PW2XL1000-PROTV Broadcast Translator Retrofit Kit

SPECIFICATION FOR XL1000-PRO Output Power:1000 Watt Peak Visual, 100 Watt Aural Output Frequency Range:UHF Channel 14-69 (470-806 MHz) Type of Emission:Visual 5M75C3F, Aural 250kF3E Frequency Stability:Input Source dependent Output Load Impedance:50 ohms, EIA 7/8” flange Output Frequency Response:+/- 2 dB over 6 MHz channel Video Performance: Differential Gain 0.5 dB typical Differential Phase 3 degrees typical K factor2% typical 3 tone IMD -52 dB typical Harmonics:-60 dB relative to visual peak power Spurious Products:-60 dB relative to visual peak power (Frequencies >3 MHz outside of channel) Input Power: +40 dBmv nominal Input Impedance:75 ohms, BNC female connector Input Carrier Frequency: 45.75 MHz (NTSC Visual carrier) Temperature Range: Operating -30 to +45 degrees C Storage –40 to+70 degrees C Power Consumption: Operating3800 VA typical at rated Power Output Input Power Source: 208-230 VAC +/- 5%, 60 Hz Dimensions: Width23 inches (58 cm) Height79 inches (200 cm) Depth31 inches (79 cm) Weight:600 lbs (1320 kg)

XL1000Pro Retrofit Instructions XL1000Pro PREPARATORY MEASUREMENTS AND ADJUSTMENTS: The following adjustments are recommended to insure that the transmitter is working properly before any changes are made. 1.Apply video signal composed of blanking level with sync and color burst to the modulator and connect the output of the driver to a separate watt meter and 50 ohm load. Measure the output power of the driver. It should be about 3.0 to 4.0 watts. The front panel Power adjustment knob should vary the power by +1 to -4 dB. If the output power is capable of greater than +1 dB power increase, adjust the variable resistor (see the XL1000 instruction Manual) to ensure a limit of 5.5 watts is maintained. This is important to protect the power amplifier from damage by overdrive. Overdrive damage to the XL1000-PRO is not covered by warranty. 2.Connect a directional coupler in the main RF path before the wattmeter and load. Connect the forward sample port to a spectrum analyzer, after ensuring the RF level at the sample port is less than the maximum input level for the spectrum analyzer. Using the modulator controls, adjust the aural/visual ratio to -13 dB (5%) as measured on the spectrum analyzer. This is a typical setting for most applications, however, the power amplifier can be used at higher levels if necessary with only minor degradation in performance. 3.Measure the purity of the driver output signal on the spectrum analyzer. This measurement is made to ensure that the mixing products are at least -45dBc or better. The solid state power amplifier that will be installed later is broadband and will amplify these unwanted signals making filtering necessary if they are out of specs to start with. If the mixing products are not –45 dBc relative to the visual carrier, consult the instruction manual or equipment supplier to achieve this. XL1000Pro Retrofit Instructions ***WARNING*** BEFORE REMOVING ANY PARTS OR WIRE, THE TRANSMITTER OR TRANSPOSER MUST BE TURNED OFF AND DISCONNECTED FROM THE PRIMARY AC POWER SOURCE. ALL OTHER EXTERNAL CONNECTIONS INCLUDING ANTENNA MUST BE DISCONNECTED. USE A GROUNDING ROD TO DISCHARGE ANY RESIDUAL CHARGES FROM THE HIGH VOL TAG E SUPPLY, CAVI TY EC T. MOVE TH E EQUIPMENT AWAY FROM OTHER EQUIPMENT SO THAT THERE WILL BE PLENTY OF ROOM TO WORK ON THE FRONT AND REAR OF THE EQUIPMENT TO BE MODIFIED. ***WARNING*** 1.Turn off the transmitter using the front circuit breaker on the front on the High Voltage Power Supply. Unplug the transmitter from the power source and then ground any excess power which may still be remaining in the transmitter, thus ensuring a safe environment to work in. 2.Move transmitter to a place where all four sides are accessible and you can work freely without any obstructions. Take off the back door of the transmitter by pulling the pins out of the hinge. Next take off side panels by first pushing the panels up and then pulling them away from the rack. 3.Inspect the transmitter for any loose wires or any other modifications w hich may have been done previously. 4.Disconnect and remove the tube from Tube and Cavity apparatus. Put tube in its tube carton or in a protected environment so it does not break. 5.Mark all the cables and their connectors with a to/from format. Disconnect coax cables from the transmitter and remove. Place aside for use later. Because of the volume of cables and wires it is better to be organized in the beginning. It will help you during the assembly phase. Disconnect the remaining cables and wires from their mating connectors and put aside for later use. You will have to cut some cable harnesses and ties to ensure all cables are removed. 6.Disconnect the main air hose from the Tube and Cavity apparatus. Disconnect the main air hose from the blower and remove. Make sure the blower motor power cord is disconnected from the junction box and any other wires have been removed from the blower assembly. Unbolt and remove the blower from the transmitter. Set aside out of the way of your workspace. 7.Disconnect main vent hose “Smoke Stack” from the Tube and Cavity apparatus, disconnect and remove main vent hose from the Airflow Switch Connector Temperature Sensor and ventilation bracket located above the tube and cavity on the top of the cabinet. Disconnect the Output Directional Coupler from the main output line connector. Disconnect the output filters from the Tube and Cavity apparatus. Remove both the Output Filters and Output Directional Coupler. Disconnect the Output Directional Coupler and Output Filters from each other. Set both aside out of the way of your workspace. XL1000Pro Retrofit Instructions 8.Inspect Tube and Cavity apparatus to ensure there are no wires or cables attached to it. This includes all coax cables. Carefully unbolt the housing from the braces. When all the bolts are removed, carefully lift the tube and cavity off the braces. Lower the tube and cavity 2-3 inches, then tip the top of the Tube and Cavity apparatus toward the back of the transmitter. When the top of the Tube and Cavity has passed through the opening in the back of the transmitter then pull the Tube and Cavity apparatus out of the transmitter. Set it aside out of workspace area. Unbolt and remove brace bars the Tube and Cavity apparatus rested on. 9. CAUTION: THE HIGH VOLTAGE PO WER SUPPLY ASSEMBLY IS VERY HEAVY AND SHOULD BE REMOVED WITH ASSISTANCE. The High Voltage Power Supply is hard wired to the junction box, so make sure you unfasten the wires from the junction box prior to removing. Disconnect the High Voltage Power Supply power cord from the junction box located in the rear of the transmitter. Make sure all wires and cables have been disconnected from the High Voltage Power Supply. From the front of the transmitter unscrew the anchor screws that hold the High Voltage Power Supply drawer. Pull the High Voltage Power Supply Drawer out as far as it will go. When the High Voltage Power Supply has reached the safety clips at the end of the…

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November 18, 2001 FCC Office of Equipment Authorization To Whom It May Concern: ATTESTATION STATEMENT I hereby certify the tests and test results were made and recorded in accordance with accepted engineering practices and do constitute an accurate representation of the retrofit kit product performance as installed on existing Television Technology XL 1000MU, serial number 1261. Signed, Gregory L. Best President, Greg Best Consulting, Inc. GREG BEST CONSULTING, INC. 5541 Vantage Vista Drive Colorado Springs, CO 80919 719-592-9781

BLOCK DIAGRAM 45 MHz Combined Visual & Aural RF Input VHF to UHF Upconverter Bandpass Filter UHF Local Oscillator Low Vol ta ge Power Supply RF Coupler Control & Power Metering Circuits Solid State 28 Vol t Pow e r Supply Solid state am p lifier 1100 watt Visual110 watt Aural Items in dashed line comprise the PTIXL1000-PRO Retrofit kit.

1 PINEAPPLE TECHNOLOGY APPLICATION FOR RETROFIT KIT FOR XL1000MU WITH RESPECT TO COMPLIANCE FOR PART 74. Pineapple Technology Inc. (PTI) has designed, built, tested and intends to market a retrofit kit, designated XL1000-PRO, to retrofit Television Technology Corp. XL1000MU TV translators with external modulator inputs. The kit consists of basically a wideband solid state power amplifier, RF bandpass filter, and power supply. The substitution of the solid state amplifier and power supply to replace existing tube amplifier in the XL1000MU is accomplished with the attached modification instructions. The attached exhibit concerning the documentation of the retrofit kit is a preliminary version of the documentation. A final documentation package will be submitted upon its completion from the publisher. Confidentiality is requested for the portion of the documentation package that includes the schematics (including block diagrams) and wiring diagrams. The submission of the following exhibits is expected to demonstrate compliance with applicable Part 74 rules and regulations. As PTI has been in discussion with the FCC with regard to this retrofit kit, attached letter indicating the detailed requirements for filing with the FCC is also attached. 2 FEDERAL COMMUNICATIONS COMMISSION Laboratory Division 7435 Oakland Mills Road Columbia, MD 21046 July 20, 2001 31010.0 Pineapple Technology, Inc. 2085 Humphrey Road Penryn, CA 95663 Attentio n: Mr. Robert R. Artigo Gentlemen: This is in response to your letter of June 13, 2001, in which you describe a need to modify existing transmitter and translator units approved by the Commission. This need has been described as being based o n the lack of availability of replacement parts for the original units and the requirement for the units to be capable of changing the operating frequency due to displacement by DTV assignments. In particular, yo u propose to replace the final RF power amplifier portion of certain Television Technology Corporation (TTC) transmitter and translator units that you identify as Models TTCXL1000MU and TTCUST0-106A, respectively. Further, you have proposed to perform all the measurements required to establish compliance with the applicable portions of the FCC Rules in Part 74, noting that the original frequency determining circuits have not been revised. Since the modification will be made by the licensee to a unit already in the field, the Commission’s rules are not clear o n who is the responsible party for the modified device and who should apply for, and receive, equipment authorizatio n of these modifications. If the responsible party is the licensee, that would require an application for Certification to be filed for each modified transmitter. This choice is unacceptable. If the respo nsible party is Pineapple, that would require a completely new filing for these transmitters because all records from the TTC filing have been destroyed by the Commission. This choice also is unacceptable. Our proposed resolution to this situation is for Pineapple to file an application for Certification of a “replacement amplifier” under the equipment class of AMP. The Grant of Certification for this device will be conditioned to apply the use of your “replacement amplifier” to the specific TTC units identified in yo ur original letter. Please note, however, that yo u must refer to these units by their original FCC identifiers (FCC IDs), not Model Numbers. Please refer to the enclosed copy of pages of the Radio Equipment List for this purpose. Test data demonstrating compliance with the technical requirements in Part 74 must be submitted along with the documentatio n specified in Section 2.1033(c) of the Rules. However, no frequency stability test data is required because, as you noted, none of the frequency determining circuitry has been modified. Please include a copy of this letter in yo ur application for equipment authorization of the “replacement amplifier.” 3 I trust that this solution will allow the upgrade of the units that yo u desire. However, if you have any additional questions abo ut this matter, please contact Mr. Frank Coperich at the address above or by telepho ne at 301-362-3023. Sincerely, Richa rd Fabi na Chief Equipment Authorization Branch

Pineapple Technology, Inc. ρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρ ρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρ ρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρρ 2085 Humphrey Road Penryn, CA 95663 PH: 916 663-1016 Fax 916 663- 1876 Customer Hotline 888-888-8229 WEB SITE: www.ptibroadcast.com _____________________________________________________ TO: Federal Communication CommissionDecember 1, 2001 From: Pineapple Technology, Inc. Dear FCC, I would like to officially add Mr. Ched Nash as a non technical contact for the application for the FCC ID PW2XL1000-PRO. Ched Nash can be contacted at the following numbers. Phone:916-663-1016 Fax:916-663-1876 [email protected] Address:2085 Humphrey Rd. Penryn, CA 95663 Thank you for making these changes. Regards, Robert Artigo, President Pineapple Technology, Inc.

February 4, 2002 Office of Equipment Authorization Federal Communication Commission To Whom It May Concern: This letter w ill address the specific equipment this retrofit kit is designed to upgrade. The FCC identifiers and aural emission associated with the TTC equipment models are the following: FCC IDMODEL NUMBEREmission designator Frequency RangePow er Output BKS9A3XL100 0MU XL1000MUTranslator470-890 MHz1000 BKS9A3XL100 0VU XL1000VUTranslator470-890 MHz1000 Sincerely, Gregory L. Best Gregory L. Best Pr esident Greg Best Consulting, Inc. 5541 Vantage Vista Drive Colorado Springs, CO 80919 719-592-9781

XL1000-PRO CONSTRUCTION PHOTOGRAPHS CABINET FRONT VIEW CABINET REAR VIEW WITH DOOR CLOSED CABINET REAR VIEW WITH DOOR OPEN TOP FRONT VIEW MIDDLE FRONT VIEW BOTTOM FRONT VIEW

XL1000-PRO CONSTRUCTION PHOTOS REAR TOP VIEW MIDDLE BACK VIEW BOTTOM BACK VIEW

PINEAPPLE TECHNOLOGY, INC. FCC ID_________________________TRANSMITTER ID_________________MODEL_________________________S/N_________________________ Penryn, CA 95663 XL1000-PROFCC ID PW2XL1000-PRO

PINEAPPLE TECHNOLOGY, INC. FCC ID_________________________TRANSMITTER ID_________________MODEL_________________________S/N_________________________ Penryn, CA 95663 XL1000-PROPW2XL1000-PRO

XL1000 PRO RETROFIT KIT THEORY OF OPERATION Introduction The XL1000 PRO is comprised of a solid state RF amplifier, power supply, RF Filter to reduce spurious products and harmonics, and hardware kit to assemble the entire unit. The purpose of the kit is to replace the tube and cavity assembly, along with support equipment for the assembly, that was part of the original equipment. System Operation The XL1000 PRO is designed to easily replace the existing tube amplifier and cavity assembly from a physical and operational point of view. The solid state power amplifier accepts the combined visual and aural on- channel RF signal from the upconverter at approximately 4 watts and amplifies the signal to the 1000 watt peak visual power level and 100 watt aural power level. The RF filter accepts the on channel signal produced by the solid state amplifier and reduces the level of any out of channel intermodulation, harmonic, or spurious signals as measured at the output connector ensuring compliance with all FCC regulations. The power supply converts the AC line voltage to a filtered DC voltage that is held constant independent of modulated RF waveform type and overall load. The power output control of the system continues to operate in the normal method as before the replacement of the tube and cavity system. An exhaust fan on the top of the cabinet provides cooling for the system. Cool air is drawn through highly reliable fans in the individual amplifier modules and exhausted at the back of the amplifiers. The exhaust fan pulls the warm air from the amplifiers up to the top of the cabinet. In addition, cool air is drawn through the rear panel of the system and exhausted at the top of the cabinet. Solid State Power Amplifier The solid state amplifier consists of 2 stages of amplification using LDMOS technology. The amplifier is placed into operation by a circuit breaker switch located on the front of the power supply chassis. The signal from the upconverter is applied to the driver stage. The class A driver stage serves as a low distortion linear amplifier that increases the combined visual and aural signal roughly 13 dB. This signal is routed to the parallel configured final amplifiers. The signal is split equally between 2 amplifiers and recombined to produce 1000 watts of visual peak power and 100 watts of average aural power. The driver and final amplifier transistors receive 28 volts DC from the power supply. VSWR protection is provided in order that the transistors are not damaged from high reflected power operating conditions. Integral AC fans provide direct cooling air to the amplifier heatsinks to ensure that the heat is removed efficiently from the PA modules. The air filter on the fans should be examined and cleaned as necessary. The heatsink temperature is monitored and whenever it exceeds 64 degrees C, the front panel LED indicator is illuminated and the module shuts off. When the temperature decreases back to 53 degrees or less, the module automatically re-enables to the On state. Because the PA unit is broadband, it requires no tuning or adjustments. Two amplifiers are used to cover the entire UHF TV band. Power Supply The power supply architecture consists of 28 volt DC switching power supplies. The unit accepts 220 volts from a 50/60 Hz source. The output voltage is tightly regulated in order to eliminate any amplitude modulation on the output RF signal. Current limit protection is built in to the power supply should it accidentally encounter a very high current demand. The output voltage range is adjustable from 26 to 29 volts and is set by an adjustment located on the rear panel of the power supply. The power supply is cooled by internal fans. Power connections are made between the power supply and the power amplifier unit by mating plug connectors. RF Filter The RF filter is an 8 section bandpass filter designed to pass signals in the designated channel and reject all others. Connections for the RF input and output are made through 50 ohm Type N connectors. The number of sections of the filter does not permit field tuning of the filter without the use of a tracking generator and spectrum analyzer or network analyzer. The filter has approximately 1.0 dB insertion loss in the desired channel.

XL1000-PRO PARTS LIST PART NUMBERQUANTITYDESCRIPTION 4901011ADAPTER 7/16 FM/FM PANEL MF9189A1RF COMBINER MOUNTING BRACKET MF9190A1RF SPLITTER MOUNTING BRACKET BPW1KW-U81BANDPASS FILTER 8 POLE CA57001AC CABLE CA57051DC CABLE CA57101RF COAX CABLE--COMBINER TO FILTER CA57111RF COAX CABLE--FILTER TO OUTPUT U600LD-12600 WATT AMPLFIER MODULE UC1KW-11RF COMBINER/SPLITTER US200N1RF SPLITTER 1A00211EXHAUST FAN ASSEMBLY PS130-28A128 VOLT DC POWER SUPPLY MFA1KW-A1MAIN FRAME ASSEMBLY MF91781FRONT PANEL ½ RU MF91771FRONT PANEL 2RU 1A00231MAIN BREAKER PANEL 1A00224AMPLIFIER RF OUTPUT CABLE

TEST REPORT PINEAPPLE TECHNOLOGY INC. XL1000-PRO RETROFIT KIT TECHNICAL REPORT INTRODUCTION The following information is provided to support the technical performance of the XL1000-PRO Retrofit Kit for the Television Technology TV translator designated as the XL1000MU (modulator input version). The information is supplied for broadcast TV service according to applicable portions of Part 74 and the attached letter from the FCC OET office. The following information is provided in support of acceptance of the retrofitted transmitter for Part 74 service. Where possible, measurements were recorded of spectrum or other appropriate data of the signal in the RF path before and after the retrofit amplifier. 1. Power Output Measurements as indicated by FCC Rule Part 2.1046. 2. Visual Frequency response measurements of the translator to be within window specified by FCC Rule Part 74.750. 3. Occupied BW of aural signal specified by FCC Rule Part 2.1079. 4. Measurement of conducted harmonics and spurs +/- 3 MHz outside of channel as specified by FCC Rule Part 74.750. 5. Measurement of cabinet radiation of spurs and harmonics as specified in FCC Rule 2.1053 and 2.1057. 6. Measurements of voltage and current to final amp stage as outlined in FCC Rule 2.1033. Measurements of frequency response, occupied bandwidth, harmonics, and spurs have been executed and compared to the same measurements before the amplifier. The purpose of providing both sets of measurements is to indicate that the substitution of the PTI solid state amplifier did not degrade the performance of the translator and allows the translator to comply with the applicable rules and regulations of Part 74. Measurements were conducted at power output levels of 250 watts peak of sync and 1100 watts peak of sync and constitute the range of power for which type certification is sought. As indicated in the attached documentation from the FCC, the other parameters normally associated with Part 74 service such as frequency stability and receiver dynamic range do not apply to this application for certification. The test equipment used for the measurements on the next few pages is listed at the back of this exhibit. All test equipment had been calibrated prior to the use of the equipment by the supplier of the test equipment. RF Power Output The equipment was configured as below shown in Figure 1. The loss through the RF output cable and directional coupler and attenuator was calibrated at the Visual carrier frequency of 519.25 MHz. The NTSC generator was configured to produce a signal with 0 IRE video and sync. The audio generator was not energized. Visual power was read on the HP435B Power Meter and a reference level was established on the HP8595E Spectrum Analyzer. The TV demodulator was used to verify that sync compression was not causing distortion of the measurement. The aural output level was then raised to meet the precise 10 dB Visual/aural power ratio as observed on the spectrum analyzer. Pictures were also taken of demodulated video of the horizontal sync, and 2 fields of video to verify no signal distortions were present over the 250 watt to 1100 watt power level range that certification is being sought. Dashed lines indicate connection to 1 of the 3 pieces of equipment. CH A NTSC Gen Wavefor m mo nitor Mod ulator Translator under test Spectrum Analyzer Audio Gen Load TV Demod HP wattme ter Dir. Coupler CH B Figure 1 Power Output +16.6 dBm (average) indicated +41.6 dB (loss due to directional coupler, attenuator and cable) = 58.2 dBm (average) = 661 watts (average). Peak of sync power = 661 x 1.68 = 1110 watts POWER OUTPUT ON SPECTRUM ANALYZER (showing 10 dB V/A Ratio) Horiz. Sync (OUTPUT @1100 watts)

Horiz. Sync (OUTPUT @250 watts) Horizontal Sync (Input to amp)2 Fields (Input to amp)

Two fields (Output @ 1100 watts) Two fields (Output @ 250 watts) Frequency Response Frequency Response characteristics were measured using the equipment configured in Figure 1. A (sinX)/X waveform was used to generate a flat frequency response spectrum. The aural carrier was reduced as much as practical to be able to observe the spectrum but it was not possible to eliminate it. Measurements were recorded directly in the RF chain before the retrofit amplifier and after the retrofit amplifier at 250 watts and 1100 watts output power. Data is displayed with a 5 dB/division scale with the output spectrum overlayed on the input spectrum and separated by one vertical division. The data indicates the frequency responses are essentially identical. Thus the amplifier does not degrade the frequency response signal applied to the original translator. Measurements indicate the amplifier output response is within the 4 dB window as specified by FCC Rule 74.750. Output/ Input Frequency Response at 1100 watts output (5 dB/div)

Occupied Bandwidth The translator was operated at 1100 watts peak visual power and the aural signal was increased in power level to obtain a 10 dB ratio. An audio signal generator was connected to the modulator audio input and the frequency was adjusted to 10.396 kHz. The audio level was increased to obtain a Bessel null at the carrier frequency. The modulating frequency was changed to 15 kHz and the modulation was reduced to 85% and the spectrums were recorded. Output/ Input Frequency Response at 250 watts output (5 dB/div) Output at 1100 wattsOutput at 250 watts

Input Signal measured directly before solid state amplifier. The occupied bandwidth photos provide evidence of meeting FCC rule 2.1079. Conducted Harmonic and spurious signals The equipment was configured as shown in Figure 1.The translator was operated at 1100 watts peak power with a 10 dB visual/aural ratio. Measurements were recorded in the RF chain both before the retrofit amplifier and at the translator output. The figures beginning on the next page indicate the spurs outside the channel and harmonics present at the input of the retrofit amplifier. The top of the spectrum analyzer screen is the level of the fundamental signal (i.e. harmonics are ~ –40 dB on the input). The output cable and directional coupler were calibrated for loss at each spurious and harmonic frequency identified and the final harmonic/spurious values were calculated using the appropriate correction factors. All other harmonic or spurious products were >-80 dB and thus not recorded. The figures on the following pages indicate that the spurious components outside the channel and the harmonics meet the requirement outlined in 74.751(c). Adjacent channel spurious (input 2 nd Harmonic area spectrum (input) to amplifier)(Fundamental power is top of display)

Adjacent channel spurious 2 nd Harmonic area spectrum Output @ 250 watts peak Output @ 250 watts peak Adjacent channel spurious Output @ 1100 watts peak

2 nd Harmonic area spectrum 3 rd harmonic spectrum area Output @ 1100 watts peakOutput @1100 watts peak The figures shown above are harmonic and spurious measured at the translator output for power levels of 250 and 1100 watts peak. The only spectral components other than the spurs just outside the channel are harmonics of the visual and aural carriers . All other harmonic and spurious levels are >80 dB below rated output power. The harmonic levels are recorded in the table below. Output Power = 1100 watts peak sync Spectral FrequencyDisplayed ValueCorrected value* 510.25 MHz (Fv - 9)-70 dB-70 dB 514.75 MHz (Fv - 4.5)-68 dB-68 dB 1.038 GHz (Fv x 2)-63 dB-67 dB 1.046 GHz (Fa x 2)-66 dB-70 dB 1.557 GHz (Fv x 3)-68 dB-72 dB 1.571 GHz (Fa x 3)-70 dB-74 dB *Corrected for cable loss and coupling factor from the RF coupler and cable used in the test setup and notch filters at visual and aural carriers. Cabinet Radiation The translator and test equipment was configured as shown on the following page including the angles of measurement with respect to the translator cabinet. The photo on the subsequent page also shows the physical set-up of the test equipment and equipment under test. The translator was operated at 110% power with a 10 dB visual/aural ratio with the video input signal being a sync signal and 0 IRE “set-up” level. The free space path loss, cable loss, and antenna gain characteristics were obtained at the fundamental frequency and at each of the harmonics of the visual carrier frequency in order to accurately assess the level of the signal radiated from the cabinet. The cabinet was measured in 4 different physical rotation angles: 0, 90, 180, and 270 degrees (0 degrees being the front of the cabinet). All spectral components above -80 dB referenced to peak sync power radiated from the cabinet were recorded. Their values are tabulated in the table below the photos. Front Notch Filter Receiving Antenna NTSC Gen Wavefor m mo nitor Mod ulator Translator under test Spectrum Analyzer Load Figure showing Test setup for cabinet radiation. Cabinet was rotated to measure radiation from four angles. Foreground shows receiving antenna, notch filters, and spectrum analyzer.

Worst case measurement of cabinet radiation measured just outside channel (left photo) and at 2 nd harmonic area (right photo). Levels are tabulated below. All other levels were calculated below –80 dB relative to peak sync power and thus not tabulated. Output Power = 1100 watts peak sync Spectral FrequencyDisplayed ValueCorrected value* 514.75 MHz (Fv - 4.5)-49 dBm-63 dB 1.038GHz (Fv x 2)-60 dBm-68 dB 1.047 GHz (Fa x 2)-60 dBm-68 dB 1.03 GHz (2xFv-9)-64 dBm-72 dB 1.056 Ghz (2xFv+18)-68 dBm-76 dB *Corrected for cable loss, antenna gain, path loss and notch filters at visual and aural carriers and compared to Peak Sync power. Final Amplifier Voltage and Current Measurements Final amplifier voltage and current measurements were made with the translator operating at 1100 watts power output and at 250 watts output power. A video input signal of sync and 0 IRE “setup” level was used. Voltage measurements were made using a Fluke 77 meter and current measurements were made using the same meter with a FW Bell model C6-100A current probe. Peak Output Power = 1100 Watts Voltage = 27.8 volts Current = 88.0 amps Final amplifier power input = 2446 watts Peak Output Power = 250 Watts Voltage = 27.9 volts Current = 47 amps Final amplifier power input = 1311 watts Equipment List The following test equipment was used in the various test equipment configurations or to create calibration of equipment at various frequencies. All equipment was known to be in good working order and the supplier of the equipment stipulated the equipment was within the calibration period. EQUIPMENT MODELSERIAL NUMBER Cadco M-369 TV modulatorK2579 Cadco 375 demodulatorC5013 HP 8585E Spectrum Analyzer3523A01399 HP 435B Power Meter2702A14412 HP 3525A Signal Generator2846A01312 HP 200 CD Audio Generator0960A86012 Tektronix TSG90 Video signal generatorB022622 Tektronix 175…

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