QFOT1L Headend Rack Mounted Optical Transmitter User Manual Pdf
Contents
1. b Carefully unplug or unscrew the active fiber connector from the adapter while being careful to avoid aiming the fiber connector at any human body or eye Usea lint free fiber optic wipe saturated with alcohol to clean the connector carefully Once finished still wait 1 to 2 minutes until active connector surface is dry in the air d When the cleaned optical active connector is reconnected to the adapter please do not over tighten or force the connector to avoid damage to the ceramic ferrule e The fiber connector should be cleaned on both ends If optical power is still low after clean cleaning the other end of the fiber is recommended If the optical power is still low after cleaning both ends it is recommended that you clean the inner adaptor f Use compressed air or a lint free wipe to wash the adapter carefully When using compressed air aim the nozzle at the ceramic ferrule of the adaptor cleaning the ferrule with compressed air NOTES 1 Avoid aiming the optical output or fiber connector at the human body or eyes 2 Assemble the fiber adaptor gently and carefully to prevent damage to the ceramic ferrule inside the adapter Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 8 1 8 CLEANING 8 MAINTENANCE Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 9 AFTER SALE CUSTOMER SERVICE AF2. DFB laser decreases when decreases the RF level to the DFB laser increases Therefore the user can decrease or increase the optical modulation index OMI of this transmitter When changing the value it is suggested to observe the RF performance at the front panel 20 dB test port or the RF port of an optical receiver linked with this transmitter The recommended MGC value of the transmitter is attached on the side of the transmitter along with the transmitter serial number Re measure optical output power make sure that optical output power being normal remove standard fiber test jumper and optical power meter connect the equipment to network and end the installation 7 2 Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 8 CLEANING 8 MAINTENANCE CLEANING amp MAINTENANCE 8 Cleaning amp Maintenance Each fiber connector can become contaminated by dust or dirt in the operation process which can result in increased optical link loss or a degraded carrier to noise ratio If you find that the optical receive power or RF output level of the optical receiver has declined you should clean and maintain the fiber optic connector The clean methods are recommended below Adapter Optical Transmitter Inside s China Tube Fiber Active Connector Fiber Active Connector For safety reasons the AC power to the transmitter should be turned off first
3. INSTALLATION amp ADJUS EMEN 5i entra non rna ra guo dona nia SE Ra aam an hara ra as so 7 1 TAS Opening the Coven iano iena eee hes 7 1 7 2 SupplieS amp Tools iie ia iude p de sente ie e aia da Agi 7 1 17 3 installation c ce el ia 7 1 GLEANING amp MAINTENANGE nnne tanda a es ice 8 1 AFTER SALE CUSTOMER SERVICE cuccia E iii iii 9 1 TROUBLESHOOTING nnana eira i A 10 1 SERVICE amp SUPPORT creek cisl 11 1 11 1 Contact ATX 11 1 11 2 Warranty Information eicere AEREA a la i 11 1 Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 1 1 Preface This manual is designed for QFOT1L series 1310nm optical transmitter along with description of product feature specification installation adjustment and troubleshooting To install this transmitter successfully and use it safely users should read this manual carefully before installation and perform the installation and adjustment according to this manual Please contact ATX Networks if any question Important User Information e Caution Invisible laser radiation is emitted from the fiber output ports wh
4. CARRIER TO NOISE RATIO MGC CONTROL RANGE POWER VOLTAGE POWER CONSUMPTION OPERATION TEMPERATURE STORE TEMPERATURE RELATIVE HUMIDITY DIMENSIONS WEIGHT NOTE Test link consists of the QFOT1L transmitter 10 Km standard fiber attenuator and standard optical receiver Input RF channels are 59 PAL D channels equivalent to 77 NTSC channels The optical receiver input power is 1 dBm VALUE am 20m 1310nm 20 DFB Laser with Isolator Direct Modulation SC APC 47 1000 MHz 15 25 dBmV 0 75 dB 750 16 dB from 47 1000 MHz gt 67 dB gt 62 dB gt 51 dB 1dB 2dB 4 dB 16 dB 100 240 VAC 50 60 Hz 20W 0 C to 50 C 32 F to 122 F 40 C to 85 C 40 F to 185 F Max 95 Non condensing 1 75 H x 19 0 W x 12 8 D 4 45H x 48 26W x 32 51D cm 11 0 Ibs 5 0 kg Test Condition 77 channels NTSC signal to optical transmitter C CTB C CSO and C N at 1 dBm optical input 10 km fiber optical attenuator measured at standard optical receiver with 36 dBmV RF output Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 5 1 5 SPECIFICATIONS 5 3 Optical Link C N Table OPTICAL LINK PATH C N SPECIFICATIONS OPTICAL LOSS dB 4 5 6 7 8 9 10 11 QFOT1L 04 QFOT1L 06 53 0 QFOT1L 08 QFOT1L 10 QFOT1L 12 QFOT1L 14 QFOT1L 16 QFOT1L 18 QFOT1L 20 50 0 49 0 5 2 Q Series Optical QFOT1L Series Optical Transm
5. Q SERIES Optical QFOT1L 1310nm DFB Fiber Optic Transmitter Installation amp Operation Manual FOTIL Although every effort has been taken to ensure the accuracy of this document it may be necessary without notice to make amendments or correct omissions Specifications subject to change without notice Q Series is a registered trademark of ATX in the United States and or other countries Products or features contained herein may be covered by one or more U S or foreign patents Other non ATX product and company names in this manual are the property of their respective companies 10 11 5 PREFACE signi aaa 1 1 OVERVIEW alia 2 1 FEATURES 3 1 FUNGTIONAL DIAGRAM uu aci 4 1 SPECIFICATIONS vo na ia ex ia 5 1 5 1 Link Iest GOndillOD ss cito cus A A xe ara 5 1 5 2 Specifications Table iret rete nS OY Tees Yee oe 5 1 5 3 0 iiit ie tese Pee Eee ese REDE EAR Es al AR 5 2 FUNCTION GUIDE 5 na aao aa a nya do Fan RD aa add 6 1 6 1 ErotitPalieliGulde i 6 1 6 2 Rear Panel Guid dE Wises Aia 6 1
6. TER SALE CUSTOMER SERVICE 9 After sale Customer Service a Ifthe equipment has failed please contact ATX immediately b Do try to attempt to repair the problem without the help from a ATX technician c NOTE There are adhesive tape seals on both sides of the case Any unauthorized removal of this tape seal by the user will void the 1 year warranty Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 9 1 9 AFTER SALE CUSTOMER SERVICE Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 10 TROUBLESHOOTING TROUBLESHOOTING 10 Troubleshooting SYMPTOM FAULT ACTION No LED display after turning on the power After turning on power LED normal but optical output power low After connecting to network all TV channels are noisy After connecting to network only some TV channels have a degraded SNR After connecting to network some TV channels have obvious ripple beats lines or distortions No input power or a problem with the internal switching power supply Check jumper quality Contaminated optical active Damaged ceramic ferrule in adapter Low received optical power causing poor C N RF input level too low for sufficient laser modulation System link path C N too low Back reflection from bad or dirty optical connectors Some channels SNR too low Optical input power
7. ich may cause permanent injury to skin or eyes e Ground first before turning on the power Grounding resistance should be less than 4 Ohm so as to prevent laser and user from static damaging UPS power supply and air conditioned environment are highly recommended for the stable and long time transmitter operation DANGER INVISIBLE LASER RADIATION 15 EMITTED FROM THE END OF FIBER OR CONNECTORS INVISIBLE LASER RADIATION Avoid direct exposure to beam 2 Wavelength 1 5 Do not view beam directly with Max Output 30 mW optical instruments Class 1 Laser Product Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 1 1 1 Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 2 OVERVIEW 2 Overview QFOT1L is 1310nm DFB laser transmitter delivering TV signal digital TV signal telephone voice signals and data signals over long distance fiber cable for CATV networks The product utilizes a high performance cooled DFB laser RF gain manual control along with RF pre distortion circuit Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 2 1 2 OVERVIEW Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 3 FEATURES 3 Features e High performa
8. ital multimeter in accordance with power requirement Then turn on power Connect standard fiber test cable to the transmitter s optical signal output Measure the output optical power and confirm that the output optical power is the close to the value tested from Optical Power Test Port in the front panel When measuring the optical power make sure that optical power meter is set at 1310nm wavelength and that fiber test jumper is clean d Measure the input RF signal level with a Cable TV meter or a spectrum analyzer making sure that input RF signal is in the range of 15 to 25 dBmV The recommended RF Input Level vs NTSC channel number Channel Number Input RF dbmV At this time you can connect the RF signal to the RF input port of this transmitter The front panel RF LED turns to green On the front panel there is a 5 digit manual controller which controls the built in digital RF attenuator The attenuation value is The total attenuation number is the sum of all 5 digits For example 10101 represents value of 0 2 dB 0 8 dB 0 10 dB Since the effective MGC range is 15 dB it is recommended that 5th digit should be kept in the ON position while the first 4 digit combinations give the value from 0 dB to 15 dB Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 7 1 CHAPTER 7 INSTALLATION amp ADJUSTMENT When increases the RF level to the
9. itter Installation amp Operation Manual CHAPTER 6 FUNCTION GUIDE FUNCTION GUIDE 6 Function Guide 6 1 Front Panel Guide QFOT1L Optical Transmitter 2008 TEST ou 6 2 o N 10 11 12 13 Front View Power LED When AC power is ON the Power LED is green RF LED When input RF level is higher than 10 dBmV RF LED is green Laser LED When there is a laser output the Laser LED is green Laser Power Test Port When Laser LED is green user can test the optical output power at this port via digital meter Each 0 2V DC voltage represents 1mW optical output power Manual Gain Control Dip Switch Controls digital attenuator to increase or decrease RF level into laser RF Input Test Port Standard 75 Ohm style F style test port for RF signal on line test Level tested from this port is 20 dB lower than the actual RF drive level to the laser Rear Panel Guide 7 9 10 11 12 13 Rear View Case Grounding Nut Provided for optionally connecting the transmitter to ground RF Input Port Standard 75 Ohm American style F port used for connecting RF signal and the equipment Level in this input port must be at the range of 15 to 25 dBmV Too high level may damage laser Optical Signal Output Optical signal output port SC APC or optional FC APC connector There are invisible laser emissions from Fiber output when laser is active Reserved RS 232 standard network management po
10. nce DFB laser with narrow spectrum and good linearity e Excellent pre distortion technology leading to improved CSO and C N RF gain manual control e GaAs Technology Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 3 1 CHAPTER 3 FEATURES Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual CHAPTER 4 FUNCTIONAL DIAGRAM FUNCTIONAL DIAGRAM 4 Functional Diagram PRE AMPLIFIER DIGITAL ATTENUATOR POWER AMPLIFIER PRE DISTORTION OPTICAL COOLED ARS DFB LASER OUTPUT AUTO TEMP CONTROL AUTO POWER CONTROL 20 dB TEST ATC AUTOMATIC APC AUTOMATIC CONTROL CIRCUIT CONTROL CIRCUIT RF TEST POINT OPTICAL POWER TEST POINT 5 DIGIT DIP SWITCH Q FRONT PANEL Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 4 1 4 FUNCTIONAL DIAGRAM Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 5 SPECIFICATIONS SPECIFICATIONS 5 Specifications 5 1 Link Test Condition Test Condition Specifications Table SPECIFICATIONS OPTICAL POWER OPTICAL LINK PATH LOSS OPTICAL WAVELENGTH TYPE OF LASER OPTICAL MODULATION MODE OPTICAL CONNECTOR TYPE FREQUENCY RANGE RF INPUT LEVEL FLATNESS IN BAND RF INPUT IMPEDANCE INPUT REFLECTION LOSS C COMP TR BT C COMP 2nd ORD
11. rt not used in this version Reserved RS 485 and LAN standard network management port not used in this version would be dangerous to point this port toward the human body especially eyes when equipment is energized AC Power with Fuse AC power connection AC Power Switch Turn ON or turn OFF the AC power Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 6 1 6 FUNCTION GUIDE Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 7 INSTALLATION amp ADJUSTMENT INSTALLATION amp ADJUSTMENT 7 Installation amp Adjustment 7 1 Openingthe Cover 7 1 1 Inspect the package If the packaging has been damaged or shows signs of water damage please contact the freight company or contact ATX 7 1 2 After unpacking check the equipment and accessories according to packing list If there is any question please contact ATX 7 1 3 If you think equipment has been damaged please don t turn on the power and avoid worse damage Please contact ATX 7 2 Supplies amp Tools An optical power meter A digital multimeter A Cable TV RF meter or spectrum analyzer A standard fiber test jumper FC APC or SC APC Denatured or 99 pure isopropyl alcohol and lint free fiber optic cleaning wipes 7 3 Installation a Mountthe transmitter in the rack and ground the case b Checkinput voltage using a dig
12. to receiver too high RF modulation too high RF input drive to transmitter too high Check the power socket fuse and input AC voltage to the power supply AC90V 250V If they are normal the switching power supply might be in problem contact ATX Swap to a good test jumper Clean contaminated fiber active connector or adapter Swap the damaged adapter Clean fiber active connector or adapter Chapter 8 Cleaning amp Maintenance Check RF input levels to transmitter 15 25 Check link loss Use only angled SC APC optical connectors or fusion splice where necessary Check the individual channel signal C N or SNR Check the flatness of the RF input signal Check input power at optical receiver and pad if necessary Check optical transmitter modulation level parameter and readjust if too high Make sure the RF input level is within the range 15 25dBmV Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 10 1 CHAPTER 10 TROUBLESHOOTING 10 2 Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 11 SERVICE amp SUPPORT SERVICE amp SUPPORT 11 11 1 11 2 Service amp Support Contact ATX Networks Please contact ATX Technical Support for assistance with any ATX products Please contact ATX Customer Service to obtain a valid RMA number for any ATX products that require ser
13. vice and are in or out of warranty before returning a failed module to the factory TECHNICAL SUPPORT Tel 905 428 6068 Toll Free 800 565 7488 USA amp Canada only gt Press 3 for Technical Support gt Then press 1 for Digital Video Products DVIS DigiVu UCrypt etc gt OR press 2 for All Other Products Email digitalvideosupport atxnetworks com for Digital Video Products Email jleskovar atxnetworks com for Other Products CUSTOMER SERVICE ATX Networks 1 501 Clements Road West Ajax ON L1S 7H4 Canada Tel 905 428 6068 Toll Free 800 565 7488 USA amp Canada only gt Press 1 for Customer Service Fax 905 427 1964 Toll Free Fax 866 427 1964 USA amp Canada only Web www atxnetworks com Email support atxnetworks com Warranty Information of ATX Networks products have a 1 year warranty that covers manufacturer s defects or failures Q Series Optical QFOT1L Series Optical Transmitter Installation amp Operation Manual 11 1 1 501 Clements Road West Ajax 118 7H4 Canada ATX Tel 1 905 428 6068 Toll Free 1 800 565 7488 Fax 1 905 427 1964 Toll Free Fax 1 866 427 1964 www atxnetworks com support atxnetworks com Rev 04 15 ANW0944 Printed in Canada
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