Common use of Test Steps Clause in Contracts

Test Steps. ‌ Figure 6-36 Receiver sensitivity test a Connect the test system according to Figure 6-36. ▇▇▇▇ based on the characteristics of the optical module. Use the test pattern defined in Table 6-2. c When for a multi-lane optical module, ensure that each optical lane is tested individually by connecting to an external wavelength demultiplexer and all other lanes are in operation using the same test pattern. d Measure the optical power values of the two output ports of the splitter to P1 and P2 defined in Figure 6-36, and determine the optical power compensation value using the following equation: ΔP = P2 – P1. Then the receive optical power(P2) of the DUT can be calculated as P2=P1+ΔP. e Adjust the optical attenuator to 0 dB and wait for a time interval. After confirming the phase lock of the ▇▇▇▇, wait until the BER is stable. Then record the BER after 3 seconds. Note: Calculate the time interval of error bits accumulation when the is BER tested based on confidence (95%), BER (2.4E-4), and the following equation: Equation 6-16: CL = 1 − e−Nbits×BER Where: CL: confidence Nbits: bits accumulation that the pattern generator sends in the time interval. BER: bit error ratio. The time interval of error bits accumulation is 2.35E-7s when CL is 95% and the BER is 2.4E-4. The test duration is 3 seconds. f Adjust the attenuation value of the VOA until the measured BER is around BER 1E-6. Note: The step of adjusting the attenuation value is advised to be set at 0.5dB. g Adjust the attenuation value of the VOA until the measured BER rests stably 2.4E-4. Note: The step of adjusting the attenuation value is advised to be set at 0.1dB. h The above receive optical power and the corresponding BER are drawn as a BER curve, according to which the received optical power corresponding to the target BER is obtained, namely, the ‘receiver sensitivity’. i When for a multi-lane optical module, repeat the test for other lanes. Note: The SECQ of the Reference transmitter's optical eye is 0.9 dB (an ideal input signal without overshoot). The test signal should have negligible impairments such as inter-symbol interference (ISI), rise/fall times, jitter and RIN.

Test Steps. ‌ Figure 6-36 37 Receiver sensitivity with fiber propagation test a Connect the test system according to Figure 6-3637. ▇▇▇▇ based on the characteristics of the optical module. Use the test pattern defined in Table 6-2. c When for a multi-lane optical module, ensure that each optical lane is tested individually by connecting to an external wavelength demultiplexer and all other lanes are in operation using the same test pattern. d Measure the optical power values of the two output ports of the splitter to P1 and P2 defined in Figure 6-3637, and determine the optical power compensation value using the following equation: ΔP = P2 – P1. Then the receive optical power(P2) of the DUT can be calculated as P2=P1+ΔP. e Adjust the optical attenuator to 0 dB and wait for a time interval12 seconds. After confirming the phase lock of the ▇▇▇▇, wait until the BER is stable. Then record the BER after 3 seconds. Note: Calculate the time interval of error bits accumulation when the is BER tested based on confidence (95%), BER (2.4E-4), and the following equation: Equation 6-16: CL = 1 − e−Nbits×BER Where: CL: confidence Nbits: bits accumulation that the pattern generator sends in the time interval. BER: bit error ratio. The time interval of error bits accumulation is 2.35E-7s when CL is 95% and the BER is 2.4E-4. The test duration is 3 12 seconds. f Adjust the attenuation value of the VOA until the measured BER is around BER 1E-6. Note: The step of adjusting the attenuation value is advised to be set at 0.5dB. g Adjust the attenuation value of the VOA until the measured BER rests stably 2.4E-4. Note: The step of adjusting the attenuation value is advised to be set at 0.1dB. h The above receive optical power and the corresponding BER are drawn as a BER curve, according to which the received receive optical power corresponding to the target BER is obtained, namely, the ‘receiver sensitivitysensitivity with fiber propagation’. i When for a multi-lane optical module, repeat the test for other lanes. 1 Refer to the notes of the receiver sensitivity test defined in 6.35. 2 The 0.47 dB/km at 1264.5 nm attenuation for optical fiber cables is derived from Appendix I of ITU-T G.695. Note: 3 The 0.5 dB/km attenuation is provided for the outside plant cable as defined in ANSI/TIA 568-C.3. 4 The SECQ of the Reference reference transmitter's optical eye is 0.9 dB (an ideal input signal without overshoot). The test signal should have negligible impairments such as inter-symbol intersymbol interference (ISI), rise/fall times, jitter and RIN.