HFLTMU925UHF DTV ATSC 1KW TO 2.5 KW TRANSMITTER FAMILY

R&S ® TMU9 Transmitter System System Manual System Manual (J0ÄG2) 2600.5423.02 ─ 01 Broadcasting © 2012 Rohde & Schwarz GmbH & Co. KG Muehldorfstr. 15, 81671 Munich, Germany Phone: +49 89 41 29 - 0 Fax: +49 89 41 29 12 164 E-mail: [email protected] Internet: http://www.rohde-schwarz.com Printed in Germany – Subject to change – Data without tolerance limits is not binding. R&S ® is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners. The following abbreviations are used throughout this manual: R&S ® XYZ1234 is abbreviated as R&S XYZ1234 KONFORMITÄTSERKLÄRUNG gemäß dem Gesetz über Funkanlagen und Telekommunikationsendeinrichtungen (FTEG) und der Richtlinie 1999/5/EG (R&TTE) Anhang V, zertifiziert durch die Benannte Stelle CETECOM ICT Services GmbH, Kennnummer 0682. DECLARATION OF CONFORMITY in accordance with the Radio and Telecommunications Terminal Equipment Act (FTEG) and Directive 1999/5/EC (R&TTE Directive) Annex V, certified by the Notified Body CETECOM ICT Services GmbH Germany, Identif. No. 0682. ROHDE & SCHWARZ GmbH & Co. KG Mühldorfstr. 15, D-81671 München München, den 26. Oktober 2012 Zentrales Qualitätsmanagement GF-QP / Radde Munich, 2012-10-26 Central Quality Management GF-QP / Radde CE D/E-1 Vorlage: 2012_55_TMU9.doc 3573.7015.05 / ÄI 01.00 Z ertifikat-Nr.: / Certificate No.: 2012-55 Hiermit wird in alleiniger Verantwortung bescheinigt, dass die Funkanlage We herewith certify under our sole responsibility that the radio equipment Gerätetyp Equipment Type Benennung Designation TMU9 Mittelleistungssender / Medium Power Transmitter Geräteklasse: / Equipment class: 2.10 (Broadcast transmitter) bei bestimmungsgemäßer Verwendung den grundlegenden Anforderungen des § 3 und den übrigen einschlägigen Bestimmungen des FTEG (Artikel 3 der R&TTE) entspricht. complies with the essential requirements of §3 and the other relevant provisions of the FTEG (Article 3 of the R&TTE Directive), when used for its intended purpose. • Gesundheit und Sicherheit gemäß § 3 (1) 1, (Artikel 3 (1) a)) • Health and safety requirements pursuant to § 3 (1) 1, (Article 3(1) a)) • Schutzanforderungen in Bezug auf die elektromagn. Verträglichkeit § 3 (1) 2, (Artikel 3 (1) b)) • Protection requirements concerning electromagnetic compatibility § 3(1)(2), (Article 3(1)(b)) • Maßnahmen zur effizienten Nutzung des Funkfrequenzspektrums § 3 (2), (Artikel 3(2)) • Measures for the efficient use of the radio frequency spectrum § 3 (2), (Article 3(2)) • Luftschnittstelle bei Funkanlagen gemäß § 3(3), (Artikel 3(3)) • Air interface of the radio systems pursuant to § 3(3), (Article 3(3)) Angewendete harmonisierte Normen: Harmonized standards applied: EN 60950-1: 2006 ETSI EN 301489-1 V1.9.2 (2011-09) ETSI EN 301489-14 V1.2.1 (2003-05) ETSI EN 302296 V1.1.1 (2005-01) EN 61000-3-2: 2006 +A1 +A2 EN 61000-3-3: 2008 Einhaltung der grundlegenden Anforderungen auf andere Art und Weise (hierzu verwendete Standards/Spezifikationen): Other means of proving conformity with the essential requirements (standards/specifications used): Reg TP SSB RU 005 Rec.1999/519/EG; 26. BImSchV KONFORMITÄTSERKLÄRUNG gemäß dem Gesetz über Funkanlagen und Telekommunikationsendeinrichtungen (FTEG) und der Richtlinie 1999/5/EG (R&TTE) Anhang V, zertifiziert durch die Benannte Stelle CETECOM ICT Services GmbH, Kennnummer 0682. DÉCLARATION DE CONFORMITÉ selon la loi sur les équipements radio et les équipements terminaux de télécommunications (FTEG) ainsi que selon la Directive 1999/5/CE (Directive R&TTE) Annexe V, certifié par l'Organisme Notifié CETECOM ICT Services GmbH Allemagne, numéro d'identification 0682. ROHDE & SCHWARZ GmbH & Co. KG Mühldorfstr. 15, D-81671 München München, den 26. Oktober 2012 Zentrales Qualitätsmanagement GF-QP / Radde Munich, le 2012-10-26 Gestion centrale de la qualité GF-QP / Radde CE D/F-1 Vorlage: 2012_55_TMU9.doc 3573.7015.05 / ÄI 01.00 Z ertifikat-Nr.: / Certificat N° : 2012-55 Hiermit wird in alleiniger Verantwortung bescheinigt, dass die Funkanlage Par la présente, nous certifions sous notre responsabilité exclusive que l'équipement radio Gerätetyp Equipment Type Benennung Designation TMU9 Mittelleistungssender / Émetteur moyenne puissance Geräteklasse: / Classe d'équipement : 2.10 bei bestimmungsgemäßer Verwendung den grundlegenden Anforderungen des § 3 und den übrigen einschlägigen Bestimmungen des FTEG (Artikel 3 der R&TTE) entspricht. est conforme aux prescriptions fondamentales du paragraphe 3 et aux autres prescriptions applicables de la loi susmentionnée (Article 3 de la Directive R&TTE), à condition qu'il soit utilisé dans les conditions stipulées. • Gesundheit und Sicherheit gemäß § 3 (1) 1, (Artikel 3 (1) a)) • Prescriptions en matière de sécurité et de santé selon le paragraphe 3 (1) 1, (Article 3 (1) a)) • Schutzanforderungen in Bezug auf die elektromagn. Verträglichkeit § 3 (1) 2, (Artikel 3 (1) b)) • Prescriptions en matière de protection relative à la compatibilité électromagnétique selon le paragraphe 3 (1) (2) (Article 3 (1) b)) • Maßnahmen zur effizienten Nutzung des Funkfrequenzspektrums § 3 (2), (Artikel 3(2)) • Mesures pour l'utilisation efficace du spectre radioélectrique le paragraphe 3 (2), (Article 3(2)) • Luftschnittstelle bei Funkanlagen gemäß § 3(3), (Artikel 3(3)) • Interface radio des équipements radio selon le paragraphe 3 (3) (Article 3 (3)) Angewendete harmonisierte Normen: Normes harmonisées utilisées : EN 60950-1: 2006 ETSI EN 301489-1 V1.9.2 (2011-09) ETSI EN 301489-14 V1.2.1 (2003-05) ETSI EN 302296 V1.1.1 (2005-01) EN 61000-3-2: 2006 +A1 +A2 EN 61000-3-3: 2008 Einhaltung der grundlegenden Anforderungen auf andere Art und Weise (hierzu verwendete Standards/Spezifikationen): Autres moyens servant à établir la conformité aux prescriptions fondamentales (normes/spécifications utilisées) : Reg TP SSB RU 005 Rec.1999/519/EG; 26. BImSchV 2101.6093.54 - EU - D/E-2 Für Betrieb im Europäischen Wirtschaftsraum (EWR) und zivilem Einsatz. Hinwei…

Text truncated - open the document above for the full version.

Transmitter System R&S TMU9 R&S ® TMU9 58System Manual 2600.5423.02 ─ 01 trays. When routing in solid cable ducts, use the next largest cable cross-sections and fuse ratings. The fuse ratings apply for a maximum ambient temperature of 25 °C and a minimum undervoltage of 197 V AC. Series fuses and cable cross-sections for a 3-phase power supply For a 230/400 V AC, 50 Hz power supply with L1, L2, L3, N, and PE, the following infor- mation applies: Number of amplifiersSeries fuse pH gGCable cross-section 13 x 40 A 5 x 6 mm 2 23 x 40 A 5 x 6 mm 2 33 x 40 A 5 x 6 mm 2 43 x 40 A 5 x 6 mm 2 53 x 40 A 5 x 6 mm 2 63 x 40 A 5 x 6 mm 2 Series fuses and cable cross-sections for a 1-phase power supply For a 230 V AC, 50 Hz power supply with L1, N, and PE, the following information applies: Number of amplifiersSeries fuse NH gGCable cross-section 13 x 40 A 3 x 6 mm 2 23 x 40 A 3 x 6 mm 2 33 x 50 A 3 x 10 mm 2 1. Run a power input cable of sufficient length to the series fuse. 2. Connect the cable to the series fuse. 3. Loosen the clamping screws at the strain relief (item 1 in the following figure). 4. Run a cable from the series fuse through the strain relief to the power input terminal X1 (item 3). 5. Remove the protective covers (item 2), open the respective terminals using a size 3 flat-head screwdriver, and connect the wires using the cable and terminal designa- tions. 6. Check that the wires are secure and put the protective covers (item 2) back on. 7. Tighten the clamping screws of the strain relief. 8. Fasten the transparent protective cover to the rear of the mains distribution unit. Installation R&S TMU9 Transmitter System R&S TMU9 R&S ® TMU9 59System Manual 2600.5423.02 ─ 01 Fig. 3-13: Connecting the Power Input Cable 1 = Strain relief 2 = Protective covers 3 = Power input terminal X1 3.2.7Installing the RF output The output to the main antenna is an EIA connector. It is on the left-hand side of the transmitter roof, next to the directional coupler and connection panel. 3.2.7.1Connecting the Antenna Connect the antenna as follows, depending on the transmitter type: ► Fasten the coaxial cable, which is preassembled to the station, to the EIA flange of the transmitter's RF output. To prevent the screw connection from loosening, secure it using a plain washer and spring lock washer. ● Use 4 screws M8, 35 mm (for EIA 1 5/8") In regions with high humidity, the supplied rubber ring can be inserted into the groove between the two EIA flanges. 3.2.7.2Connecting the Dummy Antenna The dummy antenna is connected only when putting the system into operation or for maintenance and repair purposes. Installation R&S TMU9 Transmitter System R&S TMU9 R&S ® TMU9 60System Manual 2600.5423.02 ─ 01 With some dummy antennas that have coolant monitoring and overtemperature moni- toring, the monitoring equipment can be connected to the transmitter. The main RF carrier loop X41.1 and X41.2 on the CAN bus adapter or exciter switch can be used here as a temporary measure (e.g. while the unit is being put into operation). 1. To connect the main RF carrier loop, use the inserted jumper plug and remove the jumper. 2. Connect the monitoring cable in place of the jumper. If you are using an RF patch panel that allows you to switch between the antenna and dummy antenna by means of an RF bridging link (permanent installation), attach the dummy antenna monitoring unit to the standby RF carrier loop (X41.1 and X41.2 with CAN bus adapter, X41.3 and X41.4 with exciter switch). For more details, see ​chap- ter 3.2.9, "Installing the RF Loop", on page 62. 3.2.8Installing R&S TCE900 Customer Interfaces The various versions of the TCE900 are already integrated into the rack with the delivery of a transmitter. Installation is limited to wiring at the device's customer interfaces. Which cables need to be connected depends on the transmitter configuration, the device version and the custom requirements. The cables used to provide ASI, 10MHz, PPS and GPS signals, should be double shiel- ded. IP and Ethernet connections should use class CAT6 cables should be used. Please refer to the system circuit diagram for the system wiring applicable to your system. The following steps are required to install a R&S TCE900. 1. Insert the R&S TCE900 into the TCE pull‑out frame without canting it (only one run- ner) and carefully push the unit back to the front stop. 2. Fasten the R&S TCE900 to the TCE pull‑out frame using the two knurled screws. 3. Connect the cable in accordance with the wiring diagram and target designation. 4. Complete the TCE pull‑out frame with the front panel a) To connect the Tx Control or Exciter A (for single drive) and TSP, plug the control cable into the mini USB socket on the TSP900. b) Hook the eyelets on the rear of the front panel into the hooks on the TCE pull-out frame and press the front panel down as far as it will go. c) Retighten the front panel to the sides of the TCE pull-out frame using four screws (size 20 Torx screwdriver). 5. Slide the TCE pull-out frame into the rack. Installation R&S TMU9 Transmitter System R&S TMU9 R&S ® TMU9 61System Manual 2600.5423.02 ─ 01 a) Push the left safety lever outwards and press one of the two right safety levers downwards. Fig. 3-14: Releasing the safety lever (left side). 1 = Push the safety lever outward and hold it Fig. 3-15: Releasing the safety lever (right side). 2 = Press down and hold the first safety lever 3 = Push the TCE pull-out unit toward the rack 4 = Push the second safety lever downwards, hold it, and push the TCE pull-out unit in all the way b) First hold the two safety levers in this position and press the TCE pull-out frame toward the rack, until the safety lever retains its position on its own. c) Also push the second safety lever on the right side downwards now and slide the TCE pull-out unit into the rack. d) Retighten the four captive screws on the TCE pull-out frame. Installation R&S TMU9 Transmitter System R&S TMU9 R&S ® TMU9 62System Manual 2600.5423…

Text truncated - open the document above for the full version.

June 10, 2014 Federal Communications Commission Office Of Engineering Technology To Whom It May Concern: ATTESTATION STATEMENT I hereby certify the measurements were executed and test results were recorded in accordance with accepted engineering practices and do constitute an accurate representation of the product performance of the documented TMU9 transmitter. President Greg Best Consulting, Inc. 9223 N. Manning Ave. Kansas City, MO 64157 816-792-2913

Splitter Combiner & LPF Amp 1 Emission Mask Filter Amp “N” N=2 to 5 RF Out Exciter Transmitter Block Diagram

June 10, 2014 CONFIDENTIALITY REQUEST LETTER TMU9 TRANSMITTER TECHNICAL DATA Pursuant to FCC 0.457(d) and 0.459 of the FCC Rules we are requesting long- term confidentiality due to the fact that the applicant, Rohde & Schwarz, considers certain information to be submitted as trade secret information. Specifically, the schematics and parts lists submitted as exhibits for type certification for the above transmitter are not normally available to anyone outside of company employees. The specific files needing confidentiality are identified as: TMU925 Part list.pdf TCE900 Ctrl Sys part list.pdf TDU900 Part List.pdf TM9-T1 Ampl Kit Part List.pdf TMU9-T2 RF Kit Top Part List.pdf TMU9-T8 Power Coupler Part List.pdf ZR900Z10 Power Distribution Part List.pdf PMU901 Schematics.pdf TCE900 Schematics.pdf TMU9 Combiner Schematics.pdf TMU9 Configuration Diagrams.pdf TMU9 Mains Distribution.pdf The company has gone to great expense to develop the equipment and they could be financially harmed if another competitor were to copy the products using the schematics and parts list information and make them available for sale. The parts lists and schematic information are not supplied with customer documentation. Because of the nature of the schematics and parts lists, redacted documents are not possible. At a minimum, a period of 5 years is necessary for confidentiality for these documents. Regards, Greg Best Consulting, Inc. 9223 N. Manning Ave. Kansas City, MO 64157 816-792-2913

FCC label

OPERATIONAL DESCRIPTION The R & S model TMU9 transmitter is composed of multiple modules housed in a single rack cabinet including the final emission mask filter. The transmitter rack houses one or more exciters , a control unit, one or more amplifiers operating in parallel, splitter and combiner unit, emission mask filter, cooling system, and output harmonic filter. Transmitter configurations include a 2 amplifier, 3 amplifier, 4 amplifier, and 5 amplifier systems. The exciter unit accepts the transport stream input signal and converts this to an ATSC RF modulated signal. The exciter includes signal processing to improve transmitter linearity performance and frequency response as well as compensating for frequency response issues in the transmission system beyond the transmitter before it reaches the antenna. If dual exciters are used, an exciter switcher is used to select which exciter is routed to the rest of the transmitter. After the exciter, the signal is split and directed to one or more amplifiers operating in parallel. Here the modulated ATSC signal is amplified. A combiner is used to combine the signal from each of the amplifiers and then the signal is routed to a harmonic filter and an emission mask filter to reduce harmonic energy and to ensure adjacent channel emission is compliant with FCC rules. The control unit interfaces with each subsystem within the transmitter and provides monitoring of each function, implements automatic power control, communicates with any remote control system, and provides fault protection for the transmitter. An optional touchscreen display is available. The cooling system contains the fans necessary to properly cool all components within the transmitter and interfaces with the control system for proper operation.

R&S ® Tx9 Transmitter System Operating Manual Operating Manual (E9é:2) 2109.9110.02 ─ 07 Broadcasting © 2014 Rohde & Schwarz GmbH & Co. KG Mühldorfstr. 15, 81671 München, Germany Phone: +49 89 41 29 - 0 Fax: +49 89 41 29 12 164 E-mail: [email protected] Internet: www.rohde-schwarz.com Subject to change – Data without tolerance limits is not binding. R&S ® is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners. The following abbreviations are used throughout this manual: R&S ® XYZ1234 is abbreviated as R&S XYZ1234. Sehr geehrter Kunde, Sie haben sich für den Kauf eines Rohde & Schwarz Produk- tes entschieden. Sie erhalten damit ein nach modernsten Fer- tigungsmethoden hergestelltes Produkt. Es wurde nach den Regeln unserer Qualitäts- und Umweltmanagementsysteme entwickelt, gefertigt und geprüft. Rohde & Schwarz ist unter ande- rem nach den Managementsys- temen ISO 9001 und ISO 14001 zertifiziert. Der Umwelt verpflichtet ❙Energie-effiziente, RoHS-konforme Produkte ❙Kontinuierliche Weiterentwicklung nachhaltiger Umweltkonzepte ❙ISO 14001-zertifiziertes Umweltmanagementsystem Dear customer, You have decided to buy a Rohde & Schwarz product. This product has been manufactured using the most advanced meth- ods. It was developed, manufac- tured and tested in compliance with our quality management and environmental manage- ment systems. Rohde & Schwarz has been certified, for exam- ple, according to the ISO 9001 and ISO 14001 management systems. Environmental commitment ❙Energy-efficient products ❙Continuous improvement in environmental sustainability ❙ISO 14001-certified environmental management system Cher client, Vous avez choisi d’acheter un produit Rohde & Schwarz. Vous disposez donc d’un produit fabriqué d’après les méthodes les plus avancées. Le dévelop- pement, la fabrication et les tests de ce produit ont été effec- tués selon nos systèmes de management de qualité et de management environnemental. La société Rohde & Schwarz a été homologuée, entre autres, conformément aux systèmes de management ISO 9001 et ISO 14001. Engagement écologique ❙Produits à efficience énergétique ❙Amélioration continue de la durabilité environnementale ❙Système de management environnemental certifié selon ISO 14001 Certified Environmental System ISO 14001 Certified Quality System ISO 9001 Quality management and environmental management 1171.0200.11 V 05.01 1171020011 ISO-Qualitaets-Zertifikat_1171-0200-11_A4.indd 128.09.2012 10:25:08 1171.0200.22-06.00 Customer Support Technical support – where and when you need it For quick, expert help with any Rohde & Schwarz equipment, contact one of our Customer Support Centers. A team of highly qualified engineers provides telephone support and will work with you to find a solution to your query on any aspect of the operation, programming or applications of Rohde & Schwarz equipment. Up-to-date information and upgrades To keep your instrument up-to-date and to be informed about new application notes related to your instrument, please send an e-mail to the Customer Support Center stating your instrument and your wish. We will take care that you will get the right information. Europe, Africa, Middle East Phone +49 89 4129 12345 [email protected] North America Phone 1-888-TEST-RSA (1-888-837-8772) [email protected] Latin America Phone +1-410-910-7988 [email protected] Asia/Pacific Phone +65 65 13 04 88 [email protected] China Phone +86-800-810-8228 / +86-400-650-5896 [email protected] Contents R&S ® Tx9 3Operating Manual 2109.9110.02 ─ 07 Contents 1 Information about this Manual..............................................................9 2 Safety Instructions...............................................................................11 2.1Safety Instructions for Transmitter Systems and Equipment................................11 2.2General Safety Instructions.......................................................................................12 2.2.1 Safety Instructions.........................................................................................................12 2.3Special Hazard Information........................................................................................19 2.3.1 Hazards from AC Supply Voltage................................................................................. 19 2.3.1.1 AC Power Supply..........................................................................................................19 2.3.1.2 Changing Fuses............................................................................................................19 2.3.2 Hazards from High‑Energy Electric Circuits..................................................................19 2.3.3 Hazards from RF Radiation...........................................................................................20 2.3.3.1 Obligation to Instruct Personnel....................................................................................20 2.3.3.2 RF Shielding..................................................................................................................20 2.3.3.3 Rules When Operating an Amplifier..............................................................................20 2.3.3.4 Rules When Working on an Open Amplifier..................................................................21 2.3.4 Conditions for Assembly Work on Cooling System.......................................................21 2.3.5 Safety Data Sheets for Hazardous Substances............................................................22 3 Introduction to Operation....................................................................23 3.1Operation via R&S TDU900........................................................................................23 3.1.1 Opening Display.....................................................................…

Text truncated - open the document above for the full version.

1 ROHDE & SCHWARZ MODEL TMU9 ATSC TRANSMITTER TECHNICAL REPORT TABLE OF CONTENTS PAGE Introduction 2 Test Equipment Configuration 3 3-5 Power Amplifier Transmitter Measurements – 2500 Watts 4 Emission Mask Compliance Measurements – 2500 Watts 5 Frequency Stability Measurements 20 Cabinet Radiation Measurements 21 RF Output Power Measurements – 800 Watts 24 Emission Mask Compliance Measurements – 800 Watts 25 2 Power Amplifier Transmitter Measurements 33 RF Output Power Measurements – 1000 Watts 33 Emission Mask Compliance Tests – 1000 Watts 33 RF Output Power Measurements – 250 Watts 41 Emission Mask Compliance Tests – 250 Watts 41 Test Equipment 49 Summary and Conclusion 49 Greg Best Consulting, Inc. 9223 N. Manning Ave. Kansas City, MO 64157 816-792-2913 2 TMU925 TRANSMITTER TECHNICAL REPORT The following information is provided to support the technical performance of the R & S TMU9 DTV transmitter. The information is supplied for broadcast service according to applicable portions of Part 74 of the FCC Rules. The information in this report is provided in support of certification that four transmitter configurations meet the appropriate requirements. The transmitter configurations are exactly the same except for the number of power amplifiers that are combined. The models submitted are: 5 power amplifiers that produce 2.5 kW, 4 power amplifiers that produce 2.0 kW, 3 power amplifiers that produce 1.5 kW, and 2 power amplifiers that produce 1.0 kW. The transmitter configurations employing 3-5 power amplifiers have exactly the same hardware and software. The transmitter configuration with just 2 power amplifiers producing 1.0 kW uses a slightly different harmonic filter and emission mask filter at the transmitter output. Thus, there is one set of data for the configuration using 3-5 amplifiers and a separate emission mask data set for the transmitter configuration with 2 power amplifiers. Measurements outlined below were recorded of spectrum and other data to demonstrate compliance. 1. Power Output Measurements 2. Frequency stability tests versus AC input voltage and temperature 3. Measurements to demonstrate the transmitter meets the DTV emission mask as specified in FCC Rule 74.794 (a) (2) (ii) and 74.794 (b) (1). 4. Measurement of cabinet radiation for spurs and harmonics as specified in FCC Rule 2.1053 and Rule 2.1057 Measurements for power output and emission mask compliance were conducted at power output levels of both 2500 watts and 800 watts for the 3-5 power amplifier configurations. Emission mask compliance measurements were also conducted over the 250 watts to 1000 watts range for the 2 power amplifier configuration. Thus, these are the ranges over which type certification for these transmitters are sought. The 3-5 power amplifier transmitter was tested with two emission mask filters from different sources so that the transmitter manufacturer could use either filter in the equipment. The test results for both filters are included in the data set for the 2500 watt and 800 watt power output (measured after the filter) levels. The test equipment used for the measurements is listed at the end of this document. 3 Note: The coupling factor of directional coupler #2 was determined to be 57.0 dB at channel 36. FIGURE 1—TEST EQUIPMENT CONFIGURATION Exciter Transmitter PA Directional Coupler #1 Emission Mask Filter Directional Coupler #2 Bandstop Filter R & S ETL R & S FSV-30 R & S NRP-Z11 Power Meter High Pass Filter Dummy Load Personal Computer 4 RF Power Output Measurements The equipment was configured as shown in Figure 1. The coupling factor of directional coupler #2 was calibrated at the center frequency of the channel 36 DTV signal of 605 MHz. The coupling value was 57.0 dB. Average power was measured with the R & S NRP-Z11 power sensor and displayed on the personal computer using Power Viewer Plus. The indicated reading is shown below. Figure 2—Power Meter Reading at Nominal Transmitter Power Calculation of Output Power: An offset of 59.1dB from the directional coupler and cable loss was added to the Power Viewer Plus program. The actual value of 5.0 dBm was measured on the Power Viewer Plus display and then the offset value of 59.1 dBm was added to the cable and directional coupler coupling value to display the correct value of 64.0 dBm or 2500 watts. With this operating state, measured transmitter final amplifier voltage is at or below 50 VDC and final amplifier current is 271 Amps. The final RF amplifier stage currents from each amplifier were added and then summed. The power supply voltage for each amplifier was then multiplied by the total current for each amplifier to obtain the total DC power of 13.5 kW to the final amplifier stage. 5 Emission Mask Compliance To determine conducted radiation emission mask compliance, the test equipment configuration shown on Figure 1 was used. For adjacent channel measurements, the R & S ETL spectrum analyzer was used and for harmonic and spurious measurements, the R & S FSV30 was used. The transmitter was tested for compliance with the stringent emission mask as specified in FCC rule 74.794 (a) (2) (ii). The IEEE 2008- 1631 Recommended Practice On 8-VSB Digital Television Transmission Compliance Measurement was used as the test measurement methodology. The first part of the emission mask compliance tests measured the adjacent channel emission and the second part of the tests measured the harmonic and spurious energy. The transmitter was energized at 2500 watts on Channel 36 (center frequency of 605 MHz) as measured at the output of Directional coupler #2 and a reference was established on the ETL spectrum analyzer (using the channel power measurement mode). The bandstop filter insertion loss versus frequency response was previously determined using the ETL spectrum analyzer function and tracking generator combination. The insertion loss at the center of each of the twelve 500 kHz segments either side of the main channel was tabulated. The…

Text truncated - open the document above for the full version.