Technalogix TAV-25 Скачать руководство пользователя страница 12 | Manualshive

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III-3

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. Finally, the amplified signal passes through a dual directional coupler for
monitoring purposes. After the directional coupler, the signal exits the power amplifier enclosure
before heading out to an antenna for broadcast.

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Содержание TAV-25

Страница 1: ...TAV 25 POWER AMPLIFIER NEW ADVENTURES IN BROADCASTING ...

Страница 2: ...understand that a capable and confident user will get the most out of our product and we have made every attempt to educate readers of all technical levels If there is something that is not clear or you require further information please do not hesitate to contact us and we ll be glad to help out Technalogix Ltd 4 8021 Edgar Industrial Place Red Deer Alberta Canada T4P 3R3 Phone 403 347 5400 Fax 4...

Страница 3: ... IV RF COMPONENTS IV 1 AMPLIFIER PALLETS IV 1 DIRECTIONAL COUPLER IV 4 FILTER IV 4 SECTION V POWER SUPPLY SECTION V 1 SECTION VI MONITOR AND CONTROL SYSTEM VI 1 CONTROL BOARD OVERVIEW INSIGHT VI 1 USER INTERFACE MODULE VI 1 COUPLER CONDITIONING MODULE VI 2 RF CONDITIONING MODULE VI 3 TEMPERATURE SENSOR MODULE VI 4 TXNET MODULE VI 5 REMOTE PORT VI 6 FAULT SHUTDOWN VI 7 BILL OF MATERIALS VI 8 SCHEMA...

Страница 4: ...RECOMMENDATIONS VIII 3 ANTENNA AND TOWER RECOMMENDATIONS VIII 4 SHELTER SECURITY VIII 5 UNPACKING AND INSPECTION VIII 6 LOCATION AND FUNCTION OF CONTROLS AND CONNECTORS TXV 25 POWER AMPLIFIERS VIII 7 INITIAL HOOK UP VIII 11 SECTION IX OPERATING PROCEDURE IX 1 SECTION X MAINTENANCE AND TROUBLESHOOTING X 1 TROUBLESHOOTING X 2 ...

Страница 5: ...UMENTATION Read retain and follow instructions before operating the equipment There is a lot of useful information in the manual and besides we spent a lot of time writing it ENVIRONMENT To reduce the risk of fire or electric shock do not expose this equipment to rain moisture or rye and sodas at the company Christmas party Refer all servicing to qualified service personnel SERVICING Do not attemp...

Страница 6: ...h and frequently places the victim in a state of shock accompanied by respiratory paralysis Respiratory paralysis can cause death by suffocation within seconds It is imperative that the approved methods of artificial respiration are initiated immediately and continue until the victim s breathing is normal A muscular spasm of unconsciousness may render the victim unable to break free of the electri...

Страница 7: ...f the RF transistors used in the individual amplifier pallets are fabricated with LDMOS Laterally Diffused Metal Oxide Semiconductor technology Nice and linear yes but they do not like to make any RF power when their supply voltages are not within a specific range When you first turn your power amplifier on or off the DC power supply s output voltage may take a while to stable out to a safe operat...

Страница 8: ...n 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 Technalogix Ltd warranty does not include misuse neglect or accident incorrect wiring and or improper installation unauthorized repairs modifications or use in violation of instructions issued by...

Страница 9: ...alogix ca for the RMA form Service and fill it out Either fax it to us or email to us Package equipment carefully for prepaid shipment to Technalogix Include a written description of the problem experienced a copy of the original invoice establishing warranty status and the RMA Technalogix reserves the right to make revisions in current production of the equipment and assumes no obligation to inco...

Страница 10: ...ng 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 RF EMI filtering on AC entry plug All aluminium enclosure maintains power amplifier s light weight Simple design using commonly available parts ensures reliable operation Predominate and third order intermodulation distortion exceeds I...

Страница 11: ...e channel requested and is not field tuneable The TAV 25 power amplifier is a modular solid state 25 watt broadcast amplifier utilizing readily available RF components wherever possible thus enhancing the serviceability of the equipment The TAV 25 is comprised of a VHFTV 25 L pallet for low band VHF frequencies or VHFTV 25 H pallet for high band VHF frequencies The TAV 25 features ultra linear amp...

Страница 12: ... 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 Finally the amplified signal passes through a dual directional coupler for monitoring purposes After the directional coupler the signal exits the power amplifier enclosure before heading out to a...

Страница 13: ... typ TO WATTMETER AND ANTENNA A 40dB typ low band VHF A 34dB typ high band VHF RF OUT ATTENUATOR UHFTV 25 RF INPUT V V COUPLER DIRECTIONAL V CIRCULATOR FILTER TERMINATION 50 OHM TAV 25 Block Diagram Date May 23 2005 Page 1 of 1 Rev ID ...

Страница 14: ...hannel Minimum Input Level 0 dBmV Rated Visual Output Power 25 Watts Rated Aural Output Power 10 of peak visual power IF Output Level 35 dBmV nominal Input Impedance 75 Ohms Output Impedance 50 Ohms Harmonics 60 dB below rated power Predominant Intermodulation Distortion dBc decibels below visual carrier 920 kHz 53 dBc 920 kHz 53 dBc 2 66 MHz 53 dBc 2 66 MHz 53 dBc 5 42 MHz 53 dBc 7 16 MHz 53 dBc ...

Страница 15: ...ion 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 Power Requirements TAV 25 Power Amplifier 115 VAC 4 AAC or230 VAC 2 AAC Operating Temperature 0 50 C Dimensions TAV 25 Power Amplifier W 19 flange 17 encl D 21 25 H 5 25 3U ...

Страница 16: ...ents of your system are found in the spec sheet supplied with each manual The quiescent and drain currents can be measured on the VHFTV 25 pallet by measuring the voltage drop across the current sense resistor found directly at the DC power supply lead input to the pallet This resistance is 0 01 ohms providing a 10mV per ampere ratio Each of the amplifier pallets is connectorized All amplifier pal...

Страница 17: ...TECHNALOGIX LTD 25 W UHF HI BAND DRIVER P25 UHF R S MCDONALD 14 SEPTEMBER 2000 A A 1 1 ...

Страница 18: ...A A 1 1 TECHNALOGIX LTD 25 W UHF LO BAND DRIVER P25 UHF L R S MCDONALD 14 SEPTEMBER 2000 23 ...

Страница 19: ...ring 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 couplers installed in the power amplifier and filter enclosures have peak detection circuits on the forward RF power side of the coupler and average detection circuits on the reflected RF power side of the coupler This ...

Страница 20: ...d against short circuit and output overload Short circuit protection is a cycling type power limit The internal AC fuse is designed to blow only on a catastrophic failure in the unit the fuse does not blow on overload or short circuit The thermal shutdown automatically recovers when the power supply chassis cools down AC is fed into the enclosure via a filtered EMI AC entry It is then current limi...

Страница 21: ...0Hz 2G 10min 1cycle 60min each along X Y Z axes 179 3K hrs min MIL HDBK 217F 25 190 93 65mm L W H 1 2Kg 12pcs 15 3Kg 0 78CUFT 1 All parameters NOT specially mentioned are measured at 230VAC input rated load and 25 of ambient temperature 2 Ripple noise are measured at 20MHz of bandwidth by using a 12 twisted pair wire terminated with a 0 1uf 47uf parallel capacitor 3 Tolerance includes set up toler...

Страница 22: ...TAGE V 60Hz 80 160 85 170 90 95 180 100 190 105 200 110 210 115 220 120 230 125 240 250 130 260 28 32 24 20 16 12 8 LOAD Ta 25 OUTPUT VOLTAGE V OUTPUT RIPPLE mVp p Output Derating 25 50 150 100 200 250 300 10 0 10 20 30 40 50 60 20 40 60 80 100 HORIZONTAL 41 5 43 5 9 5 Air flow direction 133 49 5 159 5 171 25 26 37 5 8 2 1 4 3 6 5 7 190 65 93 44 50 7 5 4 SO M3 L 6 3 M4 L 6 139 5 20 240W Single Out...

Страница 23: ...he heat sink of the transmitter The time since the transmitter was last shut down 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 ...

Страница 24: ...is filtered by CLC networks and buffered and amplified by the op amp U214 The level of the forward signal can be adjusted by VR201 and the reflected signal by VR202 These two potentiometers can be used to fine tune the power readings of the transmitter if they go out of calibration The analog signals are converted to digital by an analog to digital converter integrated into the microcontroller U20...

Страница 25: ...board mounted to the main heatsink of the amplifier The main purpose of the temperature sensor module is to take temperature readings of the heatsink The temperature sensor IC is U1 which after it has taken a reading relays the digital information to the coupler conditioning module through J1 Also passing through J1 is a driver disable signal coming from the coupler conditioning module The tempera...

Страница 26: ...Carrier on 2 6 Increase carrier level level must have been decreased 2 7 Decrease carrier level 1dB increments 2 8 Soft reset 2 9 Reset 2 10 Power supply fault flag 3 11 High temperature flag 3 12 High VSWR flag 3 13 Amplifier overdriven flag 3 14 5Vdc 15 3 3Vdc 16 Ground 17 Ground 18 N C 19 N C 20 N C 21 N C 22 N C 23 N C 24 N C 25 N C Notes 1 Analog output with voltage ranging from 0 to 5Vdc 2 T...

Страница 27: ...ion at its input to bring the output power to a safe level This message indicates that excessive reflected power has been detected at the output of the transmitter Periodically the amplifier will cycle on and re check for reflected power If high reflected power continues the transmitter will eventually shut down completely This message indicates that the transmitter is experiencing unsafe internal...

Страница 28: ... 0805 Yageo 9C08052A2493FKHFT R140 R141 R144 R145 R146 R147 R150 R151 R156 9 RESISTOR 10K 0805 Yageo 9C08052A1002FKHFT R142 R143 R148 R149 R154 R155 6 RESISTOR 1K 0805 Yageo 9C08052A1001FKHFT R152 1 RESISTOR 100 0805 Yageo 9C08052A1000FKHFT R119 R122 R125 R128 R131 R153 6 RESISTOR 100K 0805 Yageo 9C08052A1003FKHFT R158 1 RESISTOR 430 0805 Yageo 9C08052A4300FKHFT R160 1 RESISTOR 1 4K 0805 Yageo 9C0...

Страница 29: ...50C 13 or B550C 13F C152 1 CAPACITOR 10uF 16V TANTALUM 3528 Kemet T491B106K016AS C156 160 5 CAPACITOR 22uF 35V TANTALUM D SMT Kemet T495D226K035ASE300 S101 1 SWITCH DIP 7 POSITION SMT 0 1 CTS 219 7MST S102 1 HEADER 3POS 0 1 Through Hole AMP Tyco 640452 3 RL101 1 RELAY SPST 5VDC SMT Omron G6L 1F DC5 L101 L102 L103 L104 L105 5 INDUCTOR 1 3uH SMT Panasonic ETQ P6F1R3LFA C153 C154 C155 3 CAPACITOR 100...

Страница 30: ...o 103308 2 J203 J204 2 Connector modular female 8 position vertical Through Hole AMP Tyco 5556416 1 J205 1 Connector header 3 position 0 1 square post Through Hole AMP Tyco 644695 3 J206 J207 2 Connector header vertical 3 pos 0 1 spacing Through Hole Molex 22 02 2035 K201 1 Relay SPST 5Vdc coil SMT SMT Omron G6L 1F DC5 L201 L202 L203 L204 L205 L206 L207 L208 L209 L210 L211 L212 12 Inductor 0 01uH ...

Страница 31: ...C305 C312 C320 5 Capacitor ceramic 0 01uF 50Vdc 20 SMD 0805 Kemet C0805C103M5RACTU C304 1 Capacitor ceramic 0 022uF 50Vdc 10 SMD 0805 Panasonic ECJ 2VB1H223K C307 C308 C310 3 Capacitor ceramic 1000pF 50Vdc 10 SMD 0805 Kemet C0805C102K5RACTU C309 1 Capacitor ceramic 330pF 50Vdc 10 SMD 0805 Panasonic ECJ 2VC1H331J C313 C314 C315 C316 C317 C318 C319 4 DNS SMD 0805 D301 1 Diode TVS 30V 600W SMB Diodes...

Страница 32: ...ition SPST gold finish sealed CTS 219 5 SMD CTS Corporation 219 5MST U301 1 IC voltage regulator 5V output 500mA TO 252 National Semiconductor LM78M05CDT U302 1 IC digital attenuator 5 bit 1dB LSB SSOP 20 Skyworks Alpha AA110 85 U303 U304 U305 3 IC optoisolator dual transistor o p Vceo 30V SOIC 8 Fairchild MOCD211M U306 1 Directional coupler Mini Circuits DBTC 20 4 U307 1 IC power detector TSSOP 1...

Страница 33: ... 11 J601 J603 J604 J605 J606 J607 J608 J609 J610 J611 10 Connector modular jack 8 position vertical PCB mount Tyco 5556416 1 J602 1 Connector D sub 25 position female vertical PCB mount Kycon K85 BD 25S R ...

Страница 34: ...VI 12 Insight System Schematics The following pages contain the schematics for the Insight system ...

Страница 35: ...8V F101 see table SMBJ48A FM D101 SMBJ30A TV J101A J101D TAC 58V F104 see table V4 Cond 63V C104 100uF V4 Input ETQ P6F1R3LFA L104 SML LX1206GW D106 Green SML LX1206GW D108 Green SMBJ48A FM D103 SMBJ30A TV SMBJ48A FM D105 SMBJ30A TV SMBJ48A FM D107 SMBJ30A TV J101F GND IN SMBJ48A FM D109 SMBJ30A TV SML LX1206GW D110 Green ETQ P6F1R3LFA L105 V5 Input 63V C105 100uF V5 Cond TAC 58V F105 see table J1...

Страница 36: ...1uF C111 0 1uF C112 0 1uF C115 0 1uF C116 0 1uF C120 0 1uF I4 Buff INA168 5 1 2 3 4 U104 V4 Cond V4 Out J102D C124 0 1uF C119 0 1uF I3 Buff J102C V3 Out V3 Cond INA168 5 1 2 3 4 U103 C121 0 1uF C125 0 1uF OPA2340UA U107A OPA2340UA U107B C122 0 1uF C123 0 1uF C126 0 1uF C127 0 1uF R117 0 012 R118 0 012 R119 100k R122 100k R121 0 012 R120 0 012 R126 0 012 R127 0 012 R128 100k R125 100k R124 0 012 R1...

Страница 37: ...F C137 0 1uF C138 0 1uF C139 0 1uF C140 0 1uF Nav uPC Pow uPC Nav IN Pow IN P1 P2 P3 P4 P5 P6 P7 P8 U109 MOCD211M J103D J103A J103E J103B P1 P2 P3 P4 P5 P6 P7 P8 U110 MOCD211M Sel IN Res IN Sel uPC RESET 3 Vdc 3 Vdc J103C GND R129 0 012 R130 0 012 R131 100k R134 249k R133 3 3k 68 1k FM R132 37 4k TV R135 249k R136 249k R137 249k R138 249k R139 249k R145 10k R144 10k R143 1k R142 1k R141 10k R140 1...

Страница 38: ... CS SCK SIMO SOMI DVccP1 A3P2 A4P3 A5P4 A6P5 A7P6 P7 XinP8 XoutP9 P10 P11 P1 0P12 P1 1P13 P14 P15 P16 P17 P18 P19 P20 P21 P2 2 P22 P23 P24 P25 P26 P27 P28 SIMO0 P29 SOMI0 P30 UCLK0 P31 P32 P33 P34 P35 P36 P37 P38 P39 P40 P41 P42 P43 P44 P45 P46 P47 MCLK P48 P49 P50 P51 P52 P53 TDO P54 TDI P55 TMS P56 TCK P57 RST P58 A0 P59 A1 P60 A2 P61 AVss P62 DVss P63 AVcc P64 U112 MSP430F133 3 3 Vdc RESET CAN ...

Страница 39: ...term1 TXCANP1 RXCANP2 P3 P4 P5 P6 P7 P8 OSC1P9 VssP10 P11 P12 P13 SCK P14 P15 SI P16 SO P17 CS P18 RESET P19 Vdd P20 U113 MCP2510 J106G C149 0 01uF CAN CLK DP1 GNDP2 VccP3 RP4 P5 CANL P6 CANH P7 P8 U114 SN65HV232 CAN CS SCK SIMO SOMI 3 3Vdc RESET CANL 1 CANH 1 J105G TDO TDI TMS TCK JTAG header J107 R153 100k R152 100 A Sivacoe N Hendrickson User Interface Module B Insight Control System Date April...

Страница 40: ... 1F 5Vdc C150 100uF SML LX1206GW D113 Green LED1 D116 S1D 13 BkLtCtrl 10V tantalum C152 10uF Pin3LCD R159 10k 40 C155 100uF C154 100uF C153 100uF 5 Vdc 3 3 Vdc C151 1000uF L111 100uH Vin Vout Feedbk Gnd On Off U115 LM2576S 5 0 5 Vdc VgenCond D114 30BQ060 P1 P2 P3 P4 P5 P6 P7 P8 U118 LM2660M P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 U116 ULN2003 R160 1 4k R161 27k R162 6 2k R157 4 7 BZ...

Страница 41: ... J201a5 J201a7 J201a1 J201a3 J201a2 J201a4 DAC CS C201 0 01uF TDO TDI TMS TCK CAN CS SCK SIMO SOMI DVccP1 A3P2 A4P3 A5P4 A6P5 A7P6 P7 XinP8 XoutP9 P10 P11 P1 0P12 P1 1P13 P14 P15 P16 P17 P18 P19 P20 P21 P2 2 P22 P23 P24 P25 P26 P27 P28 SIMO0 P29 SOMI0 P30 UCLK0 P31 P32 P33 P34 P35 P36 P37 P38 P39 P40 P41 P42 P43 P44 P45 P46 P47 MCLK P48 P49 P50 P51 P52 P53 TDO P54 TDI P55 TMS P56 TCK P57 RST P58 A...

Страница 42: ...c2 J201d2 GND 1 GND 2 RESET 1 RESET J201d8 J201c8 CANH 2 CANL 2 3 3Vdc CANterm2 CANterm1 J201d7 C213 0 01uF CAN CLK DP1 GNDP2 VccP3 RP4 P5 CANL P6 CANH P7 P8 U203 SN65HV232 CAN CS SCK SIMO SOMI 3 3Vdc RESET CANL 1 CANH 1 J201c7 TDO TDI TMS TCK JTAG header J202 U204 MCP2510 R201 100 N Hendrickson A Sivacoe Coupler Conditioning 1 04 Insight Control System Date June 17 2005 Page 2 of 4 Rev ID ...

Страница 43: ...P SOFT RES RESET OVERDRV VSWR TEMP PSU 5 Vdc LED1 LED2 D203 D204 3 3 Vdc RFL OUT FWD OUT DRVR DIS 5 Vdc J205 J201 b7 DISABLE K201 D205 L205 0 01uH C215 0 01uF C214 0 01uF 4 203 RN 1k 8 203 RN 1k 3 202 RN 10k 4 202 RN 10k 1 202 RN 10k 2 202 RN 10k 3 203 RN 1k 1 203 RN 1k 6 203 RN 1k 7 203 RN 1k 2 204 RN 10k 3 204 RN 10k 1 204 RN 10k 7 202 RN 10k 6 202 RN 10k 9 202 RN 10k 8 202 RN 10k R204 1k R203 1...

Страница 44: ...40UA U214A OPA2340UA U214B FWD IN RFL IN FWD POW RFL POW 3 3 Vdc VR202 VR201 C217 0 01uF L210 0 01uH L212 0 01uH C224 0 01uF C225 0 01uF C228 0 01uF C229 0 01uF L207 0 01uH L209 0 01uH C222 0 01uF C223 0 01uF C226 0 01uF L211 0 01uH C227 0 01uF C218 0 01uF C219 0 01uF L208 0 01uH C221 0 01uF C220 0 01uF R214 1k R215 10k R216 10k R219 1k R217 1k R223 1k R221 1k R218 1k R222 1k R220 1k R224 1k N Hen...

Страница 45: ...8dB in 1dB in 2dB in P1 P2 P3 P4 P5 P6 P7 P8 U304 P1 P2 P3 P4 P5 P6 P7 P8 U303 5 Vdc C305 C304 CTL 16dB CTL 8dB CTL 4dB CTL 2dB CTL 1dB P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 U302 Alpha 110 85 J303 J304 4 J304 2 J304 1 J304 5 J304 3 J304 7 R303 R302 R304 R301 R322 R312 R313 R319 R318 R321 R320 R317 R316 R311 R310 R314 R315 R308 R309 A Sivacoe N Hendrickson RF Condit...

Страница 46: ...utdown C310 C311 5 Vdc C309 C308 C307 DIP16 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 U307 AD8362 V V DIR COUPLER U306 DBTC 20 4 HYBRID COUPLE U308 SAGE WIRE HCT2 R329 R328 R327 R326 R325 R305 R307 R324 R323 A Sivacoe N Hendrickson RF Conditioning Module 1 04 Insight Control System Date Sept 19 2005 Page 2 of 2 Rev ID ...

Страница 47: ...1 1uF J1G DRV DIS TMP GND TMP CS TMP SO TMP SCK TMP VCC J1C J1H J1D J1B J1A TMP VCC P1 P2 P3 P4 P5 P6 P7 P8 U1 LM70 N Hendrickson A Sivacoe Temperature Sensor Board 1 02 Insight Control System Date May 8 2005 Page 1 of 1 Rev ID ...

Страница 48: ...2 3 4 5 6 7 8 1 J611 OUT 1 2 3 4 5 6 7 8 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 OUT 8 OUT 7 OUT 6 OUT 5 OUT 4 OUT 3 OUT 2 8 7 6 5 4 3 2 OUT 1 1 J609 8 7 6 5 4 3 2 1 J608 IN 8 IN 7 IN 6 IN 5 IN 4 IN 3 IN 2 IN 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 J602 F604 8 7 6 5 4 3 2 1 J603 F602 8 7 5 4 3 2 RESET Soft RES 3 3 Vdc CAR down 5 Vdc CAR up CAR off CAR on ground ODRVfl...

Страница 49: ...ng 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 ...

Страница 50: ...long life and continued performance from the power amplifier The building must be clean dry temperature controlled and secure Don t forget to allow space in the building for any additional racks to house test equipment a workbench area line regulating transformers ladders equipment and parts storage first aid kit emergency generator if used as well as heating and cooling devices that may be unique...

Страница 51: ...ional 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 Also do not position intake near exhaust s preheated air If air conditioning is required to cool the shelter discuss the situation with a qualified HVAC technician Under average c...

Страница 52: ...trical code in your area any applicable provincial or state codes and good engineering practice Special consideration should be given to lightning protection of all systems in view of the vulnerability of most transmitter or translator sites to lightning Lightning arrestors are recommended in the service entrance Straight and short grounds are recommended The electrical serviced must be well groun...

Страница 53: ...nd wind loading of the system Attaching the transmission line to the tower is crucial to maintain a safe and reliable operation Nylon wire ties and electrical tape will breakdown in the sunlight and ultimately fail creating a potentially dangerous situation It is important to use proper clamps and hoisting grips and also ensure that the transmission line is grounded to the tower in several locatio...

Страница 54: ...that it be secure from wildlife Use sturdy construction materials including sheet metal if necessary Holes around conduit cable and other similar entry points should be stuffed with steel wool and caulked to prevent entry of wildlife Other features of security for your shelter may include its location with respect to the prevailing wind conditions A location leeward of some natural topographical f...

Страница 55: ...an failures Inspect all connectors for bent connector pins If the equipment is damaged a claim should be filed with the carrier once the extent of the damage is assessed Technalogix cannot stress too strongly the importance of immediate careful inspection of the equipment and subsequent immediate filing of the necessary claims against the carrier if necessary If possible inspect the equipment in t...

Страница 56: ...alogix Ltd VIII 7 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 ...

Страница 57: ... start feature RF IN RF input from modulator or processor BNC connector 50 ohm RF OUT 100 watt RF output Connects to inline wattmeter not supplied and antenna N connector 50 ohm REMOTE PORT Port to monitor and control the amplifier externally See Monitor and Control section for pin out AC IN AC input to switching power supply AC BREAKER Resettable circuit breaker is used to protect against inrush ...

Страница 58: ... respective manuals for a transmitter or translator Do not connect the modulated signal from the RF OUT on the modulator or processor to RF IN on the power amplifier at this time Because of the characteristics of LDMOS devices the RF drive should not be connected to the power amplifier until after the power supply and bias voltages are present and stable 6 Plug power amplifier into AC mains 7 Swit...

Страница 59: ...ting connector 3 Plug the modulator or processor into AC mains 4 Plug the 3U power amplifier enclosure into AC mains 5 Switch AC rocker switch to ON position 6 Verify that the power amplifier enclosure s fan is on 7 Ensure that the modulator processor is turned on and set up according to its instructions Depress the POWER tactile button to turn the unit on 8 The internal soft start circuitry will ...

Страница 60: ...igh VSWR be detected the system will automatically shut down and cycle as previously described This reading is also displayed as a percentage of rated forward power 12 Verify that the power supply reads approximately 28 Volts DC see supplied final inspection sheet for factory settings of power supply levels on the LCD of the power amplifier 13 Look at the transmitted output using a suitable monito...

Страница 61: ... of the AC inlet cords Remove the top lid by unscrewing the 6 32 machine screws Use extreme caution when working near the AC input terminal The power amplifier and power supply store hazardous capacitances and voltages Using either compressed air or a brush with soft bristles loosen accumulated dust and dirt and then vacuum the interior of the cabinet Complete a visual inspection of the interior m...

Страница 62: ...rmining the fault if some aspect of the system is not operating The following table deals with quality of operation 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 Incorrec...

Страница 63: ...Thank you for choosing Technalogix Ltd ...

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