TAVD-500 POWER AMPLIFIER
You’ve already unpacked it, haven’t you? You’ve unpacked it and plugged it in and turned it on and fiddled with the knobs. 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.
Table of Contents SECTION I- SAFEGUARDS ................................................................................................................. I-1 SAFETY AND FIRST AID .................................................................................................................... I-2 OPERATING SAFEGUARDS ............................................................................................................... I-3 SECTION II - WARRANTY .....................................................
INITIAL HOOK UP……………………………………………………………………………………… VIII-13 SECTION IX - OPERATING PROCEDURE ...........................................................................................IX-1 SECTION X - MAINTENANCE AND TROUBLESHOOTING .......................................................................X-1 TROUBLESHOOTING ........................................................................................................................
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. DOCUMENTATION - Read, retain and follow instructions before operating the equipment.
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. • At all times, avoid placing any part of the body in series between ground and circuit points, whether power is on or off.
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.
Section II - Warranty Our legalese is straightforward. It is simply designed to give you peace of mind and helps you resist the temptation to have your electronics friend try to repair your Technalogix product. Technalogix Ltd. products have been completely tested and found to meet specifications and be in proper operating condition. They are warranted to be free from defects in materials and workmanship for a period of one year from the date of shipment.
To claim your rights under this warranty: • 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. Please look under our web site (www.technalogix.ca) for the RMA form (Service) and fill it out. Either fax it to us or email to us.
Terms & Conditions of Sale Sales by Technalogix Ltd (“Seller”) are made only on the terms which are contained in this Terms and Conditions of Sale Policy. Seller hereby gives notice of its objection to any different or additional terms and conditions. All sales are expressly conditional upon Buyers’ assent to the terms and conditions set forth below. These terms and conditions may be modified or supplemented only by a written document sighed by the authorized representative of Seller.
Terms of Payment Seller will provide credit terms to Buyer at its discretion. Such terms are subject to change at all times. If credit is provided, Seller will invoice Buyer on the date the product is ordered. Such invoices will be due and payable net thirty (30) days from date of invoice, subject to credit approval. If credit is not established or maintained, terms shall be net cash on or prior to the Delivery Date.
Orders for custom product are subject to a cancellation fee of up to 100% of the order, depending on the stage of completion of the order at the date the cancellation or revision is accepted. Returns The return of Products without a written authorization by Seller will not be accepted. Returns are accepted only with a valid Return Material Authorization (RMA) number for items to be returned. To receive authorization for Product return, please call customer service.
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 • AC circuit breaker on back panel to eliminate replacement of fuses • All aluminium enclosure maintains power amplifier’s light weight • Simple design using com
Principle of Operation The TAVD-500 power amplifier supplies a 500-watt (rms) 8VSB television signal 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.
Modulator or Processor TAVD-500 AMPLIFIER FILTER RF Out External power supply TAVD-500 BLOCK DIAGRAM Rev ID Date: May 21, 2009 Page: 1 of 1
TAVD-500 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 gets preamplified through the two driver pallets before the signal gets split into (4) signals for final amplification.
VHFTV-400H FINAL AMPLIFIER PALLET VHFTV-25 Pallet Driver 4 WAY SPLIITER 4 WAY COMBINER A=-0.5dB typical ATTENUATION Directional C RF INPUT RF OUT To Wattmeter and Antenna A=-0.
Specifications Electrical specifications that are specific to the unit are included with the shipment in addition to being kept on file at Technalogix. Physical Characteristics Power Requirements Power Supply 220 VAC, 11 AAC 0 - 50°C TAVD-500 Power Amplifier W-19" flange (17” encl.), D-25-¼", H-101/2” (6U) W-19" flange (17” encl.), D-25-¼", H-8-¾” (5U) W-19" flange (17” encl.
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 36dB and the VHFTV-25-H has a typical gain of 34dB. These pallets draw no more than 3.5Adc total drain current (the exact bias and drain currents of your system are found in the spec sheet supplied with each manual).
Technalogix Ltd. 25 Watt High Band VHF Pallet B PA25-VHF-H S.
Technalogix Ltd. 200 Watt High Band VHF Pallet P200-VHF-H R.S.
Technalogix Ltd. 400 Watt High Band VHF Pallet P400-VHF-H R.S.
Filter The passive bandpass filter rejects spurious and harmonic output products and passes the VHF channel RF output. The cavity resonator uses aperture coupling and is a linear resonator design. Typical insertion loss is 0.6 dB to 1.0 dB depending on channel frequency. Average roll off is –33 dBc at a point 4.5 MHz below the peak visual carrier frequency and –30 dBc 9.0 MHz above the peak visual carrier frequency. The filter is DC grounded on both the input and output for additional lightning protection.
Section V – Power Supply Switching AC-DC power supplies are used to power the amplifier pallets, the control circuits, and all of the fans. The power supply is set at 30.0 Vdc nominally. All fans run off this same supply, though they pass through a series dropping resistor to lower the supply voltage, as the fans are 24Vdc. The (2) power supplies found in the power supply enclosure are Mean Well RSP-1500-27. The switching power supplies are fully protected against short circuit and output overload.
² 1500W with PFC and Parallel Function CASE: 943 ƤUniversal AC input / Full range ƤPF>0.98@115VAC; >0.95@230VAC ƤUsing ZVS technology to reduce power dissipation ƤHigh power density 8.3W/in 3 ƤBuilt-in 12V / 0.1A auxiliary output ƤAlarm signal output ƤDC output voltage adjustment 70~100% by external resistor ƤActive current sharing up to 6000W (3+1) ƤBuilt-in remote sense function ƤBuilt-in remote ON/OFF control ƤProtections: Short circuit / Overload Over voltage / Over temp.
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. Five modules comprise the Insight control system. These modules work together to provide all the functions of the control system.
The hardware of the User Interface module is based around a microcontroller (U112). This microcontroller interfaces directly with the LCD and the membrane switch to provide output and receive input from the user. The microcontroller also communicates with the Coupler Conditioning board over a Controller Area Network (CAN) bus. This communication is facilitated by two ICs, U113 and U114, and passes through a CAT5 cable attached to connector J106.
Aside from taking readings from the coupler, the microcontroller on the coupler conditioning module also interfaces with the RF Conditioning module (through J201) and the Temperature Sensor (through J202). The microcontroller interfaces with the system CAN bus using U203 and U204. Through the CAN bus, the Coupler Conditioning board is able to communicate with the User Interface module, and any other amplifier enclosures that are in the system.
TxNET module The TxNET module is simply a passive board that acts as an interface between the wiring on the inside of the amplifier enclosure and connections on the outside of the enclosure. There is a high power version for systems that have more than one amplifier enclosure and a low power version, which does not have external enclosures aside from the modulator. The DB-25 connector for the remote port (J602) is attached to the TxNET module.
Remote Port The remote port allows external control of the transmission system via the DB25. The Power Amplifier enclosure does not include all the pins in the remote port like the Combiner/Filter enclosure.
Fault Shutdowns On the LCD (Liquid Crystal Display) the following messages may appear: The Amplifier overdrive shutdown is set to 115%. If the Amplifier is being overdriven (the RF output level is too high) the control system will automatically attenuate the RF input signal to the PA. It will continue attenuating this signal until the RF output is below 115% total power. If Reflected Power has been detected at the output of the transmitter, the unit will shut down for 4 seconds.
The control system monitors the temperature of a specific location of the heat sync. If this temperature exceeds a threshold the control system will turn the RF output level down until this temperature level is reached. The RF output level will automatically be brought back when it is safe to do so.
Monitor and Control System (Insight) Bills of Materials Technalogix Ltd VI-8 TAVD-500 Transmitter
Bill of Materials Circuit: User Interface Module (TV) Revision: 1.03 Modified: 08/03/06 Item Page 1 Designations Qty Bin # Description Package 1 U112 1 ICT 32001 IC MICROCONTROLLER 256 BYTE RAM 2 C106, C107, C117, C118, C128, C129, C141, C142, C148, C149, C163 11 CAP 14902 CAPACITOR 0.01 uF 50V 10% SMD 0805 3 C108-116, C119-127, C130-140, C143145, C161 33 CAP 17202 CAPACITOR 0.
Bill of Materials - ASY129A Circuit: Coupler Conditioning (D-Attn) Revision: 1.10 Modified: 12/1/08 Item Designations 17 C201, C202, C203, C208, C209, C210, C212, C214-C223 C204, C211, C213 C205 C206, C207 L201, L202, L203, L204, L205, L206, L207, L208 D201 D202, D203, D204 D205 D206 D207, D208, D209, D210 D211 D212 R201, R203, R205, R206, R207, R209, R213 R210 R212, R216, R218, R219 R215, R217 RN201, RN203, RN205 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Qty Package CAP 14902 Capacitor, ceramic, 0.
Bill of Materials - ASY129B Circuit: Coupler Conditioning (V-Attn) Revision: 1.
Bill Of Materials - ASY 0009B Circuit: RF Conditioning (DC Filter, VHF) Revision: 1.12 Modified: 1-Dec-08 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Designations C301 C302, C305 C303 D302 D303, D304, D305, D306, D307 L301 R301 R304, R309, R310, R315, R316, R319 R305, R306, R311, R312, R317 R307, R308, R313, R314, R318 U301 U302, U303, U304 S301 J303 J301, J302 J304 C304 PCB Qty 1 2 1 1 Bin # CAP 15702 CAP 14902 CAP 17202 SEM 09005 Capacitor, ceramic, 0.022uF, 50Vdc, +/-10% Capacitor, ceramic, 0.
Bill Of Materials - ASY0009A Circuit: RF Conditioning (no DC filter) Revision: 1.12 Modified: 1-Dec-08 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Designations C301 C302, C305 C303 D302 D303, D304, D305, D306, D307 R301 R304, R309, R310, R315, R316, R319 R305, R306, R311, R312, R317 R307, R308, R313, R314, R318 U301 U302, U303, U304 J301, J302 J304 PCB Qty 1 2 1 1 Bin # CAP 15702 CAP 14902 CAP 17202 SEM 09005 Capacitor, ceramic, 0.022uF, 50Vdc, +/-10% Capacitor, ceramic, 0.
Bill Of Materials - ASY 0009C Circuit: RF Conditioning (DC Filter, UHF) Revision: 1.12 Modified: 1-Dec-08 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Designations C301 C302, C305 C303 D302 D303, D304, D305, D306, D307 L301 R301 R304, R309, R310, R315, R316, R319 R305, R306, R311, R312, R317 R307, R308, R313, R314, R318 U301 U302, U303, U304 S301 J303 J301, J302 J304 C304 PCB Qty 1 2 1 1 Bin # CAP 15702 CAP 14902 CAP 17202 SEM 09005 Capacitor, ceramic, 0.022uF, 50Vdc, +/-10% Capacitor, ceramic, 0.
Bill of Materials - ASY 180B Circuit: Temperature Sensor (DC Filter VHF) Revision: 1.10 Modified: 11/13/08 Item Designations Qty Bin # 1 3 4 5 6 7 8 9 10 U701 C701 C704 C705 L701 J701 J702 S701 1 1 1 1 1 1 1 1 1 ICT 52000 TRM 0006 CAP 17202 CAP 08402 IND 0832 CON 31525 CON 45021 SWT 0016 PCB 180 Description IC, temperature sensor, SPI TRIMMER CAPACITOR, 9-90pF CAPACITOR 0.1uF, 50V, 10% CAPACITOR 100pF, 50V, 10% INDUCTOR, 0.1uH, 10%, 175mA, 0.80ohm CONNECTOR, header, 0.
Bill of Materials - ASY 180A Circuit: Temperature Sensor (no DC filter) Revision: 1.10 Modified: 11/13/08 Item Designations Qty Bin # 1 2 3 4 6 7 U701 C702, C704 C703 C705 J702 1 2 1 1 1 1 ICT 52000 CAP 17202 CAP 11502 CAP 08402 CON 45021 PCB 180 Description IC, temperture sensor, SPI CAPACITOR 0.1uF, 50V, 10% CAPACITOR 0.001uF (1000pF), 50V, 10% CAPACITOR 100pF, 50V, 5% CONNECTOR, modular, jack, 8-8 R/A, shielded PRINTED CIRCUIT BOARD, FR4, 0.
Bill of Materials - ASY180C Circuit: Temperature Sensor (w/ DC Filter UHF) Revision: 1.10 Modified: 11/13/08 Item Designations Qty Bin # 1 2 3 4 5 6 7 8 9 U701 C701 C704 C705 L701 J701 J702 S701 1 1 1 1 1 1 1 1 1 ICT 52000 TRM 0006 CAP 17202 CAP 08402 IND 0831 CON 31525 CON 45021 SWT 0016 PCB 180 Description IC, temperature sensor, SPI TRIMMER CAPACITOR, 9-90pF CAPACITOR 0.1uF, 50V, 10% CAPACITOR 100pF, 50V, 10% INDUCTOR, 0.01uH, 10%, 540mA, 180mohm CONNECTOR, header, 0.
Bill of Materials: ASY 206 Circuit: TxNET LP Revision: 1.10 Modified:12/1/08 Item Designations Qty Bin # 1 F601, F602, F603, F604 4 FUS 0801 2 J601, J603 2 CON 45020 Connector, 8-8 mod jack, shielded 3 J602 1 CON 21000 Connector, D-sub, 25 position, female, vertical, PCB mount 4 PCB 1 PCB 206 Description Fuse, resettable, Ihold=0.14A, Itrip=0.34A, Vmax=60V PCB, FR4, 0.
Insight System Schematics The following pages contain the schematics for the Insight system.
User Interface Module DC Supply Conditioning Vin J101A L101 ETQ-P6F1R3LFA F101 V1 Input V1 Cond + TAC 58V see table SMBJ30A TV SMBJ48A FM J101B D101 C101 100uF 63V R101 2.7k TV 4.87k FM R102 20 R103 20 D102 Green SML-LX1206GW L102 ETQ-P6F1R3LFA F102 V2 Input V2 Cond + TAC 58V see table SMBJ30A TV SMBJ48A FM J101C D103 C102 100uF 63V R104 2.7k TV 4.
User Interface Module Current Monitoring L106 0.01uH +3.3 Vdc C107 0.01uF C106 0.01uF R117 0.012 V1 Cond J102A V1 Out R118 0.012 + U101 INA168 I1 Buff R119 100k C108 0.1uF U106A OPA2340UA C109 0.1uF C110 0.1uF C111 0.1uF C112 0.1uF R120 0.012 V2 Cond J102B V2 Out R121 0.012 + U102 INA168 I2 Buff R122 100k C113 0.1uF U106B OPA2340UA C114 0.1uF C115 0.1uF C116 0.1uF L107 0.01uH +3.3 Vdc C118 0.01uF C117 0.01uF R123 0.012 V3 Cond J102C R124 0.
User Interface Module Voltage/Current Monitoring L108 0.01uH R129 0.012 V5 Cond J102E V5 Out R130 0.012 + U105 INA168 I5 Buff R131 100k U108A OPA2340UA C130 0.1uF C131 0.1uF + Vin +3.3 Vdc C128 0.01uF C129 0.01uF R133 3.3k C134 0.1uF R134 R132 37.4k - TV 68.1k - FM C132 0.1uF C133 0.1uF V1 ADC 1k U108B OPA2340UA C135 0.1uF R135 1k I1 Buff I1 ADC C136 0.1uF R136 1k I2 Buff I2 ADC C137 0.1uF R137 1k I3 Buff I3 ADC C138 0.1uF R138 1k I4 Buff I4 ADC C139 0.
User Interface Module U111 MCP130-450 L109 0.01uH +3.3 Vdc C141 0.01uF C142 0.01uF Vcc Reset RESET GND Microcontroller TCK TMS TDI TDO C143 0.1uF CAN CLK I1 ADC LED1 I2 ADC Buzzer I3 ADC BkLtCtrl I4 ADC I5 ADC Pin15LCD J104 V1 ADC LED A C144 0.
User Interface Module J105D +5Vdc J106D CAN and Programmer Interface +5V-1 +5V-2 J105F +3.3Vdc +3.3V-1 J106F +3.3V-2 J105E J106E L110 0.01uH J106A RESET GND-1 GND-2 RESET-2 +3.3Vdc J105H C149 0.01uF C148 0.01uF J106H U113 CAN CLK P1 P2 P3 P4 P5 P6 P7 P8 P9 CANH-2 J105G U114 P1 P2 P3 P4 CANH-1 CANL-1 J106G P8 P7 P6 P5 CANL-2 SN65HV232 CANterm1 P18 P17 P16 P15 P14 P13 P12 P11 P10 R152 100 CANterm2 MCP2510 RESET SCK SIMO SOMI CAN CS R153 100k TDO J107 TDI +3.
User Interface Module Power Supplies U115 LM2576S-5.0 F107 +5 Vdc L111 100uH Littlefuse 1812L R154 tbd C150 100uF D114 30BQ060 P1 P2 P3 P4 P5 P6 P7 P8 Buzzer BkLtCtrl R156 10k C151 1000uF D113 Green SML-LX1206GW U116 LED1 + + VgenCond P16 P15 P14 P13 P12 P11 P10 P9 D116 S1D-13 D115 +5V LED R155 1k RL101 G6L-1F 5Vdc BZ101 R157 4.7 ULN2003 Pin15LCD +5 Vdc U117 LM1117MP-3.3 IN C152 10uF 10V tantalum F108 +3.3 Vdc OUT Littlefuse 1812L C153 100uF COM R158 430 D117 +3.
Coupler Conditioning Module Microcontroller +3.3 Vdc Vcc Reset RESET GND U201 MCP130-450 TCK TMS TDI TDO C201 0.01uF L202 0.01uH L201 0.01uH FWD-POW C202 0.01uF RFL-POW C203 0.01uF DRVR DIS LED 1 CAN CLK C204 0.1uF C205 10uF + C206 33pF Y201 6.
Coupler Conditioning Module CAN and Programmer Interface +5Vdc C210 0.01uF C211 0.1uF D201 +3.3Vdc C212 0.01uF L204 0.01uH C213 0.1uF D202 RESET R209 0 +3.3Vdc C214 0.01uF C215 0.01uF U203 D P1 GND P2 Vcc P3 R P4 U204 CAN CLK P1 P2 P3 P4 P5 P6 P7 P8 P9 P8 P7 CANH P6 CANL P5 J203 4 +5V-1 J204 4 +5V-2 J203 6 +3.3V-1 J204 6 +3.
Coupler Conditioning Module Coupler Input +5Vdc +3.3 Vdc J206 FWD GND J206 FWD+3.3 J206 FWD+5V J206 FWD In 4 3 2 L205 1 FWD-POW 0.01uH C216 0.01uF D203 J207 RFL GND J207 RFL+3.3 J207 RFL +5V J207 RFL In C217 0.01uF 4 3 2 L206 1 RFL-POW 0.01uH C218 0.01uF D204 C219 0.01uF 10 10 10 10 10 +3.3 Vdc 10 Interface +5 Vdc DRVR DIS U205 D205 4 3 2 1 6 7 RN202 RN202 RN202 RN202 RN202 RN202 1k 1k 1k 1k 1k 1k R211 1k D206 D207 D208 D209 D210 R212 1k L207 0.
RF Power Output C222 0.01uF L208 0.01uH R215 2.15k C223 0.01uF +5 Vdc + R216 1k SIMO FWD-OUT U206B LM358 U207 1 3 SCK 10k VR201 DAC CS P1 P2 P3 P4 D212A P8 P7 P6 P5 TLV5625 U208 LM4040-2.5 R217 2.15k 10k VR202 + RFL-OUT 1 2 U206A LM358 D212B +3.
RF Conditioning Digital Attenuation J301 RF 2 R301 CTL 1dB U301 CTL 2dB R302 J1 GND GND GND GND GND GND GND GND J2 R303 J302 RF OUT N/C CTL1 CTL2 CTL4 CTL8 CTL16 Vss C2 C1 Vcc CTL 4dB CTL 8dB CTL 16dB C301 C302 C303 Opto-Isolation J303 S301 Ext 5Vdc C304 L301 J304 4 R304 D301 C305 D302 1dB in 2dB in U302 J304 P1 P2 P3 P4 1 2 P8 P7 P6 P5 R305 R306 CTL 1dB CTL 2dB R307 R308 D303 D304 R309 R310 U303 8dB in 4dB in J304 P1 P2 P3 P4 5 3 P8 P7 P6 P5 R311 R312 CTL 8dB CTL 4dB R
C701 L701 J701 S701 +3.3Vdc TMP Vcc J702 2 TMP CS J702 8 C702 U701 TMP SO J702 3 TMP SCK J702 4 TMP GND J702 1 Disable P1 P2 P3 P4 P8 P7 P6 P5 LM70CIMM J702 J703 7 From CTRL Disable To amp pallet C704 1 C703 C705 A. Sivacoe Temperature Sensor Board Rev ID 1.
PSUflag J601 1 RFL samp 2 TEMPflag 3 FWD samp 4 VSWRflag 5 ODRVflag 7 ground 8 CAR on J603 F601 F602 J602 13 12 11 10 9 8 7 6 5 4 3 2 1 1 CAR off 2 CAR up 3 +5 Vdc 4 CAR down 5 +3.3 Vdc 6 Soft RES 7 RESET 8 25 24 23 22 21 20 19 18 17 16 15 14 F603 F604 1 TxNET Rev ID 1.
PSUflag J601 1 RFL samp 2 TEMPflag 3 FWD samp 4 VSWRflag 5 ODRVflag 7 ground 8 CAR on J603 2 CAR up 3 +5 Vdc 4 CAR down 5 +3.
Section VII – Mechanical Section The heat sinks allow the amplifiers to operate at a cooler temperature and prevent overheating, which helps the longevity of the entire system. Each heat sink has hollow fins, which help dissipate the heat from the amplifiers faster than a conventional serrated or corrugated fin.
Section VIII - Installation This section contains installation recommendations, unpacking, inspection, and installation instructions for the power amplifier. We are sure that you are chomping at the bit to install your new system, so we recommend that you read the following sections very carefully. Building Recommendations The quality of the building is of great importance if you are to expect long life and continued performance from the power amplifier.
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. Please ensure that the intake and exhaust areas are on the same side of the building to avoid pressure differentials during windy conditions.
Electrical Service Recommendations Technalogix recommends that a qualified, licensed local electrician be consulted for the required electrical service. We suggest local electricians because: • The personnel knows the local codes • The personnel can be on site readily • 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.
Antenna and Tower Recommendations Your preliminary engineering workgroup should establish your antenna and tower requirements, both for receiving and transmitting antennas. Construction of sturdy, high quality antenna/tower systems will pay off in terms of coverage of your service area, the overall quality and saleability of your radiated signal, and reduced maintenance expenses. Technalogix provides complete turnkey antenna systems if needed.
Shelter Security The FCC requires that the transmitter or translator be secure from entry or control by unauthorized persons, and that any hazardous voltages or other dangers (including most tower bases) be protected by locks or fences as necessary to protect personnel and prevent unauthorized tampering or operation. Security of the building further implies that it be secure from wildlife. Use sturdy construction materials, including sheet metal if necessary.
Unpacking and Inspection Check the outside of the container. Carefully open the container and remove the power amplifier. Retain all packing material that can be reassembled in the event that the equipment must be returned to the factory. Exercise care in handling equipment during inspection to prevent damage due to rough or careless handling. Visually inspect the enclosure of the power amplifier for damage that may have occurred during shipment.
Location and Function of Controls and Connectors (TAVD-500 Power Amplifier) The following illustration depicts the location of the connectors when installing the 500-watt power amplifier. Technalogix Ltd.
POWER - Tactile button to turn carriers on and off. NAVIGATE - Tactile button to move between menu items, or to refresh the screen after it has timed out. SELECT- Tactile button to select menu item, or to refresh the screen after it has timed out. RESET - Tactile button to reset microcontroller in control board. Also clears existing faults. The amplifier will come back on with the soft start feature. RF IN – RF input from modulator or processor. BNC connector, 50 ohm.
Location and Function of Controls and Connectors (Filter Enclosure) The following illustration depicts the location of the connectors when installing the filter enclosure. Technalogix Ltd.
RF IN - RF inputs (500-watts each) from the power amplifier. N female connector, 50 ohm. RF OUT – 500-watt (rms) RF output. Connects to inline wattmeter (not supplied) and antenna. 7/16”DIN female connector, 50 ohm. Technalogix Ltd.
Initial Hook Up 1. Ensure that the antenna has been swept and has a return loss of greater than 20dB (VSWR = 1.2:1). This should be done before connecting the antenna cable to the transmitter output. 2. Check that your video source is present. 3. Place the transmitter/translator in its permanent location near a receptacle supplying required AC voltage. DO NOT APPLY AC POWER AND TURN ON POWER TO THE TRANSMITTER / TRANSLATOR AT THIS TIME SINCE THE RF OUTPUT MUST BE PROPERLY LOADED BEFORE OPERATION. 4.
Section IX - Operating Procedure Assuming the previous installation instructions have been completed and cautions noted, and the TAVD-500 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 TAVD-500 power amplifier has been factory aligned for channel frequency (per system specification), signal levels and optimum performance.
10. The TAVD-500 LCDs show 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 400 to 500 Watts on the PA enclosure. The output power level can be adjusted using the modulator or processor’s RF output level adjust. Keep in mind that the system will shut down should the forward RF output power level be exceeded. 11. Ideally, the RFL Power should read zero.
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. Turn the system off and unplug all of the AC inlet cords. The filter can be lifted off the fan and cleaned using an air compressor at low pressure.
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? • Is the AC power ‘ON’ to the site and the equipment? (Check fuses and circuit breakers if necessary.
Symptom High reflected power Technalogix Ltd Possible Fault Correction Incorrect load Ensure amplifier connected to transmission line Ensure correct antenna impedance (50 ohms) Check antenna tuning and VSWR.
Thank you for choosing Technalogix Ltd.
