BZ5MX100UTranslator

PUBLICATION TSM 20-308 TECHNICAL MANUAL 100 WATT UHF AMPLIFIER FOR MX100U SERIES TV TRANSMITTER/TRANSLATOR LARCAN INC. 228 AMBASSADOR DRIVE MISSISSAUGA, ONTARIO CANADA L5T 2J2 PHONE:(905) 564-9222 FAX:(905) 564-9244 Rev 0: November 9, 1999 MX Series - 100 Watt UHF AMPLIFIER TSM 20-308 rev 1: April 3, 20001100 W UHF Amplifier SectionTitlePage NOTICES, ETC. ...............................................................................................................................3 SAFETY AND HEALTH WARNINGS ............................................................................. 4&5 GENERAL SERVICE INFORMATION 1) Parts Lists Explained..........................................................................................5 2) Interpreting LARCAN Drawing Numbers............................................................5 3) The LARCAN Assembly Prefix Numbering System ...........................................6 4) List of Prefix Numbers for the 100 W Amplifier ..................................................7 5) Production Changes ...........................................................................................7 INTRODUCTION .................................................................................................................8 GENERAL DESCRIPTION..................................................................................................8 SPECIFICATIONS.............................................................................................................10 ABOUT THIS MANUAL .....................................................................................................11 PUBLICATIONS LIST for MX series 100W UHF Amplifier: PUB99-30 100W UHF Amplifier Installation: 1.General Information..............................................................................30-1 2.Grounding and Ground Loops ..............................................................30-2 3.Lightning and other Transient Protection .............................................30-4 4.Power Wiring ........................................................................................30-9 5.Ventilation and Air Conditioning .........................................................30-10 6.Fire Protection ....................................................................................30-11 7.Unpacking ..........................................................................................30-12 8.Transmitter External Interlock Connections .......................................30-12 9.On Site: First Time Start-up................................................................30-13 PUB99-31 100W UHF Amplifier (Prefix 2): 1.Amplifier Chassis Description...............................................................31-1 MX Series - 100 Watt UHF AMPLIFIER TSM 20-308 rev 1: April 3, 20002100 W UHF Amplifier SectionTitlePage PUB99-32 Heatsink Assembly: 1.Heatsink Assembly Description............................................................32-1 2.Front End Module .................................................................................32-2 3.IPA1 Module.........................................................................................32-2 4.IPA2/PA Module ...................................................................................32-4 5.Two-way Splitter/Combiner ..................................................................32-5 6.+28V Voltage Regulator .......................................................................32-5 PUB99-33 RF Output Metering Board (Prefix 4): 1.RF Metering Board Description ............................................................33-1 2.RF Metering Board Test and Calibration ..............................................33-2 PUB99-34 100W UHF Power Supply (Prefix 1): 1.Power Supply Chassis Description ......................................................34-1 2.Control Panel .......................................................................................34-2 3.Control Board Assembly Description ...................................................34-2 PUB99-35 100W UHF Basic Transmitter Maintenance: 1.General.................................................................................................35-1 2.Daily .....................................................................................................35-1 3.Weekly..................................................................................................35-2 4.Monthly .................................................................................................35-2 5.Semi-annually and Annually .................................................................35-2 6.Transmitter Cooling System .................................................................35-2 7.Static 1, Equipment 0: A brief Static Tutorial........................................35-3 8.FET and Surface Mount Replacement .................................................35-4 9.Replacement Parts ...............................................................................35-7 10.Spare Parts Recommendations ...........................................................35-9 CADCO M-369 Manual CADCO P-379 Manual MX100 Series - 100 Watt UHF AMPLIFIER TSM 20-308 rev 1: April 3, 20003100 W UHF Amplifier NOTICES, ETC.: THIS EQUIPMENT USES STATIC-SENSITIVE CMOS INTEGRATED CIRCUITS. Observe proper handling precautions (indicated in Maintenance Sections) at all times when working with this equipment. TOXIC MATERIALS NOTICE... IMPORTANT... Effective thermal management in certain semiconductor devices in this equipment is possible only through the use of Beryllium Oxide ceramic materials. This equipment contains devices made with Beryllium Oxide! Beryllium and its compounds is a POISON if taken into the body in any manner. To reduce your risk, remember: In case of accidental breakage of any kind of semiconductor device, DO NOT INHALE THE DUST, and AVOID GETTING DUST IN YOUR MOUTH; it could c…

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PUBLICATION TSM 20-308 TECHNICAL MANUAL 100 WATT UHF AMPLIFIER FOR MX100U SERIES TV TRANSMITTER/TRANSLATOR LARCAN INC. 228 AMBASSADOR DRIVE MISSISSAUGA, ONTARIO CANADA L5T 2J2 PHONE:(905) 564-9222 FAX:(905) 564-9244 Rev 0: November 9, 1999 MX Series - 100 Watt UHF AMPLIFIER TSM 20-308 rev 1: April 3, 20001100 W UHF Amplifier SectionTitlePage NOTICES, ETC. ...............................................................................................................................3 SAFETY AND HEALTH WARNINGS ............................................................................. 4&5 GENERAL SERVICE INFORMATION 1) Parts Lists Explained..........................................................................................5 2) Interpreting LARCAN Drawing Numbers............................................................5 3) The LARCAN Assembly Prefix Numbering System ...........................................6 4) List of Prefix Numbers for the 100 W Amplifier ..................................................7 5) Production Changes ...........................................................................................7 INTRODUCTION .................................................................................................................8 GENERAL DESCRIPTION..................................................................................................8 SPECIFICATIONS.............................................................................................................10 ABOUT THIS MANUAL .....................................................................................................11 PUBLICATIONS LIST for MX series 100W UHF Amplifier: PUB99-30 100W UHF Amplifier Installation: 1.General Information..............................................................................30-1 2.Grounding and Ground Loops ..............................................................30-2 3.Lightning and other Transient Protection .............................................30-4 4.Power Wiring ........................................................................................30-9 5.Ventilation and Air Conditioning .........................................................30-10 6.Fire Protection ....................................................................................30-11 7.Unpacking ..........................................................................................30-12 8.Transmitter External Interlock Connections .......................................30-12 9.On Site: First Time Start-up................................................................30-13 PUB99-31 100W UHF Amplifier (Prefix 2): 1.Amplifier Chassis Description...............................................................31-1 MX Series - 100 Watt UHF AMPLIFIER TSM 20-308 rev 1: April 3, 20002100 W UHF Amplifier SectionTitlePage PUB99-32 Heatsink Assembly: 1.Heatsink Assembly Description............................................................32-1 2.Front End Module .................................................................................32-2 3.IPA1 Module.........................................................................................32-2 4.IPA2/PA Module ...................................................................................32-4 5.Two-way Splitter/Combiner ..................................................................32-5 6.+28V Voltage Regulator .......................................................................32-5 PUB99-33 RF Output Metering Board (Prefix 4): 1.RF Metering Board Description ............................................................33-1 2.RF Metering Board Test and Calibration ..............................................33-2 PUB99-34 100W UHF Power Supply (Prefix 1): 1.Power Supply Chassis Description ......................................................34-1 2.Control Panel .......................................................................................34-2 3.Control Board Assembly Description ...................................................34-2 PUB99-35 100W UHF Basic Transmitter Maintenance: 1.General.................................................................................................35-1 2.Daily .....................................................................................................35-1 3.Weekly..................................................................................................35-2 4.Monthly .................................................................................................35-2 5.Semi-annually and Annually .................................................................35-2 6.Transmitter Cooling System .................................................................35-2 7.Static 1, Equipment 0: A brief Static Tutorial........................................35-3 8.FET and Surface Mount Replacement .................................................35-4 9.Replacement Parts ...............................................................................35-7 10.Spare Parts Recommendations ...........................................................35-9 CADCO M-369 Manual CADCO P-379 Manual MX100 Series - 100 Watt UHF AMPLIFIER TSM 20-308 rev 1: April 3, 20003100 W UHF Amplifier NOTICES, ETC.: THIS EQUIPMENT USES STATIC-SENSITIVE CMOS INTEGRATED CIRCUITS. Observe proper handling precautions (indicated in Maintenance Sections) at all times when working with this equipment. TOXIC MATERIALS NOTICE... IMPORTANT... Effective thermal management in certain semiconductor devices in this equipment is possible only through the use of Beryllium Oxide ceramic materials. This equipment contains devices made with Beryllium Oxide! Beryllium and its compounds is a POISON if taken into the body in any manner. To reduce your risk, remember: In case of accidental breakage of any kind of semiconductor device, DO NOT INHALE THE DUST, and AVOID GETTING DUST IN YOUR MOUTH; it could c…

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APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 15 ENGINEER’S STATEMENT I, John Tremblay, do hereby certify that the attached information was prepared by me or under my direction. ____________________________ John E. Tremblay, P. Eng. Vice-President Engineering 26 Feb. 2002 ____________________________ Date

APPLICATION FOR FCC CERTIFICIATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT NO.TITLENO.OF PAGES 1 Supporting Statement, Application5 for FCC Certification of BZ5MX100U 2 Instruction Manuals 2a100W UHF Amplifier Manual 2bCadco M369 Operating Manual 3 Test Measurement Set-up 4 Frequency Drift vs. Temperature2 4aModulated Tabulated Data 4bTemperature Test Set-up 5 Aural Test Set-up 6 Active Devices and Function List2 7 FCC Identification Label for BZ5MX100U 8 Power Measurement Statement 9 Attenuation/Swept Sidebands Tabulated Data 10 Video Waveforms3 10aInput Modulated Stair Step 10bOutput Unmodulated Stair Step 10cDifferential Gain 10dDifferential Phase 11 Group Delay2 11aOverall Group Delay Tabulated Data 11bOverall Group Delay Graph 12 Audio Frequency Response, 50% Modulation 13 Audio Frequency Response, 100% Modulation 14 BZ5MX100U Translator Photos7 14aPhoto, Front Overall View of BZ5MX100U 14bPhoto, Front View Amplifier 14cPhoto, Interior View, Amplifier 14dPhoto, Amplifier Rear View with FCC Label 14ePhoto, Front View, Power Supply 14fPhoto, Interior View, Power Supply 14gPhoto, Power Supply View with FCC Label 15 Engineer’s Statement APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 1 This application requests authorization for video/audio input to our 100 Watt UHF Translator, BZ5MX100U (Certification applied for). The amplifier will be driven directly by a color television modulator. The intended use of the BZ5MX100U is to rebroadcast a television translator relay station or other legal source of video and audio. A paragraph by paragraph reference is given herein, presenting the required additional data to that called for on FCC Form 731 for FCC Certification of BZ5MX100U 100 Watt UHF Translator. Exhibits are attached to authenticate this application. If further data is required, it will be furnished on request. The unit tested specifically for this application was operated on Channel 21. This channel was chosen to provide protection to and from existing radio services, and to facilitate the measurement of possible spurious products conducted or radiated from the 100 Watt UHF Translator. The results noted here are “worse case” unless otherwise noted. The input signals used in the tests were generated by a color bar generator driving a Cadco Modulator which is typically the modulator used. However, due to varying customer requirements, other modulators are available on customer request. The published specifications on any modulator used in this equipment will meet or exceed FCC specifications. The output of the 100 Watt UHF Translator was properly terminated with a resistive type RF load. 2.1033(b)(1): Applicant is the manufacturer of the equipment. See FCC Form 731 2.1033(b)(2): See FCC Form 731 2.1033(b)(3): Exhibit 2 (100W UHF Amplifier Manual, Cadco M369 Operating Manual) 2.1033(b)(4): Exhibit 6 (Active Devices and Function List) 2.1033(b)(5,6,7): See also, the paragraph by paragraph summary of compliance with Part 74, Sub-part G of the FCC Commission Rules that follow. PART 74.750(c)(1): The frequency stability of this equipment as measured per Part 2.1055 of the rules is much better than required over the specified range of the input voltage and temperature. PART 74.761(a): The frequency stability of the visual carrier is totally dependent upon the modulator. Exhibits 4a and 4b document the measurements made, including method and equipment. Modulator output frequency can be, and is normally set to zero deviation at the output channel. As shown in Exhibit 4a, the typical characteristic variation due to temperature is less than +.002%. This is true for all modulator channels. APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 2 PART 74.750(c)(2): Observations were made on a properly operating translator video to Channel 21 using a Hewlett- Packard 8591E Spectrum Analyzer with a cut to frequency dipole antenna at 10 meters from the translator and rotated to detect maximum radiation. The following signals were present: SPECIFICATION FREQUENCY(MHz)SOURCELIMIT uVMEASURED uV 1374.502 nd Harmonic 700 100 559.00 LO 238133 10 Radiation from the modulator was nil. No spurious products could be detected at 10 meters that were less than 90dB down. Antenna terminal measurements with the 8591E Spectrum Analyzer showed no change due to the modulator since the power amplifier stages are not affected by this modulation. The above tests were performed using the same equipment hook up and methods described in Exhibit 3. The translator test data compiled for this application was video to Channel 21. Translator operating with a standard video test signal input (modulated stair step and color burst) and a modulated audio carrier at –10dB of peak visual. Results are typical of performance on all channels. PART 74.750(c)(3)(ii): Variation of input voltage +15% (reference +24VDC or 120VAC) during the temperature tests resulted in no discernible frequency variation traceable to the power supply. This is reasonable due to the modulator’s internal regulation. PART 74.750(c)(4): The stability of the modulator’s self-generated RF carrier must be considered to determine the overall 100 Watt UHF Translator’s frequency stability. Exhibits 4a and 4b document the performance measurements made including methods and equipment. PART 74.750(c)(5): This equipment meets all the requirements for unattended operation. A description of the automatic control circuitry can be found in Exhibit 2a. PART 74.750(c)(6): Measurements can be taken while the equipment is in operation. Normal operating constants of the power output stage average +28 volts at 13 amps. PART 74.750(c)(7) AND PART 74.783(a)(2): Station identification requirements will be supplied by the originating station. APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 3 PART 74.750(c)(8): Wiring, shielding …

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APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 14a PHOTO, FRONT OVERALL VIEW OF BZ5MX100U APPLICATON FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 14b PHOTO, FRONT VIEW AMPLIFIER APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 14e PHOTO, FRONT VIEW, POWER SUPPLY

APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 14c PHOTO, INTERIOR VIEW, AMPLIFIER APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 14f PHOTO, INTERIOR VIEW, POWER SUPPLY

APPLICATION FOR FCC CERTIFICIATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT NO.TITLENO.OF PAGES 1 Supporting Statement, Application5 for FCC Certification of BZ5MX100U 2 Instruction Manuals 2a100W UHF Amplifier Manual 2bCadco M369 Operating Manual 3 Test Measurement Set-up 4 Frequency Drift vs. Temperature2 4aModulated Tabulated Data 4bTemperature Test Set-up 5 Aural Test Set-up 6 Active Devices and Function List2 7 FCC Identification Label for BZ5MX100U 8 Power Measurement Statement 9 Attenuation/Swept Sidebands Tabulated Data 10 Video Waveforms3 10aInput Modulated Stair Step 10bOutput Unmodulated Stair Step 10cDifferential Gain 10dDifferential Phase 11 Group Delay2 11aOverall Group Delay Tabulated Data 11bOverall Group Delay Graph 12 Audio Frequency Response, 50% Modulation 13 Audio Frequency Response, 100% Modulation 14 BZ5MX100U Translator Photos7 14aPhoto, Front Overall View of BZ5MX100U 14bPhoto, Front View Amplifier 14cPhoto, Interior View, Amplifier 14dPhoto, Amplifier Rear View with FCC Label 14ePhoto, Front View, Power Supply 14fPhoto, Interior View, Power Supply 14gPhoto, Power Supply View with FCC Label 15 Engineer’s Statement APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 1 This application requests authorization for video/audio input to our 100 Watt UHF Translator, BZ5MX100U (Certification applied for). The amplifier will be driven directly by a color television modulator. The intended use of the BZ5MX100U is to rebroadcast a television translator relay station or other legal source of video and audio. A paragraph by paragraph reference is given herein, presenting the required additional data to that called for on FCC Form 731 for FCC Certification of BZ5MX100U 100 Watt UHF Translator. Exhibits are attached to authenticate this application. If further data is required, it will be furnished on request. The unit tested specifically for this application was operated on Channel 21. This channel was chosen to provide protection to and from existing radio services, and to facilitate the measurement of possible spurious products conducted or radiated from the 100 Watt UHF Translator. The results noted here are “worse case” unless otherwise noted. The input signals used in the tests were generated by a color bar generator driving a Cadco Modulator which is typically the modulator used. However, due to varying customer requirements, other modulators are available on customer request. The published specifications on any modulator used in this equipment will meet or exceed FCC specifications. The output of the 100 Watt UHF Translator was properly terminated with a resistive type RF load. 2.1033(b)(1): Applicant is the manufacturer of the equipment. See FCC Form 731 2.1033(b)(2): See FCC Form 731 2.1033(b)(3): Exhibit 2 (100W UHF Amplifier Manual, Cadco M369 Operating Manual) 2.1033(b)(4): Exhibit 6 (Active Devices and Function List) 2.1033(b)(5,6,7): See also, the paragraph by paragraph summary of compliance with Part 74, Sub-part G of the FCC Commission Rules that follow. PART 74.750(c)(1): The frequency stability of this equipment as measured per Part 2.1055 of the rules is much better than required over the specified range of the input voltage and temperature. PART 74.761(a): The frequency stability of the visual carrier is totally dependent upon the modulator. Exhibits 4a and 4b document the measurements made, including method and equipment. Modulator output frequency can be, and is normally set to zero deviation at the output channel. As shown in Exhibit 4a, the typical characteristic variation due to temperature is less than +.002%. This is true for all modulator channels. APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 2 PART 74.750(c)(2): Observations were made on a properly operating translator video to Channel 21 using a Hewlett- Packard 8591E Spectrum Analyzer with a cut to frequency dipole antenna at 10 meters from the translator and rotated to detect maximum radiation. The following signals were present: SPECIFICATION FREQUENCY(MHz)SOURCELIMIT uVMEASURED uV 1374.502 nd Harmonic 700 100 559.00 LO 238133 10 Radiation from the modulator was nil. No spurious products could be detected at 10 meters that were less than 90dB down. Antenna terminal measurements with the 8591E Spectrum Analyzer showed no change due to the modulator since the power amplifier stages are not affected by this modulation. The above tests were performed using the same equipment hook up and methods described in Exhibit 3. The translator test data compiled for this application was video to Channel 21. Translator operating with a standard video test signal input (modulated stair step and color burst) and a modulated audio carrier at –10dB of peak visual. Results are typical of performance on all channels. PART 74.750(c)(3)(ii): Variation of input voltage +15% (reference +24VDC or 120VAC) during the temperature tests resulted in no discernible frequency variation traceable to the power supply. This is reasonable due to the modulator’s internal regulation. PART 74.750(c)(4): The stability of the modulator’s self-generated RF carrier must be considered to determine the overall 100 Watt UHF Translator’s frequency stability. Exhibits 4a and 4b document the performance measurements made including methods and equipment. PART 74.750(c)(5): This equipment meets all the requirements for unattended operation. A description of the automatic control circuitry can be found in Exhibit 2a. PART 74.750(c)(6): Measurements can be taken while the equipment is in operation. Normal operating constants of the power output stage average +28 volts at 13 amps. PART 74.750(c)(7) AND PART 74.783(a)(2): Station identification requirements will be supplied by the originating station. APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 3 PART 74.750(c)(8): Wiring, shielding …

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APPLICATION FOR FCC CERTIFICIATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT NO.TITLENO.OF PAGES 1 Supporting Statement, Application5 for FCC Certification of BZ5MX100U 2 Instruction Manuals 2a100W UHF Amplifier Manual 2bCadco M369 Operating Manual 3 Test Measurement Set-up 4 Frequency Drift vs. Temperature2 4aModulated Tabulated Data 4bTemperature Test Set-up 5 Aural Test Set-up 6 Active Devices and Function List2 7 FCC Identification Label for BZ5MX100U 8 Power Measurement Statement 9 Attenuation/Swept Sidebands Tabulated Data 10 Video Waveforms3 10aInput Modulated Stair Step 10bOutput Unmodulated Stair Step 10cDifferential Gain 10dDifferential Phase 11 Group Delay2 11aOverall Group Delay Tabulated Data 11bOverall Group Delay Graph 12 Audio Frequency Response, 50% Modulation 13 Audio Frequency Response, 100% Modulation 14 BZ5MX100U Translator Photos7 14aPhoto, Front Overall View of BZ5MX100U 14bPhoto, Front View Amplifier 14cPhoto, Interior View, Amplifier 14dPhoto, Amplifier Rear View with FCC Label 14ePhoto, Front View, Power Supply 14fPhoto, Interior View, Power Supply 14gPhoto, Power Supply View with FCC Label 15 Engineer’s Statement APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 1 This application requests authorization for video/audio input to our 100 Watt UHF Translator, BZ5MX100U (Certification applied for). The amplifier will be driven directly by a color television modulator. The intended use of the BZ5MX100U is to rebroadcast a television translator relay station or other legal source of video and audio. A paragraph by paragraph reference is given herein, presenting the required additional data to that called for on FCC Form 731 for FCC Certification of BZ5MX100U 100 Watt UHF Translator. Exhibits are attached to authenticate this application. If further data is required, it will be furnished on request. The unit tested specifically for this application was operated on Channel 21. This channel was chosen to provide protection to and from existing radio services, and to facilitate the measurement of possible spurious products conducted or radiated from the 100 Watt UHF Translator. The results noted here are “worse case” unless otherwise noted. The input signals used in the tests were generated by a color bar generator driving a Cadco Modulator which is typically the modulator used. However, due to varying customer requirements, other modulators are available on customer request. The published specifications on any modulator used in this equipment will meet or exceed FCC specifications. The output of the 100 Watt UHF Translator was properly terminated with a resistive type RF load. 2.1033(b)(1): Applicant is the manufacturer of the equipment. See FCC Form 731 2.1033(b)(2): See FCC Form 731 2.1033(b)(3): Exhibit 2 (100W UHF Amplifier Manual, Cadco M369 Operating Manual) 2.1033(b)(4): Exhibit 6 (Active Devices and Function List) 2.1033(b)(5,6,7): See also, the paragraph by paragraph summary of compliance with Part 74, Sub-part G of the FCC Commission Rules that follow. PART 74.750(c)(1): The frequency stability of this equipment as measured per Part 2.1055 of the rules is much better than required over the specified range of the input voltage and temperature. PART 74.761(a): The frequency stability of the visual carrier is totally dependent upon the modulator. Exhibits 4a and 4b document the measurements made, including method and equipment. Modulator output frequency can be, and is normally set to zero deviation at the output channel. As shown in Exhibit 4a, the typical characteristic variation due to temperature is less than +.002%. This is true for all modulator channels. APPLICATION FOR FCC CERTIFICATION BZ5MX100U MODULATOR INPUT 100 WATT UHF TRANSLATOR EXHIBIT 1PAGE 2 PART 74.750(c)(2): Observations were made on a properly operating translator video to Channel 21 using a Hewlett- Packard 8591E Spectrum Analyzer with a cut to frequency dipole antenna at 10 meters from the translator and rotated to detect maximum radiation. The following signals were present: SPECIFICATION FREQUENCY(MHz)SOURCELIMIT uVMEASURED uV 1374.502 nd Harmonic 700 100 559.00 LO 238133 10 Radiation from the modulator was nil. No spurious products could be detected at 10 meters that were less than 90dB down. Antenna terminal measurements with the 8591E Spectrum Analyzer showed no change due to the modulator since the power amplifier stages are not affected by this modulation. The above tests were performed using the same equipment hook up and methods described in Exhibit 3. The translator test data compiled for this application was video to Channel 21. Translator operating with a standard video test signal input (modulated stair step and color burst) and a modulated audio carrier at –10dB of peak visual. Results are typical of performance on all channels. PART 74.750(c)(3)(ii): Variation of input voltage +15% (reference +24VDC or 120VAC) during the temperature test…

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