUFACTURER .LOW COST, HIGH RELIABILITY .COMPACT SIZE, LIGHT WEIGHT .COOLING FAN ON/OFF AUTOMATICALLY .100% FULL LOAD BURN-IN TEST .BUILT IN REMOTE CONTRAL C OUTPUT CAPACITOR .105 º .INTERNATIONAL AC INPUT RANGE .BUILT IN EMI FILTER, LOW RIPPLE NOISE .HIGH EFFICIENCY, LOW WORKING TEMPERATURE .BUILT IN PFC CIRCUIT...

  • Page 23: Section Vi - Monitor And Control System

    Section VI – Monitor and Control System Control Board Overview (Series II-H) The control printed circuit boards (PCB) are located at the front of each enclosure connected directly to the back of the liquid crystal displays (LCD) and are identified as Series II-H PCBs. The main purpose of the Series II-H PCB is to monitor the RF power and the DC supply voltages in the power amplifier and filter enclosures and to monitor just the DC supply voltages in the power supply enclosure.

  • Page 24: Interface Components

    Interface Components The interface section of the Series II-H PCB includes the front panel switch interfacing in addition to the buzzer and carrier disable output circuits. The (3) momentary switches found on the front panels of each enclosure are tied to the microcontroller through an isolation stage to avoid any static discharge or noise on the switch wiring from reaching the microcontroller.
  • Page 25 simply turns off the buzzer. The carrier disable circuit simply applies a shutdown voltage to the driver pallet in the system. The U14 generates the signal out of pin 21 and controls relay Q2 through R17. When Q2 is turned off, the shutdown voltage to the driver is floating and the carrier is on.

  • Page 26: Signal Conditioning Components

    Signal Conditioning Components The signal processing section of the Series II-H PCBs is used to buffer potentially noisy or damaging signals from the ADC. Power supply samples and forward and reflected power from a directional coupler are then digitized. Firstly, all analog signals are protected with a resettable fuse and transient voltage suppressor (TVS) combination.

  • Page 27: Display Components

    Display Components The display section of the Series II-H PCB is comprised of the LCD and the components that make up the data bus to send the data from the microcontroller to the LCD. Specifically, the LCD is an alphanumeric 20X4 display that uses the industry standard 44780 controller and a parallel interface for data communications.

  • Page 28: Microcontroller Components

    Microcontroller Components The heart of the monitor and control system found in Series II-H PCBs is microcontroller U14. This microcontroller analyzes all RF power levels and voltages to ensure that all operating parameters are within their predetermined safe operating levels. If a fault is found, appropriate action is taken to help protect the system from damage, which may include turning the RF carriers off.

  • Page 29: Fault Shutdown

    Fault Shutdowns On the LCD (Liquid Crystal Display) the following messages may appear: If you see this message, the system will: shut amp down for 1 minute automatically turn amp on after 1 minute and check again for overdriven amplifier come back to the same power level that it was set If you see this message, the system will: shut amp down for 5 minutes...

  • Page 30: Remote Port

    Remote Port The remote port allows external control of the transmission system via the DB25 connector on each enclosure. All functions on the remote port are simply hard-wired or paralleled to existing wiring to provide a secondary method of control to the user, and are activated as follows: pin 1: ground to reset microcontroller, float otherwise pin 2: ground for 2 seconds to toggle carrier on/off, float otherwise pin 3: common ground...
  • Page 31 Series II - Bill of Materials revision: Optional part depending on power level of TV or FM date: 2-Dec-04 Item Qty Components Description Tolerance Package Equivalency Challenge Electronics TDB05; Global Components BUZZER, magnetic, 5V, single tone Through hole TDB05, Tranducers USA TRIE-1205P C1 (solder side), C5 Panasonic ECE-V1JA101P, NIC (solder side)

  • Page 32: Bill O F Materials

    Series II - Bill of Materials revision: Optional part depending on power level of TV or FM date: 2-Dec-04 RESISTOR, 4.99 kohm, 1/10 watt, thick film SMD 0805 Panasonic ERJ-6ENF4991V RESISTOR, 2.7 KOHM, 1/10 watt, thick R26 (next to VR2) film SMD 0805 RESISTOR, 680 OHM, 1/10 watt, thick...
  • Page 33 SERIES II, REV. H - Control System Vin Cond Feedbk 1 Vin +5Vdc Vout 0805 CHIP ELECTROLYTIC NEAR BUZZER ELECTROLYTIC SOLDER SIDE Feedbk 2 Vin Pin15LCD Vout COMPONENT SIDE ELECTROLYTIC SOLDER SIDE ELECTROLYTIC SOLDER SIDE BK LT BkLtCtrl CTRL SELECT +8V OUT 1206 CHIP NEAR POW.
  • Page 34 SERIES II, REV. H - Control System +5Vdc PWR In +5Vdc VW uPC PWR uPC VW In +5Vdc NAV In NC(RC6) SEL In PIN17uPC +5Vdc RES uPC RES In J3 5 Ground J4 3 +5Vdc Buzzer Buzzer delete +5Vdc +5Vdc Rly.
  • Page 35 SERIES II, REV. H - Control System Isoltd 8 Analog 8 SOLDER SIDE 1206 CHIP For U7 Isoltd 7 Analog 7 Isoltd 6 Analog 6 SOLDER SIDE 0805 CHIP Isoltd 5 Analog 5 SOLDER SIDE 0805 CHIP 0805 BESIDE Isoltd 4 Low Threshold Adjust Isoltd 3 Analog 3...
  • Page 36 SERIES II, REV. H - Control System +5Vdc Isoltd 1 Isoltd 2 1210 CHIP SOLDER SIDE 0805 NEAR U8 0805 NEAR U8 0805 CHIP Isoltd 3 COMP. SIDE Low Thresh Pin 3 on U9 is left Isoltd 4 unconnected on PCB Vref ConvStrt Cref...
  • Page 37 SERIES II, REV. H - Control System Pin3LCD Pin15LCD BkLtCtrl +5Vdc DfromUPC Dclk Latch1CS Latch2CS uPCPIN14 U11: LCD control signals, LCD backlight control, and External interface outputs U12: LCD data bus (D0...D7) D0...D7 is text or instruction A. Sivacoe Series II: Control System LCD Section Date: March 8, 2004 Page: 1 of 1...
  • Page 38 SERIES II, REV. H - Control System Reset Reset +5Vdc Dclk DfromUPC CONVST MCLR/Vpp DtoUPC Dig.Out1 Latch1CS Dig.Out2 Latch2CS RB0/INT Rly.Ctrl Buzzer OSC1/CLKin OSC2/CLKout RC0/T1CKI RC7/RX/CK Dig.In 3 RC1/CCP2 RC6/TX/CK OSC1 RC2/CCP1 RC5/SD0 OSC2 RC3/SCK/CLRC4/SDI/SDA Dig.In 2 Dig.In 1 *HOLD A.

  • Page 39: Section Vii - Mechanical Section

    Section VII – Mechanical Section The heat sink allows the amplifiers to operate at a cooler temperature and prevents overheating, which helps the longevity of the entire system. The heat sink has hollow fins, which help dissipate the heat from the amplifiers faster than a conventional serrated or corrugated fin. In addition to the cooling effects of the heat sink, there is a fan that provides 110 cubic feet per minute (CFM) of air flow (into zero static pressure).

  • Page 40: Section Viii - Installation

    A sloping roof will tend to develop leaks less rapidly. The building should be well roofed with good material. The cooling load will be lowered with reflective or light colored roofing material. Technalogix Ltd VIII-1...

  • Page 41: Heating And Cooling Requirements

    The environment’s temperature will contribute greatly to the length of the power amplifier’s life. Technalogix recommends that the building’s filtered air intake must have capacity for all air-flow in the building plus an additional 20%. Keep the intake below the roofline to avoid intake of solar heated air.

  • Page 42: Electrical Service Recommendations

    • You are apt to get better overall support if you give what business you can to local suppliers Technalogix recommends that proper AC line conditioning and surge suppression be provided on the primary AC input to the power amplifier. All electrical service should be installed with your national electrical code in your area, any applicable provincial or state codes, and good engineering practice.

  • Page 43: Antenna And Tower Recommendations

    Technalogix provides complete turnkey antenna systems if needed. If your site is serving as a translator, your receiving antenna should be in line of sight to the originating station all year round.

  • Page 44: Shelter Security

    Check the soil runoff conditions that may slow or hasten wind or water erosion and other concerns that may be unique to your location. Technalogix Ltd VIII-5...

  • Page 45: Unpacking And Inspection

    Claims for loss or damage may not be withheld from any payment to Technalogix, nor may any payment due be withheld pending the outcome thereof. Technalogix cannot guarantee the carrier’s performance.

  • Page 46: Location And Function Of Controls And Connectors

    Location and Function of Controls and Connectors (TAU-100 Power Amplifier) The following illustration depicts the location of the connectors when installing the 100-watt power amplifier (TAU-100). Technalogix Ltd VIII-7...
  • Page 47 10-ampere resettable circuit breaker is used to protect against inrush currents and high current draw from switching power supply. The thermal circuit breaker is a single pole configuration. AC ON/OFF - AC rocker switch (SPST) to supply AC to the AC-DC switching power supply Technalogix Ltd VIII-8...

  • Page 48: Initial Hook Up

    6. Ensure that the video modulation level is set to 87.5% with the video signal supplied, as described in the appropriate modulator/processor manual (will be factory set). 7. Connect the transmitting antenna cable to the RF OUT N -type connector on the power amplifier enclosure RF output. Technalogix Ltd VIII-9...

  • Page 49: Section Ix - Operating Procedure

    100 power amplifier is ready to receive a properly modulated video and audio signal, proceed with the following steps to place the system in operation. The TAU-100 power amplifier has been factory aligned for channel frequency (per system specification), signal levels and optimum performance.
  • Page 50 10. The TAU-100 LCD shows the user the present status of the amplifiers. Adjust RF output power to desired level (see Important RF Power Notice in previous section). Verify that the FWD Power reads 80 to 100 Watts on the filter enclosure - depending on signal content. The system is set up for 100 watts peak visual power using the sync and blanking signal and should read 100 watts FWD Power on the LCD under this condition only.

  • Page 51: Section X - Maintenance And Troubleshooting

    Section X – Maintenance and Troubleshooting Periodic Maintenance If your unit employs a filter on the air inlet for the fans, the filter should be cleaned every 30 days. If the equipment is operated in a severe dust environment, the filters on the inlet fan may need to be cleaned more regularly.

  • Page 52: Troubleshooting

    Troubleshooting The first and most important aspect of troubleshooting anything is to be systematic. Note where you have looked and what you found. Look first for the obvious. • Make a physical inspection of the entire facility. Are all necessary connections properly made? Do you see any signs of obvious damage within the equipment? •...
  • Page 53 Symptom Possible Fault Correction Weak output or picture Low level input signal Verify presence and level of input signal Low output power Verify power amplifier output with wattmeter and dummy load Incorrect modulation depth Adjust to meet specification High reflected power Incorrect load Ensure amplifier connected to transmission line...
  • Page 54 Thank you for choosing Technalogix Ltd.

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