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Installing EMI Gaskets and RF Absorber Material on the Cisco uBR10012 Universal Broadband Router

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Table Of Contents

Installing EMI Gaskets and RF Absorber Material on the Cisco uBR10012 Universal Broadband Router

Contents

Introduction

Before You Begin

Preparing the Chassis

Installing the EMI Gaskets

Installing the RF Absorber Material

Installing the PRE2 Modules

Part Numbers

Related Documentation

Obtaining Documentation

Cisco.com

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco Technical Support Website

Submitting a Service Request

Definitions of Service Request Severity

Obtaining Additional Publications and Information


Installing EMI Gaskets and RF Absorber Material on the Cisco uBR10012 Universal Broadband Router

Part Number: UBR10-PRE2-EMI, UBR10-PRE2-EMI=

The following information is provided to help you install EMI gaskets and RF absorber material on the Cisco uBR10012 universal broadband router before you install the PRE2 modules.

Note EMI gaskets and RF absorber material are only required if you are replacing PRE1 modules with PRE2 modules in a Cisco uBR10012 universal broadband router.

Caution The EMI gaskets and RF absorber material are not required for Cisco ESR10000 routers. Do not install these gaskets or the RF absorber material in a Cisco ESR10000 chassis.

Contents

•Introduction

•Before You Begin

•Preparing the Chassis

•Installing the EMI Gaskets

•Installing the RF Absorber Material

•Part Numbers

•Related Documentation

•Obtaining Documentation

•Documentation Feedback

•Obtaining Technical Assistance

•Obtaining Additional Publications and Information

Introduction

Upgrading to a Cisco ESR-PRE2 (PRE2) in the Cisco uBR10012 router results in unacceptable Cisco manufacturing EMI emission margins. By installing EMI gaskets and RF absorber material in the locations specified, an acceptable margin is met.

Note This condition is not harmful to the PRE2 or the Cisco uBR10012 router.

Figure 1 Locations of EMI Gaskets and RF Absorber Material

1

EMI gaskets (4)

2

RF absorber material


Before You Begin

Verify that you need this upgrade. Check the locations in Figure 1 for installed EMI gaskets and RF absorber material. If you already have the EMI gaskets and RF absorber material installed, you do not need to continue with this procedure and you can continue with the installation of the Cisco ESR-PRE2 modules.

Preparing the Chassis

Have the following equipment available:

•ESD-preventive wrist strap, antistatic bags, and an antistatic surface

•EMI gaskets and RF absorber material kit

•PRE2 modules to replace the PRE1 modules

•Lint-free wipes

To prepare the chassis for installation of the EMI gaskets and RF absorber material, do the following:

Step 1 Make sure you are properly grounded.

Step 2 Power down the router.

Step 3 Remove the PRE1 modules from the chassis and place them on an antistatic surface.

a. Loosen the captive screws and pivot the ejector levers away from the modules.

b. Slide the PRE1 modules out of the chassis and place them in antistatic bags.

Installing the EMI Gaskets

The EMI gaskets are installed on the chassis on either side of the fan module. See Figure 2. This procedure should take 2 to 3 minutes.

Figure 2 Installation Location of the EMI Gaskets

1

EMI gaskets (4)

   

To install the EMI gaskets, perform the following steps:

Step 1 Loosen the captive screws on the fan module and pull the fan module out of the chassis far enough so that you can install the EMI gaskets. You do not need to remove the fan module from the chassis.

Step 2 With a clean wipe, wipe off the left and right flanges where the four EMI gaskets will be installed.

Step 3 Peel the backing off the gasket (only prepare one gasket at a time).

Step 4 Align the sticky side of the gasket with the flange so that the end of the gasket is level with the top of the flange, see Figure 3.

Figure 3 Aligning the EMI Gasket

1

Top of flange

2

Bottom of flange


Step 5 Carefully place the EMI gasket on the flange and press down to secure the gasket in place.

Caution Do not let the let the gasket slip to either side of the flange. Maintain a distance of at least one-half inch around the captive screw hole in the flange. See Figure 3.

Step 6 Peel the backing off the bottom EMI gasket and align the end of the gasket with the bottom of the flange. See Figure 3.

Step 7 Carefully place the gasket on the flange and press down to secure the gasket in place.

Step 8 Repeat Step 3 through Step 7 for the other side of the chassis.

Figure 4 Installed EMI Gaskets

1

Captive screws

   

Step 9 Push the fan module back into the chassis and use the captive screws to secure the fan module in place. Note that the EMI gaskets are compressed when securing the fan to the chassis. See Figure 4

Installing the RF Absorber Material

RF absorber material is required when you are installing PRE2 modules in your Cisco uBR100012 router. The absorber material is placed on the inside panel of PRE slot B. This procedure should take 4 to 5 minutes.

To install the RF absorber material, use the following procedure:

Step 1 Make sure you are properly grounded.

Step 2 Remove both PRE1 modules from the chassis, if you have not already done so.

Step 3 Using a clean lint-free wipe, wipe the inside panel of the PRE module slot B (panel next to the power supplies). Make sure that the edge of the lip and the edge along the raised channel are free of any dust or debris. See Figure 5.

Caution If the RF absorber material is bubbled or marred by debris left on the surface of the panel or on the lip at the bottom, the PRE2 module may catch on the RF absorber material and not fit properly into the slot.

Figure 5 Aligning the RF Absorber Material with the Raised Channel and Lip

1

RF absorber material

3

Raised channel

2

Align the RF absorber material here

4

Lip


Step 4 Peel the backing from the 2.7 x14.2 inch sheet of RF absorber material. Be very careful not to let any two adhesive covered sections of the material stick together, it is very difficult to unstick.

Step 5 Carefully align the material in the area shown in Figure 5. When you are aligning the material, align it with both the edge of the raised channel and the edge of the lip.

Caution Take special care to properly align this material before securing it in place, the material is difficult to remove once it is securely in place.
Do not allow the RF absorber material to over lap the raised channel or the lip as it can interfere with the PRE2 installation.

Step 6 Lightly press the RF absorber material into place along the raised channel, making sure that there are no bubbles or wrinkles in the material.

Note You can lift the RF absorber material from the panel to reposition it, but each time you do, the adhesive backing loses some of its integrity.

Figure 6 Aligning the RF Absorber Material

1

Raised channel

3

Aligned RF absorber material

2

Lip

   

Step 7 When the material is properly aligned and laying flat against the surface of the panel, gently press down on the material, starting from the side nearest the raised channel and moving toward the back of the chassis.

Make sure that you don't cause the material to slip out of place and check for any wrinkles or bubbles. Reset the RF absorber material, if necessary.

Installing the PRE2 Modules

After the installation of the RF absorber material is complete, install the PRE2 modules in the chassis. Refer to Performance Routing Engine Module for the Cisco uBR10012 Universal Broadband Router at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/cable/ubr10k/ubr10012/frus/ub10pre.htm

Part Numbers

Table 1 Part Numbers

Description
Part Number

PRE2 module

ESR-PRE2, ESR-PRE2/R

UBR-PRE2-EMI uBR10012 chassis EMI emission kit for use with the PRE2

UBR10-PRE2-EMI, UBR10-PRE2-EMI=

The kit includes:

4-EMI gaskets, 0.25 x 2 in. (6.35 x 50.80 mm)
1-RF absorber material, 2.7 x 14.2 in. (68.55 x 360.68 mm)
Installation documentation


Related Documentation

•Performance Routing Engine Module for the Cisco uBR10012 Universal Broadband Router at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/cable/ubr10k/ubr10012/frus/ub10pre.htm

•Cisco uBR10012 Universal Broadband Router Hardware Installation Guide at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/cable/ubr10k/ubr10012/hig/index.htm

Obtaining Documentation

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Cisco.com

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We appreciate your comments.

Obtaining Technical Assistance

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Submitting a Service Request

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Definitions of Service Request Severity

To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.

Severity 1 (S1)—Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

Obtaining Additional Publications and Information

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•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies learn how they can use technology to increase revenue, streamline their business, and expand services. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions. You can access iQ Magazine at this URL:

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This document is to be used in conjunction with the documents listed in the "Related Documentation" section.

Copyright © 2004 Cisco Systems, Inc. All rights reserved.