Chapter 4 Installation and Alignment This Chapter describes the following: • Preparation, page 44 • Installing the Hub ODU, page 47 • Installing the Hub IDU, page 57 • Installing the Remote ODU, page 67 • Installing the Remote IDU, page 68 • Remote Antenna Alignment, page 69 Perform the installation in the sequence presented in this Chapter. Refer to the site survey and the Grounding chapter of this manual for supporting information.
44 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Preparation Communications Two-way radio communications are recommended between personnel: • hub ODU to hub IDU • remote ODU to remote IDU • remote antenna alignment Wiring Closet Recommendations Installation of the Wavtrace system covers most wiring closet concerns. Wavtrace recommends checking the following items: • Ground the racks properly. The racks provide a secondary ground for the system.
Chapter 4: Installation Draft: 8/13 45 • Locate the equipment in the same immediate area (e.g., adjacent cabinets) as any other equipment that has a connection between the protective earthed conductor of the same dc supply circuit and the protective earth conductor, and also the point of protective earth of the dc system. Do not earth-ground the dc system elsewhere. • Locate the dc supply source within the same premises as this equipment.
6 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Tools Table 2: Required Installation Tools Required tools Hub ODU Hub IDU Open-end wrench set, 9/16"–3/4" X X X Hex key set, 1/4"–3/8" X Flush cutters X X X ODF alignment bracket X Inclinometer X GPS testing device X #2 Philips screwdriver X Std crimps for fuse holder X Remote Remote ODU IDU X X Weatherproofing Weatherize all connectors exposed to the elements.
Chapter 4: Installation Draft: 8/13 47 Installing the Hub ODU Inspect and Verify the Equipment 1 Verify that the equipment and hardware matches the packing list. 2 Inspect the equipment for shipping damage. Install the ODF Mounting Bracket to the Tower Mast Install the bracket on the pipe in the general area of the azimuth. 1 Place the outward side of the bracket toward the azimuth.
48 Draft: 8/13 PTM 1000 Operations and Maintenance Manual . Figure 16 ODF Mounting Bracket Warning Note 2 Wrap two U-bolts around the antenna mast and thread through the appropriate mounting bracket holes. 3 Fasten with ½” nuts, flat washers and lock washers supplied. When installing a hub ODU on a mast or tower, ensure that the unit is properly secured prior to lifting. If hoisting is required, use a tag line to maintain control of the ODF.
Chapter 4: Installation Draft: 8/13 49 Install the ODF 1 Install the frame turnbuckle on the mounting bracket using ¼” socket nut and ¼” hex key wrench. 2 Set the turnbuckle for mid range to allow fine adjustments in either direction. 3 Install the ODF on the bracket using swivel nuts provided. (Do not tighten completely.) 4 Install the final frame turnbuckle assembly to the ODF using ¼” socket nut and ¼” key wrench.
50 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Perform a Quadrant Alignment Use the azimuth aiming bracket (from Wavtrace) to align the ODF. Figure 18 Azimuth Aiming Bracket on ODF 1 Install two socket head cap screws into the desired position on the ODF. 2 Place the azimuth aiming bracket keyhole over screws in the ODF, then slide the bracket against the narrow end of the keyhole. 3 Using a digital compass, align sights to the azimuth bracket.
Chapter 4: Installation Draft: 8/13 51 Line-of-sight can be defined as: • No obstacles in the direct path between the two antennas. • No obstacles within a defined zone around the antenna beam. As a general rule, line-of-sight can be achieved more easily if the ODF and TRA are mounted as high as possible, above potential obstructions such as trees and other buildings. An acceptable height is between five and ten feet above the roof line.
52 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Install the TRA Note 1 Log the TRA label and Electronic Serial Number for programming reference. Refer to the “Site Survey” for additional specific information. 2 Secure the TRA in position on the ODF. Set the downtilt/uptilt parameters according to specifications in the Site Survey. Verify proper antenna assembly is being installed, i.e., 30° highor low-gain vertical/horizontal polarity. .
Chapter 4: Installation Note Draft: 8/13 Each tooth on TRA mounting bracket represents five degrees of tilt axis. A TRA can be adjusted for 35 degrees of uptilt/downtilt elevation. 4 Example 53 For fine elevation adjustments (less than five degrees), loosen the upper socket head screws, then turn the adjustment knob to dial in the angle. Tighten both socket head screws when elevation adjustment is complete.
54 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Install the ODB 1 Wrap the two U-bolts around the antenna mast and thread through the matching holes in the back of the ODB. 2 Fasten with four flange serrated hex nuts and four star washers. .
Chapter 4: Installation Draft: 8/13 55 Connect the TRA cables to the ODB Specific TRAs are designated for specific remotes. TRAs have already been placed in their appropriate slots. Connect the TRA cables to the ODB using a TRA labeling scheme in numerical sequence. Caution ! If the IDU is already installed and powered, –48 Vdc is present on interconnecting cables. Care should be taken not to short the center conductor to ground. This may cause damage to the equipment.
56 Draft: 8/13 PTM 1000 Operations and Maintenance Manual .
Chapter 4: Installation Draft: 8/13 Installing the Hub IDU Inspect and verify the equipment: 1 Verify that the equipment and hardware matches the packing list. 2 Inspect the equipment for shipping damage.
58 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Install the IDU Install the IDU in a 19" or 23" rack using the screws and brackets shown in Figure 24. The rack needs to conform to EIA-310-D standards. Screw hole spacing in particular, is important. Mount the IDU components in the following order: 1 The power supply plenum 2 The hub chassis 3 The fan assembly plenum Ensure that during installation there is enough room left for future growth.
Chapter 4: Installation Draft: 8/13 PCA Installation When removing a PCA: 1 Turn the top locking screw clockwise. 2 Turn the bottom locking screw counter clockwise. 3 Pull the levers up and pull the PCA out. Install a PCA in reverse order.
60 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Ground the Hub IDU There are two methods for grounding the hub IDU. When the rack is grounded, the hub IDU ground is through the mounting brackets to the rack. When stand-alone, or if the rack is not grounded, use the following procedure: 1 Attach a lug to one end of a 6AWG green stranded wire and secure it to back of the hub IDU at the stud located at the top right of hub IDU (see Figure 26).
Chapter 4: Installation Draft: 8/13 61 Verify the Rack Power 1 Locate the red and black leads on the back of the IDU. Verify that the leads are separated and not touching a grounded location. 2 Connect meter leads using alligator clips or a device that allows you to separate the leads without shorting them together or holding them with your hands. 3 Apply power to the IDU. 4 Verify –48 Vdc ±10% on the battery or power supply.
62 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Connect Power to the Hub IDU Caution ! Verify power is off to the power supply before connecting to the power distribution plenum. 1 Remove the Shelf 2 fuse from the Power Distribution Plenum. 2 Connect red and black leads from power supply after verifying that there is –48Vdc. If you need to extend lead lengths, use 12AWG red and black wire respectively.
Chapter 4: Installation Draft: 8/13 63 Connect the Hub IDU Cabling 1 Connect the Rx cable to far-left side, top Rx connection. 2 Connect the other end of the jumper to a surge protector on the internal ground bar. 3 Connect cabling to the other end of the surge protector to ground on the ODF. 4 Connect cabling from the surge protector to the ODB Rx connector. 5 Repeat the preceding steps for the Tx line. 6 Connect cabling from the ODB output ports (labelled A–F) to the input of each TRA.
64 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Figure 28 IDU Signal Connections
Chapter 4: Installation Draft: 8/13 Figure 29 PTM 1000 IDU Fuse Diagram 65
66 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Power On Self Test (POST) Apply power to the IDU and verify the condition of the lights on the PCAs in sequence during the POST: 1 Initial power on: • MCA PCA – red and green • IMP PCA – red and green • Net PCA – red and green • PSI PCA – red only • IFD PCA – no lights • All the alarm lights 2 The alarm lights extinguish. 3 All red lights extinguish, and all the green lights stay on, including the IFD and PSI PCAs. The POST is complete.
Chapter 4: Installation Draft: 8/13 67 Installing the Remote ODU Indoor use The remote ODU can be mounted indoors with the antenna aimed through a window. The glass will attenuate the signal. The amount of attenuation depends on the type of glass. • Double pane glass, uncoated: 10 dB • Low emission glass: 20 dB The range of the remote unit is reduced when used indoors. If the office glass is low emission glass, the reduction in range may be significant.
68 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Installing the Remote IDU Inspect and verify the equipment: 1 Verify that the equipment and hardware matches the packing list. 2 Inspect the equipment for shipping damage. Install the Remote IDU 1 If rack mounted, install with the brackets and screws provided; otherwise, set on a shelf or desk. Refer to the Site Survey for specific mounting characteristics. 2 Ground the IDU by connecting 12AWG (THHN, green) wire to the mounting brackets.
Chapter 4: Installation Draft: 8/13 69 Remote Antenna Alignment Both the remote IDU and ODU are part of the alignment procedure. At the Remote IDU 1 Verify that the hub is configured. 2 Connect the laptop console to the MCA DB-9 connector on the front panel of the IDU. 3 Start a HyperTerminal session with the following settings: • baud rate 38,000 • 8 data bits • no parity • 1 stop bit • no flow control 4 Type doReg. 5 Type doBchan. 6 Type lockNode.
70 Draft: 8/13 PTM 1000 Operations and Maintenance Manual Figure 30 Remote ODU Adjustment Screws 6 Tighten the azimuth screws, loosen the coarse elevation screw and move until reaching the peak RSSI voltage on the DMM. 7 Loosen the top elevation screw and adjust the fine elevation knob until reaching the peak RSSI voltage on the DMM.
Chapter 4: Installation Draft: 8/13 71 Back at the Remote IDU Caution ! 1 Type alignRemoteAntennaDone. 2 Verify that the airlink reactivates by checking statistics. The operator will see the following text: syncOK=100. 3 Check the RSSI and readjust the alignment if necessary. 4 Verify that the airlink is still active by checking the CTN and RSSI values. 5 Remove the console connector from the DB-9 connector. 6 Disconnect the DMM at the remote ODU, and reinstall the TRA data port cover.
Chapter 5 Testing This chapter to be added at a later date.
