BZ5MXI401UXHeterodyne Processor Input Television Translator

LARCAN U.S. Tel: 1-303-665-8000 Fax: 1-303-673-9900 Canada Tel: 1-905-564-9222 Fax: 1-905-564-9244 www.larcan.com Email: [email protected] 228 Ambassador Drive Mississauga ON Canada L5T 2J2 August 24, 2007 Stanley Lyles FCC Application Processing Branch Office of Engineering and Technology Re: FCC ID BZ5MXI401UX; Correspondence Reference Number: 33634 Dear Sir: With regards to the questions posed: 1) The second line item to be added to the grant for the 50 Watt Aural RF power should read: Frequency Range Output Watts Frequency Tolerance Emission Designator 407-608MHz, 614-806MHz 50 0.002% 250KF3E 2),3) With regard to our request for confidentiality, we formally request confidentiality for exhibits including the service manuals and schematics documents submitted as part of this application. While these documents do not contain design-specific or IP information, they are typically offered for sale as an optional part of the product and are not available in the public domain, since these items represent a source of revenue for the company. 4) Please revise the form 731. This is an oversight on our part. a) Tests were done on channel 39 with the exception of frequency stability tests, performed on channel 60. We feel that these are sufficiently representative of the performance of this product at any frequency/channel. b) As detailed in the Parts List and Tune-up Procedure exhibit, no component changes other than the re-tuning of the output bandpass filter are required for operation on any channel within the product’s frequency range. I hope that this addresses the items of concern with this submission and will allow further processing of this application. Should you have any further concerns, please do not hesitate to contact me. Sincerely, John Tremblay V. P. Engineering LARCAN U.S. Tel: 1-303-665-8000 Fax: 1-303-673-9900 Canada Tel: 1-905-564-9222 Fax: 1-905-564-9244 www.larcan.com Email: [email protected]

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Exterior Photo

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator FCC Label/Label Location

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Interior Photo of Amplifier Section

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Operational Description This application requests authorization for a video/audio input driven 500 Watt translator, BZ5MXI401UX. The translator is driven directly by a color television Heterodyne processor. The intended use of the MXI401U is to rebroadcast a television relay station or other legal source of video and audio. The MXI401U is a solid state translator designed to operate a 500W sync peak visual RF power and 50W average aural single carrier RF power. The MXi401U consists of four components: a 1RU modulator, a 3 RU RF amplifier, a 3 RU Power supply for said amplifier and an output filter. The power supply and amplifier employ integral cooling fans. The simplicity of design, the employment of modular subassemblies and the use of standard components also enhance serviceability. The specific unit tested for this application was on channel 39, with the exception of frequency stability measurements which were conducted on channel 60. The Heterodyne Processor section of this translator will accept an off-air signal from the television relay station, frequency spacing, deviation and other characteristics including distortion are therefore determined for the most part by the originating television station. No provision is made for tampering with or adjustment of the composite video or audio signal except for the depth of video and audio modulation. The MXI401U meets all requirements for unattended operation. A description of the automatic shutdown and control circuitry can be found in the user’s manual. Station identification requirements will be supplied by the originating station. Wiring, shielding and construction are in accordance with accepted principles of good engineering practice. The translator’s construction is such that all hazardous components are enclosed or protected against accidental contact by operating personnel.

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Parts List and Tune-up Procedure/Active Devices: The following is the procedure for changing the channel of the MXi401U translator. Since the amplifier is broadband, channel change involves retuning of the output filter and recalibration of the output meter. The amplifier meter was calibrated to read 100% (top scale) at full power and at the channel specified when the transmitter was tested at the factory. If the amplifier is to operate at a channel other than that of the factory test channel, the metering will require re-calibration. The power meter setting is a channel dependent calibration. 1. Connect the transmitter output to a 50 ohm dummy load or the antenna. The transmitter uses a 50Ω type N connector for its output. Calibrated directional coupler and suitable digital wattmeter should be used for measurements. 2. Connect the 208VAC mains input. This AC circuit should be rated for 15 amperes, and should be supplied through a slow-tripping breaker or time delay fuse. Generally, a breaker that is rated for across-the-line motor starting will be found to be satisfactory. Connect the power supply to the amplifier. 3. At this point the LCD screen should be illuminated, and the transmitter should be OFF. Depress the ON’ switch. The green LEDs should illuminate and the amplifier should be operating. The cooling fans on both the power supply and the amplifier should be running. 4. Attach the RF output power measuring device. 5. Turn down the drive level from the Transcoder (front end) before applying any RF input signal. 6. Slowly turn up the drive level until the output power reaches the desired level (on the power measuring device – not the transmitter power meter indication). 7. When the output power is at the desired level check that the voltage at TP3 (control PC board) is between 4.5V and 9.0VDC. 8. Adjust R48 until the voltage at TP3 is 4.0VDC. At this point the transmitter forward power meter should read 100%. 9. To calibrate the reflected power, install the jumper E17 (prevents VSWR trips). 10. Remove the cable from J12 at the control board and reconnect through a 10dB attenuator to J13. 11. The voltage measured at TP4 should be beterrn 4.5V and 9.0VDC. 12. Adjust potentiometer R80 until the voltage at TP5 is 4.0VDC. At this point the reflected power should read 10%. 13. Reconnect the cables as they were, and remove jumper at E17. The output filter must be retuned as per the frequency response sweeps attached (note: two different tunings depending on the type of filter used): BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Parts List and Tune-up Procedure Filter: Bandpass Response BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Parts List and Tune-up Procedure Filter: Return loss BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Active Devices List: ID Component Description Qty UM 41D2109G1 MXi 401U ASSEMBLY INFINEON 1 EA 31C1897G1 MXI CONTROLLER 1 EA CR1 1SMB9.0AT3 Zener Diode 9V sm 1 EA CR2 1SMB5.0AT3 DIODE 1 EA CR3 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR4 HSMS-2800 DIODE SCHOTTKY HSMS-2800L30 1 EA CR5 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA CR6 1SMB5.0AT3 DIODE 1 EA CR7 MMSZ4678T1 DIODE ZENER 1.8V SM MKG-CC 0 EA CR8 HSMS-2800 DIODE SCHOTTKY HSMS-2800L30 1 EA CR9 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA CR10 1SMB5.0AT3 DIODE 1 EA CR11 MMSZ4678T1 DIODE ZENER 1.8V SM MKG-CC 0 EA CR12 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR13 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR14 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR15 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR16 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR17 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA CR18 HSMS-2800 DIODE SCHOTTKY HSMS-2800L30 1 EA Q1 BC847BT/R TRANSISTOR, NPN 1 EA Q2 BC859CT/R TRANSISTOR, PNP 1 EA Q3 BC847BT/R TRANSISTOR, NPN 1 EA Q4 BC859CT/R TRANSISTOR, PNP 1 EA Q5 BC847BT/R TRANSISTOR, NPN 1 EA Q6 BC859CT/R TRANSISTOR, PNP 1 EA Q7 BC847BT/R TRANSISTOR, NPN 1 EA Q8 2N4351 TRANSISTOR FET N-CH SW 1 EA Q9 BC847BT/R TRANSISTOR, NPN 1 EA U1 MC68HC908GT8CFB IC Microcontroller 0 EA U1 MC68HC908GT16CFB IC Microcontroller 1 EA U2 MAX3110EEWI UART, -40°C to +85°C 28 Wide 1 EA U3 MOCD207 IC DUAL OPTO NAND S.M. 1 EA U4 MOCD207 IC DUAL OPTO NAND S.M. 1 EA U5 LM358D IC DUAL OP AMP SOIC 8 MOT 1 EA U6 MMPQ2222A TRANSISTOR NPN S.M. 1 EA U7 LM324D IC QUAD OP AMP SOIC 14 1 EA U8 MOCD207 IC DUAL OPTO NAND S.M. 1 EA U9 HXS 20-NP Current Transducer 1 EA U10 MMPQ2222A TRANSISTOR NPN S.M. 1 EA U11 LM339D IC COMPARITOR 1 EA U12 MOCD207 IC DUAL OPTO NAND S.M. 1 EA U13 LM324D IC QUAD OP AMP SOIC 14 1 EA U14 LM324D IC QUAD OP AMP SOIC 14 1 EA U15 LM324D IC QUAD OP AMP SOIC 14 1 EA BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator ID Component Description Qty UM U16 DS1867S-10 IC POT W/EEPROM DUAL 10K 16-SO 1 EA U17 LM324D IC QUAD OP AMP SOIC 14 1 EA U18 74HC00AD IC QUAD 2 INPUT NAND S.M. 1 EA U19 LM324D IC QUAD OP AMP SOIC 14 1 EA U20 LM358D IC DUAL OP AMP SOIC 8 MOT 1 EA VR1 78L05ACD Voltage Regulator Motorola 1 EA VR2 MC34064P5 MONITOR I.C. 1 EA VR3 MC7805BDT Voltage Regulator 5V 1A ONSemi 1 EA 21B1473G5 FRONT END (FOR DTV DRIVER) 1 EA Q1 MMBT2222ALT1 TRANSISTOR, MOTOROLA "1P" 1 EA U1 MHW9182 IC HYBRID AMP MOTOROLA 1 EA U2 LM358D IC DUAL OP AMP SOIC 8 MOT 1 EA U3 MC78M12CDT IC SEE 78M12CDT 1 EA U4 MC78L05ACD IC REGULATOR 100mA SOIC-8 1 EA CR1 BB811 DIODE VARACTOR 1 EA CR2 BB811 DIODE VARACTOR 1 EA CR3 HSMS-2850 DIODE HEWLETT PACKARD 1 EA 21B1951G1 IPA ASSY 1 EA U1 MC1723CD VOLTAGE LM723CD 1 EA Q3 MMBT2907ALT1 TRANSISTOR PNP MOTOROLA 2FE 1 EA CR100 MMBD7000LT1 DIODE DUAL GENERAL PURPOSE 1 EA CR110 MMBD7000LT1 DIODE DUAL GENERAL PURPOSE 1 EA CR1 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA Q1 MRF282SR1 RF POWER LDMOS FET 1 EA Q2 MRF282S…

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BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Spurious Emissions BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Spurious Emissions

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Cabinet Radiation BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Cabinet Radiation

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Frequency Drift versus Temperature. READINGS CALCULATION LOCAL OSC'R FREQ (MHZ) DEVIATION FROM REF TEMP (DEG C) VAC= 187 220 253 (MHz) (%) 20 (REF) 747.249300 747.249300747.2493000.000000 0.000000 -30 747.243800 747.243800747.2438000.005500 0.000736 -20 747.247500 747.247500747.2475000.001800 0.000241 -10 747.248220 747.248220747.2482200.001080 0.000145 0 747.249135 747.249135747.2491350.000165 0.000022 10 747.249165 747.249165747.2491650.000135 0.000018 20 747.249277 747.249277747.2492770.000023 0.000003 30 747.249830 747.249830747.2498300.000530 0.000071 40 747.250350 747.250350747.2503500.001050 0.000141 50 747.251102 747.251102747.2511020.001802 0.000241 Test Setup Block Diagram Test Equipment List: Frequency Counter – Hewlett Packard HP5385A S/N 3242A07335 Thermostatically Controlled Temperature Chamber – Cincinnati Sub-Zero

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Power Measurements The translator’s visual power meter circuit uses a detected sample from a directional coupler on the output. A peak detector provides the DC level to drive the translator’s output level meter. The translator was modulated with a sync and blanking signal only and the power output adjusted to 298 W average, corresponding to a peak envelope sync power of 500 W. The translator is capable of compliance with the specification for the range 50 W to 500 W and is capable of delivering rated power output at 10% above or below rated AC input voltage. The aural carrier output power was measured unmodulated into the dummy load and is not less than 10% or more than 20% of the rated output power of the visual carrier. The tests were performed with aural power adjusted to 50 W and verified using a spectrum analyzer to compare the relative level with that of the visual carrier. The power output of the transmitter is adjustable to at least 10 dB below rated power output. Measured TX Current Power Meter (Thru-Line Meter) Visual Carrier Only 298W 49.3 Amps Visual + Aural Carrier 320W 51.5 Amps The DC voltage across all output devices is 32 Volts

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Video Waveforms BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Video Waveforms

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Group Delay Characteristics Frequency (MHz) Delay (ns) 0.20 -80 0.50 -50 1.00 -82 1.50 -47 2.00 -35 2.50 -55 3.00 -65 3.58 -155 4.18 -280

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Attenuation Characteristics Frequency (MHz) Amplitude -0.50 -1.0 Carrier 0 (ref) 0.50 1.5 1.00 2.0 1.50 2.0 2.00 2.5 2.50 1.75 3.00 1.5 3.50 0.5 3.58 0 4.00 0

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator AGC Performance The input to the translator was varied from nominal by -15dB/+25dB. The output variation is listed below. Input (dB from Nominal) Output (dB from Nominal) -15dB 0 -10dB -0.1 -5dB -0.1 0dB (ref. 70dBuV input) 0 (ref) +5dB 0 +10dB 0 +15dB 0 +20dB -0.1 +25dB -0.1

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Input Frequency Response The translator was swept with a modulated CW signal equivalent to 500W sync peak. Three different input levels (70dBuV nominal and ± 15dB) were applied. The figures shown below demonstrate the output bandpass under the different input signal conditions. They show essentially no change of bandpass due to varying input signal level conditions. Nominal: BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Input Frequency Response Nominal -15dB: Nominal +15dB:

BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Test Setup Block Diagram Translator Video Test Setup Translator Audio Test Setup BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Test Equipment List: Instrument Make/Model Serial # Last Cal.Date Spectrum Analyzer HP8591E 3308A01099 Apr 19 2007 Sideband Adapter Tek 1405 B041096 Apr 23 2002 Video Test Set Tek VM700A B030848 Feb 24 2004 Waveform Generator Tek 1910 B023149 Oct 14 2004 Audio Generator Tek ASG100 B010581 Aug 01 2004 Frequency Counter HP5385A 2730A04405 Aug 08 2004 TV Test Receiver EFA 2067.3004.93 Jul 03 2005 Mod Meter HP 8901A 2142A04405 May 09 2004 Power Meter Agilent E4418B 4196 Aug 22 2006 Modulator General Instruments C8M-H J1B7000028957N/A BZ5MXI401UX Application for Certification Heterodyne Processor Input 500 Watt UHF Translator Test Setup Photo