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Axcera Innovator LX Series Instruction Manual

Digital uhf driver/transmitter
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Instruction Manual
Innovator,
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Digital UHF
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AXCERA, LLC
103 FREEDOM DRIVE, P.O. Box 525 LAWRENCE, PA 15055-0525 USA
(724) 873-8100 • FAX (724) 873-8105
www.axcera.com • info@axcera.com

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  • Page 1 Instruction Manual Innovator, LX Series Digital UHF Driver/Transmitter AXCERA, LLC 103 FREEDOM DRIVE, P.O. Box 525 LAWRENCE, PA 15055-0525 USA (724) 873-8100 • FAX (724) 873-8105 www.axcera.com • info@axcera.com...

  • Page 2: Table Of Contents

    1.2: Assembly Designation Numbers .............1-1 1.3: Safety....................1-2 1.4: Contact Information ................ 1-2 1.5: Material Return Procedure ..............1-2 1.6: Limited One Year Warranty for Axcera Products........1-3 CHAPTER 2: SYSTEM DESCRIPTION & REMOTE CONTROL CONNECTIONS 2.0: System Overview ................2-1 2.1: Exciter Amplifier Chassis Assembly ............2-1 2.1.1: IF Processor Module ..............2-2...
  • Page 3 Digital UHF Driver/Transmitter Table of Contents TABLE OF CONTENTS - (Continued) SECTION PAGE 4.1.1.7: Amplitude and Phase Pre Correction Circuits ......4-4 4.1.1.8: Main IF Signal Path (Part 3 of 3)..........4-5 4.1.1.9: ALC Circuit ................4-5 4.1.1.10: Fault Command ...............4-6 4.1.1.11: ±12 VDC Needed to Operate the Board ......4-6 4.2: LO/Upconverter Module ................4-6 4.2.1: UHF Generator Board ..............4-7 4.2.2: UHF Filters .................4-8...
  • Page 4 Digital UHF Driver/Transmitter Table of Contents TABLE OF CONTENTS - (Continued) SECTION PAGE 5.5: Linearity Correction Adjustment.............5-4 5.6: Frequency Response Delay Equalization Adjustment ........5-5 APPENDICES APPENDIX A: TRANSMITTER SPECIFICATIONS APPENDIX B: DRAWINGS LISTS APPENDIX B: TRANSMITTER LOG SHEET LX Series, Rev. 1 April 29, 2008...
  • Page 5 Digital UHF Driver/Transmitter Table of Contents LIST OF FIGURES FIGURE PAGE 1-1: Brady Marker Identification Drawing..........1-1 2-1: Digital LX Series Front View Modules and Assemblies ......2-1 2-2: Rear View LX Series Driver/Amplifier Chassis Assembly ....2-11 3-1: 500 Watt Minimum Ventilation Configuration ........3-4 3-2: Tray Slide Cabinet Mounting Diagram ..........3-6 3-3:...
  • Page 6 Digital UHF Driver/Transmitter Table of Contents LIST OF TABLES TABLE PAGE 2-1: Digital LX Series Modules and Assemblies .........2-1 2-2: IF Processor Front Panel Switch ............2-3 2-3: IF Processor Front Panel Status Indicators ........2-3 2-4: IF Processor Front Panel Control Adjustments........2-3 2-5: IF Processor Front Panel Sample ............2-3 2-6:...

  • Page 7: Manual Overview

    Chapter 1: Introduction 1.1: Manual Overview 1.2: Assembly Designators This manual explains the installation, Axcera has assigned assembly numbers, setup, alignment, and maintenance Ax designations such as A1, where procedures for the LX Series modular x=1,2,3…etc, to all assemblies, modules, Digital UHF driver/transmitter.

  • Page 8: Safety

    Axcera technician with transmitter site for future reference. answers to the following questions. This Axcera provides two sets of manuals for will save time and help ensure the most this purpose; one set can be left at the direct resolution to the problem.

  • Page 9: Limited One Year Warranty For Axcera Products

    The RMA# is intended to be used when warranty, (b) the defective product is the unit is returned to Axcera. In properly packed and returned by the addition, all shipping material should be...
  • Page 10 Digital UHF Driver/Transmitter Chapter 1, Introduction F WARNING!!! × HIGH VOLTAGE Ø DO NOT ATTEMPT TO REPAIR OR TROUBLESHOOT THIS EQUIPMENT UNLESS FAMILIAR WITH OPERATION EXPERIENCED SERVICING HIGH VOLTAGE EQUIPMENT. LETHAL VOLTAGES ARE PRESENT WHEN POWER IS APPLIED TO THIS SYSTEM. IF POSSIBLE, TURN OFF POWER BEFORE MAKING ADJUSTMENTS TO THE SYSTEM.
  • Page 11 Digital UHF Driver/Transmitter Chapter 1, Introduction EMERGENCY FIRST AID INSTRUCTIONS Personnel engaged in the installation, operation, or maintenance of this equipment are urged to become familiar with the following rules both in theory and practice. It is the duty of all operating personnel to be prepared to give adequate Emergency First Aid and thereby prevent avoidable loss of life.
  • Page 12 Digital UHF Driver/Transmitter Chapter 1, Introduction dBm, dBw, dBmV, dBµV, & VOLTAGE EXPRESSED IN WATTS 50 Ohm System WATTS PREFIX dBmV dBµV VOLTAGE 1,000,000,000,000 1 TERAWATT +150 +120 100,000,000,000 100 GIGAWATTS +140 +110 10,000,000,000 10 GIGAWATTS +130 +100 1,000,000,000 1 GIGAWATT +120 + 99 100,000,000...
  • Page 13 Digital UHF Driver/Transmitter Chapter 1, Introduction USEFUL CONVERSION FACTORS TO CONVERT FROM MULTIPLY BY mile (US statute) kilometer (km) 1.609347 inch (in) millimeter (mm) 25.4 inch (in) centimeter (cm) 2.54 inch (in) meter (m) 0.0254 foot (ft) meter (m) 0.3048 yard (yd) meter (m) 0.9144...
  • Page 14 Digital UHF Driver/Transmitter Chapter 1, Introduction RETURN LOSS VS. VSWR 1.001 1.01 VSWR LX Series, Rev. 1...
  • Page 15 Digital UHF Driver/Transmitter Chapter 1, Introduction ABBREVIATIONS/ACRONYMS Alternating Current Frequency modulation Automatic Frequency Control FPGA Field Programmable Gate Array Automatic Level Control Hertz Amplitude modulation ICPM Incidental Carrier Phase Modulation Automatic Gain Control Input American wire gauge Intermediate Frequency Bit Error Rate Light emitting diode Bandwidth Lower Sideband...

  • Page 16: System Overview

    Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Chapter 2 System Description, Maintenance & Remote Control Connections Figure 2-1: Driver/Amplifier Front View Table 2-1: LX Series Modules and Assemblies ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME PART NUMBER Exciter Amplifier Chassis 1303228 (220 VAC) Assembly, LX Series Backplane Board...
  • Page 17 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.1 (A3) IF Processor Module module RF power level with the desired Assembly (1301938; Appendix A) level and uses the IF Power Control PWM line to correct for errors. In digital systems, a digital level control (DLC) voltage is generated on the IF Processor module and sent to an...

  • Page 18: If Processor Front Panel Switch

    Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Table 2-2: IF Processor Front Panel Switch SWITCH FUNCTION When Manual ALC is selected, the reference ALC voltage is set by the ALC Gain front panel potentiometer. MAN/AUTO ALC When Auto ALC is selected, the IF level control circuit will automatically increase the IF output until the desired output power is attained.
  • Page 19 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.2 (A5) LO/Upconverter Module voltage set by another front panel Assembly (1301930; Appendix A) potentiometer. When the Upconverter is set for manual gain, the RF output of the Upconverter is set by the front panel AGC potentiometer.

  • Page 20: Lo/Upconverter Front Panel Switch

    Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections signal. The frequency synthesizer IC uses a 10 MHz reference frequency for Example: signal conversion. Typically the IF input is a 0 dBm @ 44 MHz to the upconverter For a Frequency RF Out = 517.125 MHz, through the backplane board is applied N = 517125 kHz/5 kHz = 103425...
  • Page 21 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.3 (A4) Control/Power Supply Board (1302837) and a Switch Board Module Assembly, 220 VAC (1527-1406). The Assembly also (1303229; Appendix A) contains a switching power supply that provides ±12 VDC to the rest of the modules in the chassis and +32 VDC to the Power Amplifier module.
  • Page 22 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.4 (A6) Driver Amplifier Module Assembly (1303874; Appendix A) The RF power detector circuit outputs vary with operating frequency. These circuits must be calibrated at their intended operating frequency. Front panel adjustment potentiometers are used to calibrate the following: Power Amplifier Calibration Adjustments...
  • Page 23 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Table 2-13: Driver Amplifier Status Indicator FUNCTION ENABLED When lit Green, it indicates that the PA is in the Operate Mode. If a Mute (Green) occurs, the PA will remain Enabled, until the input signal is returned. DC OK When lit Green, it indicates that the fuse protected DC inputs to the PA (Green)

  • Page 24: Rf Output Assemblies

    Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.2 RF Output Assemblies the Control & Monitoring Module is enabled, the operate indicator on the The RF output from the exciter power front panel is lit and the DC OK on the amplifier is at the RF output jack, an “N”...
  • Page 25 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections operate mode where the +32 VDC Standby Mode section of the power supply is enabled but there is no RF output power from The standby mode in the transmitter the transmitter.

  • Page 26: Maintenance

    2.5 Maintenance the solvents will not damage components or the silk-screened markings on the The Innovator LX Series modules and boards. Water-based Driver/Transmitter is designed with cleaners can be used, but do not saturate components that require little or no the components.
  • Page 27 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Table 2-16: LX Series Chassis Assembly Hard Wired Remote Interface Connections to TB30 or TB31, 18 pos. Terminal Blocks Located on the Rear of the Assembly Signal Name Signal Type/Description Designations RMT Transmitter...
  • Page 28 Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Signal Name Signal Type/Description Designations RMT Spare 1 TB30-13 Remote connection to spare module - Use is TBD. RMT Spare 2 TB30-14 Remote connection to spare module - Use is TBD. Analog Input (0 to 1.00 V).

  • Page 29: Chapter 3: Site Considerations, Installation And Setup Procedures

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Chapter 3: Site Considerations, Installation and Setup Procedures Table 3-1: LX Series Digital Transmitters/Drivers AC Input and Current Requirements. Transmitter/ Voltage Current Driver 5 Watt 117/220 VAC 5 Amps 50 Watt 117/220 VAC 10 Amps...
  • Page 30 Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures the building. To achieve this, a few issues stream must be adequately filtered to need to be resolved. The first step is to ensure that no airborne particulates of determine the amount of heat to be any kind will be carried into the removed from the transmitter room.
  • Page 31 Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures recommended to keep the The inlet and outlet(s) must have transmitter from operating without automatic dampers that close any the necessary cooling. time the ventilation blower is off. The periodic cleaning of all filters In those cases in which is a must.

  • Page 32: Watt Minimum Ventilation Configuration

    Axcera can be contacted at (724) 873- locations, for each 5000 watts or 17,000 8100. BTUs. The exhaust must be at least four square feet at the exhaust screen for each 5000 watts or 17,000 BTUs.

  • Page 33: Unpacking The Chassis W/Modules

    Inform Axcera the coupler assembly; and output as to the extent of any damage as soon transmission line. The chassis or cabinet in as possible.

  • Page 34: Tray Slide Cabinet Mounting Diagram

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Figure 3-2: Tray Slides Cabinet Mounting Diagram Figure 3-3: Front and Rear View Reconnection Drawing Figure 3-4: Cabinet Front and Rear View Reconnection Drawing LX Series, Rev. 1...

  • Page 35: Ac Input

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures 3.4: AC Input each Power Amplifier Assembly, one for each power supply module. Once the chassis and output connections are in place, connect the This completes the unpacking and AC power cord from the chassis installation of the LX Series UHF assembly of the driver chassis...
  • Page 36 Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Figure 3-6: Rear View of the Digital Driver/Amplifier Chassis Assembly TB30 TB02 TB31 Table 3-2: Rear Chassis Connections for the LX Series Digital Exciter Driver. Port Type Function Impedance AC Input TB02 Term...

  • Page 37: 2: Initial Turn On

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures 3.5.2: Initial Turn On ALC FAULT: This illuminates RED when the needed ALC value to maintain the Once the transmitter has been installed output level is beyond the range of the and all connections have been made, the circuitry.

  • Page 38: 3: Front Panel Screens For The Driver/Amplifier Chassis Assembly

    Main Screen. The Model Number, Code Version Number and Firmware Number for your system are displayed on this screen. Make note of these two numbers when conferring with Axcera on software problems. Table 3-5: Menu 10 - Main Screen: This is the default main screen of the transmitter. When the transmitter is in operate, the 'STB' characters appear, allowing an operator to place the transmitter in STANDBY, by pushing the right most button located under to display.

  • Page 39: Menu 11 Error List Access Screen

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures transmitter is in standby the 'STB' characters are replaced with 'OPR' and the forward power values are displayed as OFF. An operator can change the transmitter from STANDBY to OPERATE by pressing the right most button on the front panel display. If the transmitter is in operate mode but off due to a modulation fault, the display reports the system power as Auto Off.

  • Page 40: Menu 20 Error List Display Screen

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-9: Menu 20 - Error List Display Screen This screen indicates System Errors 1/8, which is System Error 1 screen of 8 total System Errors that have occurred. Fault logging is stored in non-volatile memory. The transmitter's operating state can not be changed in this screen.

  • Page 41: Transmitter Device Parameters Detail Screens

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-12: Transmitter Device Parameters Detail Screens System Faulted Component Parameter Normal Choice (Blinking) INPUT SIGNAL STATE FAULT MODULATION FAULT INPUT IF MODULATOR IF Processor DLC CONTROL LOCK 0 - 5.00 V Details ALC LEVEL 0 - 5.00 V...

  • Page 42: Menu 40 Authorized Personnel Screen

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Menu 40 (Table 3-13) is entered by selecting ENT at Menu 13. Table 3-13: Menu 40 - Authorized Personnel Screen This screen of the transmitter notifies an operator that they are only to proceed if they are authorized to make changes to the transmitter's operation.

  • Page 43: Menu 40-2 Transmitter Set Up: Model Select Screen

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-15: Menu 40-2 - Transmitter Set-up: Model Select Screen This screen is used to specify which components are expected to be part of the system. By specifying the model number, the transmitter control firmware knows which components should be installed and it will be able to display faults for components that are not properly responding to system commands.
  • Page 44 Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-19: Menu 40-6 - Transmitter Set-up: System Reflected Power Calibration This screen is used to adjust the calibration of the system's reflected power. A calibration value symbol is also used for this screen as on the previous screens. Table 3-20: Menu 40-7 - Transmitter Set-up: Forward Power Fault Threshold Screen This screen is used to set the minimum forward power fault threshold.

  • Page 45: 4: Operational Procedure

    Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-23: Menu 40-12 - Transmitter Set-up: Inner Loop Gain Control This screen is used to set up the Inner Loop Gain of the exciter/amplifier assembly. This feature is implemented in transmitter software version 2.0 and above. (NOTE: Menu 40-11 is not used) Table 3-24: Menu 40-13 - Transmitter Set-up: Optional System Control This screen is used to set up any optional system, including the addition of the optional...
  • Page 46 Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures The power set-back values do not directly If a problem occurred during the setup correspond to the output power of the and operation procedures, refer to transmitter. Chapter 5, Detailed Alignment Procedures, of this manual for more This completes the Installation, Set Up information.

  • Page 47: Chapter 4: Circuit Descriptions

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions Chapter 4: Circuit Descriptions NOTE: Information and drawings on 4.1.1.1: DM8 Modulator Selected the DM8-R Digital Modulator Tray are found in the DM8-R Manual. With the modulator selected, J42C-14C low, this shuts off Q12 and causes Pin 8 4.1: (A3) IF Processor Module on the relays to go high that causes Assembly (1301938;...

  • Page 48: 4: Input Level Detector Circuit

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions matching pad consisting of R2, R3, and high is connected to the base of Q2 that R4 to the pin-diode attenuator circuit is forward biased and creates a current consisting of CR1, CR2, and CR3. path.

  • Page 49: 5: Pin Diode Attenuator Circuit

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions R69 and R137, and the red LED DS3, which can be measured at TP1, originates input loss indicator, which is illuminated. either from the ALC circuit when the When Q5 is on, it applies a high to the switch SW1 is in the ALC Auto position, gate of Q6.

  • Page 50: 7: Amplitude And Phase Pre Correction Circuits

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions it operate as a wide-band IF amplifier. The signal is next applied to amplifier The output of U1 connects to J40 that is U17 to compensate for the loss through jumpered to J41. The J40 jack is the L-pad.

  • Page 51: 8: Main If Signal Path (Part 3 Of 3)

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions The amplitude and phase pre-distorted IF 4.1.1.9: ALC Circuit signals are combined by Z2 and connected to J37 that is jumpered to J36 The other path of the corrected IF signal on the board. J37 can be used for at the input to the frequency response testing or monitoring purposes of the IF corrector circuit is used in the ALC circuit.

  • Page 52: 10: Fault Command

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions therefore increasing its gain maintaining and the LED section of opto-isolator U11. the same output power level. These actions turn on the transistor section of U11 that applies -12 VDC The ALC action starts with the ALC through CR21 to U10A pin 3, and pulls detector level monitored at TP4.
  • Page 53 Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions loop circuit. Any error from this 4.2.1 (A4) UHF Generator Board comparison is generated in the form of (1585-1265; Appendix A) an error current that is converted to a bias voltage that connects to the VCO. The UHF generator board is mounted in This voltage adjusts the output the UHF Generator Enclosure for EMI and...
  • Page 54 Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions eighth harmonic of the fundamental R14. R14 is variable and adjusted to set frequency (536 MHz to 1056 MHz). The the 0 dBm IF input level to the mixer. signal is amplified by U6 and U7 to a The IF in next filtered by L3, C84 and typical value of from +2 to +4 VDC as C83 and connected to pin 5, the I input...
  • Page 55 Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions RF decoupling components R24, C14, and AGC Manual Gain pot, accessed through L4. Inductor L4 is a broadband-RF choke the front panel. A switch AUTO/MAN and is resonance free through the UHF AGC is also located on the front panel. band.
  • Page 56 Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions balanced, dual feed output that is applied connected to J11 on the board. The to the push-pull Class A amplifier IC U1. jumper W3 on J10 must then be moved Capacitors C2 and C5 provide DC to pins 2 &...

  • Page 57: 1: Uhf Generator Board

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions MHz reference signal to pin 6 on U9 for 4.2.3.7 Comparator Phase Lock Loop use as the reference in the PLL circuits. Circuit 4.2.3.5 Internal 10-MHz Reference The selected 10-MHz reference connects Circuitry to pin 6, Oscillator In, of the IC U9.

  • Page 58: 9: Voltage Requirements

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions 3 goes low and is connected to DS1, the 4.3 (A4) Control Monitoring/Power Red Unlock LED, which does not lit. Q1 Supply Module, 220 VAC pin 3 low also connects to Q2 that is (1303229;...

  • Page 59: 1: Schematic

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions the two lines. VR1 connects from J4 to and 4. If this circuit is operational, the J2, VR2 connects from J4 to J3 and VR3 Green LED DS1, mounted on the board, connects from J2 to J3. will be lit +12 VDC Circuits PS2 protects the -12 VDC 2 Amp circuits...

  • Page 60: 2: Schematic

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions used for display of auto test results. A circuits are implemented using open test board is used to execute self test drain FETs, Q13, Q14, Q16, and Q17, routines. When the test board is with greater than 60 Volt drain to source installed, Auto_Test_1 is held low and voltage ratings.

  • Page 61: 4: Schematic

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions Table 4-1: Firmware Configuration Switch SW2 Operating Positions on Schematic Page 3. Firmware Configuration Switch SW2 (On System Controller code version 4.2 & Higher) SETTING No Modulator in translator SW2-1 Modulator present configuration Go Standby on RF System SW2-2 Only Mute on RF System Interlock Fault...

  • Page 62: Driver Amplifier Module Assembly

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions the transistor go toward ground 4.3.4: (A2) Switching Power Supply potential, reverse biasing the transistor. Assembly With the transistor reverse biased, no current through the transistor and LED, The power supply module contains a therefore the effected LED will not light.
  • Page 63 Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions 4.4.1: (A1) 1-Watt UHF Module in a 500 or 1kW system with an input Assembly (1302891; Appendix A) signal of +3 dBm at J1 of the assembly, an output of +20 dBm can be expected at J2. The 1-watt UHF module assembly provides radio frequency interference The UHF signal enters the board at J3, a...

  • Page 64: 5: Amplifier Control Board

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions 4.4.3: (A3) RF Amplifier Assembly dissipation loads, connect to the reject and (1300116; Appendix A) reflected ports, J5 and J4, of the coupler. The UHF Module Assembly, 250-watt 4.4.5: (A5) Amplifier Control Board module (Figure 4-1) is a broadband (1303682;...

  • Page 65: Schematic Page 2

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions PA4 of U4 is a processor operating LED current is available from each device but that monitors the +/-12 VDC. PA5 is again the controller will not need this much used to monitor the +12VDC supply to current.

  • Page 66: Schematic Page 3

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions resistors of this part but their actual Forward Average Power circuit. The resistance value is not closely defined. A detected level is connected to L4 that is part trimming resistor is suggested to give a of an intercarrier notch filter circuit that is temperature stability of –200 ppm/C, but tuned to eliminate the 4.5 MHz aural...

  • Page 67: Dual Peak Detector Board

    Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions 4.5: (A44) Dual Peak Detector Board board at the SMA jack J2. Resistors R3 and (1159965; Appendix A) R4 form an input impedance-matching network of 50Ω. The reflected power signal The function of the dual peak detector is detected by CR2, R26, R8, C3, and C8.

  • Page 68: Chapter 5: Detailed Alignment Procedures

    The replacement Note: Each Module has an assigned slot module can then be sent back to Axcera and will not fit properly or operate in the for repair. Contact Axcera Customer incorrect slot.

  • Page 69: 1: If Processor Module Assembly

    Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures connects through a cable to J6, the the ALC screen. Move the MAN/AUTO modulated IF Input jack, on the rear of ALC switch back to Auto, which is the the chassis assembly. The digital IF in normal operating position.

  • Page 70: Calibration Of Output & Reflected Power

    Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures stabilizes. Repeat if needed. Re-adjust With the AGC still in the manual mode the AGC ADJ pot as needed until the and the transmitter at full power, power level returns to the 100% output calibrate the Transmitter output metering power level.

  • Page 71: Linearity Correction Adjustment

    Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures adjust R10 on the dual peak detector board for a .2VDC, at TB30-13 and TB30- 12 return, on the terminal block TB30 mounted on the rear of exciter/driver chassis assembly. Next adjust the LED Switch the transmitter to Operate and display for 10% reading in the System adjust the front panel power pot for a...

  • Page 72: Linearity Correction Adjustment

    DM8-R This completes the detailed alignment Digital Modulator tray and a new file may procedures for the Digital LX Series need reloaded. Please call Axcera Field transmitter. Support for information on the loading of the linearity correction table into the If a problem occurred during the DM8-R Digital Modulator tray.
  • Page 73 APPENDIX A INNOVATOR LX SERIES SPECIFICATIONS...
  • Page 74 Configurations are available in power levels from 10 watts to 6 kilowatts analog and up to 3 kilowatts DTV, and all are manufactured in the USA by Axcera - The RF Experts.
  • Page 75 RF Load Impedance Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, Axcera reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our office.
  • Page 76 APPENDIX B DRAWINGS LIST...
  • Page 77 Digital UHF Driver/Transmitter Appendix A, Drawings and Parts Lists Innovator LX Series Digital System LX Series Driver Typical Block Diagram..........1302139 LU1000ATD, 1000W LX Series Digital Transmitter Typical Interconnect ..1303941 LX Series 50-1000 Watt Digital Transmitter Typical Racking Plan....1303596 Dual Peak Detector Board (Mounted in a Dual Peak Detector Assembly, 1092646) Schematic ..................
  • Page 78 Digital UHF Driver/Transmitter Appendix A, Drawings and Parts Lists Driver Power Amplifier Assembly Block Diagram ..................1305138 Interconnect ..................1305137 RF Module Pallet w/o Transistors, (Made into a RF Module Pallet, Philips, 1300116) Schematic ................51-5379-309-00 WSP Coupler Board Assembly Schematic ..................1303152 1 Watt UHF Amplifier Board (Mounted in a 1 Watt Module Assembly, 1302891) Schematic ..................
  • Page 79 APPENDIX C TRANSMITTER LOG SHEET...
  • Page 80 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER DATE READINGS TAKEN Model Number Code Version Firmware Number OUTPUT MEASUREMENTS % FORWARD POWER % REFLECTED POWER DM8 DIGITAL MODULATOR DETAILS MODE SOURCE LINEAR EQ NON-LINEAR EQ (Settings Customized per...
  • Page 81 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER INT. 10 MHz IF INPUT LEVEL SYSTEM CONTROL DETAILS Power Supply Enable For DRIVER AND PA DETAILS POWER SUPPLY STATE, 32V FORWARD POWER REFLECTED POWER AMP 1 CURRENT AMP 2 CURRENT...
  • Page 82 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER AMP SET 1 MODULE 4 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLECTED POWER AMP CURRENT 1 AMP CURRENT 2 AMP CURRENT 3 AMP TEMPERATURE CODE VERSION AMP SET 2 MODULE 1...
  • Page 83 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER AMP SET 2 MODULE 4 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLECTED POWER AMP CURRENT 1 AMP CURRENT 2 AMP CURRENT 3 AMP TEMPERATURE CODE VERSION AMP SET 3 MODULE 1...
  • Page 84 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER AMP SET 3 MODULE 4 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLECTED POWER AMP CURRENT 1 AMP CURRENT 2 AMP CURRENT 3 AMP TEMPERATURE CODE VERSION AMP SET 4 MODULE 1...
  • Page 85 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER AMP SET 4 MODULE 4 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLECTED POWER AMP CURRENT 1 AMP CURRENT 2 AMP CURRENT 3 AMP TEMPERATURE CODE VERSION AMP SET 5 MODULE 1...
  • Page 86 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER AMP SET 5 MODULE 4 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLECTED POWER AMP CURRENT 1 AMP CURRENT 2 AMP CURRENT 3 AMP TEMPERATURE CODE VERSION AMP SET 6 MODULE 1...
  • Page 87 UHF LX Series Digital Transmitter Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER AMP SET 6 MODULE 4 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLECTED POWER AMP CURRENT 1 AMP CURRENT 2 AMP CURRENT 3 AMP TEMPERATURE CODE VERSION NOTE: The previous Log Sheet readings can be taken from the System Details...

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