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Axcera Innovator LX Series Instruction Manual

Uhf analog driver / transmitter / translator
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INSTRUCTION MANUAL
Innovator,
LX Series
UHF Analog
Driver/Transmitter/Translator
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 UHF Analog Driver/Transmitter/Translator 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 Designators ..............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, MAINTENANCE & REMOTE CONTROL CONNECTIONS System Overview ................2-1 2.0 (Optional) Exciter Switcher Tray............
  • Page 3 UHF Analog Driver/Transmitter/Translator Table of Contents TABLE OF CONTENTS - (Continued) SECTION PAGE 4.0.1 Exciter Switcher Control Board ..........4-1 4.1 (Optional) Receiver Module (not used in a transmitter system) ....4-1 4.1.1 IF ALC Board ................. 4-1 4.1.2 UHF or VHF Mixer/PLL Board ............. 4-2 4.1.3 UHF, VHF LB or VHF HB Preamplifier Board........
  • Page 4 UHF Analog Driver/Transmitter/Translator Table of Contents TABLE OF CONTENTS - (Continued) SECTION PAGE 4.6 Exciter PA Module used in 10-100Watt Xmitters. or Drivers above 2kW ..4-20 4.6.1 1 Watt Amplifier Module Assembly ..........4-20 4.6.2 1 Watt UHF Amplifier Board .............4-20 4.6.3 40 Watt UHF Amplifier Assembly..........4-21 4.6.4 UHF Module Assembly, RF Module Pallet........4-22 4.6.5 Coupler Board Assembly ............4-22...
  • Page 5 UHF Analog Driver/Transmitter/Translator Table of Contents LIST OF FIGURES FIGURE PAGE Brady Marker Identification Drawing ..........1-1 Exciter/Driver Chassis Assembly Front View........2-1 Exciter/Driver Chassis Assembly Rear View ........2-18 1 kW Minimum Ventilation Configuration ........3-4 Front and Rear View Reconnection Drawings ........3-5 Ac Input Box Assembly ..............
  • Page 6 UHF Analog Driver/Transmitter/Translator Table of Contents LIST OF TABLES TABLE PAGE LX Series Trays and Assemblies........... 2-1 Receiver Front Panel Switch............2-3 Receiver Front Panel Status Indicators .......... 2-3 Receiver Front Panel Control Adjustments ........2-3 Receiver Front Panel Samples ............. 2-3 Modulator Front Panel Switch............
  • Page 7 UHF Analog Driver/Transmitter/Translator Table of Contents LIST OF TABLES – (Continued) TABLE PAGE 3-20 Menu 20 Error List Display Screen..........3-14 3-21 Menu 30 Transmitter Device Details Screen .........3-15 3-22 Menu 30-1 System Details Screens ..........3-15 3-23 Transmitter Device Parameters Detail Screens ......3-15 3-24 Menu 40 Authorized Personnel Screen ........3-16 3-25...

  • Page 8: Manual Overview

    This manual explains the installation, and boards in the system. These setup, alignment, and maintenance designations are referenced in the text of procedures for the Innovator LX Series this manual and shown on the block UHF analog modular driver/transmitter/ diagrams and interconnect drawings translator.

  • Page 9: 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 10: 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 11 UHF Analog Driver/Transmitter/Translator 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 12 UHF Analog Driver/Transmitter/Translator 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 13 UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction Note: Because of possible FCC assigned offset, check for the assigned Carrier Frequency as written on License. UHF Frequency Assignments Channel Bandwidth Video Color Audio Number (MHz) (MHz) (MHz) (MHz) 470-476 471.25 474.83 475.75 476-482 477.25 480.83...
  • Page 14 UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction Note: Because of possible FCC assigned offset, check for the assigned Carrier Frequency as written on License. UHF Frequency Assignments Channel Bandwidth Video Color Audio Number (MHz) (MHz) (MHz) (MHz) 650-656 651.25 654.83 655.75 656-662 657.25 660.83...
  • Page 15 UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction dBm, dBw, dBmV, dBµ V, & 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...
  • Page 16 UHF Analog Driver/Transmitter/Translator 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 17 UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction ABBREVIATIONS/ACRONYMS Alternating Current Printed circuit board Automatic Frequency Control Quadrature Amplitude Modulation Automatic Level Control Amplitude modulation Automatic Gain Control American wire gauge Bit Error Rate Bandwidth Direct Current Digital to analog Decibel Decibel referenced to 1 milliwatt dBmV Decibel referenced to 1 millivolt Decibel referenced to 1 watt...
  • Page 18 UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction RETURN LOSS VS. VSWR 1.001 1.01 VSWR LX Series, Rev. 3 1-11...

  • Page 19: System Overview

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Chapter 2 System Description, Maintenance & Remote Control Connections System Overview The LX Series can also be used as a driver for external power amplifiers. The The analog transmitters in the Innovator output power of the driver is determined LX Series are complete 10W to 100W by the level needed to attain the full...

  • Page 20: Optional) Exciter Switcher Tray

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME PART NUMBER Driver Amplifier Module, used in 1303771 (1kW) OR OR A6 high power transmitters 1303874 (2kW) Backplane Board, V2, LX Series 1304047 (Optional) Exciter Switcher Assembly 1305727 (110 VAC) OR...

  • Page 21: Receiver Front Panel Switch

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Receiver is used. (NOTE: The IF amplifies the signal, filters off any Processor board must be configured for unwanted out of band energy and external switching by placing jumper controls its own IF gain to make sure W11 on J29 between pins 1 &...

  • Page 22: Modulator Front Panel Switch

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections 2.1.2 (A2) Modulator Module removing the low to TB31-Pin 3 located Assembly (1301929; Appendix B) on the rear of the exciter/driver assembly. By connecting the low, the NOTE: The Modulator module may not Modulator IF output is used by the IF be present in a translator system or in a...
  • Page 23 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections OVER MOD When lit it indicates the Video input level is too high. DS3 (Red) ALT IF When lit it indicates that external or alternate 4.5MHZ is present. DS7 (Green) 10 MHz PRES When lit it indicates that a 10MHz reference is present to the...

  • Page 24: If Processor Front Panel Switch

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections module RF power level with the desired the RF power level control circuit is level and uses the IF Power Control PWM removed from use. When the ALC select line to correct for errors.
  • Page 25 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Table 2-12. IF Processor Front Panel Control Adjustments POTENTIOMETERS DESCRIPTION FREQUENCY These three variable resistors, R103, R106 & R274, adjust the RESPONSE depth of gain for the three stages of frequency response correction. EQUALIZER Adjusts the gain of the transmitter when the transmitter is in the ALC GAIN...

  • Page 26: Vhf/Uhf Upconverter Front Panel Switch

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections resulting signal is amplified and applied controlled by an Automatic Gain Control to a Pin diode attenuator before it is circuit, which maintains a constant connected to the output of the power out of the upconverter, and also upconverter.
  • Page 27 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections 2.1.5 (A4) Control/Power Supply The (A4) Control & Monitoring/Power Module Assembly (110 VAC, Supply Assembly is configured at the 1301936 or 220 VAC, 1303229; factory for operation at 110 VAC or 220 Appendix B) VAC.

  • Page 28: Control & Monitoring/Power Supply Module

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections 2.1.6 (A6) Exciter Power Amplifier Power Amplifier module are routed Module in 10-100W Transmitter or through the floating blind-mate driver in systems above 2kW connector of the Control & (1303770;...
  • Page 29 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections 100 Watts analog, system power is system over-drive condition is detected monitored by an external module that is when this value rises above 0.9 VDC. connected to TB31 and control board When an over-drive condition is SW1 switches must be set off.
  • Page 30 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections 2.1.6.1 (A6) Driver Amplifier Module Assembly {1303771(1kW) or The Driver Power Amplifier module and 1303874(2kW); Appendix B)} any External Amplifier modules contain the same control and monitoring board. This board monitors RF output power, RF reflected power, the current draw of amplifier sections, the supply voltage,...
  • Page 31 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections power greater than 100 Watts, system system over-drive condition is detected power is monitored by an external when this value rises above 0.9 VDC. module that is connected to TB31. In When an over-drive condition is this configuration switches SW1 on the detected, the Upconverter module...

  • Page 32: Exciter/Amplifier Chassis Assembly

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections 2.1.7 RF Output Assemblies front panel is lit and the DC OK on the front panel should also be green. The The RF output from the exciter power enable and DC OK indicators on the PA amplifier is at the RF output jack, an “N”...
  • Page 33 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections the transmitter. This condition is the The standby mode in the transmitter result of a fault that causes the firmware indicates that the output amplifier of the to hold the IF Processor module in a transmitter is disabled.

  • Page 34: Uhf Television Frequencies

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Table 2-27: UHF Television Frequencies CENTER CENTER + Offset - Offset + Offset - Offset FREQUENCY FREQUENCY 473 MHz 473.01 472.99 641 MHz 641.01 640.99 479 MHz 479.01 478.99 647 MHz...

  • Page 35: Maintenance

    2.4 Maintenance will not damage components or the silk- screened markings on the modules and The Innovator LX Series boards. Water-based cleaners can be Driver/Transmitter/translator is designed used, but do not saturate the with components that require little or no components.

  • Page 36: Exciter/Driver Chassis Assembly Rear View

    UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections If your system contains the Optional switcher tray. Refer to Table 2-29 and to Exciter Switcher Assembly, there are also the Exciter Switcher Board schematic remote connections that can be made to drawing (1305705) located in Appendix B the Exciter Switcher Assembly.
  • Page 37 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Signal Name Signal Type/Description Designations When this signal's circuit is completed to ground such as through a jumper between TB30-5 and RMT RF System TB30-15, the transmitter is allowed to operate. If TB30-5 Interlock this circuit is opened, the transmitter switches to a...
  • Page 38 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Signal Name Signal Type/Description Designations Analog Output (0 to 5.00 V). This is the input of IF IF Processor TB31-4 Processor module for digital system RF output DLC Voltage power control.
  • Page 39 UHF Analog Driver/Transmitter/ Chapter 2, System Description, Translator Maintenance & Remote Control Connections Signal Name Signal Type/Description Designations Selected Exciter TB1-15 0 = OK, Open = Fault Interlock Status Alternate Exciter State TB1-16 0 = OK, Open = Fault Alternate Exciter TB1-17 0 = OK, Open = Fault Interlock Status...

  • Page 40: Chapter 3 Site Considerations, Installation And Setup Procedures

    The to be taken into account before the environment in which they are placed is Innovator LX Series analog important and certain precautions must driver/transmitter can be installed. For be taken. The three greatest dangers to...
  • Page 41 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures rarely if ever attainable in the real world. preferred method and is the only way to However, the closer the environment is to create anything close to an ideal this design, the greater the operating environment.
  • Page 42 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures thought of air conditioning only the complete flushing of heated air front of the unit. Cooling air is with no stagnant areas. drawn in at the front of all transmitters and in the front and The filter area must be large back of others.

  • Page 43: Kw Minimum Ventilation Configuration

    5000 watts. If the load is known in BTUs, Axcera can be contacted at (724) 873- 2000 CFM into ½ inch of water will be 8100. required for each 17,000 BTUs. The inlet filter must be a minimum of seven square Figure 3-1.

  • Page 44: Unpacking The Chassis W/Modules, Bandpass And Trap Filters

    6/32” x ½” be directed to the carrier. Inform Axcera Philips screw, mounted between the two as to the extent of any damage as soon connectors, needs to be removed before as possible.

  • Page 45: Ac Input

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures AC Input Box Bandpass Filter Output to Trap Filter Antenna Low Power High Power w/Cabinet Connect the bandpass filter and trap filter 3.4 AC Input to the output of the chassis assembly. Connect the transmission line for the Once the chassis and output connections antenna system to the output of the trap...

  • Page 46: Setup And Operation

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures NOTES: The transmitter is factory set television transmitter. Refer to the setup for either 110 VAC or 220 VAC and operation procedures that follow operation as directed by customer. before applying power to the transmitter.

  • Page 47: Rear View Of Lx Series Analog Transmitter

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Figure 3-4: Rear View of LX Series Analog Transmitter TB02 TB30 TB31 SPARE SPARE Table 3-3: Rear Chassis Connections for the LX Series Analog Transmitter. Port Type Function Impedance AC Input TB02...

  • Page 48: Initial Turn On

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Port Type Function Impedance RJ-45 SCADA (Input / Loop-Thru) CAT5 RJ-45 SCADA (Input / Loop-Thru) CAT5 RJ-45 System RS-485 Serial CAT5 3.5.2 Initial Turn On ALC FLT: This illuminates Red when the ALC can not maintain output level.

  • Page 49: If Processor Module Leds On Front Panel

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures 3.5.2.3 IF Processor Module LEDs on Front Panel 3.5.2.6 Power Amplifier or Driver Module LEDs on Front Panel Fault Indicators: NOTE: Both the PA Module and INPUT FAULT: This illuminates Red if Driver Module have the same front the input to the module is missing or panel LEDs.

  • Page 50: Menu 02 Splash Screen #2

    Main Screen. The Name, 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 3-6: Menu 03 – Exciter Switcher Control Screen This screen indicates that the exciter switcher is in automatic back-up and that Exciter A is selected as the On Air Exciter.
  • Page 51 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-9: Menu 06 – Exciter Switcher Control Screen This screen allows you to cancel the automatic back-up and that Exciter B is selected as the On Air Exciter. Table 3-10: Menu 07 –...

  • Page 52: Front Panel Screens For The Exciter/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 3-16: Menu 10 - Main Screen: This is the default main screen of the transmitter.

  • Page 53: Menu 11 Error List Access Screen

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-17: Menu 11 - Error List Access Screen This screen of the transmitter shows the current number of errors, displayed in upper, right of screen (0), and provides operator access to view Menu 20, the error list screens, by pushing the ENT button.

  • Page 54: Menu 30 Transmitter Device Details Screen

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Menu 30 is entered by selecting ENT at Menu 12, Table 3-8. Table 3-21: Menu 30 - Transmitter Device Details Screen This screen allows access to the transmitter parameters of installed devices. The system is configured to know which devices are present.

  • Page 55: Menu 40 Authorized Personnel Screen

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures System Parameter Normal Faulted (Blinking) Component AFC 1 LEVEL 0 – 5.00 V AFC 2 LEVEL 0 - 5.00 V CODE VERSION Upconverter PLL 1 CIRCUIT LOCKED FAULT Details PLL 2 CIRCUIT LOCKED...
  • Page 56 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures following set-up screens can affect the transmitters output power level, output frequency, and the general behavior of the transmitter. Please do not make changes within the transmitter's set-up screens unless you are familiar with the operation of the transmitter. This screen is implemented in transmitter software version 1.4 and above.

  • Page 57: Menu 40-3 Transmitter Set Up: Receiver Channel Configuration

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-26: 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 58 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-30: Menu 40-6 - Transmitter Set-up: Station ID Screen This screen allows the user to set the Station ID, Call Sign, in analog transmitters. If blank characters are used for all five positions, then the Station ID feature is disabled. Otherwise the Station ID code is transmitted every 15 minutes.
  • Page 59 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-34: Menu 40-10 - Transmitter Set-up: Modulated Output Calibration In analog systems this screen is used to adjust the calibration of the system's modulated output signal detector. The calibration value symbol is again used to graphically represent the modulated output signal detector's calibration value.
  • Page 60 UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-38: Menu 40-14 - Transmitter Set-up: Auto Stand-By Control Certain LX transmitter locations are required to reduce to no output power on the loss of video input. When a LX transmitter is configured for Auto Stand-By On Modulation Loss, the transmitter will switch to stand-by, if a modulated input signal fault is detected by the IF Processor module that lasts for more than ten seconds.

  • Page 61: Operation Procedure

    UHF Analog Driver/Transmitter/ Chapter 3, Site Considerations, Translator Installation and Setup Procedures Table 3-42: Menu 40-18 - Transmitter Set-up: Remote Commands Control This screen is used to allow or deny the use of remote control commands. When disabled, remote commands are not used. Remote commands are commands received either through the rear terminal blocks or through serial messages.

  • Page 62: Chapter 4 Circuit Descriptions

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator Chapter 4 Circuit Descriptions 4.0 (Optional) Exciter Switcher Tray, 4.1 (Optional) (A1) Receiver Module (110 VAC 1305727 or 220 VAC (VHF LB 1304000, VHF HB 1304001 or 1305715); Appendix B) UHF 1304002; Appendix B) NOTE: Part of a dual exciter system.

  • Page 63: Uhf Or Vhf Mixer/Pll Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator receiver, and the other output is looking at the LO sample at J2 with a connected to a peak detector and used spectrum analyzer, adjusting R30 until the by the ALC. The ALC circuit, consisting level is -10 dBm.

  • Page 64: Analog Modulator Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator and a dual stage preamplifier. The 4.2.1 Analog Modulator Board filters are tuned at the RF channel (1301797; Appendix B) frequency and are about 8 MHz wide. They are intended to filter off the The board takes the audio and video inputs unwanted image product 88 MHz below and produces a modulated visual IF +...

  • Page 65: Sap/Pro, Subcarrier Audio Input

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator that connects to the board at J41A Pin common junction of resistors R111, R130, 14A (+) and J41A Pin 13A (-). and R152 that connect to pin 9 of amplifier U13C. The output audio signal at pin 8 of NOTE: For the transmitter to operate U13C is typically .8 Vpk-pk at a ±25 kHz using the composite audio input the...

  • Page 66: Main Video Signal Path (Part 1 Of 2)

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator The output of U18A, “N”, is fed back The baseband video input connects to the through CR28 and C85 to the board at J41A pins 19A (-), “W”, and 20A 4.5 MHz VCO IC U16, which sets up a PLL (+), “V”.

  • Page 67: Sync Tip Clamp Circuit

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator video at “P” connects to U32 and U33 junction of R44, R62 and R300 is that provides a zero adjust and a 1 Volt connected to a white clipper circuit output level, which connects at “T” to consisting of Q1 and associated circuitry.

  • Page 68: Visual Modulator Circuit

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator Q24 through C169. This circuitry U23A is split with one part connecting to operates the crystal in a common-base Q26 that shuts down the 45.75 MHz amplifier configuration using Q24. The oscillator. Another path connects to Q25 operating frequency of the oscillator is the conducts and lights the LED DS7, maintained by a PLL circuit, which...

  • Page 69: Voltage Requirements

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator signal from L31 of the splitter connects to to a splitter matching network consisting of U28, where it is amplified and wired to T3 and T4. One part of signal connects to pin 1, the L input of mixer Z1.

  • Page 70: Modulator Selected

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator and the receiver IF input connects to is used to slightly steer the frequency relay K4. response of the IF to make up for any small discrepancies in the frequency The Modulator select enable/disable response in the stages that precede this jumper W11 on J29 controls whether the point.

  • Page 71: Pin-Diode Attenuator Circuit

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator As part of the threshold detector of U9C and U9D. The reference voltage for operation, the minimum IF input level at the comparators is determined by a TP3 is fed through detector CR15 to op- voltage divider consisting of R243, R65, amp IC U9A, pin 2.

  • Page 72: Main If Signal Path (Part 2 Of 3)

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator function as voltage-variable resistors at applied to the pin diodes, the IF signal this intermediate frequency. The value of level is maintained at the set level. the resistance is controlled by the DC bias supplied to the diode.

  • Page 73: Main If Signal Path (Part 3 Of 3)

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator the diodes CR24 and CR25 to turn on, generating current flow that puts them in The pre-distorted IF signal in the parallel with the L-pad. When the diodes Quadrature path connects to op amp U20 are put in parallel with the resistors, the and then step up transformer T9, next op attenuation through the L-pad is lowered,...

  • Page 74: Alc Circuit

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator The IF is next amplified by U13 and U14. After amplification, the IF is split with one The ALC voltage, and the DC level path connected to J42C pin 1C the IF corresponding to the IF level after signal output to the LO/Upconverter Module.

  • Page 75: Vdc Needed To Operate Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator employed: one is a very fast-acting Board, LX Series, L-Band PLL Board, LX circuit to increase the attenuation of the Series and the Upconverter Control Board, pin-diode attenuator, CR1, CR2, and LX Series. This module takes an external CR3, and the second is the reference IF and converts it to the final RF output voltage being pulled away from the ALC...

  • Page 76: First Conversion Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator at J1 pin 4. The IC generates an error filter rejects any LO leakage at 1 GHz and current that is applied to U3 and its also any unwanted out of band products. associated components to generate a The output of the filter is amplified by U5 bias voltage for the VCO's AFC input.

  • Page 77: Power Protection Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator The output of the relay is split to drive The AC input to the Exciter/Amplifier multiple outputs, some internal and Chassis Assembly is connected from J1, some external. The external outputs part of a fused entry module, located on leave the board at J1-22C and J1-31B the rear of the chassis assembly to J50 on and are used by the external receiver...

  • Page 78: Schematic

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator The polyswitch resettable fuses may The connections from J62 and J63 of the open on a current as low as 2.43 Amps Power Protection Board are wired to J62 at 50°C, 3 Amps at 25°C or 3.3 Amps at and J63 on the Control Board.

  • Page 79: Schematic Page 2

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator U3 and U4 are used to selectively enable remote input voltage is less than the turn various input and output ICs found on on threshold of the FET (about 2 VDC), a pages 2 &...

  • Page 80: Schematic Page 5

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator 20 position connectors that provide the conducting, both control lines LOW. The +12 VDC and –12 VDC power through amber color is produced because the the Power Protection Board. The ±12 current applied to the green element is VDC generated by the switching power slightly greater than the red element.

  • Page 81: Watt Uhf Amplifier Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator supplies DC OK, at J1-4 & 3, and AC OK, (EMI) protection, as well as the heatsink, at J1-2 & 1, status to the control board. for the 1-watt UHF amplifier board A Power Supply enable connects from (1302762) that is mounted inside the the control board to the power supply at...

  • Page 82: Watt Uhf Amplifier Assembly

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator 4.6.3 (A4-A1) 40 Watt UHF Amplifier Z801, in conjunction with capacitors C800 Assembly (1304490; Appendix B) and C819, serves as a phase shifter. Phase alignment, for the complete The output of the UHF filter is connected amplifier, as well as quiescent current to the input J1 of (A2) the 40 Watt UHF settings are achieved by means of...

  • Page 83: Uhf Module Assembly, Rf Module Pallet

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator 4.6.4 (A3) UHF Module Assembly, RF and reflected ports, J5 and J4, of the Module Pallet, Philips (1300116; coupler. Appendix B) 4.6.6 (A5) Amplifier Control Board The UHF Module Assembly, 250-watt (1303682 or 1301962; Appendix B) module (Figure 4-2) is a broadband amplifier for the frequency range 470 to The amplifier control board provides LED...
  • Page 84 UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator U6 is a serial to RS-485 driver IC. U7 is around U13B is used to provide gate a watchdog IC used to hold the voltage to Q10 that is 5 volts greater than microprocessor in reset, if the supply the source pin of this FET.
  • Page 85 UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator allow for short duration high current A Reflected Power Sample enters the board loading of the supply. By measuring the at SMA Jack J5 and is detected by CR20 current through the sense resistor with and the DC level amplified by U28B.

  • Page 86: Coupler Board Assembly

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator NOTE: In a 1kW system a 1303771 Driver PA Assembly is used and in a The +12-VDC bias voltage connects 2kW system a 1303874 Driver PA through J5, a RF -bypassed, feed-through Assembly is used as the driver for high capacitor, to the amplifier board.
  • Page 87 UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator Matching Matching Network Network 3 dB Coupler 3 dB Coupler Input Dynamic R 10 Equalization +Uop Output R 11 R 12 Matching Matching Network Network Figure 4-4. 250 Watt UHF Amplifier Module 4.7.3 (A2) 40 Watt UHF Amplifier be required, after repair work, to ensure Assembly (1304490;...

  • Page 88: Schematic

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator output to (A5) the amplifier control board 4.7.5.1 Schematic Page 1 where it connects to the input of the overdrive-protection circuit. U4, located upper center of page, is an in circuit microcontroller. The controller is The RF input to the UHF coupler operated at the frequency of 3.6864 MHz assembly, from the 40 Watt UHF...

  • Page 89: Current Monitoring Sections Of The Board

    UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator 4.7.5.2 Schematic Page 2 The ICs U16, U17 and U18 along with In the lower right corner are voltage associated components set up the current regulator circuits. U22 should allow for monitoring sections of the board. R67, 0.14 amps of power using its 92 C/W R68 and R69 are 0.01O/5W 1% through rating if Ta = 60°C max and Tj = 125°C...
  • Page 90 UHF Analog Driver/Transmitter/ Chapter 4, Circuit Descriptions Translator A Forward Power Sample enters the reference level a low output is produced board at SMA Jack J3 and is split. One and connected to the Reflected Power part connects to J4 on the board that is Shutdown circuit at CR28.

  • Page 91: Chapter 5 Detailed Alignment Procedures

    The failed module can then be sent back to Axcera for repair. Contact Note: Each Module has an assigned slot Axcera Customer Service Department at and will not fit properly or operate in the 724-873-8100 or fax to 724-873-8105, incorrect slot.

  • Page 92: Lx Series Exciter/Amplifier Chassis Assembly

    UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator factory with the readings on each of the Verify that all LEDs located on the front modules. The readings should be very panel of the Receiver are Green. The similar. If a reading is way off, the following details the meaning of each problem is likely to be in that module.

  • Page 93: If Processor Module Assembly

    UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator VISUAL UNLOCK (DS6) – Red the ±25 kHz deviation on the front panel Indicates that the Nominal 45.75 MHz screen. visual IF is unlocked from the 10 MHz reference. STEREO SET UP: The modulator was factory set for a ±75 kHz deviation with a AUDIO OVER DEVIATION (DS4) –...

  • Page 94: Vhf/Uhf Upconverter Assembly

    UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator 5.2.4 VHF/UHF Upconverter Module Setting the Auto AGC Assembly With the transmitter in Standby, preset Switch the transmitter to Operate. Verify the AGC pot on the Upconverter full that all LEDs located on the front panel of Counterclockwise.
  • Page 95 UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator Place the transmitter in Standby and go step through the channels until the to the Set Up Menu, Transmitter desired channel is reached. Configuration Access Screen, on the LCD Display by pushing the down arrow on To select a 10kHz offset to the channel the default main screen and each frequency, use the >...
  • Page 96 UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator Accept or Return to previous Menu panel LCD display in the % Visual Output Screen position. (Examples of the screens are shown below). Pushing these two Pushing these buttons together two buttons will accept the together will return change.
  • Page 97 UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator the normal operating position for the switch. Adjust the ALC pot on the IF • Sync + black 0 IRE Processor is needed to attain 100% setup/wattmeter=595 watts output power. Switch to Manual Gain (Manual AGC) and adjust the Manual •...
  • Page 98 UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator NOTE: In Systems with the new (A11) coupler to the unused “INC” port frequency agile upconverters the on the coupler. Then adjust R39 on (A4) following procedure must also be the visual/aural metering board for a completed.

  • Page 99: Linearity Correction Adjustment

    If a problem occurred during the amplitude distortion pre-correction that procedure, help can be found by calling is needed. Next adjust the middle Axcera field support at 724-873-8100. linearity correction adjustment R216 threshold cut in also for the in phase 5.2.7 Linearity Correction...

  • Page 100: Frequency Response Delay Equalization Adjustment

    UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator 5.2.8 Frequency Response Delay no aural present by removing the aural Equalization Adjustment IF carrier jumper on the back of the chassis assembly. Connect a sync and NOTE: Perform the following procedure black test signal to the video input jack only if a frequency response delay of the test modulator.

  • Page 101: Bandpass Filter Assembly

    See Table 5-1 for typical bandpass network analyzer. If tuning is thought to values. be required, consult with the Axcera Field Table 5-1. Typical Bandpass Values FREQUENCY INSERTION LOSS (dB) RETURN LOSS (dB) -4.5...

  • Page 102: Uhf Trap Filter Assembly

    UHF Analog Driver/Transmitter/ Chapter 5, Detailed Alignment Procedures Translator Figure 5-2. Bandpass Filter 5.4 (A10) UHF Trap Filter Assembly to Tune the Notch Frequency. The Depth of the Notch is set by the gap The Traps on the output Trap Filter are between the Center Conductor of the labeled with their Center Frequency Trap Section and the Center Conductor...

  • Page 103: Effects Of Tuning The Output Trap Filter

    10 dB. must be in manual. This completes the detailed alignment procedures for the LX Series transmitter. If a problem occurred during the alignment, help is available by calling Axcera field support at (724) 873-8100. LX Series, Rev. 3 5-13...
  • Page 104 APPENDIX A LX SERIES ANALOG SYSTEM SPECIFICATIONS...
  • Page 106 * For transmitters use “T” suffix, translators use “L” suffix (ex. LU100AT - 100W Transmitter) 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.
  • Page 107 APPENDIX B DRAWINGS AND PARTS LISTS...
  • Page 108 UHF Analog Driver/Transmitter/Translator Appendix B, Drawings and Parts Lists Innovator LX Series Analog System LX Series Analog Transmitter/Translator System Interconnect ....1303478 (6 kW Transmitter/Translator) 1304311 Filter Metering Assembly (Used in 10W-100W Systems) Assembly Drawing ................1303566 Parts List..................1303566 (Optional) Single Channel Exciter Switcher Tray, 110VAC Interconnect.................1305739...
  • Page 109 UHF Analog Driver/Transmitter/Translator Appendix B, Drawings and Parts Lists VHF Low Band Preamplifier Board, (Used in VHF LB Receiver Assembly 1304000) Schematic ..................1305214 IF Processor Assembly Assembly Drawing ................1301938 IF Processor Board Schematic ..................1301983 VHF/UHF Upconverter Assembly Block Diagram................1303830 Interconnect.................1303831 Downconverter Board Assembly Schematic ..................1303836 First Conversion Board, LX Series...
  • Page 110 UHF Analog Driver/Transmitter/Translator Appendix B, Drawings and Parts Lists Schematic ..................1303152 Amplifier Control Board, (Used in PA Assembly 1303770 and Driver PA Assemblies 1303771 and 1303874) Schematic ..................1303683 1 Watt Module Assembly, (Used in PA Assembly 1303770 and Driver PA Assemblies 1303771 and 1303874) Contains a 1 Watt UHF Amplifier Board (1302761).

  • Page 111: Appendix C Transmitter Log Sheet

    APPENDIX C TRANSMITTER LOG SHEET...
  • Page 112 UHF LX Series Driver/Transmitter/Translator Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER DATE READINGS TAKEN Model Number Code Version Firmware Number OUTPUT MEASUREMENTS % VISUAL POWER % AURAL POWER RECEIVER DETAILS NOT USED WITH TRANSMITTER AFC 1 LEVEL PLL 1 CIRCUIT ALC INPUT FAULT AT...
  • Page 113 UHF LX Series Driver/Transmitter/Translator Appendix C, Log Sheet DESCRIPTION OF TRANSMITTER READING FROM LCD DISPLAY PARAMETER DRIVER AND PA DETAILS POWER SUPPLY STATE, 32V FORWARD POWER REFLECTED POWER AMP 1 CURRENT AMP 2 CURRENT TEMPERATURE CODE VERSION PA HAS OPERATED FOR EXT.
  • Page 114 UHF LX Series Driver/Transmitter/Translator 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 PA HAS OPERATED FOR...
  • Page 115 UHF LX Series Driver/Transmitter/Translator 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 PA HAS OPERATED FOR...
  • Page 116 UHF LX Series Driver/Transmitter/Translator 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 PA HAS OPERATED FOR...
  • Page 117 UHF LX Series Driver/Transmitter/Translator 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 PA HAS OPERATED FOR...
  • Page 118 UHF LX Series Driver/Transmitter/Translator 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 PA HAS OPERATED FOR...
  • Page 119 UHF LX Series Driver/Transmitter/Translator 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 PA HAS OPERATED FOR...

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