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Model 2807 PDS/PNS Mini-Node CATV Receiver Installation Guide

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1. connectors that have a 2 14 mm wide alignment key Narrow key FC APC connectors 2 02 mm may be used but will produce inferior results Standard FC PC connectors have a 2 36 mm wide key and cannot be plugged into to the unit 1IOM2807 Revision 2 2 Model 2807 PDS PNS Mini node CATV Receiver User Manual Operation of the LCD Display The top of the 2807 Mini node contains a 16 character x 2 line LCD display with backlight This LCD is used to display receiver optical input power the current status of the internal RF equalizer and the status of the inter nal digital RF attenuator The UP DOWN SELECT buttons are used to display and or configure parameters for the receiver A typical display is shown below EQ TILT ATN 23dB OPT IN 3 2 dBm RF CONTROL AND DISPLAY 825 Park Street http www for Ea TILTATN 23qB OPT IN 3 2 dBm RF CONTROL AND DISPLAY 825 Park Street http www for OR EQ FLATATN 23dB OPT IN 3 2 dBm RF CONTROL AND DISPLAY Ea TILT ATN 23dB OPT IN 3 2 dBm 825 Park Street http www for RF CONTROL AND DISPLAY 825 Park Street http www for As the UP button is pushed repeatedly the attenuation will increase to 31 dB and the display will show MAX as shown below ur EQ TILT ATN MAX OPT IN 3 2 dBm setect vown 825 Park Street http www for RF CONTROL AND DISPLAY As the DOWN button is pushed repeatedly the attenuation will d
2. repair or replacement only after receiving authori zation from the Customer Service Manager CSM and only with a valid Return Material Authorization RMA number The criteria determining whether a product is covered under this policy are described below and RMA numbers will be issued only under these guidelines For Return Requests that do not comply with the following criteria the CSM must have approval from the VP Operations or designee prior to issuing an RMA number Products Returned for Credit Non Distributor Customers will be allowed to return product for credit only under the following conditions e Products are current standard Force products as per the price list e Products are in new unused and undamaged condition and are in the original packaging e Products were originally shipped to the customer requesting Return Authorization e Request for return is for a valid reason as determined by Force Inc e Products were shipped to the customer less than 3 months prior to return request e Customer receives proper Return Material Authorization prior to returning the product e Customer pays return freight and insurance if requested by Force Inc Customers will be issued a credit for the original selling price of the product less a 20 restocking charge after verification that the product meets the criteria as stated above Payment to customers with no outstanding bal ance will be made 30 days after requested by customer Prod
3. APC optical connectors somewhere in the system These cause unacceptable levels of backreflection 3 The RF input spectrum may not be flat It is possible to have a green RF level LED even if the input spec trum has a large amount of tilt All Force CATV products are designed to operate with a flat input spec trum 4 There may be extraneous i e non video signals in the input RE Be sure to filter out all non desireable signals 5 The optical input power at the receiver may be too low In this case the optical status LED will be yellow See Figure 1 for the expected CNR versus the channel loadingand received optical power 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 system Consult IOM 2804 or IOM2805 for additional troubleshooting of the transmitter If problems persist contact the factory Problem Check Comments No optical power out of Tx Check Tx AC power connection If AC power is connected check the primary AC power source to verify it is working Contact Force Inc if no cause for this problem can be found No optical power at the Rx Check optical power output at the Tx If there is optical power at the Tx out put verify proper fiber is connected to the Rx If the proper fiber is connected ensure the integrity of the fiber Signal out of
4. CNR is usually specified for a received optical power of 3 dBm or more Thus a 2804TK SCAP 12 optical transmitter with an optical output of 12 dBm will provide excellent performance with up to 15 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 A number of curves are plotted 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 24 dB of optical loss As the channel loading gets higher the maximum achievable CNR drops 1IOM2807 Revision 2 2 4 Model 2807 PDS PNS Mini node CATV Receiver User Manual 5 This product must be used only with APC type optical connectors or fusion spliced connections There is some folklore which suggests that the only critical backreflection is the one closest to the transmitter Our experience does not support that view We find that all backreflections matter regardless of their distance from the transmitter 6 The receiver is powered by the Force Inc Model PS200 AC adapter See TB043 for complete specifica tions 7 Most parameters are relatively unaffected by varying temperature A moving air environment is recom mended at ambient temperatures above 35 C 8 Humidity is RH non condensing 9 The Model 2
5. SELECT button again will cause the unit to enter the attenuation update mode The ATN text on the display will flash Hitting the SELECT button additional times will cause the unit to toggle between the equalization update mode and the attenuation update mode Again if no button is pressed for 20 seconds or more the unit will revery to the idle display mode RF Equalization Update Mode When the unit is in the equalization update mode the E text will be flashing once per second the UP and DOWN push buttons will toggle the unit between the FLAT and TILT modes In FLAT mode the RF output will be flat versus frequency assuming that the RF into the optical transmitter was flat In the TILT mode the RF output will be tilted upward by 10 dB over the full receiver bandwidth again assuming that the RF into the optical transmitter was flat 1IOM2807 Revision 2 2 10 Model 2807 PDS PNS Mini node CATV Receiver User Manual RF Attenuation Adjust Mode When the unit is in attenuation adjust mode the ATN text will flash once per second the UP and DOWN push buttons are used to adjust the internal digital RF attenuation It may range from 0 dB to 31 dB Each push of the UP and DOWN push buttons will increment or decrement the numerical value by one Once a value of 0 dB is reached further pushes of the DOWN button will cause the display to show MIN for two sec onds Once a value of 31 dB is reached further pushes of the UP button will ca
6. on most flat dry surfaces Secure panhead screws through mounting holes provided at the base of the module If the unit is placed in a location where temperatures may exceed 38 C 100 F a good heat sink should be secured The use of silicone thermal pads is recommended between the module and the plate to maximize heat transfer Units must have their chassis connected to a good earth ground 1IOM2807 Revision 2 2 Model 2807 PDS PNS Mini node CATV Receiver User Manual Items Provided The following is a list of items provided with each Model 2807 Qty AR 1 per connector Items Required Qty AR 1 per Rx A per unit AR AR Inspection Mfr P N Force Inc 2807NX SFSP Any Any Mfr P N F 2804T or orce Inc 2805T Force Inc PS200 Any Any Any Any Any Any Any Any Description PDS PNS Mini node CATV Receiver SM 1310 1550 nm SC APC Standard FC APC Optional Active Device Receptacle Caps for RF and Optical Connections Description 110 Ch PDS Transmitter SM 1310 nm SC APC Std FC option 77Ch PNS Transmitter SM 1310 nm SC APC Std FC option Rx Power Supply 15 Volts 950 mA DC Power Supply 4 pin Power Connector 6 32 Panhead Mounting Screws with Lock Washers and Nuts for Rx EIA 19 Grounded Equipment Rack for Tx Straight Screwdriver 9 125 um Single mode Fiber Remove the unit from its shipping container Any in shipment damage that may have occurred should be vis
7. the proper size This product can only be used with single mode fiber The input power to the Rx must be greater than 8 0 dBm and less than 4 5 dBm The units will not work back to back 5 Connect the RF source VCR camcorder cable television etc to the RF input on the transmitter 6 Connect the RF output on the receiver to the monitor input The monitor input should present a 75 Ohm impedance 7 Connect the AC power cord to the transmitter and connect the Model PS200 wall mount power supply to the receiver WARNING Optical laser radiation is present at the optical connector when the unit is acti vated AVOID DIRECT EYE EXPOSURE TO THE BEAM 1IOM2807 Revision 2 2 11 Model 2807 PDS PNS Mini node CATV Receiver User Manual 8 The unit is now fully operational Verify the proper operation of the link by following the steps below RF attenuation and RF equalization may be adjusted by the user See page 9 for details on making these adjustments Performance Verification No user maintenance is required The Model 2807 Mini node CATV receiver contains no user serviceable parts and requires no routine service Contact the factory if the unit requires warranty repair work Once the units have been installed verify that the picture quality is good If the picture quality is not good there are sev eral likely causes 1 The optical fiber may have large backreflections Use an OTDR to examine the fiber run 2 There may be non
8. 807 PDS PNS Mini node receiver is optimized for single mode operation only 1IOM2807 Revision 2 2 5 Model 2807 PDS PNS Mini node CATV Receiver User Manual Installation and Operation General Installation Instructions The installation of these units is very simple There are no special unpacking instructions except that care should be taken to handle the 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 outlets or above heat producing units such as large power supplies and tube type equipment Observe temperature and relative humidity requirements specified on page 4 1IOM2807 Revision 2 2 6 Model 2807 PDS PNS Mini node CATV Receiver User Manual Unit Physical Description 8 45 k Ai A Optical Status Tri colored LED When lit green indicates the unit is receiving the optimum optical input power If the optical power falls below optimum the LED will turn yellow If the optical power rises above optimum the LED will turn red B LCD Display Displays the receiver optical input level RF attenu ator setting and equalization setting The RF lev
9. G OPTICAL BROADCAST SYSTEMS Model 2807 PDS PNS Mini Node CATV Receiver Installation Guide and User Manual IOM2807 Revision 2 2 March 2006 Laser Safety Warning The optical emissions from the return path module optical output and connected optical fiber are laser based and may present eye hazards Follow all safety precautions ANGERD O a INVISIBLE LASER RADIATION Invisible laser radiation X AVOID DIRECT EXPOSURE TO BEAM emitted frorn this connector Indium Gallium Arsenide Phosphide 100 mW max power output Class IIIR Laser Product This product complies with applicable BRH standards under the Radiation Control for Health and Safety Act of 1968 Technical Support If 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 USA 800 732 5252 TEL 540 382 0462 By Fox 540 381 0392 By Email csr sales forceinc com By Phone Monday through Friday 8 00 am to 5 00 pm EST 825 Park Street Christiansburg VA 24073 USA 800 732 5252 TEL 540 382 0462 FAX 540 381 0392 e csr sales forceinc com www forceinc com 2006 by Force Inc Force reserves the right to make changes to the product described in this document in the interest of product improvement Model 2807 PDS PNS Mini node CATV Receiver User Manual Contents Lase
10. Rx is noisy Check optical power at the Rx If the optical status LED is yellow the optical input power is too low Verify proper fiber is connected to the Rx If the proper fiber is connected ensure the integrity of the fiber Be sure to ground the case of the Tx and Rx Also verify that all optical connections are APC type No signal out of Rx Verify the input signal at the Tx See the transmitter IOM for the required input signal level Verify input signal at Tx The Tx input must be within the specs given in the transmitter IOM A larger signal will cause distortion Signal out of Rx is distorted Verify fiber size Single mode fiber must be used with this product Verify RF output level If the internal RF attenuator is too low the RF output may be overdriven 1IOM2807 Revision 2 2 12 Model 2807 PDS PNS Mini node CATV Receiver User Manual Cleaning If the link needs to be cleaned avoide 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 scratched connector end faces will greatly reduce the unit s performance Do not try to use fluids or high pressure air to clean our the optical ports Foam tipped swabs such as the 2 5 mm Mini Foam Swab offered by Fiber Instrument Sales P N F1 0005 may be saturated with denatured alcohol and inserted into the optical port for clean
11. a spectrum analyzer to verify that the levels are appropriate If instrumentation is not available to actually measure the RF levels Force recom mends adding 40 dB of attenuation at the transmitter input 40 dB of attenuation will adequately protect 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 appropriate attenuators at the transmitter input Safety Precautions The optical emissions from the return path units are laser based Class IIIb and may present eye hazards if improperly used NEVER USE ANY KIND OF OPTICAL INSTRUMENT TO VIEW THE OPTICAL OUTPUT OF THE UNIT Complete laser safety procedures may be downloaded at http www forceinc com techbull laser safety procedures pdf As always be careful when working with fibers Fibers can cause painful injury if they penetrate the skin Power up and Operation 1 Install the links as described on page 6 2 Measure the RF level BEFORE making any connections to the transmitter This measurement is described on page 11 3 Clean the optical connectors Download http Avww forceinc com techbull optical connector cleaning pdf for complete cleaning instructions Be sure all connections are APC type 4 Connect the optical fiber to the transmitter and the receiver Be sure that the fiber has continuity and less than the maximum allowable optical loss Also be certain that the fiber is
12. ecrease to 0 dB and then the display will show MIN as shown below EQ TILT ATN MIN OPT IN 3 2 dBm RF CONTROL AND DISPLAY 825 Park Street http www for 1IOM2807 Revision 2 2 9 Model 2807 PDS PNS Mini node CATV Receiver User Manual The optical input text OPT IN will show one of the following If the optical input is greater than 5 0 dBm the display will show OVLD EQ TILT ATN 23dB OPT IN OVLD RF CONTROL AND DISPLAY 825 Park Street http www for RF CONTROL AND DISPLAY 825 Park Street http www for If the light level is greater than or equal to 12 0 dBm and less than or equal to 5 0 dBm the display will show the actual input level with a resolution of 0 1 dB and an absolute accuracy of 0 6 dBm EQ TILT ATN 23dB OPT IN 3 2 dBm RF CONTROL AND DISPLAY 825 Park Street http www for When the display select button is pushed 3 times the display will become that shown below This is also the temporary display at power up FORCE TING Ver 2 03 cao RF CONTROL AND DISPLAY 825 Park Street http www for Control Button Operation When no button has been pushed for 20 seconds or more the display will revert to idle mode In idle mode the UP and DOWN buttons are ignored In order to change the setup of the Model 2807 Mini node push the SELECT button This will cause the unit to enter the equalization update mode The E text on the display will flash Hitting the
13. els may be ad justed by the user via the Up Down Select Buttons items C and D See page 9 for details C Up Down Buttons Allows the user to adjust the RF attenuator and equalization settings D Select Button Selects either RF attenuator or equalization setting for adjustment E Unit Serial Number The unit serial number is a code that identifies the start date of the product warranty F Optical Input SC APC std FC APC Option Optical Input to the receiver PART NUMBER 2807NA SFSP_ ev secr EI 16 DIA 4 MM A 2 50 MOUNTING HOLES 63 50 4 PLACES G Optical Ouptut SC APC std FC APC Option Optional optical output from the return path module when installed Invisible laser radiation emitted from the optical output con nector and the connector that attaches to the receiver Avoid direct eye contact with the beam H Power 4 pin Weidmuller Connector Supplies power to the re ceiver See page 8 for pin connections RF Output F Connector RF output from the receiver J RF Test 20 dB F Connector Allows the user to measure the re ceiver RF output levels 20 dB down from the primary output K RF Return Test 20 dB F Connector Allows the user to measure the return path RF signal level 20 dB down from the return path signal level Figure 2 Model 2807 Mini node CATV Receiver Dimensions in parentheses are in millimeters Module Placement Units may be mounted in any orientation
14. he warranty for these products As a result product s should be accepted upon return for rework or repair in accordance with Force s warranty policy Active Out of Warranty 1IOM2807 Revision 2 2 15 Model 2807 PDS PNS Mini node CATV Receiver User Manual Force will accept return of product under this category as long as the sale of the product occurred less than five 5 years prior to the return request The product serial number should aid in determining the age in cases where information is not in the data base Rework or repair will be in accordance with Force s warranty policy and will include an evaluation charge which will be quoted to the customer prior to the return of the product The evaluation charge is 20 of the current list price of the product or a minimum of 250 whichever is greater The customer will either need to provide a purchase order number with approved credit or a credit card number before receiving an RMA number Force cannot guarantee its ability to repair or rework the product If costs to repair the product exceed the evaluation charge the customer will be notified of such charges and instruction to proceed with repairs will be indicated either by a P O number or credit card autho rization Obsolete Product Out of Warranty Force is not obligated to accept requests for product under this category The CSM with prior approval from Operations will be responsible for approving return requests for product
15. ing 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 Download _http Avww forceinc com techbull optical connector cleaning pdf for complete cleaning instruc tions 1IOM2807 Revision 2 2 13 Model 2807 PDS PNS Mini node CATV Receiver User Manual Warranty and Return Policy 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 pur chase Force Obligations Force will at its discretion and expense repair any defect in materials or workmanship or replace the product with a new product Force will upon receipt of the return evaluate the product and communicate to the cus tomer 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 rea sonable time or if subcomponents of the unit have been obsoleted or discontinued then Force has the option to provide an equivalent unit 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 mai
16. nits Notes Power Supply Voltage 10 12 15 Voc 6 Power Dissipation 10 Watts Environmental Characteristics Min Typ Max Units Notes Operating Temperature Range 0 50 CG 7 Storage Temperature Range 20 70 C Humidity RH non condensing 0 90 8 Physical Characteristics Min Typ Max Units Notes Weight 1 0 Ibs 0 45 kg Physical Dimensions 8 45 x 2 95 x 1 12 in 215 x75 x29 mm Specification Notes 1 2 3 4 The receiver bandwidth is 50 860 MHz when a return path transmitter is installed The 2807 Mini node contains a user programmable digital RF attenuator which is adjustable from 0 dB to 31 dB attenuation The user can adjust this RF attenuator to achieve 38 dBmV per channel RF output over the full rated optical input power See page 9 for LCD operation details The 2807 Mini node contains a user programmable RF equalization function The user has the choice of flat response no tilt or 10 dB tilt via the digital control panel See page 9 for LCD operation details Figure 1 shows the CNR versus received optical input power and number of channels 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 CNR Carrier to Noise Ratio dB 38 36 PALE EEE EEE 12 11 10 9 8 7 6 5 4 3 2 1 O 1 2 3 4 Receiver Optical Input dBm Figure 1 CNR vs Receiver Optical Input at 110 Channels The link
17. nte nance or 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 warranty In addition cost of repair by unauthorized persons within the warranty period of the product will not be cov ered 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 fitness 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 goodwill 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 cus tomer s sole remedy for defects in material and workmanship Product Return Policy 1IOM2807 Revision 2 2 14 Model 2807 PDS PNS Mini node CATV Receiver User Manual Customers will be permitted to return products for credit
18. provide reasonable protection against harmful interfer ence 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 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 Optical and Video Characteristics 25 C SM Fiber Note 9 Min Typ Max Units Notes CATV Receiver Operating Wavelength 1290 1310 1330 nm Operating Wavelength 1490 1510 1610 nm Optical Input Power 8 0 4 5 dBm Channel Loading 110 Channels Bandwidth 50 860 MHz 1 Required Fiber Bandwidth 2 000 MHz Output Impedance 75 Ohms RF Output Level 38 dBmV 2 RF Equalization 0 10 dB 3 Output Return Loss 16 dB Composite Second Order CSO 63 dBc Composite Triple Beat CTB 66 dBc Carrier to Noise Ratio CNR See Figure 1 4 Backreflection Tolerance 50 dB 5 Return Path Modules Operating Wavelength 1280 1310 1340 nm Operating Wavelength 1490 1550 1610 nm RF Input Power 23 28 33 dBmV Optical Power FP Laser 1 5 mW Optical Power DFB Laser 3 0 mW Bandwidth 5 42 MHz 1IOM2807 Revision 2 2 3 Model 2807 PDS PNS Mini node CATV Receiver User Manual Electrical Characteristics Min Typ Max U
19. r Safety Warning 1 Technical Support 1 Product Specifications 3 FCC Notice 3 Optical and Video Characteristics 3 Electrical Characteristics 4 Environmental Characteristics 4 Physical Characteristics 4 Specification Notes 4 CNR vs Receiver Optical Input at 110 Channels 4 Installation and Operation 6 General Installation Instructions 6 Unit Physical Description 7 Model 2807 Mini node CATV Receiver 7 Module Placement 7 Items Provided 8 Items Required 8 Inspection 8 Connections 8 Operation of the LCD Display 9 Control Button Operation 10 RF Equalization Update Mode 10 RF Attenuation Adjust Mode 11 Optical Status LED 11 Measuring RF Input Levels at the Return Path 11 Safety Precautions 11 Power up and Operation 11 Performance Verification 12 Troubleshooting 12 Cleaning 13 Warranty and Return Policy 14 Warranty 14 Force Obligations 14 Exclusions 14 Product Return Policy 14 Products Returned for Credit Non Distributor 15 Products Returned for Repair or Replacement 15 Active Product Under Warranty 15 Obsolete Product Under Warranty 15 Active Out of Warranty 15 Obsolete Product Out of Warranty 16 Receiving an RMA for Returns 16 1IOM2807 Revision 2 2 Model 2807 PDS PNS Mini node CATV Receiver User Manual Product Specifications FCC Notice The Model 2807 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
20. s falling under this category Receiving an RMA for Returns Customers requesting RMA numbers for any reason will be instructed as to how and where to ship the prod ucts being returned and will be directed to show the RMA number on all external packaging and documenta tion The CSM is responsible for providing any necessary instructions to the customer to ensure proper handling of the retuned material Upon receipt of the product all Force personnel are to process the return as per SP002 Handling of Customer Returns Contact the factory at USA 800 732 5252 or TEL 540 382 0462 to request an RMA 1IOM2807 Revision 2 2 16
21. u ally 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 Connections Connector Name Connector Type Connector Function Optical Input SC APC or FC APC Optical input to the unit SC APC or FC APC Optical output from the return path unit Optical Out It is imperative that backreflections be controlled to very low levels This product must be used only with angle physical contact APC connectors Pin Function 1 12 Volts DC 2 Ground Optical Status Flag This is an open drain output that can sink up to 10 3 mA at 12 Volts An external pull up Power 4 Pin Weidmuller Connector resistor is required This pin will be pulled low when the optical input is within optimal range Optical Input Power Meter This is an analog voltage proportional to the 4 amount of light reaching the detec tor The response is 1 Volt per mW of input light RF Output F Connector RF output from the unit RF Test F Connector RF Test 20 dB output for receiver RF Return Test F Connector RF Test 20 dB output for return path module if installed Note The FC APC interface uses the wide key standard This means that the units are optimized for use with FC APC
22. ucts Returned for Repair or Replacement Force s response to a customer product return request will be based upon whether or not the product is still part of Force s standard product offering and whether or not the product is still under warranty A product will be considered active if it is currently part of Force s standard product offering Active products are denoted in Force s current price list Obsolete products are not considered active A product is considered under warranty in accordance with Force Inc Product Warranty Prior to receiving an RMA number the customer will be asked to discuss the reason for the return with Tech nical Support to try to resolve the problem This discussion will be documented to aid with troubleshooting and repair of the product Any detail the customer can provide will expedite the process once the product is received The criteria denoted above will cause any incoming returns to fall into one of the following categories A The product is currently active and is under warranty B The product is currently obsolete but is still under warranty C The product is active but out of warranty D The product is obsolete and out of warranty Active Product Under Warranty Force will honor the warranty for these products As a result product s should be accepted upon return for rework or repair in accordance with Force s warranty policy Obsolete Product Under Warranty Force will honor t
23. use the display to show MAX for two seconds Optical Status LED The optical status LED indicates the general status of the Model 2807 Mini node The presence of any color light indicates that the unit is powered If the light into the Model 2807 Mini node exceeds 4 5 dBm the LED will turn red indicating that excessive optical power is being applied to the optical input If the light into the 2807 Mini node is less than 8 0 dBm the LED will turn yellow indicating that insufficient light is being applied to the optical input If the light into the 2807 Mini node is greater than or equal to 8 0 dBm and less than or equal to 4 5 dBm the LED will be green indicating that the optical input is within the optimum range Each transition has a hysteresis of 0 2 dB Measuring RF Input Levels at the Return Path Excessive RF input to a fiber optic CATV transmitter WILL destroy 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 1 Using a spectrum analyzer determine that the RF level input to the transmitter is within safety bounds 2 Ideally the RF level should be checked with an instrument such as

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