....................................................................................................................................................................................................................................

Ordering

Selection procedure

5 - 4 2

See Appendix B, "LC Attenuators" (B-12).

This section covers the selection of LC attenuators to be used on

the input to the long reach 2.5G/10G based on the received

optical power. It is recommended that the LC attenuator be

placed on the INPUT port since this is the furthest physical point

on the fibre line from the OUTPUT port and takes all connector

losses into account. Perform the steps as described below to

choose and install the appropriate LC attenuator for all port units:

............................................................................................................................................................

At the input of the receiver measure the received optical power from

the far-end transmitter. Be sure to set the optical power meter for the

wavelength of the light to be measured (i.e. 1310 nm or 1550 nm).

..........................................................................................................................................................

Check that the measured value is within the range shown below "LC

attenuator value range" (5-43)).

IF...

the measured value is

within the range,

the measured value is not

within the range,

............................................................................................................................................................

Remove the 0-dB LC attenuator in the faceplate IN port of the optical

circuit pack.

............................................................................................................................................................

Install the chosen LC attenuator.

............................................................................................................................................................

Measure the received optical power again.

Result:

The measured value must be within the valid range.

N D

O F

T E P S

............................................................................................................................................................

Lucent Technologies

THEN...

END OF STEPS

choose the appropriate LC attenuator

value.

Commissioning

365-374-059

Issue a, January 2002

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