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ADCP-75-132 • Issue 2C • August 2006

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3.6 System Expansion Planning

The DEU enables 6-way expansion of any optical port. This makes it possible to add more

DRU’s without having to install additional DHU’s. Each DHU is equipped with six optical

ports. If more than six DRU’s are required by the application, a DEU may be connected to one

of the optical ports at the DHU which expands that port to six ports. If still more optical ports

are required, then a second DEU may be connected to the DHU or a second DEU may be

connected to the first DEU. The ability to cascade DEU’s in parallel or in series provides

unlimited flexibility. It is physically possible to connect an unlimited number DRU’s to the

DHU through the installation of DEU’s.

The total number of DRU’s that can be served is limited by the cumulative noise effect caused

by antenna combining. This number cannot be determined until the radius distance of coverage

required at the DRU antenna is determined and the path loss attributed to the structure are

known. The system design requires that the carrier to noise differential be greater than the

customer’s desired signal to noise ratio.

If it is likely that the system will be expanded in the future, locate the DHU in such a way that it can

be used as a hub for an expanded system. It should be noted that a DEU can be used as an optical

regenerator. A DRU may sometimes need to be located at a point that is beyond the distance

limitation imposed by the optical fiber. The solution is to install a DEU at the maximum optical

fiber length from the DHU. This provides an additional 500 m, 750 m, or 10 km (depending on the

fiber type) of optical fiber length beyond the DEU for connecting the DRU.

3.7 DRU Antenna Options

Various antennas, shown in Figure 12, are available from ADC for use with the DRU. All

antennas include a 6-foot (1.8 m) long 50-ohm coaxial cable (equipped with SMA male

connector) for connection to the DRU. The DRU is equipped with an SMA female connector

for connecting the antenna cable.

The DRU antennas are designed for unobtrusive mounting within an office environment. Each

type of antenna provides a specific coverage pattern in order to accommodate the shape of the

area where coverage is required. The ceiling-mount omni directional antenna is designed to

mount in the center of the coverage area. The directional panel antenna is designed to mount

vertically on one side of the coverage area or in the corner of the coverage area. The ceiling

mount hallway antenna is designed to mount in the center of long corridors. Non-ADC

antennas may also be used with the DRU to meet various application requirements, but must

comply with equipment authorization for RF exposure compliance.

Note: To comply with Maximum Permissible Exposure (MPE) requirements, antennas must

be installed to provide at least 20 centimeters (8 inches) of separation from all persons per

FCC 47 CFR part 2.1091 and IC RSS-102, Section 2.5.2.

Summary of content (25 pages)

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ADCP-75-132 • Issue 2C • August 2006 3.6 System Expansion Planning The DEU enables 6-way expansion of any optical port. This makes it possible to add more DRU’s without having to install additional DHU’s. Each DHU is equipped with six optical ports. If more than six DRU’s are required by the application, a DEU may be connected to one of the optical ports at the DHU which expands that port to six ports.
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ADCP-75-132 • Issue 2C • August 2006 4 dBi GAIN CEILING-MOUNT HALLWAY MOUNTING STUD LENGTH - 1.5 INCHES (38 mm) DIAMETER - 0.875 INCHES (22 MM) DIAMETER - 4.2 INCHES (106.7 MM) DEPTH - 0.91 INCH (23 MM) 2.4 INCHES (61 MM) 3 INCHES (75 MM) 2.5 dBi GAIN CEILING-MOUNT OMNIDIRECTIONAL 0.29 INCH (7.4 MM) 6 INCHES (152 MM) 1.4 INCHES (36 MM) INCLUDES ADJUSTABLE MOUNTING BRACKET (NOT SHOWN) 5.5 INCHES (140 MM) 8 dBi GAIN 90 DEGREE DIRECTIONAL PANEL (WALL/CORNER-MOUNT) 18079-A Figure 12.
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ADCP-75-132 • Issue 2C • August 2006 of the problem by observing the LED indicators on each unit and then performing various tests to isolate the problem. Once the source of the fault is isolated, the appropriate action can be taken to correct the problem. The only unit components that can be replaced are the cooling fans which are mounted in the DHU and the DEU and the modular optical transceivers. The failure of any other component within a unit will require replacement of the unit.
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ADCP-75-132 • Issue 2C • August 2006 3.10.2 Phase Two – System Design Determine forward and reverse path loss and then design for unity gain on the uplink and maximum power out of the DRU on the downlink: The overall purpose of the Digivance ICS is to transparently overcome attenuation losses, not to provide additional gain beyond what is required to bring the signal to unity gain. Complete the following steps to make this determination: 1.
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ADCP-75-132 • Issue 2C • August 2006 3. Conduct an initial performance evaluation and complete the following: a) b) c) Confirm proper isolation, signal quality, and power levels. Make test calls from DRU service area and evaluate call quality (confirm with service provider if desired). Address performance issues as needed. 4. Install the remaining DRU’s and also any DEU’s as described in the Digital Expansion Unit Installation Instructions (ADCP-75-111). Test call quality and range of each DRU as needed.
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ADCP-75-132 • Issue 2C • August 2006 4 DIGITAL HOST UNIT INSTALLATION PROCEDURE This section provides the installation procedures for the DHU. Installation of the DEU(s) and DRU(s) may proceed separately from the installation of the DHU. The installation procedures for the DEU are provided in the Digital Expansion Unit Installation Instructions (ADCP -75111) which are shipped with the DEU.
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ADCP-75-132 • Issue 2C • August 2006 The following materials are required in order to complete the procedures in this section: • Wall-mount fasteners (wall-mount applications only) • #22 AWG (0.40 mm) category 3 or 5 cable (for power cable and external alarm connections) • RJ-45 male connectors (for power cable) • #18 AWG (1.00 mm) insulated stranded copper wire (for chassis grounding wire) • Ring terminal for #18 wire (for chassis ground wire connection) • 50 or 62.
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ADCP-75-132 • Issue 2C • August 2006 ALIGN DIP SWITCH HANDLES AS SHOWN ON THE LABEL TO PROVIDE SPECIFIED FREQUENCY BAND SWITCH POSITIONS AS SEEN THROUGH HOLE MOVABLE TAB SHOWN WHITE SWITCH POSITIONS AS SEEN THROUGH HOLE FORWARD REVERSE BLOCK A,D 1930-1950 1850-1870 BLOCK D,B,E 1945-1970 1865-1890 BLOCK B,E,F 1950-1975 1870-1895 BLOCK E,F,C 1965-1990 1885-1910 MOVABLE TAB SHOWN WHITE FORWARD REVERSE BLOCK A,D 1930-1950 1850-1870 BLOCK D,B,E 1945-1970 1865-1890 BLOCK B,E,F 1950-1975
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ADCP-75-132 • Issue 2C • August 2006 3. Reinstall both mounting brackets so the long side of the bracket is flush with the DHU front panel as shown in Figure 14. Use the screws removed in step 2 to re-attach the brackets to the DHU enclosure. 4. Position the DHU in the designated mounting space in the rack (per system design) as shown in Figure 15. REMOVE AND REINSTALL MOUNTING BRACKETS AS SHOWN FOR INSTALLATION IN 23-INCH RACKS 17271-A Figure 14.
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ADCP-75-132 • Issue 2C • August 2006 4.5.2 Wall-Mount Installation The DHU may be mounted from any flat vertical surface. It is recommended that a backer board such as 3/4-inch plywood be applied over the mounting surface to provide a secure base for attaching the DHU. Two mounting holes are provided in the cable management tray for securing the DHU to the mounting surface. The fasteners must be provided by the installer.
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ADCP-75-132 • Issue 2C • August 2006 4. Set the DHU aside and then drill appropriately sized holes in the mounting surface for the fasteners. 5. Partially install the fasteners in the drilled holes. Leave the head of each fastener protruding about 1/4 inch (6 mm) from the mounting surface. 6. Hang the DHU from the fasteners and then securely tighten each fastener. 4.6 Chassis Ground Connections A stud is provided on the front side of the chassis for connecting a grounding wire to the chassis.
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ADCP-75-132 • Issue 2C • August 2006 4.7 Coaxial Cable Connections The RF interface between DHU and the BTS is supported through a pair of type N female connectors mounted on the DHU front panel. One connector provides the coaxial cable connection for the forward path (downlink) signal. The other connector provides the coaxial cable connection for the reverse path (uplink) signal. Coaxial cables link the DHU to the BTS through an interface device such as the HPCP or the RIU.
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ADCP-75-132 • Issue 2C • August 2006 4.8 Modular Optical Transceiver Installation The modular optical transceivers are available separately and may or may not be installed in the DHU depending on the configuration ordered. If the optical transceivers are factory installed in the DHU, skip this section and proceed to Section 4.9. If the optical transceivers are not factory installed, use the following procedure to install each transceiver: 1.
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ADCP-75-132 • Issue 2C • August 2006 5. Insert the optical transceiver into the socket until it locks into place. 6. Replace the optical transceiver dust cap if it was removed for installation. 7. Repeat procedure for each optical transceiver that requires installation. 8. Install a port cover (see Figure 19) over each unused optical transceiver socket. 4.9 Ports 1–6 Optical Connections The optical interface between the DHU and each DEU or DRU is supported by six optical ports.
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ADCP-75-132 • Issue 2C • August 2006 OPTICAL CONNECTOR ASSEMBLY DETAIL FORWARD PATH (TX) CONNECTOR REVERSE PATH (RX) CONNECTOR CABLE GUIDE DETAIL PORT 1 OPTICAL TRANSCEIVER OPTICAL CONNECTOR DESIGNATION CARD AND CLEAR HOLDER DETAIL PLASTIC COVER CARD CABLE GUIDES 17274-A HOLDER Figure 20. Ports 1–6 Fiber Optic Cable Connections TRANSCEIVER COLOR CODE BLUE = SINGLE-MODE (9 MICRON) BLACK/ BEIGE = MULTI-MODE (50 OR 62.
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ADCP-75-132 • Issue 2C • August 2006 7. Remove the dust caps from the optical fiber connectors and the port 1 optical transceiver. Note: Leave the dust cap in place on any unused optical transceiver. 8. Clean each connector (follow connector supplier’s recommendations) and then insert the optical fiber connector pair into DHU optical port 1 (see Figure 20). 9.
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ADCP-75-132 • Issue 2C • August 2006 5. Connect the DC power cable to the DHU port 1 DC PWR jack as shown in Figure 22. 6. Place the DC power cable within the cable guides provided (see Figure 22) and then dress and secure the cable at the DHU per standard industry practice. RJ-45 CONNECTOR DETAIL 1 8 RJ-45 CONNECTOR PORT 1 DC POWER CONNECTOR 17275-A CABLE GUIDE DETAIL CABLE GUIDES Figure 22. 48 VDC Power Cable Connection 7.
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ADCP-75-132 • Issue 2C • August 2006 3. Strip back the outer cable sheath and insulation to expose the wires at both ends of the cable and strip back 0.2 inches (5 mm) of insulation each wire. 4. Connect the Major alarm wire pair to the MAJOR COM/NC or MAJOR COM/NO terminals (whichever is required by the external alarm system) on the DHU alarm terminal connector (supplied with DHU) as shown in Figure 23.
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ADCP-75-132 • Issue 2C • August 2006 1. Locate the 120 VAC power cord which is provided separately with the DHU. Use only the AC power cord provided with the DHU or an equivalent UL/CUL listed 3-conductor, 18 AWG cord terminated in a molded-on plug cap rated 125 V, 15 A with a maximum length of 6 feet (1.8 m). Note: The DHU is intended to be used with a 3-wire grounding type plug which has a grounding pin. Equipment grounding is required to ensure safe operation. Do not defeat the grounding means.
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ADCP-75-132 • Issue 2C • August 2006 5 SYSTEM OPERATION This section provides guidelines for turning-up the Digivance ICS, verifying that all units are operating properly, testing to ensure that all performance requirements are satisfied, and correcting any installation problems. This process assumes that the various units that comprise the Digivance ICS have been installed in accordance with the system design plan and the BTS interface unit (HPCP or RIU) has been installed and tested.
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ADCP-75-132 • Issue 2C • August 2006 10. Verify that the PORT 1 OK/NOK LED on the DHU turns yellow (for approximately 6 seconds) and then green. 11. If a DEU is connected to PORT 1, proceed to step 12. If a DRU is connected to PORT 1, skip steps 12 through 14 and proceed to step 15. 12. Verify that the HOST PORT LED on the DEU turns green. 13. Place the PORT 1 ON/OFF switch on the DEU in the ON position (press I). 14.
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ADCP-75-132 • Issue 2C • August 2006 Table 9. Digital Expansion Unit LED Indicators INDICATOR COLOR UNIT LED Green Yellow Red Off HOST PORT LED Green Red (blinking) Off PORT 1–6 OK/NOK LEDs Green Yellow Red (steady) Red (blinking) DESCRIPTION Indicates when the DEU is normal or faulty. DEU in normal state, no faults detected. DEU high temperature fault detected. (see Note) DEU internal fault detected. (see Note) AC power off to DEU or DEU internal fault.
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ADCP-75-132 • Issue 2C • August 2006 5.3 RF Input and Output Signal Level Adjustments The DHU may be connected to either a donor antenna or a base transceiver station through an ancillary interface device. The following sections provide general guidelines for using the interface device to adjust the forward and reverse path signals to the correct level. 5.3.
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ADCP-75-132 • Issue 2C • August 2006 10. Use the interface device to slowly increase the level of the forward path RF signal supplied to the DHU. Make all adjustments to the signal level in 1 dB increments. Caution: Do not supply the DHU with an RF input signal that is 0 dBm or greater or the system could be damaged. 11. Continue to increase the forward path RF signal level until the DHU overdrive LED just begins to turn red. 12.
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ADCP-75-132 • Issue 2C • August 2006 2. Verify that the reverse path (uplink) signal level at the local BTS or donor antenna is optimized. Note that the reverse path output signal level required is dependent on service provider signal to noise requirements, ICS system noise floor, the service provider equipment, and the system configuration. 3. Check and record the Received Signal Strength Indication (RSSI) and any spurious emission levels at and between all DRU antennas.