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Axcera Innovator CU10BT/CU0T-1, Инструкция по эксплуатации

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Innovator CU10BT-CU5000BT Analog Transmitter 

Board Descriptions 

 

Instruction Manual, Rev. 0 

52

 

(A6) Amplifier Assembly (1312566) – Used in the CU60BT and CU100BT 

 
The (A6) Amplifier Assembly (1312566) is made up of (A6-A1) the 2 Stage UHF 
Amplifier Board (1308784) and (A6-A2) the RF Module Pallet, High Output (1309580).  
The ALC Board (1308570) is also used with this assembly.  The assembly has 
approximately 36 dB of gain. 

 

(A6-A1) 2 Stage UHF Amplifier Board (1308784) 

 
The 2 Stage UHF Amplifier Board, (1308784) consists of a driver stage and a parallel 
connected final amplifier stage which have a total gain of approximately 23 dB.  The 
working point settings for the 2 Stage Amplifier Board are factory set using the 
potentiometers R32 for Q2, R15 for Q1, and R24 for Q3 and should not be altered.  The 
input RF connects to the first amplifier stage U2, which has a gain of approximately 14 
dB.  The output is split by U2 and connected to the final amps.  The final amplification 
circuit consists of parallel-connected push-pull LDMOS amplifier circuits Q1 and Q3 
operating in class AB each with approximately 14 dB of gain.  The board uses a power 
supply voltage of 28-32V.  The RF transistors are operated at a voltage of 24V 
generated by the voltage regulators U1 for Q1, U5 for Q3 and U6 for Q2, which provide 
a separate regulated voltage to each transistor.  In order to match the LDMOS 
impedance to the characteristic impedance of the input and output sides, matching 
networks are located before and after the amplifier circuits.  The hybrid coupler U2 splits 
the input to the parallel amplifiers and the hybrid coupler U4 combines the amplified 
outputs.  The combined output connects through a directional coupler to J1, the RF 
output jack of the board.  The directional coupler provides an RF sample at J3 that is 
used by an external overdrive protection circuit located on (A5) the ALC Board.  The RF 
output of the board is being used as a driver and has a level of 3W maximum 8-VSB.  At 
this power level the board draws approximately 1.8A total from the power supply. 
 

(A6-A2) RF Module Pallet, Philips, High Output (1309580) 

 
The RF Module Pallet, Philips, High Output, (1309580) is made from the RF 
Module Pallet, High Output w/o Transistors (1309579).  This broadband amplifier 
is for the frequency range of 470 to 860 MHz.  The amplifier is capable of 
delivering a maximum output power of 100 Watts peak, with an amplification 
factor of approximately 13 dB. 
 
The amplification circuit consists of push-pull amplifier blocks V1 and V2, 
connected in parallel, operating in class AB.  In order to match the impedance of 
the transistors to the characteristic impedance of the input and output sides, 
matching networks are placed ahead and behind the amplifier blocks. 
Transformers Z3 and Z4 at the input to V1 and V2 and Z5 and Z6 at the output 
of V1 and V2 serve to balance the input and output signals.  The paralleling 
circuit is achieved using the 3-dB input coupler Z1 and the second part of Z1, 
which is the 3-dB output coupler.  The working point settings of the amplifier 
circuits are factory implemented by means of the potentiometers R11 and R12 
and should not be altered.  The combined output of Z1 connects to the RF output 
jack of the board at J2.  The output of the amplifier assembly at J2 connects to J1 
on (A7) the output detector board. 

 
 
 
 

Содержание Innovator CU10BT/CU0T-1

Страница 1: ...n Manual Innovator CU10BT CU0T 1 to CU5000BT CU4T UHF Analog Transmitter Axcera LLC 103 Freedom Drive P O Box 525 Lawrence PA 15055 0525 USA Phone 1 724 873 8100 Fax 1 724 873 8105 www axcera com info axcera com ...

Страница 2: ...ion from unauthorized disclosure use or duplication Any disclosure use or duplication of this document or any of the information herein for other than the specific purpose for which it was disclosed by Axcera is expressly prohibited except as Axcera may otherwise agree in writing Recipient by accepting this document agrees to the above stated conditional use of this document and this information d...

Страница 3: ...r Board System M N 1312264 43 A3 IF Pre Corrector Board 1308796 44 Pin Diode Attenuator Circuit 44 In Phase and Quadrature Corrector Circuits 45 Frequency Response Corrector Circuit 46 ALC Circuit 46 Input Fault and Modulation Fault Circuitry 47 12 VDC 6 8 VDC and VREF needed to operate the Board 47 A4 Frequency Agile Upconverter Board 1309695 48 A5 ALC Board Innovator CX Series 1308570 49 A6 Ampl...

Страница 4: ...ital 2000 Watt Analog Amplifier Drawers 57 A7 Amplifier Control Board 1312260 57 A10 Current Metering Board 1309130 58 A5 4 Way Splitter Board 1312371 58 A1 A4 878 Amplifier Pallets 1314098 58 A6 4 Way Combiner Board 1312368 58 A8 A9 500W 1kW and 1kW 2kW Amplifier Drawer Power Supplies 58 System Set Up Procedure 61 Set Up of the LO1 and LO2 Samples on Upconverter Board 61 ALC Board Set Up Forward ...

Страница 5: ...between the boards within a drawer or assembly and that connect between the drawers racks and cabinets are labeled using markers Figure 1 1 is an example of a marked cable There may be as few as two or as many as four Markers on any one cable These markers are read starting farthest from the connector If there are four Markers the marker farthest from the connector is the system number such as sys...

Страница 6: ...quipment before cleaning Do not use liquid or aerosol cleaners Use only a damp cloth for cleaning Ventilation Openings in the cabinet and module front panels are provided for ventilation To ensure the reliable operation of the system and to protect the unit from overheating these openings must not be blocked Servicing Do not attempt to service this product yourself until becoming familiar with the...

Страница 7: ...n item to Axcera please include the RMA on the packing list and on the shipping container The packing slip should also include contact information and a brief description of why the unit is being returned Please forward all RMA items to AXCERA LLC 103 Freedom Drive P O Box 525 Lawrence PA 15055 0525 USA For more information concerning this procedure call the Axcera Field Service Department at 1 72...

Страница 8: ...by Axcera but not bearing its trade name shall bear no warranties other than the special hours of use or other warranties extended by or enforceable against the manufacturer at the time of delivery to the buyer NO WARRANTIES WHETHER STATUTORY EXPRESSED OR IMPLIED AND NO WARRANTIES OF MERCHANTABILITY FITNESS FOR ANY PARTICULAR PURPOSE OR FREEDOM FROM INFRINGEMENT OR THE LIKE OTHER THAN AS SPECIFIED...

Страница 9: ...O THE SYSTEM RADIO FREQUENCY RADIATION HAZARD MICROWAVE RF AMPLIFIERS AND TUBES GENERATE HAZARDOUS RF RADIATION THAT CAN CAUSE SEVERE INJURY INCLUDING CATARACTS WHICH CAN RESULT IN BLINDNESS SOME CARDIAC PACEMAKERS MAY BE AFFECTED BY THE RF ENERGY EMITTED BY RF AND MICROWAVE AMPLIFIERS NEVER OPERATE THE TRANSMITTER SYSTEM WITHOUT A PROPERLY MATCHED RF ENERGY ABSORBING LOAD OR THE ANTENNA ATTACHED ...

Страница 10: ...eck with one hand and push down on his forehead with the other This opens the airway Sometimes doing this will let the person breathe again by himself 3 If he is still not breathing begin rescue breathing Keep his head tilted backward Pinch nose shut Put your mouth tightly over his mouth Blow into his mouth once every five seconds DO NOT STOP rescue breathing until help arrives LOOSEN CLOTHING KEE...

Страница 11: ...1 MEGAWATT 90 60 100 000 100 KILOWATTS 80 50 10 000 10 KILOWATTS 70 40 1 000 1 KILOWATT 60 30 100 1 HECTROWATT 50 20 50 47 17 20 43 13 10 1 DECAWATT 40 10 1 1 WATT 30 0 77 137 7 07V 0 1 1 DECIWATT 20 10 67 127 2 24V 0 01 1 CENTIWATT 10 20 57 117 0 707V 0 001 1 MILLIWATT 0 30 47 107 224mV 0 0001 100 MICROWATTS 10 40 0 00001 10 MICROWATTS 20 50 0 000001 1 MICROWATT 30 60 0 0000001 100 NANOWATTS 40 7...

Страница 12: ...als 0 8327 Canadian gallon fluid ounce fl oz milliliters ml 29 57353 British Thermal Unit watt W 0 2930711 per hour Btu hr horsepower hp watt W 746 NOMENCLATURE OF FREQUENCY BANDS FREQUENCY RANGE DESIGNATION 3 to 30 kHz VLF Very Low Frequency 30 to 300 kHz LF Low Frequency 300 to 3000 kHz MF Medium Frequency 3 to 30 MHz HF High Frequency 30 to 300 MHz VHF Very High Frequency 300 to 3000 MHz UHF Ul...

Страница 13: ...Innovator CU10BT CU5000BT Analog Transmitter Introduction Technical Manual Rev 0 9 RETURN LOSS VS VSWR 1 001 1 01 1 1 2 0 VSWR 0 10 20 30 40 50 60 70 R E T U R N L O S S dB ...

Страница 14: ...Transmitter DC Direct Current D A Digital to Analog DSP Digital Signal Processing DTV Digital Television dB Decibel dBm Decibel referenced to 1 milliwatt dBmV Decibel referenced to 1 millivolt dBw Decibel referenced to 1 watt FEC Forward Error Correction FM Frequency Modulation FPGA Field Programmable Gate Array Hz Hertz ICPM Incidental Carrier Phase Modulation I P Input IF Intermediate Frequency ...

Страница 15: ...s The IF output of the modulator board connects to J2 on the IF pre corrector board 1308796 The IF Pre Corrector Board provides ALC automatic or manual gain control of the IF level The board also supplies pre correction Response In Phase and Quadrature Non Linear adjustments The board has the circuitry for ALC Fault Input Fault and Modulation Fault monitoring and indications The IF is connected to...

Страница 16: ...B gain The amplified outputs of the pallets are combined in the 4 Way combiner board whose output is at J1 The RF is connected to J2 the 7 16 1 1cm Din RF output jack located on the rear panel of the Drawer The 4 way combiner board supplies a forward and a reflected power sample to the amplifier control board for metering and monitoring purposes In a CU1000 the typical sample value at J6 a 50Ω BNC...

Страница 17: ... to be installed immediately return all items to their original packaging for safe storage Save all packing material for future use If equipment is ever removed from the site the original packaging will ensure its safe transport Figure 1 CU2000BT Front View Typical Racking Plan Installation The Innovator CXB Series transmitters are designed for simple installation Expensive test equipment is not r...

Страница 18: ...efer to vendor supplied information included with your low pass filter for specific dimensions Make sure that the space provided for the CX Series equipment is sufficient and includes the splitters combiners and external filters Check that any additional equipment which is included in the system that extends above or to the side of the mounting rack has sufficient clearance space Refer to the cust...

Страница 19: ...net an AC distribution panel is used to connect the AC to the individual Drawers The AC distribution panel is mounted facing the rear of the cabinet and accessed through the back of the cabinet The main AC input for a CU2000BT transmitter is 195 235VAC at least 30Amps 50 60Hz The customer should provide a single point breaker or disconnect for the main AC input that connects to the transmitter The...

Страница 20: ...put connections to the system are made to the jacks mounted on the rear panels of the CU10 thru CU200 systems the drivers for the CU500 and high power systems and to the 500 Watt and 1000 Watt amplifier Drawers The CU10 thru CU200 systems and the drivers for the CU500 and higher power systems accept baseband audio and video inputs and output a RF ON Channel signal Refer to Figure 3 and to Table 2 ...

Страница 21: ... the Composite Audio Input to the BNC Input B jack J2 or the Balanced Audio Input to the terminal connections on TB1 to terminal 1 to terminal 2 and ground to terminal 3 Connect the external 10 MHz reference input to the 50Ω BNC 10 MHz input jack J6 located on the rear panel of the CU100BT The analog RF ON Channel output of the CU100BT is at J9 the 50Ω N connector RF output jack The output of the ...

Страница 22: ...It is recommended that periodically the time interval depends on the amount of movement the cabinet receives all mounting hardware holding drawer slides shelving and mounting plates inside the cabinet are checked for tightness All screws and bolts that are accessible should be tightened initially when the transmitter is received and periodically thereafter if the transmitter is moved by vehicle Al...

Страница 23: ...ccurring now The Status LED showing Amber indicates that a Fault occurred since the last time the Fault indications were reset If your system is CU500 or higher power the Enable LED and Status LEDs on the 500 or 1000 Watt Amplifier Drawer should be Green indicating the system is in Operate and performing normally The Enable LED showing Amber indicates the System is in Standby The Status LED should...

Страница 24: ...ply Voltage 30 VDC Heatsink Temperature 20º to 30º F 15º to 20º C above ambient temperature Pin Attenuator Voltage 1 Volt to 5 Volts Typical Operating Parameters for a CU200 Parameter Typical Reading Forward Power 100 Reflected Power 5 Power Supply Voltage 40 VDC Heatsink Temperature 20º to 30º F 15º to 20º C above ambient temperature Pin Attenuator Voltage 1 Volt to 5 Volts Typical Operating Para...

Страница 25: ...isplay are Off Power supply A9 not operating NOTE A spare 10 Amp fuse is provided in the blank fuse holder under the active fuse If there is a fault occurring in the system the Status LED on the front panel will flash RED as long as the fault is present In addition the menu will jump to the current fault on the display and blink this fault continuously if the Jump to Fault screen is set to Yes Whe...

Страница 26: ... Right Arrow Used to exit from main menus and submenus of the main menu when they are present Table 6 Innovator CXB Series Operate Standby and Status Indicators LED FUNCTION OPERATE STANDBY Green Amber A Green LED indicates that the system is in Operate An Amber LED indicates that the system is in Standby STATUS Green Red Amber A Green LED indicates that the system is functioning normally A flashi...

Страница 27: ...0 higher power The remote connections for the Innovator CXB Series system are made to the Remote 15 Pos Female D connector Jack J12 located on the rear panel of the Drawer Table 7 Remote Connections to J12 15 Pos Female D Connector for CXB Series system Signal Name Pin Designations Signal Type Description RMT System Operate J12 1 Discrete Open Collector Input A pull down to ground on this line ind...

Страница 28: ...J12 10 Analog Output 0 to 4 0 V This is a buffered loop through of the calibrated System Aural Power Indicates the System Aural power Scale factor is 100 2 0V Metering RMT System Reflected Power Level J12 11 Analog Output 0 to 4 0 V This is a buffered loop through of the calibrated System Reflected Power Indicates the System Reflected power Scale factor is 25 2 0V Metering RMT Input Status J12 12 ...

Страница 29: ...Version Numbers of the software used in the system The example shown is Firmware number 1312423 Version number 6 1 2 7 The final screen is the RF Power default screen which indicates the Forward Power and Reflected Power for the system The following screens are scrolled through using the buttons to the right of the display Pushing and releasing the Up Down Arrows will scroll you through the Main M...

Страница 30: ...n Menu Push and release the UP or DOWN arrows to browse the main menus The following screens are typical of an operating system The values indicated on the screens in your system may vary from these Operation Screens NOTE The following Operation screens provide operating information only No adjustments are available using these screens Table 8 Transmitter RF Power Screen This is the default screen...

Страница 31: ...ndicates the temperature of the amplifier heatsink assembly mounted in the system or driver Drawer in degrees Centigrade If the temperature is below the trip point it will indicate OK Typically 15º to 20º C above ambient temperature Table 10 1 3 Power Supply Voltage Details Screen This screen shows the power supply voltage in the system or driver Drawer If the power supply voltage is below the tri...

Страница 32: ...s Screen This is the System Device Details IF Processor Main Sub Screen Push the ENTER button to access the Device IF Processor submenus or push the DOWN Arrow to view the next main menu which is the Device Details Upconverter Main Sub Menu Table 10 2 1 IF Processor Input Details Screen This menu indicates if there is an input signal to the IF Processor Table 10 2 2 IF Processor Modulation Present...

Страница 33: ...tes the channel and frequency that the upconverter is currently set Pushing the Left Arrow will display the System Device Details Upconverter Values Main Sub Screen and then pushing the Down arrow will access the System Device Details External Amplifier Main Sub Screen Table 10 4 External Amplifier Device Details Screen This is the Transmitter Device Details External Amplifier Main Sub Screen This...

Страница 34: ...er 1 NOTE See the final test data sheet for the typical current value Table 10 4 6 External Amplifier 1 I4 B2 Current Details Screen Indicates Current of the B2 device in the external amplifier 1 NOTE See the final test data sheet for the typical current value Table 10 4 7 External Amplifier 1 A Power Supply Details Screen Indicates the voltage of the A power supply in the external amplifier 1 NOT...

Страница 35: ...to the system s operation Changes made within the following set up screens can affect the system s output power level output frequency and the general behavior of the system Please do not make changes within the system s set up screens unless you are familiar with the operation of the system Pressing the ENTER button will display the Enter Key Sets to Change screen Table 11B Right Key Sets to Chan...

Страница 36: ...m is corrected the fault will still register Since latched faults are used to set the status LED color when fault latching is OFF the status LED should only be green if there are no faults or red if there are one or more active faults When fault latching is ON the status LED will be amber if there are no current faults but a fault was previously detected and is now a latched fault A blinking amber...

Страница 37: ...e user to set the Minimum Forward Output Power level that the Transmitter will operate before the transmitter will report a faulted condition NOTE If the transmitter system contains a back up exciter this screen can be used to set the level at which the back up exciter will be activated Table 11 1 10 Chassis Values number of Amplifiers in System Screen This screen sets up the number of amplifiers ...

Страница 38: ...t Up Screens 1 2 3 4 These screens set up the System as Manual switching to Analog or Digital operation or Jumper switching to Analog or Digital operation The operator selects which method will be used for the switching from the above setup screens or from the Web interface The decision on which method manual or jumper to use for mode selection generally is determined by the remote control method ...

Страница 39: ... one channel to another The SETUP 1 or SETUP 2 selection is controlled by a Low ground for SETUP 2 or a High open for SETUP 1 at J12 7 on the Remote Interface Jack J12 located on the rear panel of the Exciter Driver Drawer Changes should only be made while the transmitter is in standby Contact Axcera Field Service before using this menu With a Channel or Custom Frequency screen displayed the Chann...

Страница 40: ...pconverter output When exiting the set up menus a prompt will inform you that the Enter Key must be pushed to accept the changes that were made Table 11 4 3 Upconverter IF Frequency Selection Screen The transmit channel IF Frequency should not be changed unless the transmitter is being converted from one digital IF Frequency to another The IF Frequency can be changed to 36 MHz or 44 MHz by pushing...

Страница 41: ...e IP address of the Innovator CXB Ethernet Controller as a URL in the browser of the remote computer A login screen will be displayed prompting for a user name and password which are case sensitive The controller has two levels of user access Administrative and Read Only Administrators have full access to transmitter controls and controller configuration Read Only users can view all transmitter pa...

Страница 42: ...rnet Main Control Monitoring Screen Color Key Green Okay or Normal Operation Yellow Warning But Not faulted Red Currently Active Fault Orange Old or Previously Latched Fault If an item on screen is Orange a latched fault is present Activating the Fault Reset button will reset any latched faults clears the transmitter s event log and causes the parameter to display normally The date and time of the...

Страница 43: ...events from the transmitter s System Controller and the Ethernet Controller is scheduled so that device details are continuously monitored Therefore the event log screen may update a few seconds behind the transmitter display when the log is full or changing quickly Each event record indicates the event number the number of events an occurrence counter and text describing the event The occurrence ...

Страница 44: ... system did not have SNMP enabled then fields would not be populated and the Send Test Trap button would not be present New event log entries including an activated test trap are automatically forwarded to SNMP agents specified to receive trap messages Trap messages do not need to be acknowledged by an agent The ability to reset a demodulator is only present in transmitters that have this hardware...

Страница 45: ...ser to reset the first account User Name and Password The Yes or No selection can be changed by pushing the Up or Down Button After the selection has been made the user needs to depress the right or left arrow and then the display will ask PUSH ENTER TO ACCEPT CHANGES If the ENTER button is depressed the change will be accepted If any other button is depressed the change will not be made If Yes is...

Страница 46: ...ject identifiers OID Each OID identifies a variable that can be read read and set or only set via SNMP commands SNMP functionality also provides for alert messages that are issued from the Ethernet Controller to one or two network computers A SNMP trap message is sent only once and is not acknowledged by the receiving device The Ethernet Controller issues a trap message when data is added to the t...

Страница 47: ...n 1 the L input of the Z1 mixer The modulated Visual IF output of the Z1 mixer connects to a Saw filter FL1 and FL2 if present The Aural IF oscillator U3 is a VCO operating below the visual carrier at 41 25 MHz If either of these oscillators unlock a signal is sent to the control system to mute the RF output The audio circuitry can be configured to use either a 600 Ohm balanced input or a 75 ohm b...

Страница 48: ...ttenuator circuit that consists of CR1 CR2 CR3 Each of the pin diodes contains a wide intrinsic region this makes the diodes function as voltage variable resistors at this intermediate frequency The value of the resistance is controlled by the DC bias supplied to the diode The pin diodes are configured in a pi type attenuator configuration where CR1 is the first shunt element CR3 is the series ele...

Страница 49: ... R67 is buffered by the unity gain amplifier U5A This reference voltage is then applied to R68 R71 and C33 through L11 to the CR9 diode C33 keeps the reference from sagging during the vertical interval The 9 VDC reference voltage is applied to the unity gain amplifier U5B The reference voltage is then connected to diode CR11 through choke L12 The two chokes L11 and L12 form a high impedance for IF...

Страница 50: ...setting of R40 the ALC Adjust pot The output of U3B connects through S1 pins 2 to 3 if it is in the ALC position to the pin diode attenuator circuit CR1 CR2 CR3 The high forward biases them more or less that increases or decreases the IF level therefore the output level When the input signal level increases the forward bias on the pin attenuator decreases therefore the output power decreases that ...

Страница 51: ...and connects a low to J7 1 Input Loss which is wired to the Control Board for control and monitoring The Video Input Level at TP3 is also fed to a modulation loss circuit consisting of the IC U4B U12B and associated component When the input signal level to the U4B falls below the reference set by R62 and R60 which acts as a loss of Modulation Detector the output of U4B goes high which is split One...

Страница 52: ...ersion products above 1 GHz amplified by U21 passed to another low pass filter that removes unwanted conversion products above 1 GHz amplified by U20 and connected to J7 the RF output jack for the board 3dBm level The upconverter has two local oscillators LO1 and LO2 The LO1 oscillator consists of U1 U2 U5 U6 and amplifiers U3 and U4 The LO1 oscillator operates at 1 GHz for 44 MHz IF inputs and is...

Страница 53: ... example for an Analog transmitter operating with System M N the IF center Frequency is 44 MHz therefore LO1 1GHz If the transmitter is operating on channel 14 at a center frequency of 473 MHz LO2 1044 473 1517 MHz The Channel Center Frequency and IF Frequency on which the transmitter is operating are displayed on the front panel LCD Display under the Upconverter Sub menu of the Device Details men...

Страница 54: ...aults that can override this These faults are Input Fault VSWR Cutback Fault VSWR Shutdown Fault and Overdrive Fault The Input Fault is generated by comparator U7C and presets the PIN attenuator and ALC circuit to maximum attenuation whenever the input signal drops below about 7 dBm Test point TP2 allows the user to measure the detected input voltage The VSWR cutback circuit is set so that the ALC...

Страница 55: ...cation circuit consists of parallel connected push pull LDMOS amplifier circuits Q1 and Q3 operating in class AB each with approximately 14 dB of gain The board uses a power supply voltage of 24V The RF transistors are operated at a voltage of 24V generated by the voltage regulators U6 and U7 for Q2 U5 and U3 for Q3 and U1 and U3 for Q1 which provide a separate regulated voltage to each transistor...

Страница 56: ...e parallel amplifiers and the hybrid coupler U4 combines the amplified outputs The combined output connects through a directional coupler to J1 the RF output jack of the board The directional coupler provides an RF sample at J3 that is used by an external overdrive protection circuit located on A5 the ALC Board The RF output of the board is being used as a driver and has a level of 3W maximum 8 VS...

Страница 57: ...DVB but is typically used in a driver application at much lower output powers The Directional Coupler U1 provides a 20 dB down sample of the RF output A6 A3 Dual 878 Pallet Assembly 1310138 This board is a UHF LDMOS power amplifier consisting of two power transistors operating in parallel The board operates on a power supply voltage of 42 VDC The voltage regulator U1 steps down the voltage to prov...

Страница 58: ... supply voltage of 42VDC The voltage regulator U1 steps down the voltage to provide a bias voltage to each pair of transistors The diodes CR1 and CR3 are used to temperature compensate the bias voltage that is applied to the Q1 and Q2 RF transistor pairs As the transistor pairs heat up the diodes also heat up causing the voltage across them to drop lowering the bias voltage to the RF transistors s...

Страница 59: ...t Rather it is layered on top of U7 and is the EPLD s interface to the outside world Information is passed between the microcontroller and the EPLD The microcontroller communicates information to and from the front panel and sends the EPLD the information it needs to decide whether or not to allow the system to turn on The front panel viewable LEDs DS3 for Operate Standby and DS4 for Status indica...

Страница 60: ...uts of the A9 power supply connects to the terminal block TB2 that distributes the DC to the boards in the Drawer Some of the 5VDC and 12VDC outputs connect directly to the Demodulator and Modulator boards while the other outputs connect through the CU Control Board to the IF Precorrector the Upconverter the ALC the Amplifier Assembly and the Output Detector Boards The 24 28 30 39VDC outputs of th...

Страница 61: ...and monitoring 12 VDC enters the board at J9 1 from the exciter driver Drawer and is connected through a filter and isolation circuit consisting of C31 C14 and L5 before it is connected to the regulator IC U5 U5 supplies the 5 VDC needed for operation of the ICs on the board The 5 VDC is connected through a filter circuit consisting of C15 C19 and C21 before it is connected to the rest of the boar...

Страница 62: ...sing resistors which supplies the voltage values to the U1 current sense amplifier IC R11 is a gain adjust which is adjusted to eliminate any rSense Error and to place the OpAmp output at 2 61V for 40Amps sense as measured at TP3 The current sense output at J1 1 connects to the A7 control board for metering purposes A5 4 Way Splitter Board 1312371 The 4 way splitter board takes the RF Input at J1 ...

Страница 63: ...uced when AC is connected to the Drawer and the CB1 and or the CB2 circuit breakers are turned On Either or both power supplies provides the 5VDC for use by the control board The 42VDC needed by the amplifier modules on the heatsink assembly is generated by the A8 A9 power supplies The power supplies will operate when AC is connected to the Drawer the CB1 circuit breaker for the A8 power supply an...

Страница 64: ...Innovator CU10BT CU5000BT Analog Transmitter Board Descriptions Instruction Manual Rev 0 60 This page has intentionally been left blank ...

Страница 65: ...1 724 873 8100 or fax to 1 724 873 8105 before sending in any board or module Figure 11 A4 Upconverter Board 1309695 Set Up of the LO1 and LO2 Samples on Upconverter Board The following procedure should only be attempted if the Internal 10 MHz Reference is used and the output carrier frequency is off On the A4 Upconverter Board 1309695 Refer to Figure 11 There are two Sample Jacks J1 for LO1 1GHz ...

Страница 66: ...Detector Board 1314725 Refer to Figure 12 Turn the output power down to 10 power with R62 on the ALC Board Remove the output RF connector from J2 on transmitter and calibrate the reflected power to 10 using R7 the Reflected Calibration pot on the Output Detector Board Refer to Figure 13 Re connect the RF output connector to the transmitter and increase the power in Manual gain using R62 on the ALC...

Страница 67: ...orrect Sync Clip R145 on the analog modulator board controls a limiter which prevents negative going transients on the video input from overdriving the transmitter To adjust this limiter monitor the demodulated video from the transmitter and adjust R145 clockwise so that it just begins to reduce the sync amplitude Turn it slightly counter clockwise so that it is just at the point where it is about...

Страница 68: ...network all together The jumper W4 on J3 switches the audio gain between a setting of low and high It would normally be set to low gain where it is connected between pins 2 and 3 of J3 If the audio level into the tray is too low to attain the proper deviation level the jumper can be switched to between pins 1 and 2 of J3 but this should only be done if the audio gain setting of R36 does not allow ...

Страница 69: ...old and magnitude adjustment The threshold controls the point that the precorrection cuts in and the magnitude controls how much the gain increases once the threshold is reached The quadrature precorrection has three stages two similar to the in phase precorrection The third stage is a bit different as it can either boost the signal beyond the threshold or compress the signal beyond a certain thre...

Страница 70: ...Innovator CU10BT CU5000BT Analog Transmitter System Set Up Procedure Instruction Manual Rev 0 66 This page intentionally left blank ...

Страница 71: ...APPENDIX A Innovator CU10BT CU0T 1 to CU5000BT CU4T Analog UHF Transmitter System Drawings and Parts Lists ...

Страница 72: ......

Страница 73: ... CU3400BT CU3T AVSYS Peru Cabinet Parts List CB005759 CU3400BT CU3T AVSYS Peru Transmitter Parts List CB005760 CU100BT Innovator 100 Watt Analog Transmitter Used as a driver CU100BT Block Diagram 1315608 CU100BT Interconnect 1314617 CU100BT Assembly Drawing 1314622 CU100BT Parts List 1314622 CU500B 500 Watt Digital 1000 Watt Analog Amplifier Drawer CU500B 1000 Watt Analog Amplifier Drawer Block Di...

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