Cisco GS7000 User manual

Model GS7000 GainMaker Node

Forward Local Injection Module

Installation Instructions

Introduction

The Forward Local Injection (FLI) Module is a field installable accessory for the

Model GS7000 GainMaker®Scaleable 4-Port Node.

The FLI Module routes an RF signal from an external source to the Forward

Configuration Module (FCM) in the node through the Optical Interface Board

(OIB). This signal is then coupled with other inputs from one or more optical

receivers.

Note: The FLI Module Field Upgrade Kit, part number 4013575, contains the

parts necessary to add forward local injection functionality to your Model GS7000

Node.

2 4019330 Rev C

Product Description

Overview

The FLI Module acts as the interface between an external RF source and the Model

GS7000 Node.

The RF signal enters the Model GS7000 Node though port F2 in the node housing

lid. An RF cable assembly is provided to route the signal from port F2 to the input

connector on the FLI Module. (Port F1 entry is optional, but requires a shorter RF

cable.) The FLI Module accepts the RF signal through a female F-type push-on

connector on the top cover of the module housing and routes the signal to the OIB

through a signal pin.

The FLI Module is designed to be mounted in the "RCVR 4" position on the OIB in

the node.

An RF test point on the module provides a sample of the RF signal at -20 dB for level

monitoring.

Note: A special "Local Injection" version of the 1x2 Redundant FCM must be

installed in the node to facilitate the operation of the FLI Module.

Technical Specifications

The FLI Module meets the following technical specifications.

Forward Injection Port

Performance

Units 7.5 dB I/S EQ with

1.5 dB I/S Pad

Notes

Operational Gain (minimum) dB 19.5 1

Frequency Response dB ±0.5

Internal Tilt (±1 dB) dB 14.5 2

Input Return Loss dB 16 3

Notes:

1Forward operational gain is for station from forward injection port to node RF

output port with 0 dB pad in OIB, 1x2 Redundant Injection FCM, 1.5 dB

interstage (I/S) pad, 7.5 dB linear I/S EQ, factory select output pad. Includes

OIB losses; ~ 2.25 dB loss through the FLI Module and RF cable, and ~ 15 dB loss

through the FCM.

2Internal tilt is "Linear" tilt and is primarily due to an on-board fixed equalizer

and a factory configured 7.5 dB linear I/S EQ.

3Input Return Loss specified for Forward Injection port.

4019330 Rev C 3

Product Description

Node Overview Illustration

The following illustration shows the location of the FLI Module and associated

components as installed in the node.

4 4019330 Rev C

FLI Module Installation

Required Components

The following components are required to implement Forward Local Injection in the

Model GS7000 Node.

Note: These parts (except for item number 5 pads) are included in the FLI Module

Field Upgrade Kit.

1Forward Local Injection Module.

2FLI Module RF Cable Assembly.

4019330 Rev C 5

FLI Module Installation

3Local Injection version of the 1x2 Redundant Forward Configuration Module.

4F-type bulkhead RF connector assembly for port F2 (or optional port F1) on node

housing lid.

5Two 1.5 dB pads for the FWD I/S pads on the GS7000 Node RF amplifier

assembly.

Note: Pads are not included in upgrade kit. Obtain those from your normal on-

hand node accessories.

Installing theFLI Module

Note: This example uses port F2 for the external RF source. This should represent

the majority of installations, since port F1 is most commonly used as the input port

for the optical fibers.

Important: For complete information on opening/closing the node and working on

components inside the node, refer to Model GS7000 GainMaker Scaleable 4-Port Node

Installation and Operation Guide, part number 4013584.

Complete the following steps to install the FLI Module in the node.

1Open the node housing.

2Place the FLI Module in the RCVR 4 position on the OIB in the node housing lid

and insert the module until it is connected to the OIB.

Note: If an existing receiver module is in the RCVR 4 position, it must be moved

to a different RCVR position. Refer to Receiver/Transmitter Module Removal

and Replacement.

3Tighten the module retaining screws to secure the module in the node. Torque

the screws from 25 to 30 in-lbs (2.8 to 3.4 Nm).

6 4019330 Rev C

FLI Module Installation

4Insert the threaded F-type connector on one end of the RF cable assembly

through port F2 and outside the node housing and connect it to the bulkhead RF

connector as shown in the following illustration.

5Thread the bulkhead RF connector assembly into port F2 on the node housing lid

as shown in the following illustration. Torque the connector from 3 to 4 ft-lbs

(4.1 to 5.4 Nm).

6Route the RF cable to the left through the fiber channel in the node and toward

the FLI Module.

4019330 Rev C 7

FLI Module Installation

CAUTION:

Be careful not to damage any existing transmitter or receiver fibers or fiber

connectors when routing the RF cable.

Note: The following illustration shows the installation with optical receivers and

transmitters removed to provide a better view of the RF interface cable routing in

the fiber channel.

7Insert the right-angled G-type connector of the RF cable assembly into the Input

connector on the FLI Module as shown in the previous illustration.

8Install the Local Injection version of the 1x2 Redundant FCM into the RF

amplifier assembly in the node housing base.

Note: To remove the existing FCM, pull up carefully on its integrated handle

until it separates from the RF amplifier assembly.

9Replace the two existing FWD I/S pads (located directly above the FCM on the

RF amplifier assembly) with 1.5 dB pads.

10 Close the node housing. Refer to Closing the Housing for complete instructions.

11 Connect the external RF source to port F2 on the node housing lid.

8 4019330 Rev C

FLI Module Installation

Closing the Housing

Close the housing as follows.

1Ensure any worn gaskets are replaced, and the gaskets are clean and in the

correct position.

2Carefully close the lid.

CAUTION:

Use caution when closing housing. Improper closing may result in the Model

GS7000 Node not being sealed from the environment.

3For strand-mounted housings, pull the lid away from the base and remove the

slack from the hinge before rotating the lid up toward the base.

4Ensure no cables are pinched between lid and base.

5Secure lid to base with bolts. Tighten from 5 to 12 ft-lbs (6.8 to 16.3 Nm) in the

sequence shown in the following illustration. Repeat the sequence twice, ending

with the final torque specification.

Receiver/Transmitter Module Removal and Replacement

Depending on the module population of your particular node, it may be necessary to

relocate or remove and replace an optical receiver or transmitter to facilitate the

installation of the FLI Module.

If necessary, complete the following steps to remove and replace an optical receiver

or optical transmitter.

1Open the node housing.

2Carefully tag and remove any optical fibers from the receiver or transmitter

module.

4019330 Rev C 9

FLI Module Installation

WARNING:

Laser light hazard. Never look into the end of an optical fiber or connector.

Failure to observe this warning can result in eye damage or blindness.

3Loosen the screws securing the module.

4Lift the module straight up out of the housing to unplug it.

Note: Pull up on the built-in handle.

5To install a module, position it in the desired location and carefully slide the

module into its slot until connected to the optical interface board.

6Tighten the screws securing the module. Torque screws from 25 to 30 in-lbs (2.8

to 3.4 Nm).

7Carefully reconnect any optical fibers that were removed from the original

module.

Important: Clean optical connectors before reconnecting. Follow recommended

fiber optic cleaning procedures.

WARNING:

Laser light hazard. Never look into the end of an optical fiber or connector.

Failure to observe this warning can result in eye damage or blindness.

8Close the node housing. Refer to Closing the Housing for complete instructions.

10 4019330 Rev C

For Information

IfYou Have Questions

If you have technical questions, call Cisco Services for assistance. Follow the menu

options to speak with a service engineer.

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