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.
Digital UHF Driver/Transmitter Table of Contents TABLE OF CONTENTS CHAPTER 1: INTRODUCTION SECTION PAGE 1.1: Manual Overview..................................................................................1-1 1.2: Assembly Designation Numbers .............................................................1-1 1.3: Safety.................................................................................................1-2 1.4: Contact Information ................................................................
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 ............
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.
Digital UHF Driver/Transmitter Table of Contents LIST OF FIGURES FIGURE 1-1: PAGE Brady Marker Identification Drawing.................................................1-1 2-1: 2-2: Digital LX Series Front View Modules and Assemblies .........................2-1 Rear View LX Series Driver/Amplifier Chassis Assembly .................... 2-11 3-1: 3-2: 3-3: 3-4: 3-5: 3-6: 500 Watt Minimum Ventilation Configuration .....................................3-4 Tray Slide Cabinet Mounting Diagram ..............
Digital UHF Driver/Transmitter Table of Contents LIST OF TABLES TABLE 2-1: 2-2: 2-3: 2-4: 2-5: 2-6: 2-7: 2-8: 2-9: 2-10: 2-11: 2-12: 2-13: 2-14: 2-15: 2-16: PAGE Digital LX Series Modules and Assemblies .........................................2-1 IF Processor Front Panel Switch .......................................................2-3 IF Processor Front Panel Status Indicators ........................................2-3 IF Processor Front Panel Control Adjustments....................................
Digital UHF Driver/Transmitter Chapter 1, Introduction Chapter 1: Introduction 1.1: Manual Overview 1.2: Assembly Designators This manual explains the installation, setup, alignment, and maintenance procedures for the LX Series modular Digital UHF driver/transmitter. If your transmitter contains external power amplifier assemblies, then information and drawings on the external amplifier assemblies are contained in Volume 2.
Digital UHF Driver/Transmitter Chapter 1, Introduction 1.3: Safety Replacement Parts – When replacement parts are used, be sure that the parts have the same functional and performance characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards. Please contact the Axcera Technical Service Department if you have any questions regarding service or replacement parts.
Digital UHF Driver/Transmitter Chapter 1, Introduction The RMA# can be obtained from any Axcera Field Service Engineer by contacting the Axcera Field Service Department at (724) 873-8100 or by fax at (724) 873-8105. This procedure applies to all items sent to the Field Service Department regardless of whether the item was originally manufactured by Axcera.
Digital UHF Driver/Transmitter Chapter 1, Introduction F WARNING!!! × HIGH VOLTAGE Ø DO NOT ATTEMPT TO REPAIR OR TROUBLESHOOT THIS EQUIPMENT UNLESS YOU ARE FAMILIAR WITH ITS OPERATION AND EXPERIENCED IN 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.
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. RESCUE BREATHING 1. Find out if the person is breathing. You must find out if the person has stopped breathing.
Digital UHF Driver/Transmitter Chapter 1, Introduction dBm, dBw, dBmV, dBµV, & VOLTAGE EXPRESSED IN WATTS 50 Ohm System WATTS 1,000,000,000,000 100,000,000,000 10,000,000,000 1,000,000,000 100,000,000 10,000,000 1,000,000 100,000 10,000 1,000 100 50 20 10 1 0.1 0.01 0.001 0.0001 0.00001 0.000001 0.0000001 0.00000001 0.000000001 0.0000000001 0.00000000001 0.
Digital UHF Driver/Transmitter Chapter 1, Introduction USEFUL CONVERSION FACTORS TO CONVERT FROM TO MULTIPLY BY mile (US statute) kilometer (km) inch (in) millimeter (mm) inch (in) centimeter (cm) inch (in) meter (m) foot (ft) meter (m) yard (yd) meter (m) mile per hour (mph) kilometer per hour(km/hr) mile per hour (mph) meter per second (m/s) pound (lb) kilogram (kg) gallon (gal) liter U.S. liquid (One U.S. gallon equals 0.
Digital UHF Driver/Transmitter Chapter 1, Introduction RETURN LOSS VS. VSWR 0 -10 -20 R E -30 T U R N dB L O S S -40 -50 -60 -70 1.001 1.01 1.1 VSWR LX Series, Rev. 1 1-8 2.
Digital UHF Driver/Transmitter Chapter 1, Introduction ABBREVIATIONS/ACRONYMS AC Alternating Current FM Frequency modulation AFC Automatic Frequency Control FPGA Field Programmable Gate Array ALC Automatic Level Control Hz Hertz AM Amplitude modulation ICPM Incidental Carrier Phase Modulation AGC Automatic Gain Control I/P Input AWG American wire gauge IF Intermediate Frequency BER Bit Error Rate LED Light emitting diode BW Bandwidth LSB Lower Sideband DC Direct Current M
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Chapter 2 System Description, Maintenance & Remote Control Connections A3 A5 A4 A6 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 1301941 A3 IF Processor Module 1301938 A4 Control/Power Supply Module 1303229 (220 VAC) A5 LO/Upconverte
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.1 (A3) IF Processor Module Assembly (1301938; Appendix A) module RF power level with the desired 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 external digital modulator (DT1B/C).
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.
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.2 (A5) LO/Upconverter Module Assembly (1301930; Appendix A) voltage set by another front panel potentiometer. When the Upconverter is set for manual gain, the RF output of the Upconverter is set by the front panel AGC potentiometer. In manual gain operation, the AGC #1 feedback voltage from the PA is not used to adjust the RF level unless an over-drive condition is detected.
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections signal. The frequency synthesizer IC uses a 10 MHz reference frequency for signal conversion. Typically the IF input is a 0 dBm @ 44 MHz to the upconverter through the backplane board is applied to a mixer mounted on the first conversion board.44 MHz for digital systems. To obtain different output RF frequencies, the synthesizer IC is serial programmed by the Control Monitoring board.
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections 2.1.3 (A4) Control/Power Supply Module Assembly, 220 VAC (1303229; Appendix A) Board (1302837) and a Switch Board (1527-1406). The Assembly also 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. The Assembly provides all transmitter control and monitoring functions.
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.
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections Table 2-13: Driver Amplifier Status Indicator LED 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) module are OK.
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 front panel is lit and the DC OK on the front panel should also be green. The enable and DC OK indicators on the PA Module will also be green. The RF output from the exciter power amplifier is at the RF output jack, an “N” connector J25, PA RF Output, of the chassis assembly.
Digital UHF Driver/Transmitter Chapter 2, System Description, Maintenance & Remote Control Connections operate mode where the +32 VDC section of the power supply is enabled but there is no RF output power from the transmitter. This condition is the result of a fault that causes the firmware to hold the IF Processor module in a mute state. Standby Mode Operate Mode with Mute Condition Similar to the operate mode, the standby mode is entered using various means.
Digital UHF Driver/Transmitter feature is implemented in transmitter software versions 1.4 and above. 2.5 Maintenance The Innovator LX Series Driver/Transmitter is designed with components that require little or no periodic maintenance except for the routine cleaning of the fans and the front panels of the modules. Chapter 2, System Description, Maintenance & Remote Control Connections excellent way to suction out the dirt.
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 Pin Signal Name Signal Type/Description Designations RMT Transmitter Discrete Open Collector Output - A low indicates that the TB30-1 State transmitter is in the operate mode.
Digital UHF Driver/Transmitter Signal Name RMT Spare 1 RMT Spare 2 Pin Designations TB30-13 TB30-14 System Reflect Power TB31-13 System Visual / Forward Power TB31-14 System Aural Power TB31-15 IF Processor IF Signal Select TB31-3 IF Processor DLC Voltage TB31-4 UC AGC #2 Voltage TB31-5 Chapter 2, System Description, Maintenance & Remote Control Connections Signal Type/Description Remote connection to spare module - Use is TBD. Remote connection to spare module - Use is TBD.
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.
Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures the building. To achieve this, a few issues need to be resolved. The first step is to determine the amount of heat to be removed from the transmitter room. There are generally three sources of heat that must be considered. The first and most obvious is the heat from the transmitter itself.
Digital UHF Driver/Transmitter 5. Chapter 3, Site Considerations, Installation and Setup Procedures recommended to keep the transmitter from operating without the necessary cooling. 7. The inlet and outlet(s) must have automatic dampers that close any time the ventilation blower is off. The periodic cleaning of all filters is a must. 8. In those cases in which transmitters are regularly off for a portion of each day, a temperature-differential sensor that controls a small heater must be installed.
Digital UHF Driver/Transmitter 14. Chapter 3, Site Considerations, Installation and Setup Procedures It is recommended that a site plan be submitted to Axcera for comments before installation begins. The information presented in this section is intended to serve only as a general guide and may need to be modified for unusually severe conditions. A combination of air conditioning and ventilation should not be difficult to design (see Figure 3-1).
Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures 3.2: Unpacking the Chassis w/modules, Digital Mask filter and coupler assembly tightened. Check the front panel thumbscrews that hold the Exciter/Driver Sleds, Amplifier Module and Power Supply Sleds in place are tight. This is especially important after the transmitter has been transported. Thoroughly inspect the chassis with modules and all other materials upon their arrival.
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.
Digital UHF Driver/Transmitter 3.4: AC Input Once the chassis and output connections are in place, connect the AC power cord from the chassis assembly of the driver chassis assembly to an AC outlet The AC input and current requirements for LX Series digital transmitter/drivers are indicated in the Table 3-1 located at the beginning of this chapter. NOTE: This 1000 Watt transmitter is typically requires 220 VAC @ 45 Amps connected to the Driver/Amplifier Cabinet.
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 J21 TB02 J25 J18 TB31 J15 J24 J23 J1 J32 J8 J19 J11 RJ-45 RJ-45 RJ-45 Termination Termination LX Series, Rev.
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 output level is beyond the range of the circuitry. Once the transmitter has been installed and all connections have been made, the process of turning on the equipment can begin. First, verify that AC power is present and connected to the transmitter.
Digital UHF Driver/Transmitter If the Module OK LED is Red and blinking a fault is present. The meaning of the blinking LED is as follows. 1 Blink: Indicates Amplifier Current Fault. 2 Blinks: Indicate Temperature Fault. 3 Blinks: Indicate +32V Power Supply Over Voltage Fault. 4 Blinks: Indicate +32V Power Supply Under Voltage Fault. 5 Blinks: Indicate Reflected Power Fault.
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.
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. The 'CLR' switch is used to clear the displayed previously detected fault that is no longer active.
Digital UHF Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-12: Transmitter Device Parameters Detail Screens System Component Parameter Normal IF Processor Details Upconverter Details System Control Details Driver PA Details Ext. Power Amplifier Modules Details. Will indicate Amp Set and Module within the Set. Will step through each Set and Module. Choice Faulted (Blinking) INPUT SIGNAL STATE MODULATION INPUT IF DLC CONTROL LOCK OK OK MODULATOR 0 - 5.
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.
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.
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.
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.
Digital UHF Driver/Transmitter The power set-back values do not directly correspond to the output power of the transmitter. This completes the Installation, Set Up and Turn On of the Driver/Transmitter. LX Series, Rev. 1 Chapter 3, Site Considerations, Installation and Setup Procedures If a problem occurred during the setup and operation procedures, refer to Chapter 5, Detailed Alignment Procedures, of this manual for more information.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions Chapter 4: Circuit Descriptions NOTE: Information and drawings on the DM8-R Digital Modulator Tray are found in the DM8-R Manual. 4.1.1.1: DM8 Modulator Selected The IF from the DM8 modulator enters the module and the signal is precorrected as needed for amplitude linearity correction, Incidental Carrier Phase Modulation (ICPM) correction and frequency response correction.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions matching pad consisting of R2, R3, and R4 to the pin-diode attenuator circuit consisting of CR1, CR2, and CR3. high is connected to the base of Q2 that is forward biased and creates a current path. This path runs from the -12 VDC line and through red LED DS1, the input level fault indicator, which lights, resistor R54, and transistor Q2 to +12 VDC.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions R69 and R137, and the red LED DS3, input loss indicator, which is illuminated. When Q5 is on, it applies a high to the gate of Q6. This causes it to conduct and apply a modulation loss pull-down output to J42C pin 7C, which is applied to the front panel display on the Control/Monitor module.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions it operate as a wide-band IF amplifier. The output of U1 connects to J40 that is jumpered to J41. The J40 jack is available, as a sample of the precorrection IF for troubleshooting purposes and system setup. The IF signal is connector to a splitter Z1 that has an in phase output and a 90° Quadrature output, which are then connected to the linearity corrector portion of the board.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions The amplitude and phase pre-distorted IF signals are combined by Z2 and connected to J37 that is jumpered to J36 on the board. J37 can be used for testing or monitoring purposes of the IF signal after amplitude and phase predistortion. The pre-distorted IF signal connects through a resistor buffer network that prevents loading of the combiner before it is wired to the frequency response circuitry. 4.1.1.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions therefore increasing its gain maintaining the same output power level. and the LED section of opto-isolator U11. These actions turn on the transistor section of U11 that applies -12 VDC through CR21 to U10A pin 3, and pulls down the reference voltage. This is a fairly slow action controlled by the lowpass filter function of R81 and C61.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions loop circuit. Any error from this comparison is generated in the form of an error current that is converted to a bias voltage that connects to the VCO. This voltage adjusts the output frequency of the VCO until it is on the desired frequency. 4.2.1 (A4) UHF Generator Board (1585-1265; Appendix A) The UHF generator board is mounted in the UHF Generator Enclosure for EMI and RFI protection.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions eighth harmonic of the fundamental frequency (536 MHz to 1056 MHz). The signal is amplified by U6 and U7 to a typical value of from +2 to +4 VDC as measured at TP4. The amplified eighth harmonic is then fed to the SMA RF output jack of the board at J3. Typical output level of the signal is +16 dBm nominal. This output connects through A5 a channel filter to the LO/Upconverter Board. R14.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions RF decoupling components R24, C14, and L4. Inductor L4 is a broadband-RF choke and is resonance free through the UHF band. The amplified RF connects through a pad to the SMA RF output jack J4 and is cabled to (A2) an external channel filter. The reactive channel filter that is externally connected to J4 of the board does not appear as a good 50-Ω load at all frequencies.
Digital UHF Driver/Transmitter balanced, dual feed output that is applied to the push-pull Class A amplifier IC U1. Capacitors C2 and C5 provide DC blocking for the input signal to the IC. The RF outputs of the IC are applied through C3 and C4, which provide DC blocking for the output signals. The RF signals connect to combiner T2 that combines the RF back to a single-RF output at a 50Ω impedance.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions MHz reference signal to pin 6 on U9 for use as the reference in the PLL circuits. 4.2.3.7 Comparator Phase Lock Loop Circuit 4.2.3.5 Internal 10-MHz Reference Circuitry The selected 10-MHz reference connects to pin 6, Oscillator In, of the IC U9. The LO generated by the VCXO located on the UHF Generator Board connects to J1 on the LO/Upconverter Board. A sample of the LO is divided off the main line by R105, R106 and R107.
Digital UHF Driver/Transmitter 3 goes low and is connected to DS1, the Red Unlock LED, which does not lit. Q1 pin 3 low also connects to Q2 that is biased off. The drain of Q2, a high, is wired to J43 pin 15A, the PLL Lock Indicator output of the board. If the 5 kHz from the 10-MHz reference and the 5 kHz from the VCXO become unlocked, out of the capture range of the PLL, pin 12 of U9 goes to a logic low that connects to the base of Q1. This biases On Q1 causing pin 3 to go high.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions the two lines. VR1 connects from J4 to J2, VR2 connects from J4 to J3 and VR3 connects from J2 to J3. and 4. If this circuit is operational, the Green LED DS1, mounted on the board, will be lit +12 VDC Circuits PS2 protects the -12 VDC 2 Amp circuits for the Remote through J62 pins 1, 2, 3 and 4.
Digital UHF Driver/Transmitter used for display of auto test results. A test board is used to execute self test routines. When the test board is installed, Auto_Test_1 is held low and Auto_Test_2 is allowed to float at 5 VDC. This is the signal to start the auto test routines. U3 and U4 are used to selectively enable various input and output ICs found on pages 2 & 3 of the schematic. U1 has two serial ports available.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions Table 4-1: Firmware Configuration Switch SW2 Operating Positions on Schematic Page 3. SETTING SW2-1 SW2-2 SW2-3 SW2-4 SW2-5 SW2-6 SW2-7 SW2-8 Firmware Configuration Switch SW2 (On System Controller code version 4.
Digital UHF Driver/Transmitter the transistor go toward ground potential, reverse biasing the transistor. With the transistor reverse biased, no current through the transistor and LED, therefore the effected LED will not light. A third color, amber, can also be generated by having both transistors conducting, both control lines LOW. The amber color is produced because the current applied to the green element is slightly greater than the red element.
Digital UHF Driver/Transmitter 4.4.1: (A1) 1-Watt UHF Module Assembly (1302891; Appendix A) The 1-watt UHF module assembly provides radio frequency interference (RFI) and electromagnetic interference (EMI) protection, as well as the heatsink, for the 1 watt UHF amplifier board (1302761) that is mounted inside the assembly. The +12-VDC bias voltage connects through J5, a RF-bypassed, feed-through capacitor, to the amplifier board.
Digital UHF Driver/Transmitter Chapter 4, Circuit Descriptions 4.4.3: (A3) RF Amplifier Assembly (1300116; Appendix A) dissipation loads, connect to the reject and reflected ports, J5 and J4, of the coupler. The UHF Module Assembly, 250-watt module (Figure 4-1) is a broadband amplifier for the frequency range 470 to 860 MHz. The amplifier is capable of delivering an output power of 70 Wrms. The amplification is approximately 12 dB. With a typical input of +27dBm an output of +39dBm is expected. 4.4.
Digital UHF Driver/Transmitter PA4 of U4 is a processor operating LED that monitors the +/-12 VDC. PA5 is used to monitor the +12VDC supply to the board. PA6 is the selected channel of analog switch U1. PA7 is connected to a via, V10, for future access. U6 is a serial to RS-485 driver IC. U7 is a watchdog IC used to hold the microprocessor in reset, if the supply voltage is less than 4.21 VDC. U7 momentarily resets the microcontroller if Pin 6 (!ST) is not clocked every second.
Digital UHF Driver/Transmitter resistors of this part but their actual resistance value is not closely defined. A trimming resistor is suggested to give a temperature stability of –200 ppm/C, but instead the microcontroller will determine the exact gain of the circuit and use a correction factor for measurements. Circuit loading components are located in the lower portion of each current monitoring circuit.
Digital UHF Driver/Transmitter 4.5: (A44) Dual Peak Detector Board (1159965; Appendix A) The function of the dual peak detector board is to detect forward and reflected output power samples and generate output voltages that are proportional to the power levels of the sampled signals for use by the control monitoring assembly in the exciter. There are two identical signal paths on the board: one for forward power and one for reflected power.
Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures Chapter 5: Detailed Alignment Procedures 5.1: System Preparation Module replace the two cables to the rear of the exciter/amplifier chassis assembly. The 6/32” x ½” shipping screw does not need to be replaced. It is only used during shipping. If the replacement module does not slide in easily, verify it is properly aligned in the nylon tracks, located on both the top and bottom of the module.
Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures connects through a cable to J6, the modulated IF Input jack, on the rear of the chassis assembly. The digital IF in the chassis assembly connects to the IF Processor module. the ALC screen. Move the MAN/AUTO ALC switch back to Auto, which is the normal operating position. To adjust the AGC Cutback setting, raise the output power of the transmitter to 110%.
Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures stabilizes. Repeat if needed. Re-adjust the AGC ADJ pot as needed until the power level returns to the 100% output power level. With the AGC still in the manual mode and the transmitter at full power, calibrate the Transmitter output metering to 100%.
Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures adjust R10 on the dual peak detector board for a .2VDC, at TB30-13 and TB3012 return, on the terminal block TB30 mounted on the rear of exciter/driver chassis assembly. Next adjust the LED display for 10% reading in the System Reflected Power position. At this 10% reference power reading, a reflected power fault should appear on the System Errors Menu, if the Fault is set at 10% under the set up menu.
Digital UHF Driver/Transmitter Chapter 5, Detailed Alignment Procedures 6 MHz -35 dB -110 dB 3 MHz 6 MHz Figure 5-1: Typical 6 MHz Digital Spectrum There are three Linearity Corrector stage adjustments located on the front panel of the IF Processor Module. The adjustments are threshold settings that are adjusted as needed to correct for any amplitude or phase intermodulation problems.
APPENDIX A INNOVATOR LX SERIES SPECIFICATIONS
Innovator LX LU1000AT Shown Low Power DTV Transmitter 5W - 3kW Designed to provide broadcasters with a product that will meet their needs like no other solution on the market, this new low to medium power transmitter line uses the latest LDMOS devices for broadband operation across the entire UHF band. This allows users to minimize spare parts stock, which is especially important to group owners and networks, and also enables simple and inexpensive channel changes.
Innovator LX Low Power DTV Transmitter 5W - 3kW Performance Options Frequency Range1 470 to 860 MHz Output Impedance 50 Ω Frequency Stability w/Precise Frequency Option ±1kHz (max 30 day variation) ±2Hz Regulation of RF Output Power 3% Dual Exciter with Automatic Switcher AC Surge Protector Precise Frequency Kit Spare Parts Kit 1 Other Frequencies - Consult Factory Measured in 30 KHz RBW, relative to total average power 3 Above 8,500 feet - Consult Factory 2 Out of Band -Compliant with FCC M
APPENDIX B DRAWINGS LIST
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 .......................................................
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 ........................................................................
APPENDIX C TRANSMITTER LOG SHEET
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER DATE READINGS TAKEN Model Number Code Version Firmware Number Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY OUTPUT MEASUREMENTS % FORWARD POWER % REFLECTED POWER DM8 DIGITAL MODULATOR DETAILS MODE SOURCE LINEAR EQ NON-LINEAR EQ (Settings Customized per System) EQL PEAK LEVEL PSF PEAK LEVEL AGC MODE AGC LEVEL D/A PEAK DETECT TAP ENERGY CLIP DETECTOR STATUS AGG ISL D/A HBF IFC COR ODC CODE VERSION IF PROCESSOR DETAILS INPUT SIGNAL STAT
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER INT. 10 MHz IF INPUT LEVEL Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 TEMPERATURE CODE VERSION EXT. PA AMPLIFIER MODULES AMP SET 1 MODULE 1 ONLY IN HIGH POWER SYSTEMS Will indicate Amp Set and Module within the Set. Will step through each Set and Module.
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 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 2 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLEC
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 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 2 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLEC
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 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 2 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLEC
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 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 2 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLEC
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 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 2 POWER SUPPLY VOLTAGE, 32V 32V SUPPLY FORWARD POWER REFLEC
UHF LX Series Digital Transmitter DESCRIPTION OF PARAMETER Appendix C, Log Sheet TRANSMITTER READING FROM LCD DISPLAY 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 Screen, Menu 30-1, on the 4 x 20 Display located on the front of the Control & Monitoring/Power Supply Module.