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Technalogix TAV-25 Instruction Manual

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TAV-25
POWER AMPLIFIER
NEW
ADVENTURES
IN
BROADCASTING

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Summary of Contents for Technalogix TAV-25

  • Page 1 TAV-25 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 ..................VIII-1 ECTION NSTALLATION ..................VIII-1 UILDING ECOMMENDATIONS ..............VIII-2 EATING AND OOLING EQUIREMENTS ..............VIII-3 LECTRICAL ERVICE ECOMMENDATIONS ...............VIII-4 NTENNA AND OWER ECOMMENDATIONS .....................VIII-5 HELTER ECURITY ..................VIII-6 NPACKING AND NSPECTION (TXV-25 P OCATION AND UNCTION OF ONTROLS AND ONNECTORS OWER ).........................VIII-7 MPLIFIERS ......................VIII-11 NITIAL ..............

  • 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 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. Please look under our web site (www.technalogix.ca) for the RMA form (Service) and fill it out.

  • Page 10: Section Iii - Overview

    Section III - Overview Standard Features • Narrow output bandpass filter allows adjacent channel operation • Front panel Liquid Crystal Display (LCD) to monitor forward and reflected RF power, and DC voltage • Microcontroller-based monitoring and control ensures amplifier will never be overdriven and high VSWR will not damage amplifier •...

  • Page 11: Principle Of Operation

    Principle of Operation The TAV-25 power amplifier supplies a 25-watt peak video signal with an aural carrier level 10 to 13 dB below visual carrier (dBc) on any of the VHF television channels 2 through 13. 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 VHFTV-25 driver before the signal passes through a bandpass filter.
  • Page 13 CIRCULATOR COUPLER ATTENUATOR RF INPUT RF OUT TO WATTMETER AND ANTENNA A=-0.05dB typ. A=-0.5dB typ. A=+40dB typ. low band VHF A=+34dB typ. high band VHF A=-0.6dB typ. 50-OHM TERMINATION TAV-25 Block Diagram Date: May 23, 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 Intercarrier Stability ±250 Hz Physical Characteristics Power Requirements 115 V , 4 A 230 V , 2 A TAV-25 Power Amplifier AC or Operating Temperature 0 - 50°C Dimensions TAV-25 Power Amplifier W-19" flange (17” encl.) , D-21.25", H-5.25” (3U)

  • Page 16: Section Iv - Rf Components

    Section IV – RF Components Amplifier Pallets The VHFTV-25 pallet is a two stage ultra linear class-A linear pallet. The VHFTV-25-L has a typical gain of 40dB and the VHF TV-25-H has a typical gain of 34dB. These pallets draw no more than 3.0Adc total drain current (the exact bias and drain currents of your system are found in the spec sheet supplied with each manual).
  • Page 17 TECHNALOGIX LTD. 25 W UHF HI BAND DRIVER P25-UHF R.S. MCDONALD 14 SEPTEMBER, 2000...
  • Page 18 TECHNALOGIX LTD. 25 W UHF LO BAND DRIVER P25-UHF-L R.S. MCDONALD 14 SEPTEMBER, 2000...

  • 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 analog-to-digital converters and provide the control system with valuable data for monitoring purposes. The directional...

  • 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 31.0 Vdc nominally.
  • Page 21 S - 2 4 0 240W Single Output Switching Power Supply s e r i e s Features : Auto switched 88 ~ 264VAC input Built-in passive PFC choke Protections:Short circuit/Over load/Over voltage/Over temperature Forced air cooling by built-in DC fan Built-in cooling Fan ON-OFF control LED indicator for power on Fixed switching frequency at 75KHz...
  • Page 22 S - 2 4 0 240W Single Output Switching Power Supply s e r i e s Mechanical Specification Case No. 911 Unit:mm 159.5 139.5 49.5 4-SO M3 L=6 Air flow direction 171.25 3-M4 L=6 Terminal Pin. No Assignment Pin No. Assignment Pin No.

  • Page 23: Section Vi - Monitor And Control System

    Section VI – Monitor and Control System Control System Overview (Insight) The Insight control system is used for a variety of functions, the most important of which is ensuring that the transmitter continues to operate in a safe manner. The control system also allows the user to monitor and control the transmitter from both the front panel and the remote access port.

  • Page 24: Coupler Conditioning Module

    monitored by U101 to U105, buffered by U106 to U108, and sent to the analog to digital converter integrated into the microcontroller. There are five circuits for which the current is monitored by this system. As the DC supply passes through the user interface module, it undergoes filtering to ensure that the supply to the pallets is as clean as possible.

  • Page 25: Rf Conditioning Module

    RF Conditioning Module The RF conditioning board is located at the RF input of the amplifier. Its main function is to act as a variable attenuator, so that the control system can add attenuation to the input of the amplifier in order to limit the output power of the transmitter.

  • Page 26: Remote Port

    Remote Port The remote port allows external control of the transmission system via the DB25. The functions of each pin on the remote port are indicated in the following table: Pin Number Description Ground Forward power sample Reflected power sample Carrier off Carrier on Increase carrier level (level must have been decreased)

  • Page 27: Fault Shutdown

    Fault Shutdowns On the LCD (Liquid Crystal Display) the following messages may appear: If you see this message, the system has been driven to a power level higher than it is rated for. This message will likely only appear momentarily, before the amplifier will add attenuation at its input to bring the output power to a safe level.
  • Page 28 Monitor and Control System (Insight) Bills of Materials Circuit: User Interface Module Revision: 1.03 Designations Description Package Manufacturer Mfg. Part Number IC MICROCONTROLLER 256 BYTE U112 64QFP Texas Instruments MSP430F135IPM C106, C107, C117, C118, C128, C129, C141, C142, C148, C149, C163 CAPACITOR 0.01 uF 50V 10% 0805 Yageo...
  • Page 29 L106, L107, L108, L109, L110 INDUCTOR 0.01uH 1210 NLV32T-010J-PF Y101 6.00 MHz CRYSTAL Citizen HCM49-6.00 U111 IC SUPERVISOR 2.70V LOW SOT23 Microchip Technology MCP130T-270I/TT U114 IC TXRX 3.3V CAN 8-SOIC Texas Instruments SN65HVD232D U113 IC CAN CONTROLLER W/SPI 18-SOIC Microchip Technology MCP2510-I/SO U115 IC REG SIMPLE SWITCHER...
  • Page 30 Circuit: Coupler Conditioning Revision: 1.04 Designations Description Package Manufacturer Mfg. Part Number C201, C203, C204, C205, C208, C209, C212, C213, C214, C215, C216, C217, C218, C219, C220, C221, C222, C223, C224, C225, C226, Capacitor, ceramic, 0.01uF, 50Vdc, C227, C228, C229 +/-20% SMD 0805 Kemet...
  • Page 31 IC, microcontroller, 16-bit, 16k X 8 U202 program, 48 I/O, flash 64-QFP Texas Instruments MSP430F135IPM U203 IC, CAN transceiver, 3.3V SOIC-8 Texas Instruments SN65HVD232D IC, CAN controller, industrial temp, 3 U204 transmit buffers, 2 receive buffers 18-SOIC Microchip Technology MCP2510-I/S0 U205, U206, U207, IC, optoisolator, dual, transistor o/p, U208, U209...
  • Page 32 R301 Resistor, thick film, 5%, 620ohm, 1W SMD 2512 Panasonic ERJ-1TYJ621U R302, R303 R304, R312, R313, Resistor, thick film, 5%, 1.0kohm, R318, R319, R322 1/8W SMD 0805 Yageo America 9C08052A1001JLHFT Resistor, thick film, 1%, 130ohm, R305, R307 1/8W SMD 0805 Yageo America 9C08052A1300FKHFT R308, R309, R314,...
  • Page 33 J601, J603, J604, J605, J606, J607, J608, J609, J610, Connector, modular, jack, 8- J611 position, vertical, PCB mount Tyco 5556416-1 Connector, D-sub, 25 position, J602 female, vertical, PCB mount Kycon K85-BD-25S-R VI-11...

  • Page 34: Schematics

    Insight System Schematics The following pages contain the schematics for the Insight system. VI-12...
  • Page 35 User Interface Module DC Supply Conditioning L101 ETQ-P6F1R3LFA F101 J101A V1 Input V1 Cond TAC 58V R102 see table R101 2.7k TV 4.87k FM C101 SMBJ30A TV R103 D101 100uF SMBJ48A FM D102 Green SML-LX1206GW L102 ETQ-P6F1R3LFA F102 J101B V2 Input V2 Cond TAC 58V R105...
  • Page 36 User Interface Module Current Monitoring L106 0.01uH +3.3 Vdc C107 C106 0.01uF 0.01uF R117 0.012 J102A V1 Cond V1 Out R118 0.012 U101 INA168 I1 Buff R119 U106A C111 C112 C109 C110 100k OPA2340UA 0.1uF 0.1uF 0.1uF 0.1uF C108 0.1uF R120 0.012 J102B...
  • Page 37 User Interface Module Voltage/Current Monitoring L108 0.01uH +3.3 Vdc C128 C129 0.01uF 0.01uF R129 J102E 0.012 V5 Out V5 Cond R130 0.012 U105 INA168 I5 Buff R131 U108A C133 C134 C131 C132 100k OPA2340UA 0.1uF 0.1uF 0.1uF 0.1uF C130 0.1uF R134 R132 V1 ADC...
  • Page 38 User Interface Module Microcontroller U111 MCP130 L109 0.01uH +3.3 Vdc RESET Reset C141 C142 0.01uF 0.01uF C143 CAN CLK 0.1uF I1 ADC LED1 I2 ADC Buzzer I3 ADC BkLtCtrl I4 ADC I5 ADC Pin15LCD J104 V1 ADC LED A C144 LED K 0.1uF LCD D7...
  • Page 39 User Interface Module J105D +5Vdc +5V-1 J106D CAN and Programmer Interface +5V-2 J105F +3.3Vdc +3.3V-1 J106F +3.3V-2 J105E GND-1 J106E GND-2 J106A L110 RESET RESET-2 0.01uH +3.3Vdc J105H C149 C148 CANH-1 0.01uF 0.01uF J106H CANH-2 U114 J105G SN65HV232 CANL-1 J106G D P1 CANL-2 GND P2...
  • Page 40 User Interface Module Power Supplies U115 LM2576S-5.0 F107 +5 Vdc Feedbk L111 Littlefuse 1812L VgenCond 100uH R154 Vout C150 100uF D114 C151 30BQ060 D115 1000uF +5V LED U116 ULN2003 D113 Green R155 SML-LX1206GW LED1 Buzzer RL101 G6L-1F 5Vdc BkLtCtrl D116 BZ101 R156 S1D-13...
  • Page 41 Coupler Conditioning Module Microcontroller U201 MCP130 +3.3 Vdc RESET Reset C201 C202 C203 0.01uF 0.1uF 0.01uF L202 L201 0.01uH 0.01uH FWD-POW C204 C205 RFL-POW 0.01uF 0.01uF CAN CLK - DIP SWITCH 3,2,1 SET ID - DIP SWITCH 7 ENABLES CAN DVcc P1 MCLK TERMINATION...
  • Page 42 Coupler Conditioning Module CAN and Programmer Interface +5Vdc C210 J201c4 D201 100uF +5V-1 J201d4 +5V-2 J201c6 +3.3Vdc +3.3V-1 J201d6 C211 +3.3V-2 D202 100uF J201c2 GND-1 J201d2 GND-2 L204 0.01uH J201c1 +3.3Vdc RESET RESET-1 C212 C213 J201c8 0.01uF 0.01uF CANH-1 J201d8 CANH-2 U203 J201c7...
  • Page 43 Coupler Conditioning Module +3.3 Vdc Remote Access Port U205 MOCD211M +5 Vdc CAR OFF U206 MOCD211M CAR ON OVERDRV VSWR R203 R204 R205 R206 J203 J204 U207 MOCD211M CAR DOWN CAR UP U208 MOCD211M TEMP R207 R208 R209 R210 U209 MOCD211M RFL-OUT FWD-OUT...
  • Page 44 Coupler Conditioning Module RF Power Output C216 L206 C217 0.01uF 0.01uF 0.01uH +5 Vdc U211A OPA2340UA R214 SIMO FWD-OUT U212 TLV5625 DAC CS D206A RFL-OUT U211B OPA2340UA D206B U213 LM4040-2.5 R215 R216 Coupler Input L207 L208 +5Vdc +3.3 Vdc 0.01uH 0.01uH C218 C219...
  • Page 45 U301 L301 F301 J301 R301 PSU In +5 Vdc R302 R304 D301 C301 R303 C302 C303 J301 Ground D302 CTL 1dB U302 Alpha 110-85 CTL 2dB RF 2 CTL 4dB CTL 8dB CTL 16dB C304 C305 J303 +5 Vdc RF OUT C306 J304 4 Ext 5Vdc...
  • Page 46 U306 DBTC-20-4 RF 1 RF 2 DIR. COUPLER R324 +5 Vdc U307 C310 C311 AD8362 C307 Shutdown R323 C320 VR301 C308 C309 DIP16 U308 C312 J302 SAGE WIRE -HCT2 RF IN RF 1 VR303 R305 R307 HYBRID COUPLE C314 C313 R325 R326 D309...
  • Page 47 Temperature Sensor DRV DIS LM70 TMP SO TMP SCK TMP GND TMP VCC TMP CS TMP VCC N. Hendrickson, A. Sivacoe Temperature Sensor Board 1.02 Insight Control System Date: May 8, 2005 Page: 1 of 1...
  • Page 48 J601 PSUflag F601 RFL samp TEMPflag F602 J602 FWD samp VSWRflag ODRVflag ground J603 CAR on CAR off CAR up F603 +5 Vdc CAR down F604 +3.3 Vdc Soft RES RESET J604 J605 IN 1 OUT 1 IN 2 OUT 2 IN 3 OUT 3 IN 4...

  • Page 49: 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.

  • Page 50: 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 51: 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 52: 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 53: 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 54: 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 55: 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 56: Location And Function Of Controls And Connectors

    Location and Function of Controls and Connectors (TAV-25 Power Amplifier) The following illustration depicts the location of the connectors when installing the 25-watt power amplifier (TAV-25). Technalogix Ltd VIII-7...
  • Page 57 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 58: Initial Hook Up

    9. 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). 10. Connect the transmitting antenna cable to the RF OUT N -type connector on the power amplifier enclosure RF output. Technalogix Ltd VIII-9...

  • Page 59: Section Ix - Operating Procedure

    25 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 TAV-25 power amplifier has been factory aligned for channel frequency (per system specification), signal levels and optimum performance.
  • Page 60 10. The TAV-25 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% on the filter enclosure - depending on signal content. The system is set up for 25 watts peak visual power using the sync and blanking signal and should read 100 % FWD Power on the LCD under this condition only.

  • Page 61: 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 62: 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 63 Thank you for choosing Technalogix Ltd.

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