野外型光接收机说明书

The open country type light accept machine Usage manualModel number:AM750-BX4Product function brief introductionA, function characteristics:XY open country type series light the receiver is a new generation cabled T.V. double to light point of contact product, it is in the HFC network completion light signal go to radio frequency signal of conversion process. Should series light receiver adoption import superior quality light electricity conversion machine, the radio frequency (RF) enlarge adoption the PHILIP well-known company to enlarge a mold piece, have low noise, higher of output electricity even, more and smallly and not the line lose true, and have to move electricity even control, light power designation etc. function. Output the way can depend on a circumstance choice four allotment or two lord output two branch output.The outer shell adoption aluminum metal alloy die-casting, watertightness dust palliative, spread hot effective.Aim at charged barbed wire net electric voltage unsteady, especially the usage scope of the adoption electric voltage breadth of switch power supply. The whole machine function index sign Gao, credibility good, is carry on a CATV network reformation with get stripe of ideal choice.Two.Technique parameterNote:CNR, CSO, the CTB lose true parameter of test condition:With light shoot the machine connect with each other, 59 the road PAL-D signal importation, the 0 dBm accept.Three.Work principleWork principle:Formerly carry light shoot the machine spread to deliver of light signal, process light receiver in of light electricity conversion machine, will light signal conversion is telecommunication number, inside this receiver have light power monitor electric circuit, can examination accept light whether the size of the power match engineering design or not, light electricity conversion mold piece output's radio frequency signal process front place big, be divided into two road signals, two roads be reducing a machine toward the Shuai, balanced machine again respectively carry on power to enlarge, end from four output output radio frequency signal. This light receiver has back to spread function, should return to spread glint module in order to put a slice of type, can basis engineering design choice.Return to spread radio frequency signal through balanced, enlarge, the Shuai reduce.Radio frequency adjust is an accommodation electricity even, again through return to spread a laser machine conversion for light the signal send out.age elucidationAC60 V concentration power supply light the usage of the receiver1.The usage lightning receive guidelines to choose to use to shield the body thicker coaxial cable and lower power supply on the electric cable of exhaust.2.Check light receiver of importation whether electric voltage satisfy request 30-65 V or not, otherwise should adjust electric voltage.Return to reply while winning an election to choose transformer power supply dissimilarity of importation electric voltage choice correspond offile:While winning an election to choose switch power supply, it is only to need check electric voltage whether satisfy request then.3.Choose to use of concentration the power supply machine should have to goodly shield to insulate function and prevent°from leading from the power supply system into every variety the interference signal get into CATV system.4.The system not yet finished is kind to prohibit to switch on electricitya test before connecting ground.5.AC power electric wire road of havings contact point have to firm credibility, in order to prevent damage get an electric shock.6.While adjusting to try measure the instrument should have already insulate equip, in order to prevent damage instrument.7.Switch on electricity to adjust before try, each switch should constitution is:K1:OFF K2:OFF K3:OFFK4:OFF K5:OFF then basis demand choice correspond of port is ONOutside the power supply AC220 V light the usage of the receiver:age front should check exchanges whether electric voltage meet request or not, choose to use transformer for the 150-250 V while choosing to use switch power supply is 180-230 V.2.Before switch on electricity test should test exchanges importation back track outward insulate of hull electric resistance, in order to prevent short circuit, result in electric leakage.Six.Adjust to try a step:e up the power account a test light receiver importation fiber optic of importation power, it should at-with 5~2 dBm, recommend usage valueis-3~-1 dBm, light power lead low or lead Gao will cause letter Zao ratio to become bad the signal quality be not good, such as big at the 2 dBm, should in the light the Han deliver the system add light the Shuai reduce a machine, assurance light receiver of importation light the power match design request.2.Go the fiber optic cable into the Han and light receiver tail Han conjunction together, and switch on electricity observation to have just like often phenomenon.3.Light power examination:Factory constitution at importation light power is, as follows value, -5, -3, -1, 0, 2:The green correspond the indicator will be bright:Red etc. bright then mean light power for low(-5 dBm) perhaps have no light importation.4.Output an electricity even of testUse strong instrument test light the radio frequency of the receiver output, if light receiver from should output provide power supply(60 V concentration power supply), can test output examination, according to engineering design request, regulate correspond of the Shuai reduce a machine and balanced machine, make output electricity even match design to request back to spread adjust of radio frequency signal to try.1.Return to spread adjust of radio frequency signal to try just toward the signal of each output even return to deliver a letter number of importation, regulate to return to electricity of deliver a letter the number peacetime, have to carry on adjusting to try towards returning to deliver a letter number of each ly input, make the importation arrive back to spread light blast-off mold piece of electricity even consistent.2, adjust to try a method:☆ Use the strong instrument test back to deliver into electricity even examination, according to test electricity even value, regulate correspond of the Shuai reduce a machine and balanced machine, make the importation arrive back to spread blast-off laser machine of electricity even match design request:The ☆ use up power to account a test back to spread a laser machine of outputpower.Seven, usage regulation☆ Test each output of electricity peacetime, correspond of conduct electricity a switch have to be placed in to break to open appearance, in order to prevent damage test appearance:The ☆ is test each radio frequency output or examination, each other output the beard mount 75 Europes to match load, otherwise may cause test result prohibit indeed:The ☆ test complete should check inside machine whether have a foreign body, whether each plug-in is firm or not:☆ Check without any error empress tight solid outer shell screw and watertightness set, in order to prevent enter water enter dust:The ☆ light receiver should avoid place the area is at the strong magnetic field and strong electromagnetism interference:The ☆ light receiver has to connect a ground of good, connect a ground of electric resistance not big at 4 Mu in Europes.Warning:Attention get an electric shock have to usage electric outlet that have safety's marking, electric outlet with connect ground should as for can't use to easily come in contact with of place:Long time don't use a hour should pull out power supply.While keeping off damp fieldwork must the Ning tight screw, assurance machine inner part can't enter water.Rainy day can't touch machine outside the not in power or take an electricity to carry on maintain.The non- profession technical personnel can not take an electricity to open outer shell to carry on maintain.Having any question to this equipments in the usage can contact the region dealer。