Agilent Technologies 6002A Guia do Utilizador descarregar pdf (Página 230)

D Single-Mode/Multimode Module Performance Tests Te s t I I. E v e nt De a d z o ne

230 E6000C Mini-OTDR User’s Guide, E0302

Note more results 18 Note 2-pt-loss between A and B as “Dynamic Range

98%

”

at the actual pulsewidth.

19 Calculate the dynamic range as follows:

Dynamic Range = Dynamic Range

98%

+ 1.9 dB

Repeat for other pulsewidths 20 Repeat steps 4 to 19 with all pulsewidths described in

the test record.

Test II. Event Deadzone

NOTE The setup simulates a return loss of 35 dB. To care for the

fact that – due to the coupler – the light pulse travels

through the attenuator twice to sum up, the attenuator

needs to be set to a value 3 dB larger than the simulated

return loss, that is. 35 dB + 3 dB = 38 dB.

As this value includes the Insertion Loss of the

attenuator, you may need to determine the Insertion Loss

first.

Connect equipment 1 Make sure that all optical connectors are clean and

connect the equipment as shown in Figure 78.

If you are using the Agilent Recirculating Delay Line,

connect port 2 to the OTDR, port 1 to the input of the

attenuator, and port 3 to the output of the attenuator

Be sure to use the appropriate Single-Mode/Multimode

delay line for the module to be tested.

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Agilent Technologies 6002A Guia do Utilizador Página 230