BZ5MXD5UDigital Television Broadcast Translator

MXD5U AMPLIFIER TECHNICAL SERVICE MANUAL LARCAN INC. 228 AMBASSADOR DRIVE MISSISSAUGA, ONTARIO CANADA L5T 2J2 PHONE: (905) 564-9222 FAX: (905) 564-9244 EMAIL: [email protected] PUB09-03 Rev 0 16 April, 2009 MXD5U OPERATIONS AND MAINTENANCE CONTENTS 1 AMPLIFIER ......................................................................................................................................................................1 2 CONTROLLER .................................................................................................................................................................2 2.1 CONTROL BOARD ASSEMBLY AND JUMPER SETTINGS..................................................................................................2 2.2 REMOTE CONTROLS AND THE MXD5U FRONT PANEL ON/OFF BUTTON....................................................................4 2.3 EXTERNAL REMOTE CONTROL CONNECTIONS..............................................................................................................6 2.3.1 Remote Command Inputs .....................................................................................................................................6 2.3.2 Remote Telemetry Outputs ...................................................................................................................................6 2.3.3 Remote Status Outputs .........................................................................................................................................7 2.3.4 External1 Interlock ..............................................................................................................................................7 2.4 EXTERNAL TRANSMITTER INTERLOCK.........................................................................................................................8 3 AMPLIFIER INSTALLATION AND STARTUP ..........................................................................................................9 3.1 BEFORE APPLYING AC TO THE UNIT............................................................................................................................9 3.2 APPLYING AC TO THE UNIT..........................................................................................................................................9 3.3 BEFORE TURNING THE AMPLIFIER ON .........................................................................................................................9 3.4 AMPLIFIER ON SEQUENCE..........................................................................................................................................10 3.4.1 Turning ON the Amplifier.................................................................................................................................10 4 TEST AND TROUBLESHOOTING .............................................................................................................................11 4.1 BENCH TEST PROCEDURES.........................................................................................................................................11 4.1.1 Front-End Module Bench Test Procedure .........................................................................................................11 4.1.2 IPA1 Bench Test Procedure ...............................................................................................................................11 4.1.3 Pallet 21B1751 Bench Test Procedure ..............................................................................................................11 4.2 BASIC TROUBLESHOOTING TECHNIQUES....................................................................................................................12 4.2.1 Amplifier Completely OFF.................................................................................................................................12 4.2.2 No RF Output.....................................................................................................................................................12 4.2.3 Output Reduced to 25% .....................................................................................................................................12 5 MAINTENANCE.............................................................................................................................................................13 5.1 DAILY.........................................................................................................................................................................13 5.2 MONTHLY...................................................................................................................................................................13 5.3 SEMI-ANNUALLY AND ANNUALLY.............................................................................................................................13 5.4 TRANSMITTER COOLING SYSTEM...............................................................................................................................13 6 TEST EQUIPMENT SETUP..........................................................................................................................................14 7 SPECIFICATIONS .........................................................................................................................................................15 7.1 ELECTRICAL...............................................................................................................................................................15 7.2 ENVIRONMENTAL.......................................................................................................................................................15 7.3 COOLING....................................................................................................................................................................15 7.4 DIMENSIONS...................…

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

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator FCC Label/Label Location

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Interior Photo of RF Amplifier

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Operational Description: This application requests certification for a 5 Watt Digital Television Translator. The intended use of this digital translator is to rebroadcast a television relay station or other legal source of ATSC digital television signal. The MXD5U is a solid state digital regenerative translator designed to receive over-the- air ATSC signals, converting the RF signal to baseband digital format, processing the signal to eliminate noise, and then re-modulating, converting to the new broadcast channel, amplifying and filtering the signal before it is applied to the transmit antenna. The receive section of the translator and the output modulation format conform with FCC Part 73.682(d), ATSC Digital Television Standards. The MXD5U consists of three components: a 1RU RegenT Transcoder unit which receives processes and re-modulates the signal, a 2 RU RF amplifier, and an output filter. The power supply and amplifier are integral. The translator meets all FCC requirements for both the simple emissions mask and the stringent emissions mask. The output filter along with additional filtering within the amplifier provide more than 85dB of attenuation within the GPS Frequency bands (1164- 1240 MHz and 1559-1610 MHz). Note that since these products are frequency agile in that they can be field tuned for different channels within the UHF television band, each unit has this filtering included, regardless of the channel. Testing results shown in this document were conducted on channel 27 (551 MHz center frequency) with the exception of the frequency stability testing which was conducted on channel 34 (650MHz). These test results are representative of performance on any channel in the UHF broadcast spectrum. 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.

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Parts List and Tune-up Procedure/Active Devices: The following is the procedure for changing the channel of the MXD5U 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 AC 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 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): BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Parts List and Tune-up Procedure Mask Filter: Bandpass Response BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Parts List and Tune-up Procedure Mask Filter: Return loss BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Active Devices List: ID Component Description Qty UM Total 41D2225A1 ASSY MX5U 0EA 0 21B1473G3 FR END ASSY GAIN=13dB VDC=28 1 EA 1 Q1 MMBT2222ALT1 TRANSISTOR, MOTOROLA "1P" 1 EA 1 U1 MHW9182 IC HYBRID AMP MOTOROLA 1 EA 1 U3 MC78M12CDT IC SEE 78M12CDT 1 EA 1 U4 MC78L05ACD IC REGULATOR 100mA SOIC-8 1 EA 1 21B1951G1 IPA ASSY 1 EA 1 U1 MC1723CD VOLTAGE 1 EA 1 Q3 MMBT2907ALT1 TRANSISTOR PNP MOTOROLA 2FE 1 EA 1 CR100 MMBD7000LT1 DIODE DUAL GENERAL PURPOSE 1 EA 1 CR110 MMBD7000LT1 DIODE DUAL GENERAL PURPOSE 1 EA 1 CR1 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 Q1 MRF282SR1 RF POWER LDMOS FET 1 EA 1 Q2 MRF282SR1 RF POWER LDMOS FET 1 EA 1 21B1751G2 SINGLE PALLET AMP. MRF374A R-7 1 EA 1 Q1 MRF374A TRANSISTOR 1 EA 1 U1 MC78M09CDT IC VOLTAGE REG. 1 EA 1 31C1971G1 PCB CTRL'R MX5U 1 EA 1 CR1 1SMB9.0AT3 Zener Diode 9V sm 1 EA 1 CR2 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA 1 CR3 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR4 1SMB5.0AT3 DIODE 1 EA 1 CR5 1SMB5.0AT3 DIODE 1 EA 1 CR6 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA 1 CR7 1SMB5.0AT3 DIODE 1 EA 1 CR8 1SMB5.0AT3 DIODE 1 EA 1 CR9 1SMB5.0AT3 DIODE 1 EA 1 CR10 MBRS130LT3 Schottky Pwr Rectifier 1 EA 1 CR11 MBRS130LT3 Schottky Pwr Rectifier 1 EA 1 CR12 MBRS130LT3 Schottky Pwr Rectifier 1 EA 1 CR13 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR14 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR15 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR16 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR17 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR18 MURS120-T3 DIODE 1A 200V MARK U1D ONSEMI 1 EA 1 CR19 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA 1 U1 MC68HC908GT16CFB IC Microcontroller 1 EA 1 U2 MAX3110EEWI UART, -40°C to +85°C 28 Wide 1 EA 1 U3 MOCD207 IC DUAL OPTO NAND S.M. 1 EA 1 U4 LM324D IC QUAD OP AMP SOIC 14 1 EA 1 U5 LM311M IC Comparator 1 EA 1 U6 MMPQ2222A TRANSISTOR NPN S.M. 1 EA 1 U7 MAX5082ATE+ CONVERTER STEP-DOWN DC-DC 4.5-40V 1.5A 1 EA 1 BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator ID Component Description Qty UM Total U8 MOCD207 IC DUAL OPTO NAND S.M. 1 EA 1 U9 HXS 20-NP Current Transducer 1 EA 1 U10 MMPQ2222A TRANSISTOR NPN S.M. 1 EA 1 U11 MAX5097AAUP+ Buck Converter 1 EA 1 U13 LM324D IC QUAD OP AMP SOIC 14 1 EA 1 U14 LM324D IC QUAD OP AMP SOIC 14 1 EA 1 U15 LM324D IC QUAD OP AMP SOIC 14 1 EA 1 U16 MMPQ2222A TRANSISTOR NPN S.M. 1 EA 1 U17 LM324D IC QUAD OP AMP SOIC 14 1 EA 1 U18 74HC00AD IC QUAD 2 INPUT NAND S.M. 1 EA 1 U19 LM324D IC QUAD OP AMP SOIC 14 1 EA 1 U20 XP1001001-03R ETHERNET 1 EA 1 VR1 78L05ACD Voltage Regulator Motorola 1 EA 1 VR2 MC34064P5 MONITOR I.C. 1 EA 1 VR3 MC7805BDT Voltage Regulator 5V 1A ONSemi 1 EA 1 11A2195G4 UHF DIR CPLR DETR ASSY FLNG 1 EA 1 CR1 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA 1 CR2 HSMS-2820 DIODE SCHOTTKY HP MARM CO 1 EA 1

MXD5U OPERATIONS AND MAINTENANCE Figure 9 - Front End Amplifier, MXD5U PUB09-03 Rev 0 April 16, 2009 09-03-16 MXD5U Operations and Maintenance MXD5U OPERATIONS AND MAINTENANCE Figure 10 - IPA Assembly, MXD5U PUB09-03 Rev 0 April 16, 2009 09-03-17 MXD5U Operations and Maintenance MXD5U OPERATIONS AND MAINTENANCE PUB09-03 Rev 0 April 16, 2009 09-03-18 MXD5U Operations and Maintenance Figure 11 - Amplifier Pallet, MXD5U MXD5U OPERATIONS AND MAINTENANCE PUB09-03 Rev 0 16 April, 2009 09-13-19 MXD5U Operations and Maintenance Figure 12 MXD5U Control Board Assembly MXD5U OPERATIONS AND MAINTENANCE NOTES PUB09-03 Rev 0 16 April, 2009 MXD5U Operations and Maintenance

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Attenuation Characteristics

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Frequency Drift versus Temperature Readings Calculation Pilot Frequency Deviation% from ref. Temp (°C) VAC= 102120138(Hz) -30 65030735565030740065030731857040.00087712 -20 65031066265031066265031066223600.00036290 -10 6503125896503125896503125894330.00006658 0 6503133596503133596503133593370.00005182 10 65031407265031407265031407010500.00016146 20 65031302265031302265031302200.00000000 30 65031175765031176765031175012720.00019560 40 65031071165031075065031072123110.00035537 50 65031003765031003765031003729850.00045901 60 65031077565031077565031077522470.00034553 Test Setup for Frequency Stability measurements. Test Equipment List: Thermostatically controlled Temperature Chamber – Cincinnati Sub-Zero HP 8594E Spectrum Analyzer S/N: 3303A00399

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Power Measurements The translator’s power meter circuit uses a detected sample from a coupler on the output. An averaging detector circuit provides the DC level to drive the translator’s output level meter. The translator was connected to a test load through a calibrated directional coupler. The spectrum analyzer’s “Channel Power” function was used to measure the average power level of the signal as sampled through the directional coupler. (see Fig.) . Measured power: 8.8 dBm Coupling loss: 28.2 dB Attenuator @ i/p to spectrum analyzer 0 dB Power: 37 dBm Power = 5 Watts

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Cabinet Radiation BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Cabinet Radiation

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Spurious Emissions (Simple Mask) BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Spurious Emissions (Stringent Mask) BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Spurious Emissions

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Digital Signal: Eye Diagram/Signal to Noise Ratio/Error Vector Magnitude BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Digital Signal: Group Delay/Frequency Response

BZ5MXD5U Application for FCC Certification 5 Watt Digital Television Translator Test Setup Photo: Block Diagram of Test Setup: Test Equipment: Instrument Make/Model Serial # Last Cal. Date. Spectrum Analyzer HP8594E 3303A00399 Dec. 3, 2003 Signal Analyzer Tektronix RFA300 B010126 Feb. 6, 2003 RF Network Analyzer Agilent 8712ET US40371604 Mar. 6, 2000