INSTRUCTION MANUAL (Preliminary) INNOVATOR LX SERIES 1.67 GHz 100W DVB-H 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.
1.67 GHz 100 Watt Single Output Transmitter Chapter 1, Introduction Chapter 1 Introduction 1.1 Manual Overview 1.2 Assembly Designators This manual provides descriptions of the transmitter and associated equipment along with the set up and operating procedures. It is important that you read all of the instructions, especially the safety information in this chapter, before you begin operating the unit.
1.67 GHz 100 Watt Single Output Transmitter 1.3 Safety Chapter 1, Introduction 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. The 1.
1.67 GHz 100 Watt Single Output Transmitter Service Department regardless of whether the item was originally manufactured by Axcera. shipment from Axcera's plant, when operated in accordance with Axcera's operating instructions. This warranty shall not apply to tubes, fuses, batteries, bulbs or LEDs. When equipment is sent to the field on loan, an MRA# is included with the unit. The MRA# is intended to be used when the unit is returned to Axcera.
1.67 GHz 100 Watt Single Output 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.
1.67 GHz 100 Watt Single Output 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.
1.67 GHz 100 Watt Single Output Transmitter Chapter 1, Introduction dBm, dBw, dBmV, dBµ V, & 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.
1.67 GHz 100 Watt Single Output 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.
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1.67 GHz 100 Watt Single Output 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 LL100ATC, Rev. 0 1-9 2.
1.67 GHz 100 Watt Single Output Transmitter Chapter 2, System Description Chapter 2 System Description System Overview The model number scheme for a Innovator LX Series digital transmitter is as follows (where ### = power in watts): The LX Series Innovator digital transmitters are complete 1.67 GHz modular television transmitters that operate at a nominal output power of 50 to 400 watts digital. These systems can be either single output or dual output transmitters.
1.67 GHz 100 Watt Single Output Transmitter Chapter 2, System Description Figure 2-2: Exciter/Driver Chassis, Single, 1.67 GHz, Front View A1 A2 A4 A6 Table 2-1: Exciter/Driver, 1.67 GHz, Modules and Assemblies ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME Exciter Amplifier Chassis Assembly, Single, 1.67 GHz A1 Metering Module A2 Upconverter Module, Single A4 Control/Power Supply Module A6 5 Watt Driver Amplifier Module A11 Backplane Board, 1.67 GHz 2.1 Exciter Amplifier Chassis Assembly, Single, 1.
1.67 GHz 100 Watt Single Output Transmitter signal sent to the front panel sample to allow the operator to monitor the RF signal with his own test equipment. The output of each detector is sent to the Chapter 2, System Description transmitter's system control via the Backplane board into which the assembly plugs. Table 2-2.
1.67 GHz 100 Watt Single Output Transmitter indicator that shows the status of the AGC circuit. Chapter 2, System Description high. When it does so, the Overdrive indicator switches from green to Red. The status of the AGC circuit is controlled by a front panel switch, which can bypass the AGC and operate the pin attenuator with a fixed bias instead of with the AGC circuit. The indicator is normally green when the AGC circuit is enabled, and switches to Amber if the AGC switch is in manual.
1.67 GHz 100 Watt Single Output Transmitter Chapter 2, System Description Table 2-7. Controller/Power Supply Display DISPLAY FUNCTION A 4 x 20 display providing a four-line readout of the internal LCD functions, external inputs, and status. Table 2-8. Controller/Power Supply Status Indicator LED FUNCTION When lit it indicates that the transmitter is in the Operate Mode.
1.67 GHz 100 Watt Single Output Transmitter Chapter 2, System Description Table 2-11. 5 Watt Driver Power Amplifier Status Adjustments POTENTIOMETERS DESCRIPTION FORWARD CAL Adjusts the gain of the Forward Power monitoring circ uit RFL CAL Adjusts the gain of the Reflected Power monitoring circuit Table 2-12. 5 Watt Driver Power Amplifier Status Indicators DISPLAY FUNCTION FWD SAMPLE RF sample of the amplified signal being sent out the module on J25. 2.
1.67 GHz 100 Watt Single Output Transmitter There are also two controls on the front panel used to calibrate the metering of Chapter 2, System Description the forward and reflected power of the PA assembly. Table 2-13. Power Amplifier Status Indicators 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.
1.67 GHz 100 Watt Single Output Transmitter 2.2 Control and Status Chapter 2, System Description discuss the characteristics of each of these modes. The control and status readings of the exciter/driver chassis assembly are found by operating the front panel display screen on the front of the assembly. Operate Mode Operate mode is the normal mode for the transmitter when it is providing RF power output. To provide RF power to the output, the transmitter will not be in mute.
1.67 GHz 100 Watt Single Output Transmitter • dust, dirt, or insects will affect the cooling of the components. This could lead to a thermal shutdown or the premature failure of the affected module. When the front panels of the modules become dust covered, the module should be pulled out and any accumulated foreign material should be removed. Power Amplifier Interlock is high indicating that the amplifier is not installed.
1.67 GHz 100 Watt Single Output Transmitter Chapter 2, System Description Figure 2-3. Exciter/Driver Chassis Assembly Rear View TB30 Table 2-16: LX Series Chassis Assembly Hard Wired Remote Interface Connections to TB30 an 18 pos. Terminal Block Located on the Rear of the Assembly Pin Signal Name Signal Type/Description Designations RMT Transmitter Discrete Open Collector Output - A low indicates TB30-1 State that the transmitter is in the operate mode.
1.67 GHz 100 Watt Single Output Transmitter Signal Name Pin Designations RMT RF System Interlock A TB30-11 RMT RF System Interlock B (Used in dual systems only) TB30-13 RMT Ground TB30-6, 8, 10, 12, 14, 16, and 18 RMT +12 VDC TB30-15 RMT -12 VDC TB30-17 LL100ATC, Rev. 0 Chapter 2, System Description Signal Type/Description When this signal's circuit is completed to ground such as through a wire between TB30-11 and TB30-12, the transmitter A is allowed to operate.
1.67 GHz 100 Watt Single Output Transmitter Chapter 3, Circuit Descriptions Chapter 3 Circuit Descriptions 3.1 (A1) Metering Module Assembly (1304976; Appendix B) This assembly has circuitry that is used to measure the average power of up to four RF inputs. Each RF input is split on the Metering Board, with some of the signal being applied to an average power detector, and the rest of the signal sent to the front panel sample to allow the operator to monitor the RF signal with his own test equipment.
1.67 GHz 100 Watt Single Output Transmitter The board also controls what 10 MHz reference is used by the PLL circuitry of the Upconverter. In normal operation the board uses an external 10 MHz reference, which enters the board at J15B. Its presence is detected with a peak detector that controls a relay. If the external reference is not present, the board switches over to its internal reference U2.
1.67 GHz 100 Watt Single Output Transmitter Chapter 3, Circuit Descriptions 3.3 (A4) Control Monitoring/Power Supply Module, 220 VAC (1305035;Appendix B) the two lines. VR1 connects from J4 to J2, VR2 connects from J4 to J3 and VR3 connects from J2 to J3. The Control Monitoring/Power Supply Module Assembly contains (A1) a Power Protection Board (1302837), (A2) a 600 Watt Switching Power Supply, (A3) a Control Board (1302021), (A4) a Switch Board (1527-1406) and (A5) a LCD Display. 3.3.1.
1.67 GHz 100 Watt Single Output Transmitter PS1 protects the -12 VDC 2 Amp circuits for the System through J63 pins 1, 2, 3 and 4. If this circuit is operational, the Green LED DS1, mounted on the board, will be lit Chapter 3, Circuit Descriptions clocked every second. A manual reset switch S1 is provided but should not be needed. PS2 protects the -12 VDC 2 Amp circuits for the Remote through J62 pins 1, 2, 3 and 4.
1.67 GHz 100 Watt Single Output Transmitter greater than 60 Volt drain to source voltage ratings. Remote digital inputs are diode protected, using CR6, CR7, CR8 and CR9 with a 1 kO pull-up resistor, to +5 VDC. If the remote input voltage is greater than about 2 Volts or floating, the FET is turned on and a logic low is applied to the digital input buffer, U9. If the remote input voltage is less than the turn on threshold of the FET (about 2 VDC), a logic high is applied to the digital input buffer, U9.
1.67 GHz 100 Watt Single Output Transmitter 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.
1.67 GHz 100 Watt Single Output Transmitter This board has two stages of gain and is used to amplify the output of the upconverter module to a point where it can drive up to four 130W amplifier modules. The driver stage Q2 is a single-ended LDMOS transistor, operating Class A. Its’ bias is generated by U4, R64 and their associated components. CR3 provides temperature compensation for the bias. The output of Q2 is applied to the input of the push-pull LDMOS transistor Q1, which is operating Class A.
1.67 GHz 100 Watt Single Output Transmitter In the upper left of Page one, U1 is used to determine where the amplifier control board is located. The four inputs come from the main amp connector and are used to set the SCADA address of the controller. Pull-up resistors, R1-R4 set a default condition of logic high. U6 below and left of U3 is used to control four board mounted status LEDs, ENABLED, DC OK, TEMP and MOD OK all located on the front panel.
1.67 GHz 100 Watt Single Output Transmitter module's heat sink, which is used to monitor the temperature of the heatsink. It connects to J6 pins 1 & 2 on the board and is wired to the comparator IC U13B. If the temperature in amplifier #1 increases above 75°C the output of U13B will go Low that is used as a temperature fault output, which generates a Temperature Fault alert that disables Amplifier #1 3.4.3.4 Schematic Page 3, Forward and Reflected power detector sections of the board.
1.67 GHz 100 Watt Single Output Transmitter controlled output connects to the RF output jack J2 on the board. 3.5.2 (A2) Single Stage Pallet Assembly, 1.67 GHz (1304616; Appendix B) The output of the Phase/Gain Board is connected to the input J3 of (A2) the single stage amplifier assembly. This board has contains a single pushpull LDMOS RF transistor Q1, which is operating Class AB. The bias for Q1 is generated by the 5V regulator Q3, R7 and their associated components.
1.67 GHz 100 Watt Single Output Transmitter desired analog channel of U1 through the settings of PA0-PA2. The outputs of Port A must be set and not changed during an analog input read of channels PA5-PA7. PA3 of U4 is a processor operating LED that monitors the ±12 VDC. PA4 is not used in this configuration. PA5 is the selected channel of analog switch U1. PA6 is used to monitor the +5V digital supply to the board. PA7 is connected to an amp current fault. U2 is a serial to RS-485 driver IC.
1.67 GHz 100 Watt Single Output Transmitter voltage of 60 VDC. The 43.2 kO resistor from pin 5 to ground sets the gain of the amplifier to about 17.28. This value is not set with much accuracy since the manufacturer internally matches the resistors of this part but their actual resistance value is not closely defined.
1.67 GHz 100 Watt Single Output Transmitter filters are tuned at the factory for optimum performance and should not be adjusted. Each of the bandpass filters, manufactured by Myat, is a 1.67 GHz 10 Section Bandpass Filter. The filters are tuned to a 5 MHz bandwidth around 1.6725 MHz. The Bandpass Filter Assemblies are tuned to reject unwanted distortion products generated when the signals are diplexed and also during the amplification process.
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1.67 GHz 100 Watt Single Output Transmitter 4.1 Tuning Procedure Inner Loop Gain setting where power begins to move is 210. Reduce the setting by 21 to 189. 4.1.1 Setting up Manual Gain NOTE: If adjusting the Inner Loop gain causes the power to rise immediately, then the AGC has been running on Inner Loop Gain, not Outer Loop Gain. Go back to step 1, reduce the power to 50%, then go to step 2 and reduce the Inner Loop A Gain until the power stops rising or you have reached 110%, whichever comes first.
1.67 GHz 100 Watt Single Output Transmitter generated when the signals are diplexed and also during the amplification process. Swap the forward and reflected power cables on the transmitter's output coupler. The Bandpass Filter is factory tuned to the proper bandwidth and should not need tuned. If you think tuning is needed consult Axcera Field Support Department before beginning the adjustment. Scroll down to the A Output Power Cal screen. Adjust Power Calibration until meter reads 20%.
APPENDIX A INNOVATOR LX SERIES SPECIFICATIONS
Innovator LX LL400ATC Shown Low Power 1.6 GHz DVB-H Transmitter 50W-400W Designed to provide operators with a product that will meet their needs like no other solution on the market, this new low power transmitter line uses the latest LDMOS devices for operation at 1670 to 1675 MHz. All modules are factory phase and gain matched, easing service and support and allowing users to minimize spare parts stock.
Innovator LX Low Power 1.
APPENDIX B DRAWINGS AND PARTS LISTS
1.67 GHz 100 Watt Single Output Transmitter Appendix B, Drawings and Parts Lists Innovator LX Series 1.67 GHz Digital Transmitter System Chassis Assembly, 220 VAC Exciter, 1.67 GHz Interconnect.................................................................................1305023 Backplane Board, 1.67 GHz Schematic ....................................................................................1304893 Metering Assembly, 1.67 GHz Interconnect Drawing ...................................................
1.67 GHz 100 Watt Single Output Transmitter Appendix B, Drawings and Parts Lists Chassis Assembly, Power Amplifier, LL200ATC LL100ATC AC Harness Chassis/Airbox Interconnect...............................1305882 LL100ATC DC Harness, Chassis/Airbox Interconnect..............................1305885 LL100ATC Coax Assembly Chassis/Airbox Interconnect ..........................1305883 External Amplifier Signal Board Schematic ....................................................................................
