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Cisco UBR-MC20X20V Cable Interface Line Card Hardware Installation Guide

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Cisco UBR-MC20X20V Cable Interface Line Card Hardware Installation Guide

Table Of Contents

Cisco UBR-MC20X20V Cable Interface
Line Card Hardware Installation Guide

Document Revision History

Contents

Feature Overview

Benefits

Onboard Failure Logging

Logging details for OBFL

Storing OBFL Data

Displaying OBFL Data

Software Licensing

Cisco UBR-MC20X20V Cable Interface Line Card Physical Description

Tools and Equipment

Technical Specifications and Component Part Numbers

Physical Specifications and Compliance Information

RF Specifications

Input

Output

RF Output Power Range

Noise

RF Specifications Specific to Cisco UBR-MC20X20V Cable Interface Line Card

Part Numbers

Nominal Attenuation

Safety Information and Warnings

Electrical Equipment Guidelines

Preventing Electrostatic Discharge Damage

Warning Definition

Installing or Replacing a Cisco UBR-MC20X20V Cable Interface Line Card

Tools and Equipment

Unpacking the Cisco UBR-MC20X20V Cable Interface Line Card

Removing UCH2 from the Cisco UBR-MC20X20V Cable Interface Line Card

Removing the Cisco UBR-MC20X20V Cable Interface Line Card from the Card Slot

Installing the Cisco UBR-MC20X20V Cable Interface Line Card in the Card Slot

Installing UCH2 on the Cisco UBR-MC20X20V Cable Interface Line Card

Installing or Replacing Cables in UCH2

Tools and Equipment

Removing Cables

Installing Cables

Adding Heat-Shrink Tubing to Custom Built Cables

Tools and Equipment

Adding Heat-Shrink Tubing

Troubleshooting the Cisco UBR-MC20X20V Cable Interface Line Card Installation

Downstream RF Power Measurement Caution

Broken Leadscrews

Related Documentation


Cisco UBR-MC20X20V Cable Interface
Line Card Hardware Installation Guide


First Published: November 9, 2009

Last Updated: May 10, 2010

Document Revision History

Document Revision
Date
Change Summary

OL-20254-01

November 16, 2009

Initial Version.

OL-20254-02

May 10, 2010

Added information about the 10 and 15 downstream channel license information.



Tip Statement numbers (for example, Statement 1030) at the end of a Warning refer to specific warnings and their translations in the Regulatory Compliance and Safety Information for the Cisco uBR10012 Universal Broadband Router document.


Contents

Feature Overview

Cisco UBR-MC20X20V Cable Interface Line Card Physical Description

Tools and Equipment

Technical Specifications and Component Part Numbers

Safety Information and Warnings

Installing or Replacing a Cisco UBR-MC20X20V Cable Interface Line Card

Installing or Replacing Cables in UCH2

Adding Heat-Shrink Tubing to Custom Built Cables

Troubleshooting the Cisco UBR-MC20X20V Cable Interface Line Card Installation

Related Documentation

Feature Overview

The Cisco UBR-MC20X20V cable interface line card is a 20 by 16 inch card designed specifically for the Cisco uBR10012 universal broadband router. This card transmits and receives RF signals between the subscriber and the headend over hybrid fiber-coaxial (HFC) system.

The Cisco UBR-MC20X20V line cards have five downstream (DS) ports and twenty upstream (US) ports. The line card supports five cable MAC domains (cable interfaces), and the 20 DS and 20 US channels are dynamically associated with any of these five MAC domains. The card has twenty US spigots and five DS spigots. Each of the US spigots supports either two-frequency stacked US channels across ten ports or a single US channel across twenty ports. Each of the DS spigots supports four-frequency stacked channels across five ports.

Upstream data, from the subscriber, comes through the upstream ports (US0-US19) on the Cisco UBR-MC20X20V cable interface line card. The line card processes and configures the data and sends it across the backplane to the WAN/backhaul card and out to the Internet.

Downstream data, to the subscriber, comes from the Internet through the WAN/backhaul card, and across the backplane to the Cisco UBR-MC20X20V cable interface line card. The Cisco UBR-MC20X20V card processes and configures the data and sends it out through the appropriate rf-channel on a downstream port (DS0-DS4) to be combined with the rest of the downstream signals in the headend.

The Cisco UBR-MC20X20V cable interface line card supports both DOCSIS and EuroDOCSIS cable modem networks. The card supports downstream channels in the 55 to 999 MHz range, and upstream channels in the 5 to 65 MHz range. The Cisco UBR-MC20X20V cable interface line card supports Annex A and Annex B radio frequency (RF) data rates, channel widths, and modulation schemes and has DOCSIS MAC management and spectrum management capabilities. DOCSIS-3.0, A-TDMA, S-CDMA, downstream bonding, and upstream bonding rates are supported.

The Cisco UBR-MC20X20V cable interface line card has high line card CPU speed, memory, and flash memory allowing support of Voice over IP (VoIP) at much higher call loads and a higher percentage of modems running advanced DOCSIS features that typically consume line card CPU resources.


Note You must ensure that two DOCSIS Timing, Communication and Control (DTCC) cards are configured on the Cisco uBR10012 router before installing the Cisco UBR-MC20X20V cable interface line card.


Figure 1 shows the Cisco UBR-MC20X20V cable interface line card faceplate with Configured as UBR-MC20X20V-20D bar code label printed on it to indicate that the software license installed on the card supports 20 DS channels. The product ID (PID) of this card is UBR-MC20X20V-20D.

Figure 1 Cisco UBR-MC20X20V-20D Cable Interface Line Card

Figure 2 shows the Cisco UBR-MC20X20V cable interface line card faceplate with Configured as UBR-MC20X20V-5D bar code label printed on it to indicate that the software license installed on the card supports five DS channels. The PID of this card is UBR-MC20X20V-5D.

Figure 2 Cisco UBR-MC20X20V-5D Cable Interface Line Card

Figure 3 shows the Cisco UBR-MC20X20V cable interface line card faceplate with Configured as UBR-MC20X20V-0D bar code label printed on it to indicate that the software license installed on the card does not support DS channels. The PID of this card is UBR-MC20X20V-0D.

Figure 3 Cisco UBR-MC20X20V-0D Cable Interface Line Card

Table 1 shows the supported DOCSIS modulation schemes.

Table 1 Supported DOCSIS and EuroDOCSIS Modulation Schemes

Cable Interface Line Card
Downstream Modulation
Upstream Modulation

Cisco UBR-MC20X20V

64-QAM1 , 256-QAM

QPSK2 , 8-, 16-, 32-, 64-QAM

1 QAM = Quadrature Amplitude Modulation

2 QPSK = Quadrature Phase Shift Keying


Benefits

The Cisco UBR-MC20X20V cable interface line card provides the following benefits:

Expanded capacity of the Cisco uBR10012 universal broadband router, providing the highest port density available in Cisco cable interface line cards.

Additional flexibility for cable operators in partitioning the cable plant to address growing subscriber bandwidth demands; enables cost-effective scalability of services and subscribers.

Online insertion and removal (OIR), allowing key system components to be added or removed without powering off the chassis.

Hardware-based support for DOCSIS 2.0 (apart from DOCSIS 1.x features) and DOCSIS 3.0 features such as S-CDMA, Multiple Logical Channels, Upstream Channel Bonding, Per Service flow DS ID, and other DOCSIS 3.0 downstream features.

Onboard Failure Logging

The On-Board Failure Logging (OBFL) feature enables storage and collection of critical failure information in the nonvolatile memory of a Field Replaceable Unit (FRU), like a Route Processor (RP) or line card. The Cisco uBR10000 series universal broadband router supports OBFL on PRE4, the Cisco SIP-600 jacket card, Cisco UBR-MC20X20V cable interface line card and the Cisco UBR-MC5X20H cable interface line card.

The OBFL stored data assists in understanding and debugging field failures upon Return Material Authorization (RMA) of a RP or line card at repair and failure analysis sites.

OBFL records operating temperatures, voltages, hardware uptime, and any other important events that assist board diagnosis in case of hardware failures.

For more information on the feature, see the Onboard Failure Logging feature guide located at the following URL:

http://www.cisco.com/en/US/docs/ios/12_2sx/12_2sxh/feature/guide/sxhobfl.html#wp1053048


Note The output from the CMTS router may vary slightly compared to the output samples shown in the URL mentioned above.


Logging details for OBFL

The logging details for the OBFL feature are described below:

OBFL is enabled by default. You need to enable the feature if it is disabled previously.

On the Cisco UBR-MC20X20V cable interface line card logging begins after the system starts up.

OBFL samples the Cisco UBR-MC20X20V cable interface line card temperature and voltage sensors every five minutes.

Voltage data is stored only when it is different from the last stored record.

The maximum logging time is two hours, hence, a new record is stored every two hours, regardless of data variation.

Fatal hardware events are logged with OBFL.

Logs are organized as current (continuous) and historical (summarized) data records.

OBFL logging has no impact on performance.

Storing OBFL Data

OBFL logs are recorded on the bootflash device of the Cisco UBR-MC20X20V cable interface line card. The logs are maintained in a separate 2MB partition, distinct from the Bootflash filesystem partition where the crash dumps are stored. OBFL log files are not accessible to the operator and their contents can be viewed only by using the OBFL CLI commands.

Displaying OBFL Data

The show logging onboard command displays the logs from the OBFL data.

For information on OBFL commands, see the "Configuration Tasks" chapter in the Onboard Failure Logging feature guide located at the following URL:

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/12sobfl.html#wp1025118

Software Licensing

The Cisco UBR-MC20X20V cable interface line card supports software licensing for the DS functionality. A bar code label on the Cisco UBR-MC20X20V cable interface line card faceplate indicates the type of license configured on it (see Figure 1, Figure 2, and Figure 3).

Table 2 describes the license information. The four license LEDs on the line card faceplate indicate the license status (see Figure 1).

Table 2

License/PID
Label on the Faceplate
License LED
Description

UBR-MC20X20V-20D

Configured as UBR-MC20X20V-20D

LIC1-LIC4 illuminates green.

This card supports 20 DS channels.

UBR-MC20X20V-5D

Configured as UBR-MC20X20V-5D

Only LIC1 illuminates green.

This card supports five DS channels.

UBR-MC20X20V-0D

Configured as UBR-MC20X20V-0D

LIC1-LIC4 do not illuminate (off state).

This card does not support any DS channel. That is, zero DS channel.

UBR-MC20X20V-10D

Configured as UBR-MC20X20V-5D

LIC1-LIC2 illuminates green.

This card supports 10 DS channels.

UBR-MC20X20V-15D

Configured as UBR-MC20X20V-5D

LIC1-LIC3 illuminates green.

This card supports 15 DS channels.


License Information

The four LEDs blink green when the license is either invalid or no license is configured. The LED status is described in Table 3.

Cisco UBR-MC20X20V Cable Interface Line Card Physical Description

Figure 4 shows the Cisco uBR10012 universal broadband router with the Cisco UBR-MC20X20V cable interface line cards installed.

Figure 4 Cisco uBR10012 Router Chassis with Cisco UBR-MC20X20V Cable Interface Line Cards

Table 3 describes the LEDs on the Cisco UBR-MC20X20V dense connector cable interface line card.

Table 3 Cisco UBR-MC20X20V Card LEDs 

LED
Status
Description

POWER

Green

Off

Card is powered on.

Card is not powered on.

STATUS

Green

Blinking Green

Yellow

Off

Processor has booted and passed diagnostics.

Protect mode when the card is the redundant card in the system.

In bootup mode.

No power to the line card.

MAINT

Yellow

Off

It is safe to remove the line card.

No action necessary.

US0 through US19

Green

Off

Upstream-enabled path is configured and able to pass traffic.

Upstream port is not enabled.

DS0 through DS4

Green

Off

RF-enabled downstream path is configured and able to pass traffic out through the upconverter at radio frequencies.

RF is not enabled.

Note If the downstream port/interface is "no shut", this LED will be green even if the RF output is shut or the DS frequency is not set.

LIC1 through LIC4

LIC1-LIC4
Green
Off
Blinking green

LIC1
Green

LIC1-LIC2
Green

LIC1-LIC3
Green


Line card supports 20 DS channels
Line card supports 0 DS channel
Invalid or no license


Line card supports 5 DS channels

Line card supports 10 DS channels

Line card supports 15 DS channels


Tools and Equipment

The dense connector configuration comes with the following equipment:

Universal cable holder (UCH): UCH2

T-10 TORX driver tool

Cable bundle


Note Quad-shield coaxial cable bundles for the Cisco UBR-MC20X20V cable interface line card can be purchased from Cisco, with the Universal Cable Holders (UCH) already connected to the coaxial cable bundles. Alternatively, custom-length quad-shield coaxial cable bundles can be purchased from third party vendors, with the UCH either connected to the cable bundles or provided as separate components.


Figure 5 shows the UCH2, which is used to group, hold, and protect the MCX cables when they are installed on the Cisco UBR-MC20X20V cable interface line card. Always use UCH2 when cabling the Cisco UBR-MC20X20V cable interface line card.

Figure 5 Universal Cable Holder (UCH): UCH2

The T-10 TORX driver tool (see Figure 6) and a 1/4-inch flathead screwdriver are used to remove and install the cable bar clamp on the UCH, and loosen the line card captive screws.

Figure 6 T-10 TORX Driver Tool

The Cisco UBR-MC20X20V cable interface line card uses bundled cables. The cables come in bundles of 5 cables or 10 cables. Figure 10 shows a MC20X20V dual-shielded cable bundle with 10 cables. This particular dual-shielded cable configuration can be used when you are cabling the Cisco UBR-MC20X20V card directly to the cable plant.


Note Only in Europe, the Cisco UBR-MC20X20V cable interface line card must use quad-shielded cables. In all other regions, the Cisco UBR-MC20X20V cable interface line card can use dual-shielded or quad-shielded cables.


Figure 7 shows the cable bundle for Cisco UBR-MC20X20V cable interface line card to hybrid fiber-coaxial (HFC) plant that has 25 F connectors attached to one end and three UCH2 units attached to the other end. This cable is 9.84 feet (3 m) long and the part number is CAB-RFSW520QTIMF2.

Figure 7 Cable Bundle with UCH2 Units and F Connectors

1

F Connector

2

UCH2


Figure 8 shows the cable bundle for Cisco UBR-MC20X20V cable interface line card to RF switch that has three UCH2 units attached to one end and two RF switch header blocks attached to the other end. This cable is 3.2 feet (1 m) long and the part number is CAB-RFSW520QTIMM2.

Figure 8 Cable Bundle with UCH2 Units and RF Switch Header Blocks

1

RF Switch Header Blocks

2

UCH2


Figure 9 shows the cable bundle for RF switch to HFC plant that has two RF switch header blocks attached to one end and 25 F connectors attached to the other end. This cable is 9.84 feet (3 m) long and the part number is CAB-RFSW520QTPMF2.

Figure 9 Cable Bundle with RF Switch Header Blocks and F Connectors

1

F Connectors

2

RF Switch Header Blocks



Note Customers purchasing custom-length quad-shield coaxial cable bundles from third party vendors can purchase spare Universal Cable Holders and spare RF switch header blocks from Cisco. Refer to Table 11 for the applicable Cisco part numbers.


If you are cabling the card to the Cisco uBR 3X10 RF switch, you must have MCX connectors at either end of the cable.

Figure 10 10-Bundle Dual-Shielded Cable with MCX Connectors


Caution The Cisco UBR-MC20X20V cable interface line card must be used with the provided UCH2 for all cable connections to the line card. Failure to use the UCH2 may cause permanent damage to the line card connectors, resulting in low or no RF output in the downstream or low or no RF input in the upstream.


Note The cable used with the dense connector UCH2 must be 75-ohm precision miniature video cable. See the "Technical Specifications and Component Part Numbers" section.


Technical Specifications and Component Part Numbers

The following tables provide specification information for the Cisco UBR-MC20X20V cable interface line card.

Physical Specifications and Compliance Information

Table 4 lists the physical specifications for the Cisco UBR-MC20X20V cable interface line card.

Table 4 Cisco UBR-MC20X20V Cable Interface Line Card Specifications 

Description
Specification

Card dimensions

Width: 1.36 in (3.45 cm)

Height: 20 in. (50.80 cm)

Depth: 16 in. (40.64 cm)

Weight

16 lb (7.26 kg)

Power Consumption

Cisco UBR-MC20X20V

250W1 (853 BTU/hr2 )

Thermal Heat Dissipation

Cisco UBR-MC20X20V

250W (853 BTU/hr)

Mean Time Between Failure (MTBF)

Cisco UBR-MC20X20V

Supports 5 9s availability

Temperature range

Operating: 41 to 104×F (5 to 40×C)

Non-operating: -4 to 149×F (-20 to 65×C)

Relative humidity

Operating: 10 to 90% non-condensing

Non-operating: 5 to 95%

Operating altitude

-197 to 13,123 ft. (-60 to 4000 m)

Standards, Compliance, Protocols

Cisco UBR-MC20X20V

DOCSIS ITU J.112, ITU J.83 Annex A, Annex B
DOCSIS 1.1
DOCSIS MAC management
DOCSIS spectrum management
CableLabs ECR; RFI-R-98036
DOCSIS 2.0
DOCSIS 3.0

Software Requirements

Cisco UBR-MC20X20V

Cisco IOS Release 12.2(33)SCC or later release

1 W = Watts

2 BTU/hr = British thermal units per hour


RF Specifications

Input

Table 5 shows DOCSIS 1.0 input specifications.

Table 5 DOCSIS 1.0 Supported Upstream Modulation Schemes (US0—US19)

Channel Width-MHz
Symbol Rate-Msym/s
Max Throughput-Mbps
Nominal Throughput-Mbps
Maximum Range-dBmV 1
Annex A
Annex B
QPSK
16-QAM
QPSK
16-QAM

0.2

0.16

0.32

0.64

0.23

0.55

-16 to +14

0.4

0.32

0.64

1.28

0.55

1.1

-13 to +17

0.8

0.64

1.28

2.56

1.1

2.2

-10 to +20

1.6

1.28

2.56

5.12

2.2

4.4

-7 to +23

3.2

2.56

5.12

10.24

4.4

8.8

-4 to +26

1 The DOCSIS specifications state that each channel width has a range that it can work within.


Table 6 shows DOCSIS 2.0 input specifications.

Table 6 DOCSIS 2.0 Supported Upstream Modulation Schemes (US0—US19)

Channel Width-MHZ
Symbol Rate-Msym/s
Max Throughput-Mbps
Nominal Throughput-Mbps
Maximum Range-dBmV 1
QPSK
16-QAM
64-QAM
QPSK
16-QAM
64-QAM

6.4

5.12

10.12

20.48

30.72

8.8

17.6

26.4

-1 to +29

1 The DOCSIS specifications state that each channel width has a range that it can work within.


Output

Table 7 shows output specifications.

Table 7 Output Specifications 

Description
Specification

Supported modulation format
Downstream (DS0-DS4)

64-QAM

256-QAM

Normal operating channel bandwidth

DOCSIS: 6 MHz, EuroDOCSIS: 8 MHz

RF output power range

See RF Output Power Range.

Operating frequency range

55-999 MHz, edge-to-edge

US ports frequency range—5-65 MHz

DS ports frequency range—55-999 MHz

Output return loss

14 dB up to 750 MHz, 13 dB above 750 MHz

Worst-case spurious amplitude in the 50-860 MHz range when the upconverter is a maximum power output

-60 dBc at +61 dBmV output

Frequency stability

-5C + 55C: < ± 2ppm

Frequency adjustment resolution

Frequency can be adjusted in 12.5 kHz steps

Amplitude adjustment resolution

Output can be set in 1 dB steps

In-channel frequency response

+/-0.25 dB over operating channel bandwidth

In-channel group delay

50 nanoseconds over operating channel bandwidth

In-channel carrier-to-noise ratio

60 dB over operating channel bandwidth

Out-of-channel carrier-to-noise ratio

70 dB


RF Output Power Range

All the channels within a controller must have the same RF power value. When the rf power value is changed on any one channel, the same value is applied to all the channels within the controller.

The recommended RF power range depends on the mode of the upconverter. The mode of the upconverter is decided by the highest numbered channel that is enabled. Table 8 lists the mode and the corresponding RF power range.

Table 8 RF Output Power Range

Upconverter Mode
Channel Setting
Recommended RF Power Range

Single

Only channel 0 is enabled

60.0 to 52.0 dBmV

Dual

Channel 0 is either enabled or disabled

Channel 1 is enabled

Channel 2 and channel 3 are disabled

56.0 to 48.0 dBmV

Triple

Channel 0 and channel 1 are either enabled or disabled

Channel 2 is enabled

Channel 3 is disabled

54.0 to 46.0 dBmV

Quad

Channels 0, 1, and 2 are either enabled or disabled

Channel 3 is enabled

52.0 to 44.0 dBmV


Noise

Figure 10 shows noise specifications.

Table 9 Noise Specifications

Description
Specification

Integrated phase noise 1 KHz-10 KHz

-36 dBc double side band noise power

Integrated phase noise 10 KHz-50 KHz

-54 dBc double side band noise power

Integrated phase noise 50 KHz-3 MHz

-53 dBc double side band noise power

Spot phase noise at 10 KHz

-91 dBc/Hz single side band noise power

Broadband noise at 61 dBmV output (all channels outside +/-18 MHz)

-12 dBmV/6 MHz, -11 dBmV/8 MHz

Modulated out of channel noise at 6 MHz

-58 dBc minimum +/-3 to 3.75 MHz, -62 dBc minimum +/-3.75 to 9 MHz,
-65 dBc minimum +/-9 to 15 MHz

Modulated out of channel noise at 8 MHz

-58 dBc minimum +/-4 to 5 MHz, -61 dBc minimum +/-5 to 12 MHz,
-64 dBc minimum +/-12 to 20 MHz


RF Specifications Specific to Cisco UBR-MC20X20V Cable Interface Line Card

The following specifications are specific to the Cisco UBR-MC20X20V cable interface line card with onboard upconverters.

Table 10 RF Specifications

Description
Specification

Group delay

15 nsec p-p max over any 5 MHz and +/- 18 nsec over any 7 MHz

Frequency step size

12.5 KHz

Amplitude flatness

+/-0.25 dB over any 5 MHz, < ± 0.35 dB over any 7 MHz

Frequency accuracy

+ 23C:<+/-2ppm

Absolute error from command output level

+/- 2.0 dB


Part Numbers

Table 11 lists the part numbers for the Cisco UBR-MC20X20V cable interface line card, cable kits, cables, connectors, tubing, and tools.

Table 11 Part Numbers 

Description
Part Numbers

1. Cisco UBR-MC20X20V

2. Blank Cover

1. UBR-MC20X20V-20D=, UBR-MC20X20V-5D=, UBR-MC20X20V-0D=

2. UBR10-MC-COVER=

Cable kit (3m MCX to F cables) 1

Dual-shielded

Quad-shielded

CAB-RFSW520TPMF=, Cisco Systems, Inc.

CAB-RFSW520QTPMF=, Cisco Systems, Inc.

Universal Cable Holder (UCH)

1. UCH2

2. Universal Cable Holder for MCX connectors, qty 3 pcs

1. CAB-520-UCH2, Cisco Systems

2. CAB-520-MULT-UCH2

1. Cable bundle for RF card to HFC plant: 3 UCH2 units attached to one end and F connectors attached to the other end, 9.84 feet (3 m) long.

2. Cable bundle for RF card to RF switch: 3 UCH2 units attached to one end and 2 RF switch header blocks attached to the other end, 3.2 feet (1 m) long.

3. Cable bundle for RF switch to HFC plant: 2 RF switch header blocks attached to one end and F connectors attached to the other end, 9.84 feet (3 m) long.

1. CAB-RFSW520QTIMF2=

2. CAB-RFSW520QTIMM2=

3. CAB-RFSW520QTPMF2=

RF Switch header blocks for MCX connectors, qty 4 pcs

CAB-RFSW-MULT-HB

MCX fixed pin connector 1

1. Dual-shielded

2. Quad-shielded

1. PN-MCXFP, White Sands Engineering2

2. PN-MCXFPQ, White Sands Engineering2

75-ohm precision miniature video cable

1. Dual-shielded single cable

2. Quad-shielded five-pack (red, white, blue, green, yellow)

3. Quad-shielded five-pack (violet, orange, black, gray, brown)

1. YR46940, White Sands Engineering, single cable

2. YR50386, White Sands Engineering, five pack

3. YR52310, White Sands Engineering, five pack

MCX connector strip tool 1

1. Dual-shielded cables

2. Quad-shielded cables

1. PN-CPT-7538-125, White Sands Engineering

2. PN-CPT-7538-200Q, White Sands Engineering

MCX connector to F connector adapter

PN-53140137, White Sands Engineering

F connector strip tool

1. Dual-shielded cables

2. Quad-shielded cables

1. PN-CPT-7538

2. PN-CPT7538Q

MCX and F connector crimper tool

PN-ACT- 483, White Sands Engineering

F connector 1

1. Dual-shielded

2. Quad-shielded

1. PN-ASFP, White Sands Engineering

2. PN-ASFPQ, White Sands Engineering

Shrink tubing

Size: 1/4 inch
Shrink ratio: 2:1
Recovered wall thickness: 0.025 inch
Inside diameter after recovery: 0.125 inch

Note Do not use shrink tubing with MC20X20V quad-shielded cables.

1 Only in Europe, the Cisco UBR-MC20X20V cable interface line card must use quad-shielded cables. In all other regions, the Cisco UBR-MC20X20V cable interface line card can use dual-shielded or quad-shielded cables.

2 White Sands Engineering at the following URL: http://www.whitesandsengineering.com/


Nominal Attenuation

Table 12 shows the nominal attenuation for specified cable lengths.

Table 12 Nominal Attenuation for a 75-Ohm Miniature Headend Coaxial Cable  

MHz
dB/100 ft
MHz
dB/100 ft
MHz
dB/100 ft

1

0.39

71

3.06

270

5.40

3.58

0.78

88

3.16

360

6.20

5

0.92

100

3.33

540

7.70

7

1.08

135

3.81

720

9.47

10

1.20

143

3.92

750

9.59

67.5

2.83

180

4.38

1000

10.50


Figure 11 Nominal Attenuation Graph for 75-Ohm Miniature Headend Coaxial Cable

Safety Information and Warnings

Following are safety guidelines that you should follow when working with any equipment that connects to electrical power.

Electrical Equipment Guidelines

Follow these basic guidelines when working with any electrical equipment:

Before beginning any procedures requiring access to the chassis interior, locate the emergency power-off switch for the room in which you are working.

Disconnect all power and external cables before moving a chassis.

Do not work alone when potentially hazardous conditions exist.

Never assume that power has been disconnected from a circuit; always check.

Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.

Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which occurs when electronic cards or components are improperly handled, can result in complete or intermittent failures. The AC input power shelf and its AC power modules contain a printed circuit card that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding and connectors are integral components of the carrier. Although the metal carrier helps to protect the cards from ESD, use an anti-static strap each time you handle the modules.

Following are guidelines for preventing ESD damage:

Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact. Before removing a card from the chassis, connect the equipment end of the strap to a bare metal, unpainted surface on the chassis or rack-mount. Make sure that the chassis and/or rack has a grounding cable installed. (For more information, see the Cisco uBR10012 Universal Broadband Router Hardware Installation Guide.)

Handle components by the carrier edges only; avoid touching the card components or any connector pins.

When removing a module, place it on an anti-static surface or in a static-shielding bag. If the module will be returned to the factory, immediately place it in a static-shielding bag.

Avoid contact between the modules and clothing. The wrist strap protects the card from ESD voltages on the body only; ESD voltages on clothing can still cause damage.


Caution For safety, periodically check the resistance value of the anti-static strap. The measurement should be between 1 and 10 megohms.

Warning Definition


Warning

IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071

SAVE THESE INSTRUCTIONS

Waarschuwing

BELANGRIJKE VEILIGHEIDSINSTRUCTIES

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt raadplegen.

BEWAAR DEZE INSTRUCTIES

Varoitus

TÄRKEITÄ TURVALLISUUSOHJEITA

Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien lausuntonumeroiden avulla.

SÄILYTÄ NÄMÄ OHJEET

Attention

IMPORTANTES INFORMATIONS DE SÉCURITÉ

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil, référez-vous au numéro de l'instruction situé à la fin de chaque avertissement.

CONSERVEZ CES INFORMATIONS

Warnung

WICHTIGE SICHERHEITSHINWEISE

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden.

BEWAHREN SIE DIESE HINWEISE GUT AUF.

Avvertenza

IMPORTANTI ISTRUZIONI SULLA SICUREZZA

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le traduzioni delle avvertenze riportate in questo documento.

CONSERVARE QUESTE ISTRUZIONI

Advarsel

VIKTIGE SIKKERHETSINSTRUKSJONER

Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne enheten.

TA VARE PÅ DISSE INSTRUKSJONENE

Aviso

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo.

GUARDE ESTAS INSTRUÇÕES

¡Advertencia!

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña a este dispositivo.

GUARDE ESTAS INSTRUCCIONES

Varning!

VIKTIGA SÄKERHETSANVISNINGAR

Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna anordning.

SPARA DESSA ANVISNINGAR

 



Installing or Replacing a Cisco UBR-MC20X20V Cable Interface Line Card

Use the following procedure to install a Cisco UBR-MC20X20V cable interface line card in the Cisco uBR10012 universal broadband router chassis.


Note The following instructions describe the connection and removal process for the customized RF cables and the maintenance of the Cisco preconfigured cable bundles.



Note If you are returning a card to the factory, after removing the card from the chassis, immediately place it into an antistatic shielding bag.



Caution For proper cooling and airflow, always install a blank cover on any empty slot in the Cisco uBR10012 universal broadband router chassis. Blank covers are available for all Cisco uBR10012 universal broadband router modules. For information about specific modules, see the "Related Documentation" section.

Tools and Equipment

To remove and replace an individual Cisco UBR-MC20X20V cable interface line card, you need the following tools and equipment:

Replacement Cisco UBR-MC20X20V card: UBR10-MC20X20V=
Blank uBR10012 card (if required): UBR10-MC-COVER=

1/4-inch flathead screwdriver

ESD-preventive wrist strap

Antistatic surface, such as a mat or antistatic bag

Unpacking the Cisco UBR-MC20X20V Cable Interface Line Card

To unpack the Cisco UBR-MC20X20V cable interface line card, complete the following steps:


Caution Make sure you are properly grounded with an ESD-preventative ground strap.

Step 1 Remove the Cisco UBR-MC20X20V cable interface line card from the box.

Step 2 Place the card on an antistatic surface.

Step 3 Remove the protective sticker covering the DS ports.

Step 4 Review the installation information for the card.



Note For Class B emission compliance, a ferrite needs to be installed on each of the input DC power harness when Cisco UBR-MC20X20V line cards are installed in the Cisco uBR10K chassis. This is mandatory only when the DC PEMs are used and is not needed when the AC power supply is used.
Only one ferrite is needed per power harness. There will be two ferrites in the Cisco uBR10K accessory kit. When the Cisco UBR-MC20X20V line card is shipped as a spare, two ferrites will be included in the Cisco UBR-MC20X20V accessory kit.


Removing UCH2 from the Cisco UBR-MC20X20V Cable Interface Line Card


Note The UCH2 should be used with the Cisco UBR-MC20X20V cable interface line card. For more information, see the "Installing or Replacing Cables in UCH2" section.



Caution Make sure you are properly grounded with an ESD-preventative ground strap.


Step 1 Carefully move the cables away from the front of the card so that you can easily reach the leadscrew on the UCH2.

Step 2 Use the flathead screwdriver to loosen the leadscrew on the UCH2. Turn the leadscrew counterclockwise. (See Figure 12.)

Step 3 Unscrew the leadscrew until it is completely out of the faceplate on the line card.

Figure 12 Unscrewing the UCH2

Step 4 Use the leadscrew to pull the UCH2 and cables straight away from the card. (See Figure 13.)


Caution Do not use the cables to pull the holder from the faceplate. Be careful not to bend the cables at right angles to the holder.

Figure 13 Removing the UCH2 from the Line Card

Step 5 Move the cables and the UCH2 away from the front of the line card.

Step 6 Repeat Step 1 through Step 5 for the other UCH2s.


Removing the Cisco UBR-MC20X20V Cable Interface Line Card from the Card Slot


Step 1 Unscrew the captive screws on the front of the cable interface card.

Step 2 Simultaneously pivot both ejector levers away from the cable interface line card to disengage the card from the backplane. (See Figure 14.)

Figure 14 Unscrewing the Captive Screws and Opening the Ejector Levels

Figure 15 Removing the Cable Interface Line Card from the Chassis


Caution Always handle the card by the carrier edges because the upconverter on the bottom side of the line card may be hot to the touch. Dropping the card can damage the carrier rails and card guides, making it difficult to reinstall.

Step 3 Slide the card out from the chassis and place it on an antistatic surface or in a static shielding bag with the component side up.

Step 4 If you are installing a new or replacement card, see the "Installing the Cisco UBR-MC20X20V Cable Interface Line Card in the Card Slot" section. Otherwise, install a blank cover over the slot and screw down its captive screws.


Caution For proper cooling and airflow, always install a blank card cover in unused line card slots.


Installing the Cisco UBR-MC20X20V Cable Interface Line Card in the Card Slot


Caution Make sure your ESD wrist strap is properly attached to a chassis ground location.


Step 1 Carefully align the top and bottom edges of the card with the guides in the chassis.


Caution This Cisco UBR-MC20X20V cable interface line card weighs 16 lbs. Use both hands when handling the card. Do not drop the card or otherwise damage the carrier rails. Bent or damaged rails can damage the card guides and prevent line card installation. When installing cards for the first time, or when all the captive screws of the card are loose, insert cards first in slot 5/1 and work towards slot 8/0 to prevent uneven gasket pressure.

Step 2 Slide the card into the slot. (See Figure 16.)

Figure 16 Inserting the Cisco UBR-MC20X20V Cable Interface Line Card

Figure 17 Closing the Ejector Levers

Step 3 Simultaneously close the ejector levers to secure the card in the backplane. (See Figure 17.)

Step 4 Engage and begin tightening the captive screws first by hand. Then, use either a T-10 Torx (included in the line card accessory kit) or a common flathead screwdriver to tighten the captive screws between 5 to 7 in-lbs.


Caution Always tighten the captive screws on each line card, but not more than the maximum of 7 in-lbs. These screws prevent accidental removal and provide proper grounding for electromagnetic interference (EMI) shielding.


Note When fully inserted, the line card cycles through its power-on self-test, and the POWER and STATUS LEDs turn on. (If either of those LEDs is flashing, see the "Troubleshooting the Cisco UBR-MC20X20V Cable Interface Line Card Installation" section).



Installing UCH2 on the Cisco UBR-MC20X20V Cable Interface Line Card


Caution The UCH2 must be used for all cable connections to the line card. Failure to use a UCH2 may cause permanent damage to the line card connectors, resulting in low or no RF output in the downstream or low or no RF input in the upstream.

To install UCH2, complete the following steps:


Step 1 Position UCH2 so the red line is on the same side as the red triangle on the card.

Step 2 Align the end pins on UCH2 with the pin holes in the faceplate. (See Figure 18.)


Caution When you are replacing the UCH2, be careful not to bend the cables in the holder at right angles.

Step 3 While holding the UCH2 and cables in place on the faceplate, use your fingers to tighten the leadscrew. If the UCH2 and cables do not appear to settle securely in place on the faceplate, wiggle the holder to resettle the connectors. (See Figure 19.)

Step 4 Use the flathead screwdriver to tighten the leadscrew. Turn the leadscrew clockwise until it will no longer turn (10 in-lbs, maximum torque 15 in-lbs).


Caution Torquing the leadscrew to more than the maximum of 20 in-lbs can cause the leadscrew to fail.


Note As you turn the leadscrew clockwise, the outer shroud on the UCH2 moves to cover the red line on the top and the black line on the bottom of the UCH2. The half circles on the edge of the shroud appear to close as the shroud fits down over the UCH2. Full engagement is indicated by visible metal-to-metal contact between the UCH2 and the faceplate (check the half circle cutouts).


Figure 18 Aligning the UCH2 with the Cable Interface Card Dense Connector Ports

Figure 19 Installing the UCH2 on the Faceplate

Step 5 Repeat Step 1 through Step 4 for the other two UCH2s.

Step 6 Configure the Cisco UBR-MC20X20V cable interface line card if required as described in Configuring the UBR-MC20X20V Cable Interface Line Card.


Note It is not necessary to configure the cable interface line card if you are installing a replacement card in the identical slot. After the reset cycle, the software detects all modules on each line card and generates the proper data structure for them.



Installing or Replacing Cables in UCH2

The UCH2 is designed to stabilize the cables and hold them in place.

Tools and Equipment

The tools listed below are designed to help you remove and install cables in the UCH2.

T-10 TORX driver tool—Removes the cable clamp bar.

Cable heat-shrink wrap—Adds strength to the dual-shielded cables and connector connection.


Note Do not use heat-shrink wrap on MC20X20V quad-shielded cables.


Cables—75-ohm precision miniature video cable, MC20X20V dual-shielded or quad-shielded bonded foil 1855 type.

Removing Cables

To remove the old cables, complete the following steps:


Step 1 Use the T-10 TORX driver tool to loosen the UCH2 lock bar on the side from which you want to remove a cable. (See Figure 20.)

Step 2 Slide open the lock bar by hand, or with a flathead screwdriver if the bar is tight or hard to access. (See Figure 21.)

Figure 20 Using the T-10 TORX Driver Tool to Loosen the UCH2 Lock Bar

Figure 21 Using a Screwdriver to Slide Open the Lock Bar on the UCH2

Step 3 Carefully pull the cable completely out of the UCH2.


Caution Be careful not to bend the cables at right angles.


Note If the cable does not come loose from the UCH2, make sure the lock bar is completely open.


Step 4 Repeat for each cable you are removing.


Installing Cables

Cisco cables are color-coded for easy reference and installation. The cable color corresponds to a specific port on the card. The tables include a column for users to define ports and color definitions.

Table 13 lists the cable ports and associated cable color applicable when using MC20X20V dual-shielded cables or quad-shielded cabling.


Note Precision miniature video coaxial cables come in various colors, and you can use any cable color combination. However, when you are connecting the Cisco UBR-MC20X20V cable interface line card to the Cisco RF switch, we recommend that you install the cables in the UCH2 as shown in Figure 24, and listed in Table 13.


Table 13 MC20X20V Dual/Qual Shielded Cable Ports and Cable Colors 

Universal Cable Holder (1)
Universal Cable Holder (2)
Universal Cable Holder (3)
Line Card Port
Cable Color
RF Switch User Defined
Line Card Port
Cable Color
RF Switch User Defined
Line Card Port
Cable Color
RF Switch
User Defined

US1 0

Red

 

US10

Gray

 

DS2 0

Red

 

US1

White

 

US11

Brown

 

DS1

White

 

US2

Blue

 

US12

Red

 

DS2

Blue

 

US3

Green

 

US13

White

 

DS3

Green

 

US4

Yellow

 

US14

Blue

 

DS4

Yellow

 

US5

Violet

 

US15

Green

 

 

US6

Orange

 

US16

Yellow

 

 

US7

Black

 

US17

Violet

 

 

US8

Gray

 

US18

Orange

 

 

US9

Brown

 

US19

Black

 

 

1 US = upstream

2 DS = downstream


Table 14 Legacy 5-Color MC20X20V Quad-Shielded Cable Ports and Cable Colors 

Universal Cable Holder (1)
Universal Cable Holder (2)
Universal Cable Holder (3)
Line Card Port
Cable Color
RF Switch User Defined
Line Card Port
Cable Color
RF Switch User Defined
Line Card Port
Cable Color
RF Switch
User Defined

US1 0

Red

 

US10

Red

 

DS2 0

Red

 

US1

White

 

US11

White

 

DS1

White

 

US2

Blue

 

US12

Blue

 

DS2

Blue

 

US3

Green

 

US13

Green

 

DS3

Green

 

US4

Yellow

 

US14

Yellow

 

DS4

Yellow

 

US5

Red

 

US15

Red

 

 

US6

White

 

US16

White

 

 

US7

Blue

 

US17

Blue

 

 

US8

Green

 

US18

Green

 

 

US9

Yellow

 

US19

Yellow

 

 

1 US = upstream

2 DS = downstream


To replace cables or install new cables in a UCH2, complete the following steps:


Step 1 Use the T-10 TORX driver tool to loosen the lock bar on the side in which you want to install a cable. (See Figure 20.)

Step 2 Use a flathead screwdriver as a lever to slide open the lock bar. (See Figure 21.)

Step 3 Remove the ESD cap from a cable (see Figure 22 and Figure 23) and place it into the hole in the UCH2. (See Figure 24.) Use Table 13 to determine the correct color and location for each colored cable.

Figure 22 Removing an ESD Cap from a MCX connector

Figure 23 Removing an ESD Cap from an F connector

Figure 24 Placing Cables in the UCH2

Step 4 Insert and wiggle the connector into the hole.


Note The cables fit loosely in the holes, and are not locked into place until the lock bar is closed in Step 6.


Step 5 Repeat Step 3 and Step 4 for the remaining cables you are installing.


Note Make sure the cables are aligned correctly and inserted completely or the slide bar will not close.


Step 6 Slide the lock bar close completely, and use the T-10 TORX driver tool to tighten the screws clockwise (torque 10 in-lbs, 1.13 Newton meters (Nm)).


Note Clamp bar maximum torque 15 in-lbs (1.70 Nm).



Adding Heat-Shrink Tubing to Custom Built Cables


Note Heat-shrink tubing should be used only with MC20X20V dual-shielded cables. Do not use heat-shrink wrap with MC20X20V quad-shielded cables.


The heat-shrink tubing adds rigidity to the connection between the connector and the cable. The tubing is not required, but recommended. This procedure describes how to add heat-shrink tubing to the cables.

Tools and Equipment

Heat-shrink tubing—See the "Technical Specifications and Component Part Numbers" section.

MCX cable prep tool (cable stripper)—White Sands Engineering part number CPT-7538-125 (for dual-shielded cables).

MCX cable crimping tool—White Sands Engineering part number ACT-483.

MCX connectors—White Sands Engineering part number MCXFP (for dual-shielded cables).

Cable—75-ohm precision miniature video cable, single strand bonded foil 1855 type.

Heat source—To shrink the tubing around the cable (for example, a hand-held dryer).


Note The heat-shrink tubing cannot be added if there is a connector on the end of the cable.


Adding Heat-Shrink Tubing

To add heat-shrink tubing to the cable, complete the following steps:


Step 1 Cut the new cable to the desired length.

Step 2 Strip the cable with the MCX cable prep tool per manufacturer instructions.

Step 3 Cut a piece of heat-shrink tubing approximately 1-inch in length.


Note The heat-shrink tubing has a 2:1 ratio for shrinkage (tubing has a 0.125-in. inside diameter with a 0.025-in. thick wall after recovery).


Step 4 Slide the tubing onto the cable.

Figure 25 Heat-Shrink Tubing on Cable Before Shrinking

Step 5 Install a MCX connector per manufacturers instructions.

Figure 26 Installing MCX Connectors

Step 6 Slide the heat-shrink tubing down the cable until the end is touching the connector.

Step 7 Use a heat source (hand-held dryer) to shrink the tubing around the cable.

Step 8 If the tubing overlaps the connector after it has shrunk, cut back the shrink tubing to the end of the connector.


Note If the tubing overlaps the connector, the connector will be difficult to install in the UCH2 slot, and the UCH2 may not function properly.



Troubleshooting the Cisco UBR-MC20X20V Cable Interface Line Card Installation

Check the following:

1. Verify that the captive screws and ejector levers are secure.

a. Check that the captive screws are secure in the faceplate.

b. Check that the ejectors levers are properly closed.

2. Verify that the card is properly seated in the chassis.

a. Release the ejector levers and captive screws.

b. Slide the card partially out of the chassis and then slide it back in, making sure that it is properly seated in the backplane.

c. Close the ejector levers and tighten the captive screws.

3. Verify that the UCH2 is securely in place on the faceplate.

a. Check that the leadscrew is secure.


Note The recommended maximum torque that should be applied to a leadscrew is 15 in-lbs
(1.69 Nm).


4. Verify that the connectors are properly seated in the ports on the faceplate.

a. Verify that no cables are broken at the connector.

b. Verify that the cables are properly secured in the UCH2.

c. Verify that all the MCX connectors are protruding the same distance out of the UCH2.


Note Use the MCX to F connector adapter to easily adapt the MCX connection for testing the cables.


5. Verify that the lock bar on the UCH2 is in place and tightened.

Downstream RF Power Measurement Caution


Caution Exposure to ESD can damage this product.

If downstream RF power measurements are made on the Cisco UBR-MC20X20V cable interface line card, all the ESD precautions listed below must be followed to prevent damage to the product:

1. Check for a proper ground on the equipment and chassis before connecting any cables.

2. Ensure there is a common ground between all the test equipment and the unit under test.

3. Keep test cables as short as possible to limit static buildup.

4. Before attaching any test cables to the unit under test, momentarily ground the center pin of the test cable to remove any static buildup that may be present.

Broken Leadscrews

To remove a lead screw that has broken off in the faceplate of the card, complete the following steps:


Step 1 Remove the cable bundle and UCH2 from the faceplate.

a. Take hold of the entire bundle of cables with one hand, and hold the card in place with the other.

b. Pull the cables and UCH2 away from the card.


Note If the UCH2 does not immediately come away from the faceplate, gently wiggle the UCH2 up and down while at the same time pulling it away from the faceplate.


Step 2 Inspect the screw hole and blow away any debris.

Step 3 Insert a small flathead screwdriver into the leadscrew hole.

Step 4 Press down and rotate the screwdriver counterclockwise until the broken part of the lead screw emerges from the hole.

Step 5 Use your fingers or needle-nose pliers to rotate the leadscrew the rest of the way out of the hole.


Related Documentation

For more information about the Cisco UBR-MC20X20V cable interface line cards, Cisco uBR10012 universal broadband router chassis, and software configuration, see the following documents:

Configuring the Cisco UBR-MC20X20V Cable Interface Line Card

http://www.cisco.com/en/US/docs/interfaces_modules/cable/broadband_processing_engines/ubr_mc20x20v/configuration/guide/mc20x20v_cfg.html

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

http://www.cisco.com/en/US/docs/cable/cmts/ubr10012/installation/guide/hig.html

Cisco uBR10000 Series Universal Broadband Router Release Notes

http://www.cisco.com/en/US/products/hw/cable/ps2209/prod_release_notes_list.html

Cisco uBR10012 Router Software Features

http://www.cisco.com/en/US/products/hw/cable/ps2209/products_feature_guides_list.html

Cisco uBR10012 Universal Broadband Router Software Configuration Guide

http://www.cisco.com/en/US/docs/cable/cmts/ubr10012/configuration/guide/scg.html

Cisco IOS CMTS Cable Software Configuration Guide, Release 12.2SC

http://www.cisco.com/web/techdoc/cable/Config/Sw_conf.html

Cisco IOS CMTS Cable Command Reference

http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html


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