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2/25/03

888-2473-001

4-9

WARNING: Disconnect primary power prior to servicing.

Section 4 Theory of Operation

ATLAS Series™

g.

ALC - Automatic Level Control. The ALC signal is used to control the trans-
mitter power output and is normally sent digitally over the CAN bus. This
line carries a voltage from the Main Controller to the PA Modules which is an
analogue version of the digital ALC signal sent over the CAN bus. It is a
backup signal only used by the modules if the CAN bus fails and the modules
lose communication with the Main Controller. If the CAN bus is operational,
this signal is not used.

4.3.5

Main Controller

The Main Controller is the primary interface between the transmitter and the
operator via the front panel Graphical User Interface or GUI. It is connected to all
transmitter subsystems, both internal and external to the transmitter, through either
an RS-232 serial port or the CAN (Controller Area Network) bus and dedicated
parallel control lines. The CAN bus and the parallel control lines are distributed on a
single multi-conductor cable called the System Control Bus.

The Main Controller is mounted directly behind the front control panel. It is directly
connected to the front panel switchboard which is considered a "Mezzanine" board.
The front panel switchboard uses a CPLD to serialise the I/O (the control lines and
status signals) to and from the Main Controller.

4.3.5.1

Transmitter Control

The Main Controller is the central point for all system control, metering and
diagnostics. It reports this information to the operator via the Graphical User
Interface or GUI and through several remote control options.

4.3.5.1.1 Graphical User Interface (GUI)

The GUI is a touchscreen LCD display which is equivalent to 1/4 of a VGA display.
This is the primary local interface for the operator but is not required to operate the
transmitter. The primary operator controls, ON, OFF, Raise, Lower are located on
the front panel next to the GUI. Operation and navigation of the GUI is covered in
Section 3 of this manual.

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Содержание Atlas DVL400

Страница 1: ...Atlas Series T M No 888 2473 001 Copyright Harris Corporation 2002 2003 All rights reserved TECHNICAL MANUAL 888 2473 001 Atlas Series DVB T UHF Transmitter Rev C Feb 25 2003 DVB T UHF Transmitter...

Страница 2: ...Number Unpacking Carefully unpack the equipment and preform a visual inspection to determine that no apparent damage was incurred during shipment Retain the shipping materials until it has been determ...

Страница 3: ...ge 2 7 Rev B Sept 12 2002 Add two pages to front pages as stated in ECO 48448 RTTE Compliance Statement ATLAS Declaration Rev C Feb 25 2003 14045 Add parts list as seperate Acrobat file to section 7 A...

Страница 4: ...888 2473 001 WARNING Disconnect primary power prior to servicing MRH 2...

Страница 5: ...esignators for the item i e C001 R102 etc that corresponds to the number found in the schematics C001 in a bill of material is equivalent to C1 on the sche matic or 2 gives added information or furthe...

Страница 6: ......

Страница 7: ...ks During installation and operation of this equipment National and local building codes and fire protection standards must be observed WARNING ALWAYS DISCONNECT POWER BEFORE OPENING COVERS DOORS ENCL...

Страница 8: ......

Страница 9: ...ctive 1999 5 CE Par la pr sente HARRIS Broadcast Communications d clare que ce ATLAS SERIES DVB T Transmitter est conforme aux exigences essentielles et aux autres dispositions de la directive 1999 5...

Страница 10: ...CE Spanish Por medio de la presente HARRIS Broadcast Communications declara que el ATLAS SERIES DVB T Transmitter cumple con los requisitos esenciales y cualesquiera otras disposiciones aplicables o e...

Страница 11: ......

Страница 12: ......

Страница 13: ...w Rate 2 18 Setting the Test Load Flow Switch Trip Level 2 18 Setting the Heat Exchanger Fan Turn ON Temperatures 2 19 Verifying Pump Switching 2 19 Local Pump Operation 2 20 Setting Exciter Parameter...

Страница 14: ...tors 4 27 Reject Load RF Detector Relative 4 28 Precision RF Power Detectors 4 30 Normal Mode Life Support Mode 4 30 Power Supplies 4 31 AC Input 4 31 PA Power Supply Modules 4 31 Low Voltage Power Su...

Страница 15: ...installa tion procedures for the transmitter cooling and RF systems and basic remote control connections Section 3 Operation provides operation and navigation information for the Graphical User Inter...

Страница 16: ...rams of the different models and system specifications The Atlas Series DTV transmitter consists of one or two cabinets depending on power level See Table 1 1 for a listing of the available models and...

Страница 17: ...mitter configurations The available models are listed below in Table 1 1 Table 1 1 Atlas Series Transmitter Models Tx Models Cabinets PA Modules Output Power Primary Cooling DVL 400 1 1 400W LIQUID DV...

Страница 18: ...Series Medium Power System Block Diagram 400W up to 3kW DVL 3000 shown Exciter A Exciter B Drive Control Unit RF Monitor DVB Filter Reject Loads PA 1 PA 2 PA 3 PA 4 PA 5 PA 6 PA 7 PA 8 PS 1 32V PS 2...

Страница 19: ...S LVPS AC Power 380 400 415 VAC 3 Phase 5 7kW RF Samples Power Supply Monitor Model DVL 5700 Cabinet 2 RF Drive from Cabinet 1 RF Output from Cabinet 1 3 4kW DVB Filter Control PS Bus from Cabinet 1 N...

Страница 20: ...Controller is responsible for system level control issues which effect multiple systems since it is the only part of the control system which can monitor the entire transmitter b Module Controllers 1...

Страница 21: ...tection 1 2 3 3 In System Programming or ISP The use of the CAN bus for communication between the various Micro Modules in the transmitter also allows for easy updating of the software used in each tr...

Страница 22: ...for cabinet phasing for the 2 cabinet transmitters to minimise cabinet combiner reject power c DC Distribution Board Provides FET switching of the 32Vdc and sensing of driver and pallet currents d Pr...

Страница 23: ...1 2 5 Power Supplies Up to four 32 Vdc power supplies are used to provide the DC voltage to the PA modules within each PA cabinet Each power supply provides power to two PA modules Module power suppli...

Страница 24: ...ontrol Panel The cooling system control panel controls the pump module and the heat exchanger and is the interface to the transmitter control system It uses very basic relay logic for reliable operati...

Страница 25: ...half of the control panel contains the ac isolation switch which disconnects ac power from the pump module and heat exchanger as well as the control circuitry in the control panel itself 1 2 6 2 Pump...

Страница 26: ...fans will actually start The first one turns on when the coolant temperature reaches 32oC with the second one turning on at 38oC 1 2 6 4 Transmitter Cold Plates Each PA Module has an attached liquid...

Страница 27: ...iant source equipment A flexible Bit Rate Adaptation mechanism with PCR Program Clock Reference restamping is provided giving an independence between the multiplexer rate and the DVB T rate Test gener...

Страница 28: ...2 MHz from center of channel for a 8 Mhz DTV channel Model Power DVL400 450W DVL800 850W DVL1100 1 25kW DVL1500 1 7kW DVL2200 2 5kW DVL3000 3 4kW DVL4300 4 7kW DVL5700 6 2kW System Output Power after...

Страница 29: ...66 Transmitter Processing Delay msec From TS input to RF output Used in SFN operation programmabl e to 1 sec max Spurious Radiation Harmonics and spurious emissions dBc After Mask Filter referenced to...

Страница 30: ...does not include cooling pump module and heat exchanger 65 Residual Heat transferred to room kW Maximum per transmitter cabinet with 8PAs 3 9 Physical Dimensions mm Single Cabinet Transmitter DVL400 t...

Страница 31: ...entation that ships with the transmitter in addition to this manual a Drawing Package with a complete set of prints for the transmitter This should have your transmitter model number printed on the fr...

Страница 32: ...onents based on minimum required clearances 1 843 5550 169 DVL400 DVL2200 Sheet 1 gives dimensions using the Teracom filter while sheet 2 shows the Spinner filter 2 843 5550 171 DVL3000 Sheet 1 gives...

Страница 33: ...ormation in the schematics should be considered the most accurate All connections listed in this section should be verified with the schematics before initial turn on 2 4 Transmitter Cabinet Placement...

Страница 34: ...00 DVL 3000 a Electrical Installation Diagram 843 5550 189 b AC Power Flow Diagram 843 5550 188 c Cooling System Electrical Diagram 843 5396 865 d Cooling System Layout 843 5550 170 DVL 4300 DVL 5700...

Страница 35: ...Connect the AC wiring between the cooling control panel and the pump module and heat exchanger Follow the AC Power Flow Diagrams and Electrical Installation Diagrams mentioned at the beginning of this...

Страница 36: ...o J18 9 and J18 10 on the External I O board in the transmitter This will mute the transmitter rf output if there is no coolant flow through the test load provided the U Link is in position 2 transmit...

Страница 37: ...A closed contact is required to operate the transmitter Some switches may also use 15V and ground The connections are as follows J18 11 to flow switch terminal 1 common J18 12 to flow switch terminal...

Страница 38: ...inet The top of the transmitter cabinet has pre cut holes for conduit connections as shown in the outline drawing The AC input is routed down through the hollow space on the left side of the transmitt...

Страница 39: ...must be less than a 5 imbalance between the phases to allow the transmitter to operate Verify that the single phase step down transformer is tapped correctly This step is not required on single phase...

Страница 40: ...er in Cabinet 1 to TB2 in Cabinet 2 for the low voltage supplies The connections are as follows Wire W61 connects from TB2 terminal 3 in Cabinet 1 to TB2 terminal 1 in Cabinet 2 Wire W62 connects from...

Страница 41: ...t each site For 2 cabinet systems see 2 10 1 RF Sample Connections Connect a ground strap from the transmitter cabinet E7 to the station ground There is a brass ground block located in the center of t...

Страница 42: ...e with a coupling chart which can be used for calbration purposes 2 10 1 RF Sample Connections Connect the RF Sample from the cabinet combiner reject load to J17 of the RF monitor board in Cabinet 1 T...

Страница 43: ...o be turned on if the U Link is installed Connect the U Link status switches S1B and S2B to the RF switch status inputs on J14 of the External I O Board in the transmitter This allows the GUI to displ...

Страница 44: ...te slot num ber Placing the module in a different slot will not cause any harm to the transmitter but will require more time for module phasing Connect the Coolant hoses to the rear of the PA Modules...

Страница 45: ...upply is installed it should be active at this time Some UPS units have an on off switch which must be pressed Turn on the fan circuit breaker CB4 This will start the cabinet flushing fans in the back...

Страница 46: ...There should be NO red indications or faults present If a fault is present see Section 6 Diagnostics for more information This screen is shown in Figure 3 27 on page 3 24 NOTE A common fault is a 3 ph...

Страница 47: ...ery tank at the pump module must be filled to half capacity with the recommended 50 50 glycol and water mixture NOTE If water is readily available at the site it is recommended that the system is fill...

Страница 48: ...orientation WARNING DISCONNECT THE PRIMARY POWER AT SOURCE BEFORE INTERCHANGING WIRES Check the Cooling Control Panel status lights Depending on the coolant level in the tank there are indicators for...

Страница 49: ...w switch trip level until the GUI displays Load Interlock Closed Verify that the flow switch operates correctly by decreasing the amount of flow through the load The interlock should OPEN Go back to t...

Страница 50: ...ss SYSTEM then SYSTEM COOLING This screen is shown in Figure 3 32 on page 3 28 Select manual pump switching Button should display MANUAL ENABLED Press pump select button for PUMP A ON then PUMP B ON T...

Страница 51: ...o Remote operation 2 13 2 Setting Exciter Parameters Set transmitter to OFF Set the Exciter Configuration Press DRIVE CHAIN DRIVE SERVICE and EXCITER CONFIG The Exciter Configuration screen is shown i...

Страница 52: ...nk and DTE port for the Atlas Main Controller communications link The communications screen page from the V XCAST software should be as shown in Figure 2 7 Once the COFDM modulation and ASI input para...

Страница 53: ...Figure 2 8 PA Meters Screen Switch ON the AC breakers on the front of the PA power supply modules Press the transmitter ON button Verify that the reflected power is under 10 watts The PA Meters scree...

Страница 54: ...on site phasing of the 2 cabinets will most likely be required At full nominal power output all of the detected rf sample readings shown in Figure 2 9 should read below 0030 with the Gain button set...

Страница 55: ...follows J13 and J14 Remote Transmitter Control Functions J15 and J16 Remote Status Outputs J17 Remote Analogue Metering Outputs NOTE The forward slash in front of a signal name means active low The s...

Страница 56: ...3 3 INPUT 2 REMOTE_OFF J13 4 INPUT 3 REMOTE_RAISE J13 5 INPUT 4 REMOTE LOWER J13 6 GND Ground J13 7 GND Ground J13 8 INPUT 5 REMOTE_DRA B_SEL Remote Drive Chain A B Select Toggle J13 9 INPUT 6 REMOTE_...

Страница 57: ...rwise an external supply will have to be connected to J16 11 J16 3 OUTPUT 1 Off On Status J16 4 OUTPUT 2 Life Support Status J16 5 OUTPUT 3 RF Mute Status J16 6 OUTPUT 4 Ext Intlk Status External Inte...

Страница 58: ...Section 2 Installation Initial Turn On ATLAS Series J15 10 OUTPUT 16 ASI 1 2 SEL Status J15 11 VDC_EXT_SUPPLY Input For External Pull Up Supply Voltage J15 12 GNDB Isolated Ground Table 2 4 J15 J16 Ex...

Страница 59: ...Table 2 5 Table 2 5 J17 External I O Board Remote Power Metering Connection Schematic Label Metered Parameter J17 1 GND Ground J17 2 VOUTA Total Forward Power After Filter J17 3 VOUTB Total Reflected...

Страница 60: ...2 30 888 2473 001 2 25 03 WARNING Disconnect primary power prior to servicing Section 2 Installation Initial Turn On ATLAS Series...

Страница 61: ...erface GUI Touchscreen display NOTE Operation of the V XCAST exciter is covered in a separate manual which came with the transmitter 3 2 Transmitter Control Panel The front panel user interface is a 1...

Страница 62: ...s quick access to the required and relevant diagnostics information without having to be familiar with a menu structure NOTE To differentiate these buttons from the ones which show up on the LCD dis p...

Страница 63: ...the filter c Transmitter Forward power output reading in a Bargraph format for multiple cabinet transmitters this would be a system power reading and not for a single cabinet The 100 mark is based on...

Страница 64: ...he Power Supply button f Transmitter Channel Figure 3 3 Home Screen It also has the global status and operation information at the top of the screen which shows the transmitter status and if there are...

Страница 65: ...o a navigation button shown to the right for the second PA cabinet to allow access to information specific to that cabinet Pressing either of these buttons will take you to the Power Amp screen shown...

Страница 66: ...the optional dual drive system is installed Specifically it includes a The operational and on air status of 1 or 2 exciters the second exciter is optional as well as the status of the ASI input to ea...

Страница 67: ...an exciter or driver has been removed for service or for any application where an automatic switch to the alternate drive chain is not desired 2 Drive Chain A B This is the manual drive chain switch...

Страница 68: ...r in the Drive Control Unit or DCU Figure 3 6 Drive Chain Meters Screen 3 5 3 Drive Service When the Drive Service button in Figure 3 4 is pressed it will bring up the screen shown in Figure 3 7 Press...

Страница 69: ...ice Exciter Setup To change an exciter parameter simply tap the text window that contains the parameter you wish to change This will bring up the appropriate Pop up window which can then be used to ed...

Страница 70: ...the Amp Correction and Filter Compensation tables must be done using the ITIS V XCAST software running on an external PC and connected directly to the exciters via a serial connection ASI Input Can b...

Страница 71: ...reens read the modulation and input settings from the exciters s allowing the settings to be checked without connecting directly to the exciters with an external serial connection To change the settin...

Страница 72: ...isplay readings A digital power meter is required to measure the DCU output Then by pressing the CHANGE button next to the reading to be calibrated the and buttons can be used to change the reading to...

Страница 73: ...at the bottom of the screen Each of the amplifier select buttons in the middle of the screen are for navigation to Module Status screens which have detailed fault status information on each module The...

Страница 74: ...PA Faults screen in Figure 3 13 shows that PA Module 1 in PA Cabinet 1 has no faults The NEXT and PREVIOUS buttons are used to access fault information on each module Since all of the possible fault...

Страница 75: ...lete set of PA Meter readings is given in the Factory Test Data The Factory Test Data readings are taken at nameplate power unless otherwise specified by the customer A full set of readings should als...

Страница 76: ...r troubleshooting purposes The 8 PA Module buttons in the middle of the screen are toggle switches Press it once and the PA module shuts off Press it again and the module turns on The front panel ON b...

Страница 77: ...one after the transmitter has been operating at nominal power output in an average ambient temperature for at least 20 minutes NOTE Transmitter carrier power will be removed for about 5 seconds Howeve...

Страница 78: ...n will be grayed out Notice that each button gives a status indication of OK or Fault along with cabinet Forward and Reflected power before the filter Output Control The control area at the bottom of...

Страница 79: ...This screen shows faults which are considered Cabinet or System level such as VSWR Power High foldback etc An active fault will be highlighted in RED A warning condition will be highlighted in YELLOW...

Страница 80: ...r and also gives the VSWR PA Cabinet Forward Reflected and VSWR for each cabinet Figure 3 22 Output Metering Screen 3 7 3 Output Service This screen is accessed from the Output System screen in Figure...

Страница 81: ...creen shows the relative power at each of the PA module combiner reject loads For a 2 cabinet system it also shows the relative power at the Cabinet combiner reject load This screen should only be acc...

Страница 82: ...also calculates the VWSR protection thresholds of Foldback power and Fault threshold and displays them at the bottom of the screen These values are based on the Nominal Power Output value entered into...

Страница 83: ...PS Faults Fault list and status PS Meters Detailed metering PS Service Help screen Notice that this screen is also showing that PS4 has a fault and has basically shut off at 0 1V This also causes the...

Страница 84: ...led explanation of these faults refer to Section 6 Diagnostics Figure 3 27 PS Faults Screen 3 8 2 PS Meters This is the detailed metering screen for the AC Mains PA PS and LV PSU For multiple cabinet...

Страница 85: ...3 25 WARNING Disconnect primary power prior to servicing Section 3 Operation ATLAS Series 3 8 3 PS Service This is an on line help screen telling how to remove a power supply Figure 3 29 PS Service S...

Страница 86: ...d be a problem with any of the serial communication links inside the transmitter b System Cooling For more in depth information press System Cooling 1 Cooling Pump Can read A or B for dual pump system...

Страница 87: ...the status of each of the 5 hard wired par allel control lines which are distributed to all transmitter controllers b Serial Communications This section is monitoring the CAN Controller Area Network w...

Страница 88: ...sed as shown placing the pump control in auto switch mode In this mode a pump failure will automatically cause a switch to the redundant pump Manual mode dis ables the automatic pump switching 2 Pump...

Страница 89: ...ed in RED while a warning condition is highlighted in YELLOW For more information on these faults refer to Section 6 Diagnostics Figure 3 33 Cooling Faults Screen 3 9 2 3 Cooling Meters This screen is...

Страница 90: ...3 Operation ATLAS Series 3 9 2 4 Cooling Service This screen is accessed by pressing the Cooling Service button on the System Cooling screen It is a cooling system maintenance checklist and reminder T...

Страница 91: ...ure 3 36 shows that only faults 31 and 36 are active all other faults are inactive Use the Next and Previous buttons to view the entire list A complete listing of all faults which can show up in this...

Страница 92: ...tem Service button in Figure 3 30 on page 3 26 This screen simply provides information concerning the use of the sub menus accessed from this point These are a System Setup 1 Control Setup a Touchscre...

Страница 93: ...a couple of things 1 It is used to set the 100 mark on the power bargraph at the top of every GUI screen 2 It is used to calculate the VSWR foldback and fault thresholds see 3 7 3 2 Output Setup on pa...

Страница 94: ...39 Control Setup Screen 3 9 4 1 2 Touch Screen Calibration If the touch screen soft buttons on the GUI are working and seem to be accurate then this procedure is not required If the soft buttons on th...

Страница 95: ...gure 3 41 STEP 3 To test the calibration simply touch the screen in several places to make sure an X shows up where you touched STEP 4 If the calibration is good then press ACCEPT If not press CANCEL...

Страница 96: ...hould be known before calling for technical support Figure 3 42 Software Revisions Screen 3 9 4 2 1 Hardware Revisions This screen shows the hardware revisions for all of the transmitter control board...

Страница 97: ...The shaded block at the top of each menu tree represents the Main Menu which is accessed using the Quick navigation hardware button on the Control Panel or one of the 5 software buttons on the right s...

Страница 98: ...es Figure 3 45 Power Amp Menu Structure Figure 3 46 Output Menu Structure POWER AMP PA Faults PA Meters PA Service More PA Faults More PA Meters PA Module Removal PA Module Alignment Main Menu Auto Bi...

Страница 99: ...upply Menu Structure Figure 3 48 System Menu Structure POWER SUPPLY PS Faults PS Meters PS Service Main Menu SYSTEM System Control System Cooling System Log System Service System Setup Software Revisi...

Страница 100: ...3 40 888 2473 001 2 25 03 WARNING Disconnect primary power prior to servicing Section 3 Operation ATLAS Series...

Страница 101: ...hout the text as needed The Atlas Series UHF transmitter has 8 liquid cooled power levels not including dual transmitter configurations The models are listed in Table 4 1 A fully populated single cabi...

Страница 102: ...Diagram Descriptions For a basic transmitter overview and block diagram descriptions refer to Section 1 Introduction There is an overall transmitter block diagram at the front of the schematic package...

Страница 103: ...nter connections from the Main Controller to the various sub systems inside the transmitter cabinet Figure 4 1 Control System Simplified Block Diagram NOTE The Web browser and network interface will b...

Страница 104: ...puts for analogue metering c A serial EEPROM for non volatile memory storage d A built in clock running at 4 194MHz which will let the micro run at 16 25MHz e Power failure detection f A watchdog whic...

Страница 105: ...e CAN bus to the Main Controller for display on the front panel control screen or a remote control system If the micro module wants to send a control command it simply addresses the correct I O line o...

Страница 106: ...nt of each Message Frame e g ON OFF PS 1 Voltage Coolant Flow OK etc is labeled by an identifier that is unique throughout the network All other nodes on the network receive the message and each perfo...

Страница 107: ...pond to information relevant to each controllers operation All control boards also have the ability to send information over the CAN bus All fault reporting and status and metering information display...

Страница 108: ...This is a latching type signal that requires user input to clear the fault and turn the transmitter back on This sig nal is active low The Main Controller PS Monitor External I O and RF Monitor Board...

Страница 109: ...ea Network bus and dedicated parallel control lines The CAN bus and the parallel control lines are distributed on a single multi conductor cable called the System Control Bus The Main Controller is mo...

Страница 110: ...not used at present c 1 serial port J90 is available for operator connection to run the In System Programming or ISP software supplied by Harris to update the software for the Main Controller and or...

Страница 111: ...onal Under normal operating conditions the GUI or a remote control should be used to switch pumps Also keep in mind that drive switching and pump switching are both automatic functions should there be...

Страница 112: ...n to an external computer or modem for serial remote control applications applications provided by customer 3 The last one is part of the External I O Control cable which connects to the Main Controll...

Страница 113: ...alled as follows J18 1 to J18 2 Interlock 1 J18 3 to J18 4 Interlock 2 J18 5 to J18 6 Interlock 3 J18 7 to J18 8 Interlock 4 To use any one of the interlocks simply remove a jumper and connect the ter...

Страница 114: ...ION OF PERSONNEL IS AN ISSUE While this interlock can be used for any purpose where it is desired to mute the RF temporarily the primary purpose is for use on a flow switch of a water cooled resistive...

Страница 115: ...urations which are shown on the DCU Wiring Diagram 843 5550 078 Configuration 1 DVL 400 DVL 3000 with Single Exciter For this configuration the DCU consists of a sample coupler for monitoring of the e...

Страница 116: ...kplane Interface Used in all transmitter models with 4 modules or less Figures 4 7 4 9 and 4 10 show the RF splitter configuration as part of the complete 4 3 and 2 PA module systems Note the resistiv...

Страница 117: ...modules is determined by the transmitter power level or model and is given in Table 4 1 A fully populated cabinet has 8 PA Modules Each PA module has a smart controller which interfaces via the CAN a...

Страница 118: ...ions which are key to operation of the module a It acts as a gain block to increase the RF input to a level that is sufficient to drive the predriver pallet b It has an RF input switch which is used t...

Страница 119: ...voltage will only be used if CAN communications are lost The forward power output of the module is based on the factory calibration of the forward power sample from the pallet combiner inside the mod...

Страница 120: ...re should be done at regularly scheduled intervals and is initiated manually using the GUI NOTE When the biasing procedure is initiated the module will be muted and trans mitter RF output will be affe...

Страница 121: ...toring and module ALC Automatic Level Control The reflected sample is used to protect the module from excessive VSWR 4 4 4 6 DC Distribution Board The DC Distribution board is basically a 32Vdc MOSFET...

Страница 122: ...of hybrids optimised to work across the entire UHF frequency band from 470MHz to 860MHz There are several combiner configurations depending on the number of PA modules Figure 4 6 shows a full 8 way P...

Страница 123: ...5 03 888 2473 001 4 23 WARNING Disconnect primary power prior to servicing Section 4 Theory of Operation ATLAS Series Figure 4 6 8 Way RF System DVL 3000 and DVL 5700 Figure 4 7 4 Way RF System DVL 15...

Страница 124: ...RF System DVL 2200 and DVL 4300 Figure 4 9 3 Way RF System DVL 1100 NOTE NOTE NOTE Input line length to PA3 and PA6 adjusted due to the fact that 4 77 1 76 hybrids do not have a perfect 90 degree rela...

Страница 125: ...Phase and Gain from the control panel The isolation loads are mounted on the water cooled heatsink or Cold Plate on the side of the cabinet Attenuators AT1 AT4 are 500W while attenuators AT5 AT8 are...

Страница 126: ...eject power loads from the modules c Monitoring system forward RF power d Monitoring system reflected RF power e Maintaining hardware trip points for reject loads and forward and reflected power sense...

Страница 127: ...true RMS detectors that are linear at all power levels giving the accurate readings required for metering and VSWR protection Parameters monitored by the RF detectors include a Reject load 1 power b R...

Страница 128: ...combiner reject load power When you leave the Phase Align screen on the GUI all detectors default back to the Low gain setting The reject load RF detector samples are used for 2 purposes Overload prot...

Страница 129: ...old of the comparator using the EEPOT for 3 4Vdc instead of the 3Vdc used at the reference frequency The comparator is now calibrated to trip when 500W is applied to the reject load being monitored wi...

Страница 130: ...the reject power is minimised in the Low gain setting the gain of the detector can be increased to High to allow for better resolution and thus better phase alignment of the PA Modules 4 4 6 3 Precisi...

Страница 131: ...AC output from T1 is also sent to the second cabinet eliminating the need for a second step down transformer Use of the step down transformer also eliminates the need to run a neutral line to the tran...

Страница 132: ...oltage is used to drive all the logic contained on the various control boards throughout the Atlas transmitter The 7 5 volt output will be regulated on each board with a linear regulator to step down...

Страница 133: ...The switches set the following parameters a Cabinet ID The number of the PA cabinet 1 8 b Single or dual low voltage power supplies LVPS c 3 phase or single phase power d Number of PA power supply mod...

Страница 134: ...cabinet There may be from one to four power supplies in each cabinet depending on the transmitter model The Power Supply Monitor board also interfaces and controls the remote enable disable function o...

Страница 135: ...able 4 3 on page 4 37 shows the analogue metering sample levels and scaling factors used for the metering display The MOV board also provides four discrete lines to the PS Monitor Board to indicate wh...

Страница 136: ...ill monitor the output of a comparator circuit which is calibrated to trip when the coolant temperature exceeds 55oC If the coolant temperature exceeds 55oC the transmitter will be shut off but the pu...

Страница 137: ...t 8 PS1_ 15v 15vdc 3 0vdc PS1 15v output 9 PS2_ 7 5v 7 5vdc 3 0vdc PS2 7 5v output 10 PS2_ 15v 15vdc 3 0vdc PS2 15v output 11 PS2_ 15v 15vdc 3 0vdc PS2 15v output 12 SPARE 13 SPARE 14 7 5v 7 5vdc 3 0v...

Страница 138: ...Supply 3 Disabled DC OFF OFF Disabled DC ON AMBER RED GRN Enabled DC OFF RED Enabled DC ON GRN 11 PA Power Supply 4 Disabled DC OFF OFF Disabled DC ON AMBER RED GRN Enabled DC OFF RED Enabled DC ON GR...

Страница 139: ...l switches 1 Coolant Warning Indicates low coolant level Alarm only system continues to operate 2 Coolant Fault Tank is empty system is shut off e An in line coolant strainer with isolating valves to...

Страница 140: ...PA module reject loads are mounted The reject load cold plates are mounted in the rear of the PA cabinet on the upper left side when looking from the back of the transmitter 4 6 4 Pump Control Panel...

Страница 141: ...mp B Select line would pass through K9 and activates K2 and K5 Relay K3 sends an active low Remote sta tus output to the transmitter for operator status and lights the Remote LED H2 on this control pa...

Страница 142: ...elect relays on the Atlas External I O board It is fused in the transmitter at 5A by fuse F1 There is a green LED on the External I O board that will be illuminated if the 34Vdc is present 4 6 4 4 Con...

Страница 143: ...1 pin 15 24Vac is now present at the thermal switches AQ1 and AQ2 in the heat exchanger AQ1 will close when the coolant temperature reaches 32oC AQ2 will close when the coolant temperature reaches 38o...

Страница 144: ...s will be open This will leave K6 and K8 relaxed and their contacts in the position shown on the schematic for normal operation K6 is the Coolant Warning relay If the coolant level drops below the war...

Страница 145: ...nnected between X3 pin 6 and X4 pin 6 provides a low ground transmitter status signal that will only change if the relay physically pulls in activating the pump 4 6 4 4 9 Pump B Control and Status Whe...

Страница 146: ...4 46 888 2473 001 2 25 03 WARNING Disconnect primary power prior to servicing Section 4 Theory of Operation ATLAS Series...

Страница 147: ...MODULE REPAIR TO A MODULAR LEVEL CONSISTING OF PALLETS AND PC BOARDS ONLY HOT SURFACE THE ATLAS PA MODULES ARE DESIGNED TO HANDLE VERY HIGH TEMPERATURES AND MAY BE EXTREMELY HOT UP TO 90O F 50O C ABO...

Страница 148: ...gure 5 2 shows the module numbers and location Figure 5 1 PA Module ON OFF Controls STEP 2 Open the transmitter back door and put on the protective gloves provided The coolant valve provided can be tu...

Страница 149: ...olant hoses connected press the transmitter ON button to activate it Once the PA Module is ON and is working the phasing will need to be checked and possibly adjusted Since only one module has been ch...

Страница 150: ...er that To perform the Auto Bias of the PA Modules you will need to access the screen shown in Figure 5 3 The quickest way to get there is to press the Power Amp quick button to the right of the GUI t...

Страница 151: ...ch of the combiner reject loads are shown as A D readings or numbers from 0000 to 1023 with 0000 being ideal and 1023 being the worst case condition These numbers are shown below the bargraphs in Figu...

Страница 152: ...art STEP 4 Press the or phase adjust buttons to try to lower the reading and bargraph Tap for fine adjustment or press and hold the button for faster action Go back an forth between the 2 buttons unde...

Страница 153: ...Forward Power before combiner and filter b PA Cabinet Reflected Power before combiner and filter c Total System Forward Power after combiner and filter d Total System Reflected Power after combiner a...

Страница 154: ...E button to store the calibration setting 5 5 2 Reflected Power Calibration The forward power calibration should be done before the reflected power is calibrated since the forward sample is used to ca...

Страница 155: ...re 3 6 on page 3 8 This screen is used to calibrate the display readings To access this screen press the following buttons Calibration Procedure STEP 1 With the transmitter operating at nominal power...

Страница 156: ...d by accessing the Control Setup screen shown in Figure 5 7 Touch the white text box for the LCD Contrast and a pop up window will appear to allow the setting to be adjusted To get to this screen pres...

Страница 157: ...reen open the control panel and press and hold the Remote Enable and Disable buttons at the same time and momen tarily press the reset button on the Main Controller Keep the Enable and Dis able button...

Страница 158: ...he V XCAST exciter refer to the manual which came with the exciter 5 9 Main Controller Battery Check A 3V Lithium battery BT1 is fitted on the Main Controller PCB for the Real Time Clock See schematic...

Страница 159: ...ut Not communicating or not available d Yellow Warning A non critical sub system or parameter is out of tolerance and should be addressed by engineering personnel 1 Yellow with a 1 or bar Warning cond...

Страница 160: ...c Time and Date This gives the exact time and date that the fault occurred d Active or Inactive If the fault is highlighted in red it is still active and can not be cleared If the fault is not highli...

Страница 161: ...nt is 50 of nominal as measured in the DCU Drive Chain Switch to alternate exciter if available NO RFM1 DrvB RF Monitor 1 Drive B Trip point is 50 of nominal as measured in the DCU Drive Chain Switch...

Страница 162: ...RF and PS_MUTE and AC_LOW NO LVPS1 DC Dual LVPS System LVPS 1 DC output fault 15 15 or 7 5Vdc BUS_OK signal from low voltage power supply unit WARNING if LVPS2 is operational RF and PS_MUTE and AC_LO...

Страница 163: ...NO Coolant Temp Warning Coolant temperature has exceeded 55o C 55o C WARNING NO Coolant Temp Overload Coolant temperature has exceeded 70o C 70o C PS MUTE NO Coolant Flow Coolant flow is less than the...

Страница 164: ...o LDMOS failures when pallet current is less than 40 of the highest pallet current Module Shuts off NO M P G Drv Module 1 8 Phase and Gain input RF fault Input Overdrive RF input level is over 10mW WA...

Страница 165: ...utput Driver on Phase and Gain Board has exceeded 10A MODULE OFF YES M PreDrv OC Module 1 8 Pre Driver Over Current Pre Driver Current has exceeded 5A MODULE OFF YES M Drv1 OC Module 1 8 Driver 1 Over...

Страница 166: ...1 8 RF Output Over Drive Module RF output has exceeded 800W MODULE OFF YES M Heatsink OT Module 1 8 Heatsink Over Temperature Module heatsink below pre driver has exceeded 70oC MODULE OFF YES M SW Boa...

Страница 167: ...PWA PA MODULE CONTROLLER 992 7248 001 7 8 Table 7 16 PWA 376 MICRO MODULE 992 7203 001 7 9 Table 7 17 PWA DC DISTRIBUTION BOARD 992 7249 001 7 9 Table 7 18 PWA PREDRIVER PALLET 992 7251 001 7 9 Table...

Страница 168: ...U A4 SINGLE CAB DUAL EXCIT 0 0 EA SELECT QTY OF 1 FOR DUAL EXCITER XMTR 992 7258 004 DCU A4 SINGLE CAB SINGLE EXC 0 0 EA SELECT QTY OF 1 FOR SINGLE EXCITER XMTR 992 7268 001 LOW VOLTAGE P S OPTION 0 0...

Страница 169: ...E8 E9 E10 E11 E14 E15 E16 E19 638 0040 000 VOLTAGE TRANSDUCER ESD 3 0 EA U5 U6 U7 843 5549 071 SCH MOV AC SAMPLE 0 0 EA 843 5549 073 PWB MOV AC SAMPLE 1 0 EA Table 7 4 3 PHASE MOV PKG DELTA 917 2550...

Страница 170: ...gnators A 545 0309 118 RES 51 1 OHM 1 1 4W 1206 1 0 EA R1 620 3028 000 RECP MALE SMA PC MOUNT RT ANG 3 0 EA J1 J2 J3 843 5549 221 SCH DCU DIRECTIONAL COUPLER 0 0 EA 843 5549 223 PWB DCU DIRECTIONAL CO...

Страница 171: ...56 0208 000 CLAMP FLAT CABLE 2 12 0 EA 358 2598 000 CABLE TIE MOUNT 4 WAY 12 0 EA 358 3490 000 END STOP 264 TERM BLOCK 10 0 EA 2 TB2 2 TB3 2 TB4 2 TB5 2 TB6 358 3491 000 END PLATE 264 TERM BLOCK 5 0 E...

Страница 172: ...NG 115 230V 1 0 EA LVPS1 843 5550 024 WAVECRIMP MARKING CHART 0 0 EA 917 2550 002 CABLE MOD WC TO BACKPLANE 8 0 EA W10 W20 W30 W40 W50 W60 W70 W80 917 2550 003 CBL PKG 8 WAY COAX 1 0 EA 917 2550 004 C...

Страница 173: ...CABLES FWD PWR REFL PWR 1 0 EA 917 2550 029 DC INPUT PHASE GAIN 1 0 EA 917 2550 165 ASSY RF INPUT CABLE 1 0 EA 922 1300 020 ASSEMBLY THERMISTER 1 0 EA 922 1325 008 STANDOFF 6 0 EA 922 1325 009 SCREW...

Страница 174: ...5 RFC17 494 0488 000 CHOKE WIDE BAND 1 0 EA RFC16 620 0700 000 RECPT MALE SMB PC MOUNT 1 0 EA J3 620 3028 000 RECP MALE SMA PC MOUNT RT ANG 1 0 EA J2 700 1411 000 TERMINATION 50 OHM 10W 5 1 0 EA R17 9...

Страница 175: ...ES 200 OHM 1 0 1W 0805 1 0 EA R10 545 0308 301 RES 1K OHM 1 0 1W 0805 5 0 EA R4 R9 R12 R18 R21 545 0308 305 RES 1 5K OHM 1 0 1W 0805 1 0 EA R28 545 0308 306 RES 1 62K OHM 1 0 1W 0805 1 0 EA R11 545 03...

Страница 176: ...545 0310 201 RES 100 OHM 1 1W 2512 2 0 EA R8 R9 620 2883 000 JACK OSX STRAIGHT PCB MT 2 0 EA J9 J10 620 3182 000 JACK SMA STRAIGHT SMT 8 0 EA J1 J2 J3 J4 J5 J6 J7 J8 700 1409 000 TERMINATION 50 OHM 10...

Страница 177: ...SQ 2 0 EA J4 J5 610 1069 000 HEADER 9 PIN SINGLE ROW 1 0 EA J3 610 1107 000 HDR 12PIN 1ROW STRT POL 2 0 EA J8 J9 610 1145 000 HDR 6PIN 1ROW STRT POL 2 0 EA J6 J7 610 1367 000 HDR 16C 1ROW STRAIGHT 1 0...

Страница 178: ...7 000 LED LIGHT BAR GREEN ESD 1 0 EA DS11 384 0849 000 LED LIGHT BAR GREEN ESD 3 0 EA DS13 DS14 DS15 384 0858 000 LED LIGHT BAR YELLOW ESD 1 0 EA DS16 384 1153 000 LED LIGHT BAR YELLOW ESD 1 0 EA DS12...

Страница 179: ...RECP 4 MALE 1 0 EA W1 250 0550 019 STRAP 2 FEMALE LUG 5 16 2 0 EA W3 W4 250 0596 000 RECP 3 MALE W GND 600VRMS 1 0 EA W2 250 0604 000 STRAP FEMALE 6AWG WIRE 3 0 EA W5 W6 W7 448 1154 000 HANDLE 11MM X...

Страница 180: ...SINGLE ROW 1 0 EA J4 610 1107 000 HDR 12PIN 1ROW STRT POL 1 0 EA J7 610 1423 012 HDR 12C 1ROW VERTICAL 8 0 EA J11 J12 J13 J14 J15 J16 J17 J18 612 1184 000 SHUNT JUMPER 0 1 CENTERS 1 0 EA 1 JP1 612 122...

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