Between the mechanical splice and patch panel B panel B is 400m of optical fiber.The loss of the 400m of optical fiber is 1.4db.The light energy entering the mated pair at patch panel B is -11.85dBm,which should be recorded on the vertical axis.As we already know,ANSI/TIA-568-C.3 allows a maximum loss of only 0.75dB for a mated pair.The minimum amount of light energy exiting the mated couple should be -12.6dBm.If we ignore the loss for the 5m patch cord between patch B and the receiver,the power available to the receiver is -12.6dBm.This is the absolute value recorded on the vertical axis.

The next in this process is tantamount to record the horizontal axis values.Working from left to right starting at the transmitter,the first value recorded on the horizontal axis is zero.It is taken from this point that we will record the successive segments of optical fiber.

The opening segment of optical fiber is the 5m patch cord.With an overall length of 810m,it's not practical to draw the 5m patch cord to scale unless you have a very large sheet of paper.Looking at Figure 32.4,you can see that the first segment on the horizontal axis long enough to clarify that the 5m patch cord is a separate segment of optical fiber.The second value registered on the horizontal axis is 5m.The LC LC Fiber Patch Cord is housed in a LSZH (Low-Smoke, Zero-Halogen) flame retardant jacket, to ensure minimal smoke, toxicity and corrosion when exposed to high sources of heat, in the event of a fire – an ideal solution for use in industrial settings, central offices and schools, as well as residential settings where building codes are a consideration.

The second segment is a 400m span of optical fiber from patch panel A to the mechanical splice. The second segment is a 400 spans of optical fiber from patch panel A to the mechanical splice.The resulting value recorded on the horizontal axis si 405m.

The third segment of optical fiber is a 400m span from the mechanical splice to patch panel B，the succeeding value recorded in optical fiber is 400m span from the mechanical splice to patch panelB，the resulting value recorded on the horizontal axis is 805m.

The concluding segment of optical fiber is the 5m patch cord that connects the receiver to patch panel B.The last value recorded on the horizontal axis is 810m.

All the values for the vertical and horizontal axes are recorded. The final step is to draw a series of lines that graphically represent the recorded values. the first line segment will be a horizontal line from -8.0dBm on the vertical axis to the 5m point on the horizontal axis, this line represents the patch cord that connects the transmitter to patch panel A,The line is horizontal because the patch cord loss is insignificant At the end of this ,vertical line will be drawn that runs from -8.0dBm;it represents the loss for the mated pair at patch panel A. these cables are UPC or PC polish optional, with various kinds of fiber optic cable including Riser rated, Plenum rated and RoHS compliant. These multimode duplex LC-SC Patch Cord are custom length and cable colors. The cables can be with 50/125 or 62.5/125 multimode optical fiber. OM3 multimode duplex fiber cables are found on request.LC-LC Single Mode Patch Cord are made strictly depending on industry and international standards. They are 100% tested during the production. Accessories including the connectors, adapters and attenuators are available

The third line will extend from the 5m point on the horizontal axis to the 405n point. It will be a sloping line from left to right that goes from-8.75dBm on the vertical axis to-10.15db.This line is the loss for the 400m section of optical fiber from patch panel A to the robotic space.At the end of this line,a vertical line is drawn from -10.15dBm to -10.45dBm to represent the loss for the mechanical splice.

The fifth line will extend horizontally from the 405m point to the 805m point.This line will slope from-10.45dBm on the vertical axis to --11.85dBm;it represents the loss for the 400m section of optical fiber from the mechanical splice to patch panel B，At the end of this line ,vertical line will be drawn from-11.75dBm to -12.6dBm.Representing the loss for the mated pair at patch panel B.

The closing line drawn is a horizontal line from the 805m point on the horizontal axis to the 810m point.This line represents the patch cord from patch panel B to the receiver. There is not any slope in this line because the loss for the patch cord is insignificant.If everything has been drawn correctly,your drawing should look like Ffigure 32.4.

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