BMTTTHDU250Broadcast Transmitter

1635 West 12 th Place Tempe, Arizona 85281 USA 480-315-1661 July 21, 2009 Joe Dichoso Office of Engineering and Technology Federal Communications Commission Re: FCC ID: BMTTTHDU250, Form 731 Filing Confirmation #: EA181997 Dear Sir: We formally request type acceptance for the TTHDU-250 UHF Broadcast Transmitter under FCC Rule Part 74. This transmitter may be utilized for digital video, or data transmission in the UHF Broadcast Band. We request that the grant include the following specifications. Rule Part Frequency Frequency Emission Output Range Tolerance Designator Power 74 470-608 MHz 1000 Hz 6M00K1D 300 Watts (Average) 74 614-806 MHz 1000 Hz 6M00K1D 300 Watts (Average) The test report filed under this application will demonstrate that the TTHDU-250 complies will all relevant rules for digital and analog operations under Part 74. Thank you in advance for your understanding and cooperation. Please contact me if you need additional information or clarification of items in our filing. Sincerely, James A. Yard, CEO

1635 West 12 th Place Tempe, Arizona 85281 USA 480-315-1661 July 21, 2009 Joe Dichoso Office of Engineering and Technology Re: FCC ID BMTTTHDU250 Confirmation #: EA181997 Confidentiality Letter Dear Sir: We formally request confidentiality for the Operator Manual, Schematic Diagrams, Operational Description, Internal Photos, Parts Lists and Tune-Up Information exhibits submitted with this application. These documents contain proprietary design specific information that is not released in the general public domain. No additional user manual is provided to the general public that contains the information for which we request confidentiality. Customers of this product are provided with a copy of these documents to guide them in the safe deployment, field service, and proper operation and utilization of the transmitter The only customers for this product are FCC licensed broadcasters, and the product is not for sale to the general public. These transmitters are located in secure and/or remote facilities which are not accessible to the general public. To publicly disclose this information would provide public disclosure of trade secrets and damage our competitive advantages. Thank you in advance for your understanding and cooperation. Sincerely, James A. Yard, CEO

1635 West 12 th Place Tempe, Arizona 85281 USA 480-315-1661 July 21, 2009 Joe Dichoso Office of Engineering and Technology Federal Communications Commission Re: FCC ID: BMTTTHDU250, Form 731 Filing Confirmation #: EA181997 Subject: External Photos TTHDU-250 Front View TTHDU-250 Rear View

1635 West 12 th Place Tempe, Arizona 85281 USA 480-315-1661 July 21, 2009 Joe Dichoso Office of Engineering and Technology Federal Communications Commission Re: FCC ID: BMTTTHDU250, Form 731 Filing Confirmation #: EA181997 Subject: Rear Panel FCC ID and Product Information Label Photo of the FCC ID and Product Information Label affixed to the rear panel of the transmitter.

FCC ID: BMTTTHDU250 Confirmation # EA181977 FCC TYPE ACCEPTANCE REPORT For the EMCEE TTHDU-250 UHF Transmitter 21 July, 2009 EMCEE Communications 1635 West 12 th Place Tempe, AZ 85281 480-315-1661 Application For FCC Certification BMTTTHDU250-Test Report Page 2 TABLE OF CONTENTS 1.0 INTRODUCTION............................................................................................. 3 2.0 CERTIFICATION OF DATA .............................................................................. 3 3.0 TEST EQUIPMENT.......................................................................................... 3 4.0 MEASUREMENTS........................................................................................... 4 4.1 RF POWER MEASUREMENTS ........................................................................4 4.1.1 Digital RF Power Measurement ...............................................................4 4.2 MODULATION CHARACTERISTICS................................................................5 4.2.1 Digital Modulation Characteristics...........................................................5 4.2.1.2 DEMODULATED DIGITAL PERFORMANCE CHARACTERISTICS.................................9 4.3 OCCUPIED BANDWIDTH ............................................................................. 10 4.3.1 Modulation Channel Occupancy ............................................................ 10 4.3.2 Occupied Bandwidth in Digital Operation .............................................. 11 4.4 SPURIOUS EMISSIONS AT ANTENNA TERMINALS....................................... 12 4.4.1 Spurious Emissions Tests with Digital Modulation.................................. 13 4.4.2 Protection to Radio Navigation Satellite Services .................................. 81 4.5 FREQUENCY STABILITY .............................................................................. 82 4.6 FIELD STRENGTH OF SPURIOUS EMISSIONS .............................................. 83 5.0 SUMMARY ....................................................................................................84 Application For FCC Certification BMTTTHDU250-Test Report Page 3 1.0 INTRODUCTION This test report contains the required information for type acceptance of the EMCEE Model TTHDU-250 UHF Transmitter. The data presented was taken from laboratory tests performed on a production transmitter system designed to transmit in the frequency range of 470-806 MHz at up to 300.0 Watts average power in digital mode and utilized for operation in the UHF bands under FCC Rule Part 74. The transmitter system design and test data reflect operation and performance pursuant to the rules as prescribed in Part 74 of the Commission’s Rules. 2.0 CERTIFICATION OF DATA I certify that the testing procedures and the accumulated test data contained in this report have been personally supervised by me, and that the test results are true and correct to the best of my knowledge and belief. __________________ James A. Yard, CEO EMCEE Communications 3.0 TEST EQUIPMENT The following is a list of major test equipment which was used in testing the LPU-300 transmitter. Manufacturer Model # Serial Number Description HP/Agilent 89431A US39312280 VSA RF Section HP/Agilent 89441A US39313875 Vector Signal Analyzer HP/Agilent 8753ES US39171643 Vector Network Analyzer HP/Agilent E4433B US38080113 Signal Generator HP/Agilent E4402B US39010125 Spectrum Analyzer HP/Agilent E7405A US39440172 EMC/Spectrum Analyzer Tektronix VM-700A B030893 Video Measurement Test Set Tektronix 1450-1 B011060 Precision Demodulator Tektronix TSG95 B028349 Video Generator EMCEE LPSMF-100 32499 Output Band Pass Filter Narda 3020A 20dB Directional Coupler Narda Microwave 768-20 20dB Attenuator HP/Agilent 8903B 3514A15172 Audio Analyzer Application For FCC Certification BMTTTHDU250-Test Report Page 4 4.0 MEASUREMENTS 4.1 RF POWER MEASUREMENTS 4.1.1 Digital RF Power Measurement Figure 4-3 shows the test equipment setup for the digital RF power measurements. Figure 4-1: Test Setup for Digital Power Measurement Method of Measurement: The TTHDU-250, modulated with a ATSC compliant 8VSB modulator, was adjusted to obtain a 300 Watt average channel power (54.75 dBm) measurement on the spectrum analyzer at the output of the mask filter. The metering circuit was adjusted to obtain a 100% reading on the forward power meter. With the transmitter properly configured for digital operation and the average power set to 300 Watts, all required tests were performed and the digital operation test data recorded in the following sections of the test report. The results of the digital power measurement test are shown in Figure 4-2. Figure 4-2: Digital Power Measurement Test Application For FCC Certification BMTTTHDU250-Test Report Page 5 4.2 MODULATION CHARACTERISTICS 4.2.1 Digital Modulation Characteristics 4.2.1.1 Description of 8-VSB Digital Modulation 8-VSB is the RF modulation format utilized by the ATSC digital television standard to transmit digital bits over the airways to the home consumer. Since any terrestrial TV system must overcome numerous channel impairments such as ghosts, noise bursts, signal fades, and interference in order to reach the home viewer, the selection of the right RF modulation format is critical. Being one of the most crucial aspects of the DTV system, the 8-VSB format has received a great deal of attention and scrutiny recently. There are two fundamental technologies when describing the complete DTV system: 8-VSB and MPEG-2. 8-VSB is the RF modulation format and MPEG-2 is the video compression/packetization format. To convert high definition video into a form suitable for over-the-air broadcast, according to ATSC standards, two stages of processing are needed: MPEG-2 encoding and 8-VSB modulation. Accordingly, two major pieces of equipment are required: an MPEG-2 encoder and an 8-VSB modulator. The MPEG-2 encoder accepts the baseband digital video and performs bit rate compression using the techniques…

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