Model 2805
Contents
1. The LED is on when the unit is receiving AC power and off when there is no power to the unit RF Input Level LED Tri colored Green Yellow Red LED This LED indicates the RF signal input level into the transmitter The RF input indicator is green when the RF signal input is within 1 5 dB of the optimum input level When the signal input falls below the optimum 3 dB range the LED becomes yellow When the signal input rises above the optimum range the LED turns red DO NOT EXCEED THE RECOMMENDED RF INPUT LEVEL EXCESSIVE LEVELS OF RF INPUT WILL DESTROY THE TRANSMITTER gt w IN m See the warning label on top of the unit Figure 1 7 page 6 for instructions on acheiving the recommended RF input level Cooler Status LED Bi colored Green Red LED When green this LED indicates that the laser cooler TEC is functioning normally and the laser temperature is stable Normally this LED will be red or change from red to green in the first ten seconds after power has been applied to the transmitter If the LED turns red at any time other than in the first ten seconds of operation the unit should be turned off IMMEDIATELY to avoid laser damage 7 Front Panel Physical Description Model 2805 CATVLinx PNS Transmitter d G Laser Status LED Bi colored Green Red LED When green this LED indicates that the laser is initialized and operating normally Lights red to indicate operation above normal opera2. The optical input power at the receiver may be too low In this case the opti cal status LED will be yellow See Figure 1 3 for the expected CNR versus the channel loading and received optical power Revision 1 1 Model 2805 CATVLinx PNS Transmitter Operating Instructions 3 3 3 4 3 5 39 1 3 5 2 User Maintenance No user maintenance is required The Model 2805 CATVLinx 110 Channel Private Network Solution Transmitter contains no user serviceable parts and requires no routine service Contact the factory if the unit requires warranty repair work See Section 3 6 page 18 for troubleshooting Repair Service For equipment repair or technical assistance contact Customer Service 800 732 5252 USA or 540 382 0462 A Returned Material Authorization RMA number must be issued by Customer Service before the return of a failed unit Units should be returned in their original shipping carton if available Always include a com plete description of the failure or observed anomalies All units are marked with model number and serial number This identification sticker is placed on the rear panel transmitter or on the product label receiver The serial number is a date code used as a reference for warranty service Cleaning If the units need to be cleaned avoid the use of all solvents and use low pressure clean air to remove loose dirt Use low pressure clean air to clear the connectors of any debris Dirty or scratch
3. The units are in general very rugged and can withstand the stresses of most ship ping and handling circumstances However the following precautions should be taken 1 When the units are shipped they should be wrapped in a protective material such as bubble wrap to protect against excessive jarring and to prevent dam age to the external finish of the units Always use packing material to separate multiple units that are packaged together 2 Care should be taken not to drop or strike the units in any way especially around the optical connectors 3 The units should never be submersed in any liquid SEVERE SHOCK HAZ ARD Storing the Unit If a unit is to be out of use for an extended period of time the following steps should be taken to ensure the preservation of the unit 1 The storage temperature range is 20 C to 70 C 2 Alow humidity environment is preferable for long term storage 3 All connectors should be covered with active device receptacle caps Revision 1 1 Model 2805 CATVLinx PNS Transmitter Section 3 Operating Instructions 3 1 Connections and Power up 1 Install the links as described in Section 2 page 9 of this document 2 Measure the RF level BEFORE making any connections to the transmitter This measurement is described in Section 2 6 page 10 3 Clean the optical connectors See Section 3 5 page 17 for cleaning instruc tions Be sure all optical connectors are APC type 4 Connect the op
4. 1 1 5 Product Technical Bulletin Model 2805 CATVLinx PNS Transmitter Total Number of Input Channels WARNING EXCESSIVE RF INPUT WILL DESTROY THE LASER Even if the O o a OE Os Oo O Or ve P Dl oag g5 Z 3 2 23 os Q HO AWgp Jade api Jed 9497 Sia the Drive Level per Video Carrier chart above for details Transmitter is not Powered See the product IOM AN128 and e Properly determine that the unit RF level input is within safety bounds level is too high Disconnect the RF input immediately Decrease RF levels by 6 dB steps and reconnect the RF input until the LED turns yellow or green If it turns yellow increase RF levels by 2 dB steps until the LED turns green levels are nominal e The chart above gives the nominal RF input level for channel loading The unit ships with a 20 dB attenuator on the input to protect against accidental overload on initial hookup Remove this attenuator once RF from 1 to 110 channels Note that the chart is in dBmV units per channel not dBm DO NOT exceed the values shown on the chart e The RF INPUT LEVELLED on the front panel gives a positive indication of the RF level Ifthe LED is yellow the RF level is too low Increase in 2 dB steps until the LED turns green If the LED is red the RF input Figure 1 7 Top Label Used to Determine RF Input for Transmitter 8 The Tx rear panel power module can accept voltage levels from 120 to 240 VA
5. Inc for additional instructions immediately If there is power at the Tx ver ify proper fiber is connected to the Rx and ensure the integ rity of the fiber Revision 1 1 Model 2805 CATVLinx PNS Transmitter Operating Instructions Check optical output power at This product requires all APC the Tx optical connectors Low optical power at the Rx Check optical connector type Verity that the Tx power is on APC Contact the factory for addi Check fiber integrity tional instructions The Tx RF Input Level LED should be green If the LED is either red or yellow the signal input has fallen outside of the 1 5 dB range If the Tx RF No signal out of Rx Optical Level indicator LED is either ves iig input sigad giing Tx yellow red or unlit Input Level LED is green the receiver may be in need of repairs Contact the factory for additional instructions A larger signal will cause dis tortion and may destroy the transmitter If the RF level is too high the LED will be red Adjust the input level until the LED turns green Verify fiber size Use single mode fiber only Verify input signal at Tx The Tx RF Input Level LED should Signal out of Rx is distorted green Revision 1 1 19 Operating Instructions Model 2805 CATVLinx PNS Transmitter Notes 20 Revision 1 1 Model 2805 CATVLinx PNS Transmitter Index technical specifications 2 6 A appl
6. cscseeeeeeeeeeeeeeeeeeeeeneeeeeeeeeseseeeeeeeeeeeees 1 1 1 Product Oy CIO access eemesntictiecrscaeiaeceneia deaione intel nesd EEEE NOE EER EE AEREE REEN 1 TPCC NOI Eo a a T A eee A 1 1 3 Optical Video Electrical Characteristics ccccccccccccceeseeeeeeeseeeeeeesuaeeeeeeaeeeeeeaneees 2 1 4 Environmental and Physical Characteristics ccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeees 2 eS CCIM GC ATOM INO LOS apressa cansccncideselaaseusbocce cause ce iavia ctalaaieu neceetentomacadeeanas 2 Figure 1 1 In Band Frequency Response c ccccceeceeeeeeeeeeeeeeeeeeeeneeeeeneeeeeeees 2 Figure 1 2 Expanded Frequency Response cccccceeeseeeeeeeeeeeeeeeeeeseaeeeeeeees 3 Figure 1 3 CNR vs Rx Optical Input and Channel Loading ccee 4 Figure 1 4 Transmitter Level per Channel vs Number of Channels 4 Figure 1 5 Transmitter Level per Channel vs LOg40 cccceeeeeeeeeeeeeeeeeeeeeeeeeaeaes 5 Figure 1 6 Response of Model 2805 RF Power Meter cccceeeeeeeeeeeeeeeeeees 5 Figure 1 7 Top Label Used to Determine RF Input for Transmitter 6 gE com 29 a2 0 9 eee EA E E een eee ene eee eee 6 Figure 1 8 Point to Multipoint Private Network Solution c ceeeeteees 6 ga PENON cc eee ns ee ee ee ee ee ee 7 Section 2 Installation IMStructiOnS 2 2 20c0ceseeeeeeeeeeeeneeeeeeeeeseeeeeeeeeeseeeeeeeeenseeeeeeees 9 2 1 General Installation
7. numbers in Section 1 7 page 7 for available optical power options Be sure to compute your fiber bandwidth end to end as well as attenuation The Model 2805 incorporates an optical isolator in the laser package that reduces the effect of optical backreflections on the laser performance How ever all analog lasers are affected by optical backreflections The 2805 can only achieve published performance levels if the fiber between the transmitter and receiver has a maximum optical backreflection of 50 dB Optical backreflection levels above 50 dB will increase the noise floor of the laser i e decrease the carrier to noise ratio worsen both CSO and CTB performance increase passband ripple and dramatically increase cross mod ulation The result will be a noisy grainy picture with diagonal bars Force Inc recommends that all fiber connections be SC APC type FC APC type or fusion spliced There is some folklore which suggests that the only critical backreflection is the one closest to the transmitter Our experi ence does not support that view We find that all backreflections matter regardless of their distance from the transmitter Figure 1 3 presents a tremendous amount of performance data for the 2805 link The horizontal axis is the amount of optical light that reaches the receiver It is not the loss between the transmitter and receiver The vertical axis shows the carrier to noise ratio at a given optical input level Prod
8. you encounter any kind of problem after reading this manual contact your local distributor or a Force Inc Applications Engineer To reach technical support On the Web http www forceinc com By Phone Monday through Friday 8 00 am USA 800 732 5252 to 5200 pm EST TEL 540 382 0462 By Fax 540 381 0392 By Email sales forceinc com Warranty Force Incorporated standard products are warranted to be free from defects in materials and workmanship meeting or exceeding factory specified performance standards for a period of three 3 years from date of purchase Force Obligations Force will at its discretion and expense repair any defect in materials or work manship or replace the product with a new product Force will upon receipt of the return evaluate the product and communicate to the customer the nature of the problem and determine if the claim falls under warranty coverage If during the warranty period Force is unable to repair the product to the original warranted state within a reasonable time or if subcomponents of the unit have been obsoleted or discontinued then Force has the option to provide an equiva lent unit Revision 1 1 iii Preface Model 2805 CATVLinx PNS Transmitter Exclusions This warranty does not extend to any product that has been damaged due to acts of God accident misuse abuse neglect improper system design or application improper installation improper operation or maintenance o
9. 2805 units and their companion receiver s While this guide provides basic information on how to configure and install the units it assumes that you as the user are familiar with e the installation and manipulation of electronic and fiber optic equipment e the installation and manipulation of CATV video audio equipment This manual is divided into the following sections e Section 1 page 1 Describes the Private Network Solution PNS transmitter lists technical specifications performance graphs system applications and ordering information e Section 2 page 9 Describes the installation of the PNS transmitter and its com panion receiver s e Section 3 page 15 Describes the operation of the PNS CATV link troubleshoot ing and user maintenance A quick reference index completes the user manual Revision 1 1 ii Model 2805 CATVLinx PNS Transmitter Preface Related Documentation e OM2807 User manual for Model 2807 Mini node Receiver e IOM2808 User manual for Model 2808 PDS PNS CATV Receiver e AN123 North American Television Frequencies e ANI128 Care and Feeding of Analog CATV Fiber Optic Links e AN141 System Solutions for CATV HFC Networks e Fiber Optic Reference Guide 3rd Edition by David R Goff Focal Press 2002 General theory and operation of fiber optic units e Web Site Our web site http Awww forceinc com may be used to download the latest versions of this manual Technical Support If
10. C at 50 to 60 Hz 9 Fuse Rating is 1 25 A Slow Blow Risk of fire Only use fuses with same type and rating as marked 10 Most parameters are relatively unaffected by varying temperature A moving air environment is recommended at ambient temperatures above 35 C 11 Humidity is RH non condensing 12 Dimensions include L brackets for mounting the chassis to an EIA 19 equip ment rack 13 The CATWLinx Model 2805 is optimized for single mode operation only Use on multimode fiber is not recommended even for short distances because of the large amount of modal noise that could result 1 6 Applications Figure 1 8 illustrates a point to multipoint CATV network The Force Inc Model 1188 Optical Splitter Coupler splits the output from Model 2805 transmitter allow ing a single transmitter to drive multiple Model 2808 receivers Model 2808 RF lt lt lt SSS SSeS eee eeS CATVLinx Rx Amplifier Cable Provider RF Model 2805 Combiner CATVLinx Tx Model 2808 RF CATVLinx Rx Amplifier Model 2808 RF pa 0884 L Spo CATVLinx Rx Amplifier Jayds yeondo Head End Model 2808 RF CATVLinx Rx Amplifier Figure 1 8 Point to Multipoint Private Network Solution 6 Revision 1 1 Model 2805 CATVLinx PNS Transmitter Product Technical Bulletin 1 7 Part Numbers Part Number Optical Connector Type Note The FC APC interface uses the wide key standard This means that the units are o
11. Model 2805 Private Network Solution PNS 110 Channel Transmitter IOM2805 Revision 1 1 December 2003 maaa ATV Linx A Instructions for Installation and Use Read this manual before installing or using this product Observe all safety warnings and cautions CATV Linx A E i TET IAE gM ATT Il Copyright 2003 by Force Incorporated All rights reserved Force Incorporated reserves the right to make changes to the product described in this document in the interest of document improvement Eg Force Incorporated Innovators of Multimedia Fiber Communications 825 Park Street Christiansburg VA 24073 TEL 540 382 0462 FAX 540 381 0392 USA 800 732 5252 sales forceinc com www forceinc com Model 2805 CATVLinx PNS Transmitter Preface WARNING The optical emissions from the chassis and connected optical fiber are laser based and may present eye hazards Follow all safety precautions _ Invisible laser radiation INVISIBLE LASER RADIATION emitted from this connector AVOID DIRECT EXPOSURE TO BEAM Indium Gallium Arsenide Phosphide 20 mW maximum power output Class lllb Laser Product This product complies with applicable BRH standards under the Radiation Control for Health and Safety Act of 1968 About this Manual This manual explains how to configure and install the Model 2805 Private Network Solution PNS transmitter It is intended for engineers and technicians who will install the
12. Requirements ccccccceceeeeeeceeeeeeeeeeeeeeeeaeeeeeeeeesaeeeeeeeeasaenees 9 22 tems Provide Ce sn se sence aranenseepates n EE e A EER 9 DD keme REGUE siesena sweat dense E E E E E E E 9 2 A PE ee E E 10 2 5 Equipment Rack Configuration cccccccccsesseeeeeeeeeeeeeeeseaeeeeeeeeeeeessaeeeeseeeeeeeeeas 10 2 6 Measuring RF Input Levels at the Transmitter cc cecceeeeeeeeeeeeeeeeeeeeeeeeeeeeees 10 2A COIN COINS ee E A E eeeee 11 Revision 1 1 v Contents Model 2805 CATVLinx PNS Transmitter 2 8 Front Panel Physical Description x sisssrisausvocineras reaticunnuesctenenmatis pute thateieawumoncmenmeen 12 Figure 2 1 Transmitter Front Panel ccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaaees 12 2 9 Rear Panel Physical Description wdiveiuiacsiachac een anie EAN i a 13 Figure 2 2 Transmitter Rear Panel a xisieucctcpeseiavitanicebcrnunsaannmeaetnenelaan ei saute 13 2 10 Safety PrecaUtiONS eee teare E E eee ne 13 2 10 1 Laser Safety Procedures vsiccacisnacasveaguysscdesoiateessdnepeaasabaonievedeaatsaaidanedaets 13 2 11 Shipping and Handling Precautions cccccceeeeceeeeeeeeeeeeeeeeeeeeeseeneeeeeeeeeeeees 14 2TA Snn E III sorts ean preteen eon E E 14 Section 3 Operating INStructiOns wcscsicicicicisisicreeceewstennceeiewsereruneweeneeineeenceenen 15 3 1 COMMECTIONS and PowerUP 6s cccdsrcneatecitemarnecaioceasteasttiaassechusitarsendteneaeteeunasheitets 15 3 2 Performance VClM CAL OM is
13. as broadband LANs distance learning and multiple data services FCC Notice The Model 2805 has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions in this manual may cause harmful interference to radio com munications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user must correct the interference at the user s Own expense Compliance with applicable regulations depends on the use of shielded I O cables The user is responsible for procuring the appropriate cables Revision 1 1 1 Product Technical Bulletin Model 2805 CATVLinx PNS Transmitter 1 3 Optical Video Electrical Characteristics 25 C SM Fiber Note 13 Notes See Section 1 5 Min Typ Max Units Channel Loading 110 Ch Bandwidth 40 870 MHz 1 Operating Wavelength 1290 1310 1330 nm Optical Output Power See Section 1 7 2 Required Fiber Bandwidth 2 000 MHz 3 Input Output Impedance Ohms Side Mode Suppression Ratio SMSR dB Backreflection Tolerance dB 4 Carrier to Noise Ratio CNR See Figure 1 3 5 Composite Second Order CSO pi dB Composite Tri
14. e chassis and install it in your earth grounded equipment rack Make sure to load the heaviest equipment near the bottom of the rack and the lightest equipment at the top of the rack The surface of the equipment rack that mates to the chassis mounting ears should be conductive The unit should be located in an area that provides adequate lighting and is relatively free from dust The units are each housed in a single EIA standard 1RU 1 75 inch rack mount chassis To ensure the unit does not overheat leave IRU of space above and below each installed chassis When connecting power to the chassis take care as to not overload the branch circuit supplying power to whatever is already con nected Also make sure there are no obstructions in the natural convection air exhaust or inlet paths Measuring RF Input Levels at the Transmitter Excessive RF input to a fiber optic CATV transmitter WILL kill the laser even if the unit is not powered Lasers can be destroyed by being overdriven for as little as one nanosecond 10 seconds Because they can be destroyed so quickly it is essentially impossible to design a circuit or fuse that will blow before the laser is destroyed Therefore it is imperative that the RF level be within acceptable limits BEFORE the cable is attached to the transmitter See the Drive Level per Video Carrier top label see Figure 1 7 on the transmitter for the optimum drive levels and follow the steps below 1 Usin
15. ed connector end faces will greatly reduce the unit s performance Foam tipped swabs such as the 2 5mm Mini Foam Swab offered by Fiber Instrument Sales P N F1 0005 may be saturated with denatured alcohol see note below and inserted into the optical port for cleaning DO NOT INSERT A DRY SWAB INTO THE OPTICAL PORT AS THIS MAY DAMAGE THE FIBER END FACE Many fiber optic installations experience degraded performance due to dirty optical connector end faces The following procedure should be used to properly clean the optical connector end faces Optical Connector Cleaning Equipment e Kimwipes or any lens grade lint free tissue The type sold for eyeglasses work quite well e Denatured Alcohol Use only industrial grade 99 pure isopropyl alcohol Commercially available isopropyl alcohol is for medicinal use and is diluted with water and a light mineral oil Industrial grade isopropyl alcohol should be used exclusively e 30X Microscope e Canned Dry Air Directions for Optical Connector Cleaning 1 Fold the tissue twice so it is four layers thick 2 Saturate the tissue with alcohol 3 First clean the sides of the connector ferrule Place the connector ferrule in the tissue and apply pressure to the sides of the ferrule Rotate the ferrule sev eral times to remove all contamination from the ferrule sides 4 Now move to a clean part of the tissue Be sure it is still saturated with alcohol and it is still four layers thick P
16. em A number of indicator LEDs may assist in troubleshooting These allow the user to quickly assess the nature of any major unit malfunctions If prob lems persist consult the Force Inc reference materials listed below or contact the factory Problems and Comments OO m O e No optical power out of Tx No optical power at the Rx Check power at the Tx Verity that the AC power cord is firmly attached to the back of the transmitter and verity the integrity of the power cord Be sure that the primary power source has not been inadvertently turned off and that no fuses have blown in the unit or at the power source Plug in the power cord If no AC power is reaching the unit the Power LED on the transmitter will be off Check Tx power connection If the unit is receiving AC power Power LED is green If the Tx Laser LED is red but check the Laser LED If this the Cooler Status LED is is red check the Cooler Sta green try turning the trans tus LED If the Cooler Sta mitter off and back on The tus LED is green the problem Laser and Cooler Status may be in the laser If the LEDs should light red within Cooler Status LED has also the first ten seconds of unit turned red the TEC cooler initialization and then turn has tailed and the laser is in green If either of these LEDs danger of overheating remains red contact Force Remove power from the unit
17. g a spectrum analyzer determine that the RF level input to the transmitter is within safety bounds The unit is shipped with a 20 dB attenuator on the input to protect against accidental overload on initial hookup An additional 20 dB attenuator may be added for absolute security This attenuator should be removed once RF levels are verified to be nominal 2 The Drive Level per Video Carrier chart on top of the transmitter gives the nominal RF input level for channel loading from 1 to 110 channels Note that the chart is in dBmV units per channel not dBm DO NOT exceed the values shown on the chart 3 The RF Input Level LED on the front panel gives a positive indication of the RF level If the LED is yellow the RF level is too low Increase in 2 dB steps until the LED turns green If the LED is red the RF input level is too high Dis connect the RF input immediately Decrease RF levels by 6 dB steps and Revision 1 1 Model 2805 CATVLinx PNS Transmitter Installation Instructions reconnect the RF input until the LED turns yellow or green If it turns yellow increase RF levels by 2 dB steps until the LED turns green Ideally the RF level should be checked with an instrument such as a spectrum analyzer to verify that the levels are appropriate If instrumentation is not available to actually measure the RF levels Force recommends adding 40 dB of attenuation at the transmitter input 40 dB of attenuation will adequately protec
18. he RF input is too high Note 2 At any time if the laser temperature is too high the COOLER STATUS LED will change from green to red This will cause the LASER LED to go red as well Revision 1 1 15 Operating Instructions Model 2805 CATWLinx PNS Transmitter 3 2 16 7 8 When power is first applied the POWER and RF INPUT LEVEL LEDs should be green The COOLER STATUS and LASER LED will light red or change from red to green to indicate normal operation If the RF Input Level LED is red this means the RF level is too high DIS CONNECT THE RF INPUT IMMEDIATELY Add the attenuator then recon nect the RF input and observe the LED color Repeat as necessary until the LED is green If the RF Input Level LED is yellow this means the RF level is too low Increase the input level until the LED is green OPTICAL LASER RADIATION IS PRESENT AT THE OPTICAL CONNECTOR WHEN THE UNIT IS ACTIVATED AVOID DIRECT EYE EXPOSURE TO THE BEAM Connect power supply to the receiver For Model 2807 The power supply must be from 12 to 16 Volts DC It is critical that the supply voltage never drops below 12 Volts If the voltage drops below 12 Volts the link may not operate Force Inc recommends the Model PS200 wall mount power supply for use with the Model 2807 receiver For Model 2808 The Model 2808 receiver uses an integral AC power supply which uses a standard 3 wire ground AC power cord For all receivers When powe
19. ication 16 power up 15 power up sequence 15 product overview 1 product TB 1 7 22 Model 2805 CATVLinx PNS Transmitter R rear panel description 13 receiver part numbers 9 repair service 17 RF input levels measurement 10 S safety precautions 4 6 9 12 13 laser safety ii 13 shipping precautions 14 storage precautions 14 T technical specifications electrical 2 optical 2 performance graphs expanded frequency response 3 physical 2 video 2 technical support See troubleshooting transmitter part numbers 7 9 troubleshooting 18 20 repair services 17 technical support iii tx level per ch vs of ch diagram 4 tx level per ch vs log10 of ch diagram 5 W warranty iii Revision 1 1
20. ications 6 C cleaning the optical connector 17 cleaning the unit 17 cnr vs rx optical input and channel loading diagram 4 connection optical 13 connections 15 optical 11 power 11 13 RF 11 13 status 11 13 connections See installation D diagrams performance cnr vs rx optical input and channel loading 4 drive level per video carrier 6 expanded frequency response 3 in band frequency response 2 Revision 1 1 RF power meter response 5 tx level per ch vs of ch 4 tx level per ch vs log10 of ch 5 E expanded frequency response diagram 3 F FCC notice 1 front panel physical description 12 H handling precautions 14 handling the optical connector 18 in band frequency response diagram 2 inspection 10 installation 9 14 connection RF 13 connections 11 15 alarm 11 optical 11 13 21 Index optical interface 3 power 11 13 RF 11 status 11 13 general requirements 9 inspection 10 items provided 9 items required 9 maintenance 17 performance verification 16 power up 15 rack configuration 10 rear panel description 13 RF input levels into the transmitter 6 10 11 L laser safety precautions ii 13 M maintenance 17 measuring RF input levels at the transmitter 10 O operating instructions 15 20 optical interface See installation connections ordering information 7 P part numbers receiver 9 transmitter 7 9 performance performance verif
21. lying relationship is linear if plotted against the logarithm of the number of channels Drive Level per Video Carrier dBmV 0 10 20 30 40 50 60 70 80 90 100 110 Number of Channels Figure 1 4 Transmitter Level per Channel vs Number of Channels Revision 1 1 Model 2805 CATVLinx PNS Transmitter Product Technical Bulletin Drive Level per Video Carrier dBmV 0 0 0 02 04 06 08 10 12 14 16 18 20 22 LOG Number of Channels Figure 1 5 Transmitter Level per Channel vs Log g Number of Channels Figure 1 6 shows the response of the Model 2805 transmitter s integral RF power meter This meter is accessed via pin J4 5 of the 9 pin D sub connector on the rear of the transmitter Output Voltage mV Total RF Input Power dBm Figure 1 6 Response of Model 2805 RF Power Meter 7 Each transmitter has a label such as the one shown in Figure 1 7 that gives the RF input levels for the transmitter The individual carrier levels should closely match each other to ensure consistent performance on all channels In all cases set the composite RF input level so that the RF INPUT LEVEL LED is green The RF indicator LED only operates properly for rated channel loading and a flat input spectrum To use the chart look up the channel loading you will be presenting to the transmitter input and read off the drive level per video carrier For instance with 40 channel loading each video carrier should be about 25 0 dBmV Revision
22. nc 2805TX SCXX XX CATVLinxe 110 Ch PNS Transmitter Active Device Receptacle Cap for optical and RF connectors 1 per connector Any my L Bracket Mounting Ears Allows the Tx chassis A PEPUN ea ee to be installed in a 19 wide rack 1 per unit Any Any Three wire ground AC power cable Items Required Qty Mfr P N Description AR Force Inc 2807RX SFXX CATVLinx Mini node CATV Receiver AR Force Inc 2808RX SFXX CATVLinx PDS PNS CATV Receiver 6 32 Panhead Mounting Screws with Lock A per unit Any Any Washers and Nuts used to mount the receivers 1 Any Any Straight Screwdriver Revision 1 1 9 Installation Instructions Model 2805 CATVLinx PNS Transmitter 2 4 2 5 2 6 10 Qty Mfr P N Description EIA Standard 19 Grounded Equipment Rack AR Any Any with Hardware to Install the Transmiter into the Rack AR Any Any 9 125 um Single mode Fiber We Force Inc PS200 Wall mount Power Supply Model 2807R only T Any Any Three wire ground AC power cable 2808 Inspection Remove the unit from its shipping container Any in shipment damage that may have occurred should be visually apparent Look for bent or damaged connectors or mounting brackets Claims for damage incurred in shipment should be made directly to the transportation company in accordance with their instructions Save the shipping cartons until installation and performance verification are completed Equipment Rack Configuration Carefully unpack th
23. ple Beat CTB dB Input Signal Range per ch See 1 7 and 1 5 6 7 Power Supply Voltage 120 VAC 8 Power Supply Frequency 50 60 Hz 8 Power Dissipation 20 Watts Fuse Slow Blow 1 25 A 9 1 4 Environmental and Physical Characteristics Min Typ Max Units Notes See Section 1 5 Operating Temperature Range O 45 C 10 Storage Temperature Range 20 70 gS Humidity O 90 11 Weight 5 5 lbs 2 5 kg Physical Dimensions 19 Wx 1 72 Hx 14 1 D in 12 483 x 43 7 x 358 mm 12 1 5 Specification Notes 1 Figure 1 1 shows the typical frequency response of a 2805 link over the speci fied frequency range The gain flatness is typically 1 0 dB over this range The flatness is typically less than 0 1 dB over a standard 6 MHz channel bandwidth See Application Note AN123 for additional information on North American Television Frequencies Response dB Frequency Hundreds MHz 2805T 2805T with with 2807R 2808R Figure 1 1 In Band Frequency Response 2 Revision 1 1 Model 2805 CATVLinx PNS Transmitter Product Technical Bulletin 2 3 A 5 Revision 1 1 Figure 1 2 shows an expanded view of the frequency response of a typical 2805T 2808R link Response dB 10 40 91 142 193 244 295 346 397 448 499 550 Frequency MHz 9805T 2805T with with 2807R 2808R or 2809R Figure 1 2 Expanded Frequency Response All optical power levels are average values Output is Class IIIb laser See part
24. ptimized for use with FC APC connectors that have a 2 14 mm wide alignment key Nar row key FC APC connectors 2 02 mm may be used but will produce inferior results Stan dard FC PC connectors have a 2 36 mm wide key and cannot be plugged into either unit Revision 1 1 7 Product Technical Bulletin Model 2805 CATVLinx PNS Transmitter Notes 8 Revision 1 1 Model 2805 CATVLinx PNS Transmitter Section 2 Installation Instructions 2 1 2 2 2 3 General Installation Requirements The installation of these units is very simple There are no special unpacking instructions except that care should be taken to handle units gently Fiber optic links are sensitive electronics devices that should be handled with care Like most electronics they are susceptible to ESD Proper ESD techniques such as wearing a wrist grounding strap should be observed at all times when handling a unit The units should not be dropped No assembly is required Do not install the equipment near sources of excessive heat such as furnace out lets or above heat producing units such as large power supplies and tube type equipment Observe temperature and relative humidity requirements specified in Section 1 4 page 2 Potentially hazardous uninsulated voltages exist beneath the top panel Items Provided The following is a list of items provided with each Model 2805 PNS Fiber Optic Video Transmitter Qty Mfr P N Description AR Force I
25. r connection to an improper voltage supply The Force warranty does not cover fuses batteries and lamps Modifications or alterations of Force products including but not limited to installation of non Force equipment or computer programs except as authorized by Force will void this warranty Removal or breaking of the seals on the product will also void the war ranty In addition cost of repair by unauthorized persons within the warranty period of the product will not be covered by Force Incorporated Such repairs will void the warranty Force Incorporated makes no other representation or warranty of any other kind express or implied with respect to the goods whether as to merchantability fit ness for a particular purpose or any other matter Force Incorporated s liability shall not include liability for any special indirect or consequential damages or for any damages arising from or attributable to loss of use loss of data loss of good will or loss of anticipated or actual revenue or profit or failure to realize expected savings even if Force Incorporated has been advised of the possibility of such damages This warranty constitutes Force Incorporated s entire liability and the customer s sole remedy for defects in material and workmanship IV Revision 1 1 Model 2805 CATVLinx PNS Transmitter Contents PRCT ACC ys cteaninactanderecsicen i aaa i Ea ii Section 1 Product Technical Bulletin 2 2 2
26. r is applied and the link is operational the Optical Level LED should light green to indicate the optimum optical input level If the optical input level is too low the LED will be yellow The LED also doubles as a power indicator OPTICAL LASER RADIATION IS PRESENT AT THE OPTICAL FIBER THAT ATTACHES TO THE RECEIVER S OPTICAL CONNECTOR WHEN THE UNITS ARE ACTIVATED AVOID DIRECT EYE EXPOSURE TO THE BEAM The units are now fully operational Verify the proper operation of the link by following the steps in Section 3 2 page 16 No other user adjustment or atten tion is required See Section 3 3 page 17 for instructions on maintaining and cleaning the link See Section 3 6 page 18 for information on troubleshooting Performance Verification Once the units have been installed verify that the picture quality is good If the picture quality is not good there are several likely causes 1 2 3 A 5 The optical fiber may have large backreflections Use an OTDR to examine the fiber run There may be non APC optical connectors somewhere in the system These cause unacceptable levels of backreflection The RF input spectrum may not be flat It is possible to have a green RF Level LED even if the input spectrum has a large amount of tilt All Force CATV products are designed to operate with a flat input spectrum There may extraneous i e non video signals in the input RF Be sure to filter out all non desirable signals
27. s ssp cw szes ctazsaasegaseteaso e a iisa 16 33 User AAFC ELA Coa bc 6 coer eee eer rer ee ee 17 ARED Gio ot Cl lt a ee ae ree ee ree ee ee eee eer ee ere ee err 17 BD CIS AIMS caseeeseecamsecentaca E E T T 17 3 5 1 Optical Connector Cleaning Equipment cccccecceeeeeeeeeeceeceeeeneees 17 3 5 2 Directions for Optical Connector Cleaning ccccccecceeceeeceeeeeeeeeeeeeees 17 35 3 CONMEGION Handling 5 ccc canteen E E E A E A 18 36O VOUS SOON sesser nenn n aE e a ea 18 37 Probie ms ana Commens sarraa A cieieepnceeaere 18 DING E E A EA A E S E A E 21 vi Revision 1 1 Model 2805 CATVLinx PNS Transmitter Section 1 Product Technical Bulletin 1 1 1 2 Product Overview The Force Incorporated CATVLinx Model 2805 110 Channel CATV Private Network Solution PNS Transmitter is part of a robust system for transfer ring up to 110 channels of VSB AM modulated signals over a single mode optical fiber The Model 2805 provides 40 870 MHz of usable bandwidth for video signals stacked at 6 MHz intervals A low loss single mode fiber allows full channel loading to beyond 20 km while maintaining a good carrier to noise ratio The Model 2805 may be used with the Model 2807 Mini node receiver for use in return path and multiple splitter applications or with the Model 2808 PDS PNS receiver for basic 110 channel CATV transmission In all cases the link provides excellent perfor mance for many demanding applications such
28. t DB9 Connector Transmitter remote status monitoring connection See Section Section 2 7 page 11 for pin connections AC Power Input and Fuse Holder Connects to primary AC power via a detachable three wire grounded power cord Connect only to a three wire grounded outlet Do not defeat the purpose of this ground The fuse type is 1 5A Slow Blow F Unit Serial Number The unit serial number is a date code that identifies the start date of the product warranty See page iii for Force s Standard Warranty Figure 2 2 Transmitter Rear Panel 2 10 Safety Precautions The optical emission from the units are laser based Class IIIb and may present eye hazards if improperly used NEVER USE ANY KIND OF OPTICAL INSTRU MENT TO VIEW THE OPTICAL OUTPUT OF THE UNIT As always be care ful when working with optical fibers Fibers can cause painful injury if they penetrate the skin 2 10 1 Laser Safety Procedures 1 ALWAYS read the product data sheet and the laser safety label before power ing the product Note the operating wavelength optical output power and safety classification 2 Ifsafety goggles or other eye protection are used be certain that the protec tion is effective at the wavelength s emitted by the device under test BEFORE applying power 3 ALWAYS connect a fiber to the output of the device BEFORE power is applied Power should never be applied without an attached fiber output If the device has a connector o
29. t the unit from the highest RF levels that might be seen in a typical CATV installation Do not attach the RF cable at this time just verify the RF levels and or add the appropri ate attenuators at the transmitter input 2 7 Connections Connector Name Connector Type Connector Function RF Input F Type RF input to the transmitter Optical Output ay Optical output from the transmitter It is imperative that backreflections be controlled to very low levels Pin Function 5 V Power PPDa 2 RF Level Status 3 Laser Status STATUS OUTPUT 4 TEC Cooler Status Status Output 12345 O FAPT O 5 RF Power Meter AAR 6 Ground 7 Ground 8 Ground 9 Ground Accepts a standard IEC power cord Note The FC APC interface uses the wide key standard This means that the units are optimized for use with FC APC connectors that have a 2 14 mm wide alignment key Nar row key FC APC connectors 2 02 mm often referred to as JDS compatible may be used but will produce inferior results Standard FC PC connectors have a 2 36 mm wide key and cannot be plugged into either unit Power Rear Panel Power Input Revision 1 1 11 Installation Instructions 2 8 CATV Linx Mounting Brackets Adapts the 1RU chassis for use in an EIA standard 19 wide rack Handles For easy removal and installation of IRU chassis with mounting brackets into a 19 wide rack Power Switch Turns the transmitter on and off Power Indicator LED Green LED
30. tical fiber to the transmitter and the receiver see receiver IOM Be sure that the fiber has continuity and less than the maximum allow able optical loss Also be certain that the fiber is the proper size This product can only be used with single mode fiber The input power to the Rx must be less than 4 5 dBm The units will not work back to back The optical input level to the Rx can be ascertained by checking the color of the OPTICAL LEVEL indicator LED on the Rx Red LED Too much optical power Green LED Correct optical power level Yellow LED Not enough optical power 5 Connect the RF source VCR camcorder cable television etc to the RF input on the transmitter 6 Connect the AC power cord to the back of the transmitter Because the laser is thermometrically cooled and is a high performance item the startup and sta bilization sequence is 15 30 seconds long The front panel of the 2805T has four LED indicators One is green only and the other three are tri color LEDs The normal startup sequence is as follows Action Power LED RF Input Level LED Cooler Status LED Laser LED Unit Off Dark Dark Dark Dark Apply Power Green Yellow Note 1 Red Note 2 Red Note 2 5 20 Sec Green Yellow Note 1 Green Note 2 Red Note 2 8 14 Sec Green Yellow Note 1 Green Note 2 Green Note 1 Note 1 At any time the RF input will be yellow if the RF input level is too low green if it is within the nominal RF input band and red if t
31. ting temperature range See Section 1 3 page 2 for normal operating temperatures or contact factory Normally this LED will be red or change from red to green in the first ten seconds after power has been applied to the transmitter During this ten second initialization period the laser is held in shutdown mode while the rest of the circuitry initializes It is then switched to normal opera tion and the LED turns green If the LED turns red at any time other than in the first ten sec onds of operation this may indicate a laser failure Figure 2 1 Transmitter Front Panel Revision 1 1 Model 2805 CATVLinx PNS Transmitter 2 9 Rear Panel Physical Description gt CATV nx eee PART NO 2805TD SCSP 06 VW SRS leu 1310 nm SERIAL NO 310023 EE Fi Force Incorporated Guinn Innovators of Multimedia Fiber Communications _ _ _ _______ _ _ A Heat Sink Dissipates excess heat from the transmitter B RF Input F Connector RF signal input into the transmitter Warning label below advises not to exceed the RF input level or the transmitter may be destroyed C Optical Output SC APC or FC APC Optical output from the transmitter A dust cover should be placed over the connector when not in use OPTICAL LASER RADIATION IS PRESENT AT THE TRANSMITTER S CONNECTOR WHEN THE UNIT IS TURNED ON AVOID DIRECT EYE EXPOSURE TO THE INVISIBLE BEAM 431 80 Installation Instructions Status Outpu
32. uct Technical Bulletin Model 2805 CATVLinx PNS Transmitter Carrier to Noise Ratio dB I e aa LAT m A r LA AT a a a 412 4110 20 lt 8 27 26 5 BO OOS Receiver Optical Input dBm Figure 1 3 CNR vs Rx Optical Input and Channel Loading 2805T with 2808R 6 The vertical scale is the carrier to noise CNR ratio Five curves are plotted against these axes The top curve is the typical result when only 5 channels are transmitted through the link It can be seen that very high CNR results and in fact the output is quite usable with receiver optical inputs as low as 12 dBm corresponding to 22 dB of optical loss As the channel loading gets higher the maximum achievable CNR drops Note that the link CNR is usually specified for a received optical power of 2 dBm or more Thus a 2805TF SCAP 12 optical transmitter with an optical output of 12 dBm will provide optimal performance with up to 14 dB of optical loss at full channel loading If lower channel loading is used then the link can operate at higher optical losses and still provide exceptional CNR The recommended RF input level is shown in Figures 1 4 and 1 5 Exceeding the RF input level may instantaneously destroy the transmitter Both figures show the same information the transmitter level per channel ver sus the number of channels being transmitted however in Figure 1 5 the hor izontal scale is a logarithmic scale This shows that the under
33. ut the tissue against the end of the connector ferrule Put your fingernail against the tissue so that it is directly over the fer rule Now scrape the end of the connector until it squeaks It will sound like a crystal glass that has been rubbed when it is wet Revision 1 1 17 Operating Instructions Model 2805 CATVLinx PNS Transmitter 3 5 3 3 6 3 7 18 5 6 7 Use the microscope to verify the quality of the cleaning If it isn t completely clean repeat the steps with a clean tissue Mate the connector immediately Don t let the connector lie around and col lect dust before mating Air can be used to remove lint or loose dust from the port of a transmitter or receiver to be mated with the connector Never insert any liquid into the ports Connector Handling 1 2 NEVER TOUCH THE FIBER END FACE OF THE CONNECTOR Connectors not in use should be covered over the ferrule by a plastic dust cap It is important to note that inside of the ferrule dust caps contains a sticky gelatinous residue that is the by product of the making of the dust cap This residue will remain on the ferrule end after the cap is removed Therefore it is critical that the ferrule end be cleaned thoroughly BEFORE it is mated to the intended unit Troubleshooting Common problems include lack of continuity in the optical fiber lack of power or reversed power or improper input levels The units are designed to work with a 75 Ohm syst
34. utput a connector should be attached that is connected to a fiber This ensures that all light is confined within the fiber waveguide virtually eliminating all potential hazard Revision 1 1 13 Installation Instructions Model 2805 CATVLinx PNS Transmitter 2 11 2 12 14 4 NEVER look in the end of a fiber to see if light is coming out NEVER Most fiber optic laser wavelengths 1310 nm and 1550 nm are totally invisible to the unaided eye and will cause permanent damage Shorter wavelength lasers e g 780 nm are visible and are very damaging Always use instru ments such as an optical power meter to verify light output 5 NEVER NEVER NEVER look into the end of a fiber on a powered device with ANY sort of magnifying device This includes microscopes eye loupes and magnifying glasses This WILL cause a permanent irreversible burn on your retina Always double check that power is disconnected before using such devices If possible completely disconnect the unit from any power source 6 Ifyou have questions about laser safety procedures please call Force Incor porated for assistance before powering your product A Sales Engineer or Applications Engineer may be reached at 540 382 0462 7 Laser safety classes for the Model 2805 are as follows Class Wavelength Range Optical Power Accession Limits Hb 180 nm to 400 nm Varies with and exposure time 400 nm to 10 nm 0 5 Watt Shipping and Handling Precautions
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