OUSLU50ATD50-Watt UHF Digital Transmitter

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 • [email protected] Digital UHF Driver/Transmitter Table of Contents LX Series, Digital, Rev. 4 March 8, 2007 i 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.........................................................................1-2 1.5 Material Return Procedure......................................................................1-2 1.6 Limited One Year Warranty for Axcera Products........................................1-3 CHAPTER 2 SYSTEM DESCRIPTION & REMOTE CONTROL CONNECTIONS 2.0 System Overview.................................................................................2-1 2.1 (Optional) Exciter Switcher Tray..............................................................2-2 2.2 Exciter Amplifier Chassis Assembly..........................................................2-3 2.2.1 DM8 Modulator Assembly..............................................................2-3 2.2.2 IF Processor Module.....................................................................2-4 2.2.3 VHF/UHF Upconverter Module........................................................2-6 2.2.4 Control & Monitoring/Power Supply Module.....................................2-7 2.2.5 Power Amplifier Module (In 5-50W Transmitters).............................2-8 2.2.6 Or Driver Amplifier Module (In High Power Transmitters)................2-10 2.3 RF Output Assemblies..........................................................................2-12 2.4 Control and Status...............................................................................2-12 2.4.1 Front Panel LCD Display Screen...................................................2-12 2.5 System Operation................................................................................2-12 2.5.1 Principles of Operation................................................................2-12 2.6 Maintenance.......................................................................................2-14 2.7 Customer Remote Connections.......................................................2-14 CHAPTER 3 SITE CONSIDERATIONS, INSTALLATION AND SETUP PROCEDURES 3.1 Site Considerations................................................................................3-1 3.2 Unpacking the Chassis w/Modules...........................................................3-5 3.3 Installing the Chassis w/Modules.............................................................3-5 3.4 AC Input...............................................................................................3-7 3.5 Setup and Operation..............................................................................3-8 3.5.1 Input Connections........................................................................3-8 3.5.2 Initial Turn On.............................................................................3-9 3.5.2.1 DM8 Digital Modulator Module LEDs on Front Panel.................3-9 3.5.2.2 IF Processor Module LEDs on Front Panel...............................3-9 3.5.2.3 VHF/UHF Upconverter Module LEDs on Front Panel.................3-9 3.5.2.4 Controller Module LEDs on Front Panel................................3-10 3.5.2.5 Power Amplifier or Driver Module LEDs on Front Panel..........3-10 3.5.3 Front Panel Screens for the Exciter/Amplifier Chassis Assembly.......3-10 3.5.4 Operational Procedure................................................................3-19 CHAPTER 4 CIRCUIT DESCRIPTIONS 4.0 (Optional) Exciter Switcher Tray..............................................................4-1 4.0.1 Exciter Switcher Control Board.......................................................4-1 4.1 DM8 Digital Modulator Module.................................................................4-1 4.1.1 Digital Modulator, DT1D Board.......................................................4-1 4.1.1.1 SMPTE-310 Input................................................................4-1 Digital UHF Driver/Transmitter Table of Contents LX Series, Digital, Rev. 4 March 8, 2007 ii TABLE OF CONTENTS - (Continued) SECTION PAGE 4.1.1.2 Channel Coder....................................................................4-1 4.1.1.3 Analog Output Section.........................................................4-2 4.1.1.4 Pilot Frequency Generation...................................................4-2 4.1.1.5 Voltage Requirements.........................................................4-2 4.1.2 VSB Front Panel Board..................................................................4-3 4.2 IF Processor Module...............................................................................4-3 4.2.1 IF Processor Board.......................................................................4-3 4.2.1.1 DM8 Modulator Selected......................................................4-3 4.2.1.2 External Modulated IF Selected.............................................4-3 4.2.1.3 Main IF Signal Path (Part 1 of 3)...........................................4-3 4.2.1.4 Input Level Detector Circuit..................................................4-4 4.2.1.5 Pin Diode Attenuator Circuit.................................................4-5 4.2.1.6 Main IF Signal Path (Part 2 of 3)...........................................4-5 4.2.1.7 Amplitude and Phase Pre Correction Circuits..........................4-6 4.2.1.8 Main IF Signal Path (Part 3 of 3)...........................................4-7 4.2.1.9 ALC Circuit......................................…

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Axcera-LU50ATD FCC Type Acceptance Report External Photos April 2007 2-1 2. EXTERNAL PHOTOS 2.1 Front view, complete LU50ATD Transmitter Axcera-LU50ATD FCC Type Acceptance Report External Photos April 2007 2-2 2.2 Rear view, complete Axcera-LU50ATD Transmitter Axcera-LU50ATD FCC Type Acceptance Report External Photos April 2007 2-3 2.3 Side View, Bandpass Filter

Axcera-LU50ATD FCC Type Acceptance Report ID Label/Location Info April 2007 1-1 1. ID LABEL/LOCATION INFO 1.1 Rear Panel FCC Label 1.2 Rear Panel Manufacturer’s Label Axcera-LU50ATD FCC Type Acceptance Report ID Label/Location Info April 2007 1-2 1.3 Rear view, complete Axcera-LU50ATD Transmitter with FCC Label and Manufacturer’s Label

Axcera-LU50ATD FCC Type Acceptance Report Internal Photos April 2007 6-1 6. INTERNAL PHOTOS 6.1 Front view – Chassis Assembly 6.2 Side view – Digital Modulator Assembly Axcera-LU50ATD FCC Type Acceptance Report Internal Photos April 2007 6-2 6.3 Side view - IF Processor Assembly 6.4 Side view – VHF/UHF Upconverter Assembly Axcera-LU50ATD FCC Type Acceptance Report Internal Photos April 2007 6-3 6.5 Side view - Control / Power Supply Assembly 6.6 Side view - Power Amplifier Assembly

Axcera-LU50ATD FCC Type Acceptance Report Operational Description April 2007 8-1 8. OPERATIONAL DESCRIPTION - MODEL Axcera-LU50ATD 8.1 General Description The LU50ATD is a complete 50-watt UHF solid-state, digital transmitter. It operates at a nominal visual output power of 50 watts average. 8.2 Technical Specifications Type of Emission .....................................................................6M00K1D Frequency Range....................... 470 MHz to 860 MHz (any 6-MHz channel) Output Power........................................................... 50 watts average 8.3 Performance Specifications Operating Frequency Range ...................................... 470 MHz to 860 MHz RF output - Nominal: Power ............................................................... 50 watts average Impedance .................................................................... 50 ohms Connector..................................................................... 7/8” EIA Regulation of Output........................................................................ 3% Signal-to-Noise Ratio (SNR) ........................................... 27 dB or better Carrier Frequency Stability.......................................................±1000 Hz Out of Band: Compliant with FCC Mask (Measured in 30 KHz RBW, relative to total average power Channel Edge ± 500 KHz................................................ -47 dB or better 6 MHz Channel Edge .....................................................-110 dB or better Data Interface: Input Rate.................................................... 19.39 Mbps, 6 MHz Channel Input Interface..........................SMPTE 310M, Serial Differential ECL & TTL Electrical Requirements Power Line Voltage................................................... 230 volts, 50/60 Hz Power Consumption ................................................................ 650 watts Environmental Maximum Altitude ..................................................................8,500 feet Operational Temperature Range ...........................................0°C to +50°C Axcera-LU50ATD FCC Type Acceptance Report Operational Description April 2007 8-2 Mechanical Dimensions: Width ..........................................................................22 inches Depth ..........................................................................34 inches Height..........................................................................55 inches Weight ............................................................................ 300 lbs 8.4. System Overview The LU50ATD (1303265) is made up of the trays listed in Table 8-1. Table 8-1. LU50ATD Major Trays and Assemblies MAJOR ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME A1 UHF Exciter Assembly 8.4.1 Exciter Tray 8.4.1.1 DM8 - Digital Modulator Module The DM8 modulator is an ATSC compliant 8 VSB modulator that slides into the left most slot in the Innovator LX Driver chassis assembly. The DM8 modulator accepts a SMPTE- 310 MPEG data stream input and outputs a 6 MHz wide IF output centered at 44 MHz with a pilot carrier at 46.69 MHz. The DM8 modulator provides linear and nonlinear correction capability for the transmission path as well as internal test sources that are used during initial transmitter installation. All of the functions of the DM8 modulator are controlled from the LX Controller LCD display and pushbuttons. 8.4.1.2 IF Processor Module The IF Processor Assembly contains the IF Processor Board (1301977). The IF Processor provides pre-correction to ensure broadcast quality output signal. The pre-correction consists of amplitude linearity correction, Incidental Carrier Phase Modulation (ICPM) correction and frequency response correction. The IF Processor module is configured either for an analog or digital system. Pin 13C of the IF Processor module is grounded in analog systems and left not connected in digital systems. An IF Processor Interlock signal is used to report the presence of the IF Processor module to the Control Monitoring board. If the IF Processor interlock signal is not present, the Pioneer 100 Watt Transmitter/Exciter Driver RF output is Muted (turned off). If an analog IF Processor module is installed and the Modulation Present signal is not true, the Pioneer 100 Watt Transmitter / Exciter Driver output is Muted (turned off). The Control & Monitoring/Power Supply module uses the IF Processor module for System output power control. Through the front panel display or a remote interface, an operator can set the transmitter's RF output power. The range of RF power adjustment is between 0% (full off) and 105% (full power plus). A front panel IF Processor module potentiometer sets the upper limit of RF power at 120%. The system's Control Axcera-LU50ATD FCC Type Acceptance Report Operational Description April 2007 8-3 Monitoring board compares the RF Power Monitoring 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 the digital modulator. RF power control is implemented by changing the DLC voltage provided to the digital modulator. The 'RF High' potentiometer sets the upper adjusted range of RF control circuit output to 120%. The IF Processor module provides a reference ALC voltage to the system's Upconverter. When the ALC voltage decreases, the Upconverter automatically lowers the system output power through the AGC circuits. The IF Processor module has a front panel switch to select Auto or Manual ALC. When Manual ALC is selected, the reference ALC voltage is set by a front panel potentiometer. In this condition, the RF power level control circuit is removed from use. When the ALC select switch is changed to Auto, the RF power level control circuit will start at low power and increase the RF output until the desired output power is attained. The IF Processor mod…

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Axcera-LU50ATD FCC Type Acceptance Report Parts List/Tune-up Info April 2007 7-1 7. PARTS LIST/TUNE-UP INFO 7.1 Parts List The transmitter, can be subdivided as follows: ƒ DM8 - Digital Modulator Module ƒ IF Processor Module ƒ VHF/UHF Upconverter Module ƒ Control & Monitoring / Power Supply Module ƒ Power Amplifier Module 7.2 Tune-up Information The LU50ATD transmitter was aligned at the factory and should not require additional alignments to achieve normal operation. 7.2.1 Exciter Assembly This transmitter takes the IF from the digital modulator and converts the signal to the desired UHF On Channel RF Output at the systems output power level. 7.22 DM8 - Digital Modulator Assembly Note: Not present in Translator systems. The Digital Modulator Assembly has adjustments for video levels and audio modulation levels, and other related parameters. Verify that all red LEDs located on the IF Processor front panel are extinguished. The following details the meaning of each LED when illuminated: • DS1 (input fault) – Indicates that either abnormally low or no IF is present at the input of the module. • DS2 (ALC fault) – Indicates that the ALC circuit is unable to maintain the signal level requested by the ALC reference. This is normally due to excessive attenuation in the linearity signal path or the IF phase corrector signal path, or that switch SW1 is in the Manual ALC Gain position. • DS4 (Mute) – Indicates that a Mute command is present to the system. Switch the transmitter to Standby. The ALC is muted when the transmitter is in Standby. To monitor the ALC, preset R3, manual gain adjust, on the front panel of the Upconverter module, fully CCW. Move switch SW1, Auto/Man AGC, on the front panel of the Upconverter module, to the Manual position. Place the transmitter in Operate. Adjust the ALC GAIN pot on the front panel of the IF Processor to obtain +0.8 VDC on the LCD Display on the Controller/Power Supply in 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%. Adjust R2, AGC Cutback, located on the front panel, CCW until the LED DS1, AGC Cutback, just starts to flash. Return the output power of the transmitter to 100%. Axcera-LU50ATD FCC Type Acceptance Report Parts List/Tune-up Info April 2007 7-2 7.2.3 If Processor Module Assembly On the LCD Display, located on the Controller/Power Supply Module, push the button to switch the transmitter to Operate. The setup of the RF output includes adjustments to the drive level of the Power Amplifier, the adjustment of the linearity and phase pre-distortion to compensate for any nonlinear response of the Power Amplifier on the front panel of the IF Processor module. Verify that all red LEDs located on the IF Processor front panel are extinguished. The following details the meaning of each LED when illuminated: • DS1 (input fault) – Indicates that either abnormally low or no IF is present at the input of the module. • DS2 (ALC fault) – Indicates that the ALC circuit is unable to maintain the signal level requested by the ALC reference. This is normally due to excessive attenuation in the linearity signal path or the IF phase corrector signal path, or that switch SW1 is in the Manual ALC Gain position. • DS4 (Mute) – Indicates that a Mute command is present to the system. Switch the transmitter to Standby. The ALC is muted when the transmitter is in Standby. To monitor the ALC, preset R3, manual gain adjust, on the front panel of the Upconverter module, fully CCW. Move switch SW1, Auto/Man AGC, on the front panel of the Upconverter module, to the Manual position. Place the transmitter in Operate. Adjust the ALC GAIN pot on the front panel of the IF Processor to obtain +0.8 VDC on the LCD Display on the Controller/Power Supply in 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%. Adjust R2, AGC Cutback, located on the front panel, CCW until the LED DS1, AGC Cutback, just starts to flash. Return the output power of the transmitter to 100%. 7.2.4 Linearity Correction Adjustment As shipped, the exciter was preset to include amplitude and phase pre-distortion. The pre- distortion was adjusted to approximately compensate the corresponding non-linear distortions of the Power Amplifier. NOTE: On the IF processor board inside the module the correction enable/disable jumper W12 on J30 must be in the Enable position, on pins 2 & 3. Set up a spectrum analyzer for 30 kHz resolution bandwidth and 30 kHz video bandwidth. Connect the spectrum analyzer to monitor the intermodulation products of the RF output signal of the Power Amplifier. A typical digital spectrum is shown in Figure 5-1. 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. Adjust the top linearity correction adjustment R211 threshold cut in for the in phase amplitude distortion pre- correction that is needed. Next adjust the middle linearity correction adjustment R216 threshold cut in also for the in phase amplitude distortion pre-correction that is needed. Axcera-LU50ATD FCC Type Acceptance Report Parts List/Tune-up Info April 2007 7-3 Finally, adjust the bottom linearity correction adjustment R231 threshold cut in for the quadrature phase distortion pre-correction that is needed. The above pots are adjusted for the greatest separation between the digital signal and the intermodulation at the channel edges. 6 MHz -35 dB -110 dB 3 MHz 6 MHz Typical 6 MHz Digital Spectrum 7.2.5 Frequency Response Delay Equalization Adjustment The procedure for performing a frequency response delay equalization adjustment for the transmitter is described in the following steps: C…

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5 5 4 4 3 3 2 2 1 1 DD CC BB AA Axcera REV ECO DATEAPV TITLE THIS PRINT IS THE PROPERTY OF AXCERA, IT SHALL NOT BE COPIED WITHOUT PERMISSION MATERIAL FINISH DWN CHK REL SCALESHEET REV REV E CO DATE A PV DWG. NO. --- ----- ----- 1303569B0 SCH., 2 WAY SPLITTER/PHASE SHIFTER, UHF (1303567) JKF 11/11/03 B1 OF 1 11/12/03TB 11/12/03TB CHGD CONN. OF U2 & U3. JKF B020111424 6/22/04TB J2 SMA 1 C2 .8-10pF U3 1084607 14 32 C4 .8-10pF J3 SMA 1 NOTE: 1) ALL RESISTORS ARE 1/8W UNLESS OTHERWISE NOTED. 2) ALL CAPACITORS ARE IN uF UNLESS OTHERWISE NOTED. 3) ALL INDUCTORS ARE IN uH UNLESS OTHERWISE NOTED. C1 .8-10pF U1 1084607 14 32 J1 SMA 1 R1 50 40W U2 1084607 14 32 C3 .8-10pF 9 9 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 EE DD CC BB AA Axcera REV ECO DATEAPV TITLE THIS PRINT IS THE PROPERTY OF AXCERA, IT SHALL NOT BE COPIED WITHOUT PERMISSION MATERIAL FINISH DWN CHK REL SCALESHEET REV REV E CO DATE A PV DWG. NO. --- ----- ----- 1159976C0 SCH., DUAL PEAK DETECTOR, SMT (1159965) PJK 2/23/00 B 1 OF 1 2/26/01 LRT2/26/01 LRT ANALOG DIGITAL B0 20092702 6 /11/01 UNCALIBRATED OUTPUT 1 O/P ANALOG (KEY) GND +12V -12V GND GND ANALOG OUTPUT 4 DIGITAL UNCAL. DIGITAL GND OUTPUT 3 GND ANALOG O/P OUTPUT 2 DIGITAL NOTE: TP1 & TP2 ARE PROVIDED FOR FUNCTION TEST PURPOSES ONLY, AND ARE ACCOMPLISHED BY ADDING VIA HOLE TO TOP OF PCB. REMOVED C 2, C4, L1, L2, CR3, AND C R4. R25 AND R 26 WERE 470K. R7 AND R8 WERE 2.2K. C7 A ND C8 WERE .0 01. ADDED J8, J9, W3, W4, R27-R 30. (PJK) LRT C0 20110722 3/4W 3/4W 3/4W 3/4W ADDED C2 & C4. J KF LRT 5 /16/03 W2 C16 300pF C4 .001 L6 .47 uH C12 300pF J6 1 2 3 R27 100K R24 100 R8 100K L10 .47 uH CR1 5082-2811 J7 1 2 3 R29 100K L5 .47 uH R19 1K C2 .001 R20 10K 1 2 3 J5 J9 1 2 3 R16 100 C8 .47 C11 300pF R15 100 R2 100 C10 300pF L4 .47 uH C7 .47 CR2 5082-2811 L7 .47 uH W3 C13 300pF L8 .47 uH C14 300pF R23 100 L9 .47 uH C3 100pF R1 100 1 2 3 J4 C15 300pF R4 100 R28 100K R17 100 R18 100 R26 2.2K J8 1 2 3 J1 J2 11 12 10 9 5 6 4 3 8 7 2 1 J3 - + U1C 8 9 10 + - U1D 12 13 14 C1 100pF R7 100K W1 1 2 3 CW R10 10K TP1 R25 2.2K TP2 1 2 3 CW R9 10K R3 100 W4 + - U1A 15906221 1 2 3 4 11 C5 0.1 uF + - U1B 5 6 7 R21 1K R30 100K R22 10K C6 0.1 uF L3 .47 uH C9 300pF

55 44 33 22 11 D D C C B B A A Axcera REV ECO DATE APV TITLE THIS PRINT IS THE PROPE RTY OF AXCERA, IT SHALL NOT BE COPIED WITHOUT PERMISSION MATERIAL FINISH DWN CHKREL SCALE SHEET REV REV ECO DATEAPV DWG. NO. --- ---------- 1305940 B0 SCH., 8 VSB FRONT PANEL BD., LX (1305939) JKF 4/8/05 B1 OF 1 4/8/05 LAJ 4/8/05 LAJ POWER MPEGPLL APLL B RS-232 POWER MPEGPLL APLL BCOMKEY TX RX COM TX RX COM PLL B UNLOCKEDPLL A UNLOCKED MPEG NOT PRESENT KEY (NOT USED) (NOT USED) B0 20111868 ADDED R1, R2 & R3. ADDED"NOT USED" TO DS1 & J3. (CR) 11/15/05 LAJ J3 1234 GREEN RED DS4 R2 1K GREEN RED DS1 R3 1K GREEN RED DS2 R1150 J2 123456789 10 GREEN RED DS3 J1 123456789

Axcera

FCC TYPE ACCEPTANCE REPORT LU50ATD 50 WATT DIGITAL UHF 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 • [email protected]

Axcera-LU50ATD FCC Type Acceptance Report Table of Contents Aril 2007 TABLE OF CONTENTS CHAPTER 1 ID LABEL/LOCATION INFO 1.1 Rear Panel FCC Label ........................................................................... 1-1 1.2 Rear Panel Manufacturer's Label ............................................................ 1-1 1.3 Rear view, Axcera-LU50ATD Transmitter w/FCC Label .............................. 1-2 CHAPTER 2 EXTERNAL PHOTOS 2.1 Front view, Axcera-LU50ATD Transmitter ............................................... 2-1 2.2 Rear view, Axcera-LU50ATD Transmitter ................................................ 2-2 2.3 Side view, Band-pass Filter ................................................................... 2-3 CHAPTER 3 SCHEMATICS CHAPTER 4 TEST REPORT 4.1 RF Power Measurements ...................................................................... 4-1 4.2 Modulation Characteristics .................................................................... 4-2 4.3 Error Vector Magnitude (EVM) and Signal to Noise Ratio (SNR) ................. 4-3 4.4 Frequency Response and Group Delay.................................................... 4-4 4.5 Peak to Average .................................................................................. 4-4 4.6 Phase Noise ........................................................................................ 4-5 4.7 Occupied Bandwidth ............................................................................ 4-6 4.8 Conducted Spurious Emissions .............................................................. 4-7 4.9 Radiated Emissions.............................................................................4-14 4.10 Frequency Stability ...........................................................................4-16 4.10.1 Pilot Frequency Measurement....................................................4-18 4.11 Test Equipment ................................................................................4-19 CHAPTER 5 USER'S MANUAL CHAPTER 6 INTERNAL PHOTOS 6.1 Front view, Chassis Assembly ............................................................... 6-1 6.2 Side view, Digital Modulator Assembly ................................................... 6-1 6.3 Side view, IF Processor Assembly .......................................................... 6-2 6.4 Side view, VHF/UHF Upconverter Assembly ............................................ 6-2 6.5 Side view, Control / Power Supply Assembly .......................................... 6-3 6.6 Side view, Power Amplifier Assembly ..................................................... 6-3 CHAPTER 7 PARTS LIST/TUNE-UP INFO 7.1 Parts List ........................................................................................... 7-1 7.2 Tune-up Information ........................................................................... 7-1 7.2.1 Exciter/Amplifier Chassis Assembly ............................................... 7-1 7.2.2 DM8 - Digital Modulator Module Assembly ..................................... 7-1 7.2.3 IF Processor Module Assembly ..................................................... 7-2 7.2.4 Linearity Correction Adjustment ................................................... 7-2 7.2.5 Frequency Response Delay Equalization Adjustment ....................... 7-3 7.2.6 Calibration of the Transmitter Forward Output Power Level .............. 7-3 7.2.7 Calibration of the Transmitter Reflected Output Level ...................... 7-4 7.2.8 Bandpass Filter Assembly ............................................................ 7-4 Axcera-LU50ATD FCC Type Acceptance Report Table of Contents Aril 2007 CHAPTER 8 OPERATIONAL DESCRIPTION - MODEL Axcera-LU500ATD 8.1 General Description ....................................................................... 8-1 8.2 Technical Specifications.................................................................. 8-1 8.3 Performance Specifications ............................................................. 8-1 8.4 System Overview.......................................................................... 8-2 8.4.1 Exciter Tray ........................................................................ 8-2 8.4.1.1 DM8 - Digital Modulator Module .................................... 8-2 8.4.1.2 IF Processor Module .................................................... 8-2 8.4.1.3 VHF/UHF Upconverter Module ....................................... 8-3 8.4.1.4 Control & Monitoring / Power Supply Module .................. 8-4 8.4.1.5 Power Amplifier Module ................................................ 8-4 8.5 Control and Status ........................................................................ 8-6 8.5.1 Exciter Tray......................................................................... 8-6 8.6 Input and Remote Connections ....................................................... 8-9 8.6.1 Remote Interface Connections .............................................. 8-9 8.7 AC Input .........................................................................8-10 8.7.1 Exciter Tray........................................................................8-10 8.8 System Operation ............................................................8-10 8.8.1 Principles of Operation .........................................................8-10 CHAPTER 9 CERTIFICATION OF TEST DATA TRAK SYSTEMS MODEL 8821 DATASHEET ...................................... SHEET 1 TRAK SYSTEMS MODEL 8821 DATASHEET ...................................... SHEET 2 CRYSTEK CORP. DATASHEET ........................................................ SHEET 1

Axcera – LU50ATD Type Acceptance Report Test Report April 2007 4-1 4. TEST REPORT 4.1 RF Power Measurements Figure 4-1 shows the test equipment setup for the RF power measurements. Figure 4-1. Test Equipment Setup for RF Power Measurements The output power of the LU50ATD was adjusted to obtain 50 watts average RF output as observed on the power meter. Measured Power: +7 dBm Coupling Loss: -40.0 dB Power: +47.0 dBm Power = 50 Watts With the power level properly set to 50 watts average, all required tests were performed and recorded in the following sections. LU50ATD Transmitter Hewlett Packard Power Meter Bird Model 8892-300 50 Ohm Termination Connecticut Microwave Directional Coupler RFA300 Test Meas. Set HP Spectrum Anaylzer Bandpass Filter Device Under Test Axcera – LU50ATD Type Acceptance Report Test Report April 2007 4-2 4. 2 Modulation Characteristics The modulator module incorporates a modulation technique known as 8-Level Vestigial Side-band (8-VSB), which uses a layered digital architecture and a single carrier frequency. A pilot tone is provided, to allow rapid acquisition of the signal by receivers. The 8-VSB system transmits a serial data bit stream at a rate of 19.4 Mbps in a 6 MHz television channel. This type of transmission is far less susceptible to propagation impairments such as multi-path, noise and interference as compared to analog transmissions. Figure 4-2. Typical Demodulation Test Setup LU50ATD Transmitter Bandpass Filter Connecticut Microwave Directional Coupler 50 Ohm Termination HP 89441A Vector Signal Analyzer 20 dB Attenuator Laptop Computer Device Under Test RFA 300 Test Measurement Set Axcera – LU50ATD Type Acceptance Report Test Report April 2007 4-3 4. 3 Error Vector Magnitude (EVM) and Signal to Noise Ratio (SNR) The Hewlett Packard Vector Signal Analyzer and Tektronix RFA 300 were used to measure that the un-equalized patterns are within the ATSC/FCC EVM limit of 4% and SNR limit of 27db. Figure 4-3. Constellation Diagram Axcera – LU50ATD Type Acceptance Report Test Report April 2007 4-4 4. 4 Frequency Response and Group Delay Figure 4-4. Frequency Response and Group…

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