barcode scanner vb.net textbox , for Unit dB/km dB dB dB dB dB dB dB dB dB dB dB dB dB dB dBm in Software

Generating QR Code in Software , for Unit dB/km dB dB dB dB dB dB dB dB dB dB dB dB dB dB dBm

17 18 19 20 21 22 23 24 25 26 27 28 29

Minimum Tx OMA, PTXOMA Minimum Tx power, PTX use [Eq (211)] Optical extinction ratio, Rex Optical extinction ratio penalty, ex [Eq (364)] Receiver overload power Rx sensitivity OMA SOMA @ BER ______ & OSNR ______ Minimum transceiver budget (L17 L22) Minimum measurable Rx receive power (L18 L10 ) Maximum measurable Rx power <L21 (L16 L10 ) Remaining margin BoL must be >0 (L23 L15) System aging Cable repair Remaining margin EoL must be >0 (L26 L27 L28)

P Tx (average)

Optical power (dB)

PS (average)

laser can be used instead (note this test is traffic affecting) The convention for fiber loss measurement is to perform span measurements in both directions in a fiber and then to average the results This is because the measurements will differ slightly in each direction, primarily due to core mismatches at connections and splices A large difference in measurement can mean a bad fiber splice or connector If the transmission direction for the fiber is known, then one measurement can be performed in the same direction as the signal transmission Typical measurement precision for most network designs is 01 or 001 dB A simple loss measurement procedure is shown in Fig 25 using two fiber jumpers, laser source at proper wavelength, and calibrated power meter The First step as shown in Fig 25a is to measure the loss with only test jumpers This value is recorded as the reference value If the power meter can measure loss in dB, then the zero button on the meter is pressed This sets the meter reading to 0 dB Next the fiber under test is added as shown in Fig 25b If the power meter reading is in dB, then the loss of the fiber under test is displayed If the power meter reading is only dBm, subtract the reference value from the fiber under test value to obtain the fiber loss Fiber link loss measurement can also be performed using an OTDR but is less accurate than a power meter measurement This is because the OTDR determines fiber loss indirectly by estimating the

Line # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

OMA Budget for Fiber Number 3, for Tx site A to Rx site B Fiber loss Splice loss Connector loss Other fiber loss _________ Fiber loss (sum L1 to L4) WDM insertion loss DCM insertion loss Amplifier gain (show as neg) Other component loss ______ Link loss (sum L5 to L9) TDP/CD penalty PMD penalty PDLTmax penalty Nonlinear penalties total Total link loss with penalties (sum L10 to L14) Maximum transmit power

Specification Values at 1310 nm Unit dB/km dB dB dB dB dB dB dB dB dB dB dB dB dB dB dBm Unit Value 035 01 03 Quantity 110 9 2 Line Totals 385 09 06 00 54 00 00 00 00 54 10 0 0 0 68 20

TABLE 26 OMA Budget Example (Continued)

Line # 17 18 19 20 21 22 23 24 25 26 27 28 29

OMA Budget for Fiber Number 3, for Tx site A to Rx site B Minimum Tx OMA, PTxOMA Minimum Tx power, PTx [Eq (211)] Optical extinction ratio, Rex Optical extinction ratio penalty, ex [Eq (364)] Receiver overload power Rx sensitivity OMA SOMA @ BER______ & OSNR ______ Minimum transceiver budget (L17 L22) Minimum measurable Rx receive power (L18 L10 ) Maximum measurable Rx power <L21 (L16 L10 ) Remaining margin BoL must be >0 (L23 L15) System aging Cable repair Remaining margin EoL must be >0 (L26 L27 L28)

Specification Values at 1310 nm Unit dBm dBm dB dB dBm dBm dB dBm dBm dB dB dB dB Unit Value Quantity Line Totals 52 40 35 42 00 126 74 94 34 06 0 05 01