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Axcera Innovator LX Series Instruction Manual

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INSTRUCTION MANUAL
Innovator
LX Series

Power Amplifier

Assembly
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: Power Amplifier

    INSTRUCTION MANUAL Innovator LX Series Power Amplifier Assembly 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

    4.2 Power Supply Assembly .................4-5 CHAPTER 5 DETAILED ALIGNMENT PROCEDURES 5.1 Module Replacement................5-1 5.1.1 Initial Test Setup................5-1 5.2 Innovator LX Series Exciter/Amplifier Chassis Assembly ......5-2 5.2.1 Linearity Correction Adjustment.............5-3 5.2.2 Frequency Response Delay Equalization Adjustment ......5-4 5.2.3 Calibration of Forward Output Power Level........5-4 5.2.4 Calibration of Reflected Output Power Level ........5-5...
  • Page 3 TABLE OF CONTENTS - (Continued) 5.4 UHF Trap Filter Assembly ...............5-5 5.4.1 The Effects of Tuning the Output Trap Filter ........5-6 APPENDICES APPENDIX A INNOVATOR LX SERIES SPECIFICATIONS APPENDIX B DRAWINGS AND PARTS LISTS LX Series, Rev. 0 November 25, 2003...
  • Page 4 LX Series Power Amplifier Assembly Table of Contents LIST OF FIGURES FIGURE PAGE 1 kW Minimum Ventilation Configuration ..........3-4 Front and Rear View Reconnection Drawing ........3-5 Rear View of LX Series Transmitter ..........3-6 UHF Amplifier Module, 250 Watts.............4-2 Typical Red Field Spectrum .............5-4 LX Series, Rev.
  • Page 5 LX Series Power Amplifier Assembly Table of Contents LIST OF TABLES TABLE PAGE LX Series Power Amplifier Assemblies..........2-1 Power Amplifier Status Indicators ............2-3 Power Amplifier Control Adjustments..........2-3 Power Amplifier Sample ..............2-3 Pioneer Chassis Customer Remote Connections ......2-5 Rear Chassis Connections for LX Series Transmitter ......3-6 Menu 01 Splash Screen #1 .............3-7 Menu 02 Splash Screen #2 .............3-7 Menu 10 Main Screen ..............3-7...

  • Page 6: Chapter 1 Introduction

    The transmitters and associated power the safety information in this chapter, amplifier assemblies manufactured by before you begin to install or operate Axcera are designed to be easy to use the unit. and repair while providing protection from electrical and mechanical hazards.

  • Page 7: Maintenance

    This could The MRA# is intended to be used when lead to a thermal shutdown or the the unit is returned to Axcera. In premature failure of the affected addition, all shipping material should be modules.

  • Page 8: Limited One-Year Warranty For Axcera Products

    LX Series Power Amplifier Assembly Chapter 1, Introduction When shipping an item to Axcera, please warranty, (b) the defective product is include the MRA# on the packing list and properly packed and returned by the on the shipping container. The packing...
  • Page 9 LX Series Power Amplifier Assembly Chapter 1, Introduction ! ! ! ! WARNING!!! " " " " HIGH VOLTAGE # # # # 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.
  • Page 10 LX Series Power Amplifier Assembly 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 11 LX Series Power Amplifier Assembly Chapter 1, Introduction dBm, dBw, dBmV, dBµ µ µ µ V, & VOLTAGE EXPRESSED IN WATTS 50 Ohm System WATTS PREFIX 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...
  • Page 12 LX Series Power Amplifier Assembly 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)
  • Page 13 LX Series Power Amplifier Assembly 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...
  • Page 14 LX Series Power Amplifier Assembly Chapter 1, Introduction RETURN LOSS VS. VSWR 1.001 1.01 VSWR LX Series, Rev. 0...

  • Page 15: Lx Series Power Amplifier Assembly Overview

    LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & Remote Control Connections Chapter 2 Amplifier Assembly Description & Remote Control Connections 2.1 LX Series Power Amplifier exciter/driver. The output of the Assembly Overview amplifier assembly at the “N” connector J205 is cabled to A9 the bandpass filter The (A3) power amplifier assembly in the for the system.
  • Page 16 LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & Remote Control Connections to J200 the RF input to the PA Assembly. systems, aural and visual power will only This module contains RF monitoring be reported for the final system RF circuitry for both an analog and a digital output.

  • Page 17: Power Supply Module Assembly

    LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & Remote Control Connections Table 2-2. Power Amplifier Status Indicator FUNCTION When lit Green, it indicates that the PA is in the Operate Mode. If a ENABLED Mute occurs, the PA will remain Enabled, until the input signal is (Green) returned.

  • Page 18: Principles Of Operation

    LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & Remote Control Connections If the transmitter does not switch to • Modulator (if present) is in Operate when the operate menu is Aural/Visual Mute switched to Operate, check that all faults are cleared and that the remote control Entering Operate Mode terminal block stand-by signal is not...

  • Page 19: Customer Remote Connections

    LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & Remote Control Connections therefore detectors of power amplifiers • Receipt of a “Standby CMD” over the are calibrated at their frequency of use. serial interface. The detectors for System RF monitoring are also calibrated at the desired Operating Frequency frequency of use.
  • Page 20 LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & Remote Control Connections Signal Name Signal Type/Description Designations Discrete Open Collector Inputs, Discrete Open Drain Outputs, or 0 - 5 VDC Analog Input - When used as an RMT AUX IO 1 TB30-4 output, this line is pulled to +5 VDC with a 1.0 kΩ...
  • Page 21 LX Series Power Amplifier Assembly Chapter 2, Amplifier Assembly Description & 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 power DLC Voltage control.

  • Page 22: Chapter 3 Site Considerations, Installation And Setup Procedures

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Chapter 3 Site Considerations, Installation and Setup Procedures There are special considerations that reasonably low humidity, and a dust-free need to be taken into account before the room.
  • Page 23 LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures sources of heat, such as personnel, and Do not have the air conditioner all should be taken into account. blowing directly onto the transmitter. Under certain Now that the amount of heat that must conditions, condensation may be removed is known, the next step is to occur on, or worse in, the...
  • Page 24 (see Figure 3-1). controlled, and be interlocked with the transmitter. System interlocking and thermostat settings should be reviewed with Axcera. As with any equipment installation, it is LX Series, Rev. 0...

  • Page 25: Unpacking The Chassis W/Modules, Bandpass And Trap Filters

    Inform Axcera as to the extent of any transmission line. The chassis or cabinet damage as soon as possible. in which it is mounted should be grounded using copper strapping material.

  • Page 26: Ac Input

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures be removed from the rear of the chassis NOTE: To pull out any power amplifier assembly. module for replacement purposes, the input and output coaxial cables must first Figure 3-2.

  • Page 27: Rear View Of Lx Series Transmitter

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Figure 3-3: Rear View of LX Series Transmitter TB02 TB30 TB31 Table 3-1: Rear Chassis Connections for the LX Series Transmitter. Port Type Function AC Input TB02 Term Base Band Audio Input Composite Audio Input...

  • Page 28: Front Panel Screens For The Exciter/Amplifier Chassis Assembly

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures 3.5.2 Front Panel Screens for the characters are special characters used to Exciter/Amplifier Chassis Assembly navigate up or down through the menu screens. Display text flashes on discrete A 4 x 20 display located on the front of fault conditions for all screens that the Control &...

  • Page 29: Menu 11 Error List Access Screen

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-5: Menu 11 - Error List Access Screen ↑ ↓ This screen of the transmitter shows the current number of errors and provides operator access to view the error list. This is the entry point to Menu 20. If ENT is pushed, go to Menu 20.

  • Page 30: Menu 30 Transmitter Device Details Screen

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-9: Menu 30 - Transmitter Device Details Screen M O D E O W E ↑ ↓ This screen of the transmitter allows access to the transmitter parameters of installed devices.

  • Page 31: Menu 40 Transmitter Set Up: Power Raise/Lower Screen

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures System Component Parameter Normal Faulted (Blinking) FORWARD POWER xxx% xxx% REFLECTED POWER xxx% xxx% AMP 1 CURRENT xx.xA xx.xA AMP 2 CURRENT xx.xA xx.xA TEMPERATURE CODE VERSION POWER SUPPLY STATE ON or OFF...

  • Page 32: Menu 40-2 Transmitter Set Up: Frequency Select Screen

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-14: Menu 40-2 - Transmitter Set-up: Frequency Select Screen ↑ ↓ This screen of the transmitter is allows access to transmitter frequency set-up parameters. The choices of this screen are 'TABLE' or 'CUSTOM'. When table is selected, the next menu will be used to select the desired operating frequency.

  • Page 33: Menu 40-7 Transmitter Set Up: Station Id Screen

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-18: Menu 40-6 - Transmitter Set-up: Serial Address Screen D D R ↑ ↓ This screen allows the user to set the serial address of the transmitter. The default address is 5.
  • Page 34 LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-22: Menu 40-10 - Transmitter Set-up: System Reflected Power Calibration ↑ ↓ This screen is used to adjust the calibration of the system's reflected power. Table 3-23: Menu 40-11 - Transmitter Set-up: Forward Power Fault Threshold Screen O W E ↑...

  • Page 35: Initial Turn On

    LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures output sets a linear circuit voltage that VIDEO LOSS: This indicates the loss of is controlling a non-linear power circuit. Video to the modulator, when Red. If a problem occurred during the setup OVER MOD: This illuminates Red when and operation procedures, refer to the video is overmodulated.
  • Page 36 LX Series Power Amplifier Assembly Chapter 3, Site Considerations, Installation and Setup Procedures DC OK - This illuminates Green when the DC outputs that connect to the TEMP - This illuminates Green when modules in the transmitter are the temperature of the heatsink in the present.

  • Page 37: Chapter 4 Circuit Descriptions

    LX Series Power Amplifier Assembly Chapter 4, Circuit Descriptions Chapter 4 Circuit Descriptions The RF from the exciter/driver assembly pin 2. The gain between pins 1 and 2 connects from the RF Output “N” Jack J25, changes with the voltage applied across through a RG-55 cable, to the PA RF Input CR4 and CR5.
  • Page 38 LX Series Power Amplifier Assembly Chapter 4, Circuit Descriptions The amplification circuit consists of The UHF Module Assembly, 250-watt LDMOS transistors Q1 and Q2 connected module (Figure 4-1) is a broadband in parallel and operating class AB. The amplifier for the frequency range 470 to paralleling network is achieved with the 860 MHz.

  • Page 39: Amplifier Control Board

    LX Series Power Amplifier Assembly Chapter 4, Circuit Descriptions 4.1.6 (A5) Amplifier Control Board U5 below U3 is used for getting digital (1301962; Appendix B) input information of the board. Page two has several monitoring circuits that provide The amplifier control board provides LED information on the amplifier’s status.
  • Page 40 LX Series Power Amplifier Assembly Chapter 4, Circuit Descriptions amplifier U17 or U18 at high current shut to J6 pins 1 & 2 on the board wand is down should be greater than 15 Amps. wired to the comparator IC U10B. If the temperature increases above 75°C the U14B is used to turn Off the gate of Q10 output will go Low that is used as a...

  • Page 41: Power Supply Assembly

    LX Series Power Amplifier Assembly Chapter 4, Circuit Descriptions and connected to the Reflected Power 4.2 Power Supply Assembly (1302863; Shutdown circuit at CR28. The low shuts Appendix B) off Q14 causing pin 3 to go high that is connected to the inverter U15C. The The Power Supply Assembly contains (A1) output of U15C goes low producing a a +32V/2000W switching power supply...

  • Page 42: Chapter 5 Detailed Alignment Procedures

    5.1.1 Initial Test Set Up The power amplifier assembly of the Check that the RF output at the coupler Innovator LX Series transmitter is of a is terminated into a dummy load of at Modular design and when a Module fails least the rated output of the system.
  • Page 43 LX Series Power Amplifier Assembly Chapter 5, Detailed Alignment Procedures Power Amplifier and the adjustment of the linearity and phase predistortion to ALTERNATE IF (DS7) – Red Indicates compensate for any nonlinear response that an external 45.75 MHz IF is not of the Power Amplifier.

  • Page 44: Linearity Correction Adjustment

    LX Series Power Amplifier Assembly Chapter 5, Detailed Alignment Procedures correct, adjust the SAP/PRO Audio Gain DS1, AGC Cutback, just starts to flash. pot R150, located on the front panel of Return the output power of the the modulator, as necessary, for the transmitter to 100%.

  • Page 45: Frequency Response Delay Equalization Adjustment

    LX Series Power Amplifier Assembly Chapter 5, Detailed Alignment Procedures Figure 5-1. Typical Red Field Spectrum 5.2.2 Frequency Response Delay Note: The frequency response Equalization Adjustment adjustment is done at IF, so the frequency cut-in points will be The procedure for performing a reversed at the UHF frequencies.

  • Page 46: Bandpass Filter Assembly

    If you think tuning is reference level is attained. Peak L1 and needed consult Axcera Field Support C8 for a maximum aural power reading, Department before beginning the then adjust R20 for .8V, at TB30-15 and adjustment.

  • Page 47: The Effects Of Tuning The Output Trap Filter

    LX Series Power Amplifier Assembly Chapter 5, Detailed Alignment Procedures adjustments. The Trap Filter is effect the Notch Depth in addition to the comprised of four trap sections Center Frequency. The variable that is connected to the main transmission line. being adjusted with this procedure is the length of the Center Conductor inside the The Trap Sections are Reflective Notches,...
  • Page 48 LX Series transmitter. The Transmitter is ready for normal If a problem occurred during the operation. alignment, help can be found by calling Axcera field support at 724-873-8100. LX Series, Rev. 0...
  • Page 49 APPENDIX A LX SERIES SYSTEM SPECIFICATIONS...
  • Page 51 * 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 52 APPENDIX B DRAWINGS AND PARTS LISTS...
  • Page 53 LX Series Power Amplifier Assembly Appendix B, Drawings and Parts Lists LX Series High Power System LX Series Amplifier Line Up Block Diagram..........1302633 LX Series System Transmitter Interconnect (6kW)........1304311 LX Series System Typical Racking Plan (6kW) ........1304310 LX Series System Phasing Diagram (6kW)..........1304329 LX Series Block Diagram (6kW)............1304561 Chassis Assembly, Power Amplifier, LX Series 1 kW LX Series DC Harness Chassis/Airbox Interconnect ......1303482...

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