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Pluggable Pre-Amplifier (PRE)

 

The Pluggable Pre-Amplifier (PRE) module is a CFP2-format EDFA pluggable pre-amplifier module that plugs into the PRE slot of a host ROADM or ILA module. It provides supplementary unidirectional amplification of C-band signals when enabled. The PRE module connects to the PRE port of the host module through an external fiber pair. The signal is sent from the PRE port of the host module to the PRE module for pre-amplification. The pre-amplified signal is then sent back to the PRE port of the host module for regular processing.

The PRE module is enabled and disabled by operator command. See the BTI7800 Series Software Configuration Guide for details.

PRE Specifications

Table 1: PRE (BT8A78AMPP) Specifications

Parameters

Range

Physical

 

Width

41.5mm

Height

12.4mm

Depth

107.5mm

Weight

 

Environmental

 

Temperature and Humidity

See Site Requirements.

Power Consumption

2 W

Optical

Minimum

Typical

Maximum

Composite Input Signal Power

-37.5dBm

 

0dBm

Composite Output Signal Power

-21.5dBm

 

15dBm

Fiber Type

SMF-28 or equivalent

Connector

LC/UPC

LEDs

There are no LEDs on the PRE module itself.

The following is the behavior for the LEDs beneath the PRE slot on the host module:

  • Active (Green) - ON if the PRE module is provisioned and enabled (regardless of whether the module is present); OFF if the PRE module is disabled.

  • Fault (Amber) - ON if the PRE module is enabled and a fault exists; OFF if the PRE module is disabled or if no fault exists.

  • Fail (Red) - ON if the PRE module is provisioned but not present in the slot; OFF if the PRE module is not provisioned or if present in the slot.

Installing a PRE

Use this procedure to install the PRE module into a host ROADM or ILA module.

The PRE module fits into the PRE slot on the host module. An external fiber pair connects the PRE module to the PRE port of the host module. This short fiber is supplied together with the PRE module.

The PRE module is enabled and disabled by operator command. For details, see the BTI7800 Series Software Configuration Guide.

Note

Be familiar with the site, safety, and installation guidelines described in Module Installation and Removal Guidelines.

  1. If required, remove the PRE filler panel from the PRE slot on the host ILA or ROADM module.
  2. Remove the PRE from its antistatic packaging and visually inspect the module before installation.
  3. Install the PRE module into the PRE slot.

  4. Connect the supplied fiber from the PRE module to the PRE port on the host ROADM or ILA module.

    Ensure the bend radius is not exceeded on the fiber.

    Caution

    When working with ROADM, ILA, or PRE modules, follow the safety procedures associated with equipment containing Laser Safety Hazard Level 1M. The ROADM, ILA, and PRE modules support Automatic Power Reduction (APR) on the PRE port.

You have successfully completed this procedure.

Removing a PRE

Use this procedure to remove a PRE module from the host ROADM or ILA module.

This procedure affects traffic only if the PRE module is in the optical path. This procedure does not affect traffic if the PRE module is not in the optical path. If the PRE module is in the optical path, you should disable the PRE module before removing it. See the BTI7800 Series Software Configuration Guide for details.

Tools Required

  • Antistatic bag

Note

Be familiar with the site, safety, and installation guidelines described in Module Installation and Removal Guidelines.

  1. Disconnect the fiber from the PRE module and from the PRE port on the host ROADM or ILA module. Caution

    When working with ROADM, ILA, or PRE modules, follow the safety procedures associated with equipment containing Laser Safety Hazard Level 1M. The ROADM, ILA, and PRE modules support Automatic Power Reduction (APR) on the PRE port.

  2. Remove the PRE module.
  3. Place the PRE module into an antistatic bag.
  4. Install a filler panel into the empty slot.

You have successfully completed this procedure.