Diamond Transport System Reference and Installation Manual

DT System Overview 9 November 2001 5

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DIAMOND™ TRANSPORT SYSTEMOVERVIEW

Contents

Equipment Description ...................................................................................................................................................7Diamond Transport Shelf ......................................................................................................................................9PS Series Power Supplies ...................................................................................................................................10TX and QTX Series Transmitters (Forward and Return) ...............................................................11FRX Series Forward Receivers ........................................................................................................................141RRX-D2A Digital Return Receiver .............................................................................................................152RRX Dual Return Receiver .............................................................................................................................16AMP Series RF Amplifiers ..................................................................................................................................17DT-SRS Series Splitter/Combiner .................................................................................................................18Network Interface Card (NIC) .......................................................................................................................19RPS Redundant Power Shelf ............................................................................................................................20Switch Driver .............................................................................................................................................................21Fan Bay ..........................................................................................................................................................................22

Functional Description ..................................................................................................................................................23Forward RF and Optical Signal Flow ............................................................................................................23Return Optical and RF Signal Flow ...............................................................................................................24AC and DC Power ................................................................................................................................................24Forward and Return Control Signal Flow .................................................................................................24Amplifying and Splitting the RF Signal before Transmission ...........................................................25

Configuration .....................................................................................................................................................................26Configuring a Diamond Transport Shelf ....................................................................................................26Configuring a Diamond Transport Rack ....................................................................................................27

Operating Temperatures ............................................................................................................................................28

Philips EMS Application Compatibility .................................................................................................................29

Cleaning Optical Connections .................................................................................................................................30Cleaning Transmitter Connectors and Bulkheads ................................................................................31Cleaning Receiver Connectors and Bulkheads ......................................................................................34

6 9 November 2001 DT System Overview


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Equipment Description

The Diamond™ Transport System consists of rack-mounted shelves configured with optical modules that transmit and receive analog (such as AM VSB) and digital signals. Diamond Transport shelves also hold modular RF headend amplifiers that provide additional gain to RF signals.

In its base form, the Diamond Transport System is a single shelf, holding some combination of these modules:

• PS series power supply

• TX series (forward/return) transmitter

• QTX series QAM transmitter

• FRX series forward receiver

• 1RRX-D2A series digital return receiver

• 2RRX series return receiver

• AMP series RF amplifier

• DT-SRS series splitter/combiner and bracket

• Network Interface Card (NIC)

The Diamond Transport system is flexible. You select the modules that meet your fiber optic design requirements, place Diamond Transport Shelves into racks at your headend or central office, and install the modules into the rack-mounted shelves.

Other rack-mounted Diamond Transport equipment includes the DT-Fan Bay, a redundant power shelf, and a switch driver. One Diamond Transport Fan Bay is required for every three shelves in a rack.

Figure 1. Diamond� Transport ShelfThe Diamond™ Transport Shelf accepts modules that transmit and receive analog and digital signals.


The DT Redundant Power Shelf (DT/RPS) is the same size as the Diamond Transport Shelf and provides a space-efficient alternative to conventional redundant powering configurations. The DT/RPS Shelf can house two redundant power supplies. Each redundant power supply is capable of powering one failed R-version power supply.

The DT-Switch Driver works with Philips Automatic Shutdown to prevent the transmission of optical energy through severed fiber optic cable and to ensure service continuity when failure occurs in the primary signal path.


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Diamond Transport Shelf

Function: The Diamond Transport Shelf is a 19-inch-wide, 3U-high, rack-mounted enclosure that routes signals to the plug-in modules it holds. Each shelf contains nine universal slots, identical in size, shape, and connector locations. Each standard-width module, such as a transmitter or receiver module, uses one of these slots. The shelf-mounted power supply requires two slots.

Features: The open design of the shelf and the patented diagonal fin design on the module’s housing move warm air away from the modules and out of the rack.

Models: For maximum flexibility, the Diamond Transport shelf comes in four models:

For more information on fiber management options, see “DIAMOND™ TRANSPORT SHELF,” starting on page 37.

Model DT Shelf Description

DT-SHELF-19 • for installation in 19-inch-wide racks• square front fiber tray for front fiber

managementDT-SHELF-19 w/Guide

• for installation in 19-inch-wide racks• curved front fiber guide• OR-Front/Rear Fiber Router, providing a

horizontal cable path from the front to the rear of a rack

DT-SHELF-23 • for installation in 23-inch-wide racks• square front fiber tray for front fiber

managementDT-SHELF-23 w/Guide

• for installation in 23-inch-wide racks• curved front fiber guide• OR-Front/Rear Fiber Router, providing a

horizontal cable path from the front to the rear of a rack


PS Series Power Supplies

Function: The power supply module accepts AC or DC input, depending on the model, and provides +24 VDC, +5 VDC, and –5 VDC power for plug-in modules.

Features: The PS series plug-in, shelf-mounted power supply uses AC or DC input to provide 200 watts of DC power. You need one shelf-mounted power supply for each shelf.

Models: Nine power supply models are available.

“Non-R” power supplies may be upgraded to “R” version supplies. Contact your Philips representative for more information.

The “R” Series power supply is available in five models:

• PS/AC1-0200-110V R (110 VAC)

• PS/AC2-0200-220V R (220 VAC, requires an external EMI filter [shipped with the PS-AC2-0200R] to meet CENELEC requirements)

• PS/AC3-0200-UNIV R

• PS-DC1-0200-048V R (-48 VAC)

• PS-DC2-0200-024V R (24 VAC)

The Diamond Transport system offers two options for redundant powering:

• Install a second shelf-mounted PS series power supply in each shelf.

• Install the DT/RPS Redundant Power Shelf to provide a more space-efficient redundancy for R-version power supplies.

For more information, see “PS SERIES POWER SUPPLIES,” starting on page 57, and “DIAMOND™ TRANSPORT SHELF,” starting on page 37.

Model Description

DT-PS/AC1-0200-110V Accepts 110 VAC input.DT-PS/AC1-0200-110V R Compatible with DT-RPS. Accepts

110 VAC input.DT-PS/AC2-0200-220V Accepts 220 VAC input.DT-PS/AC2-0200-220V R Compatible with DT-RPS. Accepts

220 VAC input.DT-PS/AC3-0200-UNIV R Compatible with DT-RPS. Accepts

90 to 260 VAC input.DT-PS/DC1-0200-048V Accepts –48 VDC input.DT-PS/DC1-0200-048V R Compatible with DT-RPS. Accepts

–48 VDC input.DT-PS/DC2-0200-024V Accepts +24 VDC input.DT-PS/DC2-0200-024V R Compatible with DT-RPS. Accepts

+24 VDC input.


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TX and QTX Series Transmitters (Forward and Return)

TX series plug-in AM transmitters convert a radio frequency (RF) input into an optical signal and send it, through single-mode fiber optic cable, to optical nodes in a hybrid fiber-coaxial network. The 700-TX and 800-TX modules are forward transmitters; the 200-TX modules are return transmitters.

700-TX and 800-TX Forward Transmitters

Function: The 700-TX series transmitters accept analog RF signals between 45 MHz and 550 MHz and digital RF signals between 550 MHz and 750 MHz, while the 800-TX series transmitters accept RF input to 862 MHz. Both modules provide a 1310 nm optical output.

Features: Several mechanical features make the transmitter easy to install and use.

• An FC/APC or an SC/APC optical connector on the front panel lets you make optical connections easily. Since both sides of the optical connection are accessible, you can clean the connectors properly.

• Three LEDs and two test points on the front panel help you monitor the performance of the transmitter module.

• Incoming RF signal level may be adjusted manually, with the manual gain control, or automatically, with the automatic gain control (AGC).

• The transmitter may be set for automatic shutdown to prevent the transmission of light through severed fiber optic cable.

• The housing’s thermal fins move warm air away from the module and out of the rack, increasing reliability and extending module life.

Models: Transmitters are available in several models. Select the appropriate model based on your link loss budget.

For more information, see “TX and QTX SERIES TRANSMITTERS,” starting on page 77.


200-TX Series Return Transmitters

Function: Return transmitters convert RF return signals to light energy and send it, over fiber optical cable, to 2RRX series return receivers.

The 200-TX series return transmitters reside in hubs or optical transition nodes (OTNs) and receive RF return signals from the node, via 2RRX series return receivers at the hub. After converting the RF to optical signals, the 200-TX return transmitter sends the optical signals to 2RRX series return receivers at the headend. The 200-TX series transmitters accept RF signals up to 200 MHz and provide a 1310 nm optical output.

Features: Several mechanical features make the return transmitter easy to install and use.

• The housing’s design moves warm air away from the module and out of the rack, enhancing reliability and extending product life.

• Front-panel optical connections for easy access. Since both sides of the optical connection are accessible, you can clean the connectors properly.

• Three LEDs and two test points on the front panel help you to monitor the performance of the transmitter module.

• Incoming RF signal levels may be adjusted manually, with the manual gain control, or automatically, with the automatic gain control.

Models: Return transmitters are available in three models.

*Transmitters are available with FC/APC or SC/APC optical connectors. **Optical link budget that provides a 51 dB C/N when loaded with 20NTSC channels over a single fiber.


Return Transmitter Models Optical Link Loss Budget**

DT-210-TX-*C/APC 10 dBDT-212-TX-*C/APC 12 dBDT-214-TX-*C/APC 14 dB


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QTX Series Transmitters DT-QTX quadrature amplitude modulated (QAM) transmitters are part of the SpectraHub� 1550 nm Analog/Digital Overlay Transport System designed for use in the Diamond Transport Shelf.

Function: The 800 series offers a 400 MHz to 870 MHz frequency response and is designed for both forward narrowcast and return path applications. The 200 series offers a 5 MHz to 200 MHz frequency response and is designed for return path applications.

Features: The 800 series offers users the ability to adjust the QTX’s fiber-length setting.

Models: QAM transmitters are available in several models. Select the appropriate model based on the link length and the specific International Telecommunication Union (ITU) wavelength to which the laser is to be tuned.



FRX Series Forward Receivers

Function: Forward receivers convert light energy to RF signals. FRX series forward receivers reside in hubs or optical transition nodes (OTN) and receive optical signals from 700-TX or 800-TX series forward transmitters at the headend. After converting the optical signals to RF, the FRX receiver sends them to another forward transmitter, also installed in the hub, for transmission to the node.

Features: Several mechanical features make the receivers easy to install and use.

• The housing’s thermal design moves warm air away from the module, enhancing reliability and extending product life.

• An FC/APC or an SC/APC optical connector on the front panel lets you make optical connections easily.

• One LED and one test point on the front panel help you monitor the performance of the receiver.

• The module supports Automatic Shutdown, which prevents the transmission of light through severed fiber optic cables.

Models: The FRX series forward receiver is a single forward receiver module with 45-862 MHz bandwidth and +1 dBm optical input (maximum). The FRX is available in both FC/APC and SC/APC models.

For more information, see “DT SERIES RECEIVERS,” starting on page 137.


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1RRX-D2A Digital Return Receiver

Function: The 1RRX return receiver accepts digital optical input from a TSOT-2AD/ITU series transmitter in a TIARRA node. The receiver’s digital-to-analog processor converts the optical input to two analog RF outputs.

Features: The return receiver module has several mechanical features that make it easy to install and use:

• The housing’s thermal design moves warm air away from the module.


• An LED and two test points on the front panel allow you to monitor input and output levels.

• High-efficiency optical components offer excellent carrier-to-noise performance over long links.

• The receiver can correct one-bit errors and detect two-bit errors from the bitstream transmitted by the TSOT-A2D.

• The module supports Automatic Shutdown, which prevents the transmission of light through severed fiber optic cables, as well as Philips EMS.

Models: The 1RRX is available in both FC/APC and SC/APC models.



2RRX Dual Return Receiver

Function: The 2RRX dual return receiver accepts optical return signals from the network, converts them to RF, and sends the RF to, for example, a remote monitoring source.

Features: The return receiver module has several mechanical features that make it easy to install and use:

• The housing’s thermal design moves warm air away from the module.


• Dual return receivers save critical shelf space.

• The module supports Automatic Shutdown, which prevents the transmission of light through severed fiber optic cables.

Models: The 2RRX is available in both FC/APC and SC/APC models.



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AMP Series RF Amplifiers

Function: The AMP series RF amplifier module accepts RF signals from a Diamond Transport optical receiver, boosts signal levels, and passes the amplified signals to a DT-SRS series splitter module.

Together, the AMP series amplifier and the DT-SRS splitter allow you to use one RF input, from, for example, an FRX series forward receiver, to feed up to 10 Diamond Transport transmitters. The AMP module boosts RF signal levels enough to compensate for the loss caused by splitting, making the combination of the AMP series amplifier and the DT-SRS series splitter almost transparent to the transmitters being fed.

Features: Several mechanical features make the RF amplifier module easy to install and use.

• The housing’s thermal design moves warm air away from the module and out of the rack.

• Two LEDs and one RF test point on the front panel help you monitor the amplifier performance.

• You can adjust the RF signal levels manually, with a manual gain control, also found on the front panel.

Models: The AMP series RF amplifier module comes in these models.

For more information, see “DT AMP SERIES RF AMPLIFIER,” starting on page 179.

AMP Model Description

DT 815-AMP Forward RF amplifier module with 45–862 MHz bandwidth and providing 15 dB of minimum full gain.

DT 215-AMP Return RF amplifier module with 5–200 MHz bandwidth and providing 15 dB of minimum full gain.


DT-SRS Series Splitter/Combiner

Function: The passive two- or four-way DT-SRS series splitter/combiner provides a simple means of splitting and combining RF signals at the rear of the Diamond Transport shelf.

Features: DT-SRS series splitter/combiner modules are available in both two-way and four-way configurations that share the following features:

• Die-cast chromated zinc housing

• SCTE-approved grounding screw and block

• F-port connectors comply with SCTE specification IPS-SP400 for F61 F-ports

• Single power-passing port that passes 500 mA at 60/90 volts.

Models: The DT-SRS series splitter/combiner is available in either two- and four-port RF output models.

To facilitate mounting at the rear of the DT shelf, order the DT-SRS BRACKET and DT-SRS CABLE jumpers.

For more information, see “DT-SRS SERIES SPLITTER/COMBINER,” starting on page 195.


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Network Interface Card (NIC)

Function: A network interface card (NIC) allows two-way data communication between the plug-in Diamond Transport modules and either a local CRAFT interface system or a remote element management system.

To monitor a rack of Diamond Transport equipment, you need:

• one NIC installed in each Diamond Transport Shelf

• monitoring software (either of the following)

• Philips Element Management System

• Philips DD-CI software loaded onto a personal computer that is connected to your network and the DD-CI hardware kit

Features: With the NIC and a monitoring system, you can check the status and performance of the Diamond Transport modules in a single shelf from a personal computer.

For more information, see “NETWORK INTERFACE CARD (NIC),” starting on page 209.


RPS Redundant Power Shelf

The DT Redundant Power Shelf (DT/RPS) is the same size as the Diamond Transport Shelf and provides a space-efficient alternative to conventional redundant powering configurations. The DT/RPS Shelf can house two redundant power supplies.

Function: Each redundant power supply is capable of powering one failed R-version power supply. To ensure back-up power is available when two power supplies fail simultaneously, install two DT Power Supply modules in the DT/RPS.

Features: The DT/RPS Shelf requires that only one DT Shelf be allotted to redundant powering for a fully loaded rack.

Models: The DT/RPS is available as either a shelf or as a kit for reconfiguring a standard Diamond Transport Shelf as a redundant power supply shelf.

For more information on redundant powering options, see “REDUNDANT POWER SHELF,” starting on page 267.


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Switch Driver The DT-Switch Driver works with Philips Automatic Shutdown to prevent the transmission of optical energy through severed fiber optic cable and to ensure service continuity when failure occurs in the primary signal path.

Function: The DT-Switch Driver processes Automatic Shutdown logic signals (+5 VDC) sent by the FRX, 1RRX-D2A, or 2RRX and directs optical or RF switches to use either the default (N.C. to Common) signal path or an alternate (N.O. to Common) signal path.

Features: LEDs on the front panel indicate switching activity and powering. Switches enable manual override of current path selection. Switch-control line selectors, accessible through the top panel, allow custom configuration of switching for redundant operations.

Models: The DT-Switch Driver is available in one model and is compatible with all Diamond Transport equipment.

For more information, see “DT-SWITCH DRIVER,” starting on page 247.


Fan Bay Function: The fan bay is a rack-mounted air-circulation system for the Diamond Transport equipment.

Features: The fan bay adds reliability to the Diamond Transport System with these features:

• nine fans packed into only 1U of rack space

• one fan bay supports up to three fully-loaded shelves of equipment

• two monitoring options

Front panel LEDs allow you to monitor each fan, or you can connect the fan bay to the status monitoring system to monitor remotely.

Models: Fan bays are selected based on the characteristics of supplied power.

For more information, see “FAN BAY,” starting on page 229.


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Functional Description

Components in the Diamond Transport System process radio frequency (RF), optical, AC power, DC power, and control signals.

Forward RF and Optical Signal Flow

Forward RF signals, from the combiner network or rack amplifier, enter the transmitter module through two F-connectors on the back panel. One connector carries the primary forward RF signals, and the other carries auxiliary signals for narrowcasting or directcasting. The transmitter module converts the RF signals to light energy and transmits the light energy over fiber optic cable to a forward optical receiver in the hub or to a node in the network.

HUB/OTN: A forward receiver module receives optical signals from the headend, converts them to an RF signal that is sent through RF connectors on the receiver’s back panel to a forward transmitter also installed at the hub/OTN. The transmitter produces optical signals and transmits them over fiber optic cable to a node in the field.

Figure 2. Diamond Transport System FunctionsSignals travel through the components in a Diamond Transport System as indicated in these functional blocks. Although one transmitter and one return receiver are shown, you can install several combinations of plug-in optical modules.


Return Optical and RF Signal Flow

A return transmitter in the field node sends optical return signals over fiber optic cable to the 2RRX and 1RRX-D2A return receiver modules, installed in a hub or the headend.

HUB/OTN: For the 2RRX, the two return band signals are combined in the 200TX series transmitter. The transmitter converts the combined RF signal into optical signals, which are then transmitted through fiber to the headend. At the headend, the 2RRX converts the optical signal back to RF.

Similarly, for the 1RRX-D2A, the two return band signals are combined in the TSOT-2AD series return transmitter. The transmitter digitizes the combined RF signal into 2.5 Gbps optical signal, which is then transmitted through fiber to the headend. In the headend, the 1RRX-D2A converts the digital signal back to RF.

Headend: The 2RRX and 1RRX-D2A convert the light energy to RF energy that may be sent through connectors on the receiver’s back panel to, for example, a remote monitoring source.

AC and DC Power The shelf-mounted power supply module accepts AC or DC input, depending on the model and converts the input to +24 VDC, +5 VDC, and –5 VDC.

DC power feeds into the interconnection circuit board, which directs it to all the plug-in modules.

Forward and Return Control Signal Flow

Control signals from a remote monitoring source enter the shelf through a connector on the rear panel and are routed through the interconnection circuit board to each plug-in module. Return control signals from each module are directed back through the interconnection circuit board and out of the shelf to the remote monitoring source.


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Amplifying and Splitting the RF Signal before Transmission

The AMP series RF amplifier receives RF input from an optical receiver, for example the FRX, and then amplifies it. Together, the RF amplifier and the DT-SRS series splitter/combiner modules allow you to evenly split one RF input into equal multiple outputs to feed Diamond Transport transmitters.

Figure 3. RF AmplificationWith the AMP series RF amplifier and the DT-SRS-4 splitter/combiner, you may use one RF input to feed up to four Diamond Transport transmitters. The DT-SRS-2 (not shown) feeds up to two devices.


Configuration

Because the Diamond Transport fiber optic equipment is modular, you can configure each shelf and each rack to meet the specific needs of your network.

Configuring a Diamond Transport Shelf

When deciding which modules to install in each Diamond Transport Shelf, consider the following guidelines.

Space per Module: Each shelf has nine universal module slots, identical in size, shape, and connector locations.

The number and type of modules you can install depends on the number of shelf-mounted power supplies you use. That is, installing one shelf-mounted power supply leaves seven slots for transmitters, receivers, and RF amplifiers. If you add a second power supply, you may install five other modules.

*Power supply modules require two slots.**Modules other than the DT-PS each require a single slot.

Consult the fiber optic design to determine which modules you’ll need for each link.

Powering Option

Slots for powering*

Slots for other modules**

1 Shelf Power Supply Slots 1 & 2 Slots 3 - 92 Shelf Power Supplies(1 primary, 1 redundant)

Slots 1 - 4 Slots 5 - 9

Figure 4. DT Shelf CapacityA Diamond Transport Shelf with one shelf power supply accepts seven plug-in modules, in any combination.


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Configuring a Diamond Transport Rack

For maximum product reliability and space-efficiency, Philips recommends using a fan-assisted configuration for your Diamond Transport equipment. When setting up each rack, follow these guidelines and refer to Figure 5.

Diamond Transport Equipment: Philips recommends a maximum of nine fully-loaded Diamond Transport Shelves in each standard equipment (EIA) rack.

Diamond Transport Fan Bay: Install one fan bay above each stack of up to three Diamond Transport Shelves. This allows air to flow through the patented thermal design, for maximum cooling. (See Figure 5.)

Additional Space Requirements: Leave one U of space at the top and bottom of each stack. These spaces help air to flow through the rack.

Figure 5. Rack Configurations Three configurations with proper fan bay placement.


Operating Temperatures

Thermal loading is normally lower in configurations that include a combination of transmitters, receivers, and amplifiers than in shelves of transmitters alone. Transmitters are equipped with thermal protection that shuts off the transmitter if laser temperature exceeds 75°C.

• For worst case thermal loading (seven transmitters per shelf): At 50°C, maximum rack loading is six shelves).

• For higher density requirements (seven transmitters per shelf): At 45°C, maximum rack loading is nine shelves).

Rack Configuration and Temperature

I U spaceFan BayDT ShelfDT ShelfDT ShelfFan BayDT ShelfDT ShelfDT ShelfI U space

Figure 6. High Density ConfigurationRack configuration showing maximum loading at 50°C.


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Philips EMS Application Compatibility

a. In the process of implementation.

ModelAM Communication

OmniVU 1.8AM Communication

Omni 2000Acterna

NetMentor 2.6

DT-SHELF Yes Yes Yes

DT-PS/AC1 Yes Yes Yes



DT-PS/DC1 Yes Yes Yes

DT-PS/DC2 Yes Yes Yes

DT-RPS No Yes No

DT-2**-TX Yes Yes Yes

DT-2**A-TX Yes Yes Yes

DT-7**C-TX Yes Yes Yes

DT-7**E-TX Yes Yes Yes

DT-7**G-TX Yes Yes Yes

DT-8**C-TX Yes Yes Yes

DT-8**E-TX Yes Yes Yes

DT-8**G-TX Yes Yes Yes

DT-210-QTX No Yes Yes

DT-810-QTX No Yes Yes

DT-801-FRX Yes Yes Yes

DT-803-FRX No Yes Yes

DT-1RRX-D2A No a a

DT-2RRX Yes Yes Yes

DT-215-AMP Yes Yes Yes

DT-815-AMP Yes Yes Yes

DT-SRS-2 Yes Yes No

DT-S4S-4 Yes Yes No

DT-FAN BAY/-48VDC Yes Yes Yes

DT-FAN BAY/+24VDC Yes Yes Yes

DT-SWITCH DRIVER Yes Yes No

DT-NIC Yes Yes Yes


Cleaning Optical Connections

WARNINGWhen powered, optical transmitters generate invisible, high-energy laser beams. Even when the transmitter is not powered, laser beams may be present in the optical cable.

Although you can’t see them, laser beams can cause tissue injury, including permanent eye damage. Whenever the optical cable is disconnected from the transmitter, receiver or patch panel, avoid direct contact with the end of the cable or optical output.

Be absolutely certain that optical equipment is turned off before you attempt to clean optical connections.

CAUTIONThe bulkhead and optical connector on a Diamond Transport transmitter are covered by a protective shield. To make connections or to clean connectors, you must remove the two screws holding the shield in place and then remove the shield. DO NOT put the screws back into the transmitters without the shield; doing so damages the Laser Safety Interlock switch.

The Philips optical connector cleaning kit allows you to clean the connector face and bulkhead while the connector is attached to a 1RRX-D2A, 2RRX, or FRX receiver.

Use the optical connector cleaning kit, Philips part number 7200313, when you perform this procedure.

The optical connector cleaning kit contains:

• two SC Adapter Blocks

• two FC Adapter Blocks

• two 1-X-Center Tools

• 25 1-X-Center Cleaning Rods

In addition to the cleaning kit, you will need the following:

• Philips Fiber-Connect-CLNR-ST stick-type cleaner and a Fiber-Connect-CLNR-RT cloth

• optical link fiber with optical connectors that match the connectors used with Diamond Transport modules


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Cleaning Transmitter Connectors and Bulkheads

WARNINGRefer to page 30 for warnings about handling fiber optic assemblies.

Clean connectors and bulkheads on transmitters as follows:

1. If the transmitter is on, turn it off by turning the laser key counterclockwise. Remove the key to prevent accidental reactivation during cleaning.

2. Remove the shield covering the optical bulkhead.

3. If the connector for the forward fiber is plugged into the bulkhead on the transmitter, unplug it. Then, cover the connector with a clean cap. If there is a cover on the transmitter’s bulkhead, remove it.

4. Using a TORX TX10 driver, loosen the two screws holding the bulkhead bracket.

Figure 7. Transmitter DeactivationTurn key switch counterclockwise to the off position before starting the cleaning procedure.


5. Unplug the connector using one of these methods:

• SC-type: Holding the bulkhead and the transmitter’s connector, pull the bulkhead away from the connector.

• FC-type: Holding the bulkhead and bracket, unscrew the transmitter’s connector. Then, remove the bulkhead and bracket.

Figure 8. Transmitter ShieldThe transmitter’s optical connector and bulkhead are covered by a protective shield. DO NOT put screws back into the transmitter module without the shield.

1. Remove shield.

2. Remove cap or unplug fiber.

3. Loosen screws that hold the bulkhead bracket.

4. Unplug the connector.

Figure 9. Optical ConnectorsClean optical connectors and bulkheads.

FC Bulkhead and Connector

SC Bulkhead and Connector

Keys


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6. Being careful not to bend or twist the fiber, cover the connector with a clean cap.

7. Spray the inside of the bulkhead, on both sides, with compressed air, using a can with an extension tube.

8. Clean the bulkhead with a dry, lint-free swab.

9. Remove the protective cap from the transmitter’s connector. Then, spray the connector face with compressed air.

10. Next, clean the connector face. Carefully wipe the connector face with a clean, alcohol-free Philips Fiber-Connect-CLNR-RT cloth (part number 7200161).

11. Plug the clean connector into the transmitter’s side of the bulkhead. To do so, align the connector key with the slot in the bulkhead and slide the connector into place. For an FC-type, screw the connector to tighten it.

12. Reinstall the bulkhead and bracket, using a TORX TX10 driver to tighten the bracket’s two captive screws.

13. Repeat steps 9, 10, and 11 for the forward fiber.

When cleaning is complete and bulkheads and brackets re-installed, insert key and reactivate the laser.

End of procedure.


Cleaning Receiver Connectors and Bulkheads

WARNINGRefer to page 30 for warnings about handling fiber optic assemblies.

Clean optical connectors and bulkheads on receivers as follows:

1. Make sure that the return transmitter providing the optical input to the receiver is OFF. Remove the key to prevent accidental reactivation during cleaning.

2. Unplug the fiber from the receiver’s bulkhead, or, if the bulkhead is capped, remove the cap.

Do not pull the connector and bulkhead from the receiver.

3. Cover the return fiber’s connector with a clean cap.

4. Select the appropriate adapter block: round adapter for ferrule connectors (FC); rectangular adapter for snap connectors (SC).


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5. Insert the 1-X-Center Tool into the adapter block.

6. Insert the adapter and tool assembly into the optical connector’s bulkhead.

7. Insert a 1-X-Center Cleaning Rod into the exposed end of the center tool. Push the rod fully into the tool until it contacts the optical connector face.

8. Hold light pressure on the rod to maintain contact with the optical connector face. Rotate the center tool three to four revolutions to clean the connector face.

Figure 10. Optical-Connector Cleaning KitUse the cleaning kit, with appropriate adapter style, for cleaning the 1RRX-D2A, 2RRX, and FRX receivers’ optical connectors.


9. Remove and discard the center cleaning rod. Remove the center tool and adapter ; keep them for future use.

10. Clean the return fiber’s connectors. Remove the protective cap from the return fiber’s connector. Then, spray the connector face with compressed air.

11. Carefully wipe the connector face with a clean, alcohol-free Philips Fiber-Connect-CLNR-RT cloth.

Repeat this procedure for the second set of connectors. Use a new cleaning rod must be used for each connector to avoid transfer of contaminants.

Documents

Diamond Transport System Reference and Installation Manual