Antenna Captive bolt (hidden) O-ring X-Pol RBS TX X-Pol RBS Rx Captive bolts Figure 10 – Antenna, X-Pol RBS Tx/X-Pol RBS Rx and captive bolts 5. As shown in Figure 11, place a lock washer and a flat washer on each of the four RF wave guide screws, and insert and tighten each of the four screws to 0.56 Nm (5 in.-lb) torque. Antenna RF wave guide screw Lock washer Flat washer X-Pol RBS Tx X-Pol RBS Rx Figure 11 – Installing the RF wave guide screws 6.
.5.3 – Attaching a mounting plate and antenna to a pole The following parts are required: – an antennna with an attached X-Pol RBS Tx or X-Pol RBS Rx, – a single-antenna mounting plate and mounting hardware (provided with the antenna), or a dualantenna mounting plate and mounting hardware (part number 90-7385-02). The BS mounting hardware is composed of the following: – downtilt adjustment screws, – flat washers, – lock washers, – antenna bolts, – U-bolts and U-bolt brackets, – 17 mm nuts.
Screw bracket Downtilt adjustment screw U-bolt U-bolt bracket Flat washer Lock Nut washer Mounting plate Mounting pole Figure 12 – Connecting the mounting plate to the pole 2. Connect the antenna to the mounting plate, as shown in Figure 13.
Nut Lock washer Flat washer Spacer Antenna bolt Spacer Antenna 10mm (3/4 in.) Nut Flat washer Lock washer Antenna bolt and nut Figure 13 – Connecting the antenna to the mounting plate 1. Thread a nut roughly 10 mm (3/4 in.) onto each of the two antenna bolts. 2.
Antenna bolt and nut Lock washer Flat washer Spacer Antenna 1 Antenna 2 Figure 14 – Mounting a second antenna 1. Thread a nut roughly 10 mm (3/4 in.) onto each of the two antenna bolts. 2. Connect the top of the antenna to the top of the mounting plate by inserting one of the antenna bolts through a lock washer, a flat washer, mounting plate antenna bolt channel, the adjustment screw plate, a spacer and the upper antenna bolt hole.
5. Connect the remaining end of the ground conductor to a suitable lightning discharge ground, using a mechanical connection method that is approved by local electrical authorities. X-Pol RBS Tx X-Pol RBS Rx Washer Bolt Circular lug X-Pol RBS Tx X-Pol RBS Rx Ground wire To ground Antenna Figure 15 – X-Pol RBS Tx/X-Pol RBS Rx ground connection location To adjust the antenna downtilt The antenna downtilt is adjusted to optimize cell performance.
X-Pol RBS Tx BTS Area of service coverage Figure 16 – Minimal downtilt Downtilt adjustment screw Area of service coverage Figure 17 – Increased downtilt 3CC12426AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 47/346 104
1. Place a digital level on the top of the X-Pol RBS Tx or X-Pol RBS Rx antenna (see Figure 18). 2. Loosen the two antenna bolts to allow free movement of the antenna. 3. While observing the digital level, adjust the downtilt adjustment screw (see Figure 18) until the downtilt meets the angle required by cell planning analysis. Antenna bolt Digital level Antenna downtilt adjustment screw Pole Antenna bolt Figure 18 – Antenna downtilt adjustment screw 4. Tighten the two antenna bolts to 54.4 Nm, ± 2.
2. Remove the antenna from the pole: 1. If an X-Pol RBS Tx or X-Pol RBS Rx is attached to the antenna, disconnect all IF and RS-422 cable connectors from the X-Pol RBS Tx or X-Pol RBS Rx, and seal the cable connector ends using butyl tape. Label the IF and RS-422 cables so that they are easily identified when the X-Pol RBS Tx or XPol RBS Rx is reattached, and secure them to the mounting pole.
DC OUT Surge protector DC IN Bias-T RF IN Figure 19 – Connecting the surge protector 2. Place the 12:2 Combiner/Splitter assembly in a permanent location near the MainStreetXpress 36170 shelf, within reach of the SMA cables that connect between the IBS card and the 12:2 Combiner/Splitter. 3. Position the Bias-T RF IN connector on one of the two Combiner/Splitter Primary/Redundant radio connectors, as shown in Figure 20. 4.
To connect the surge protector ground wire 1. Measure a length of insulated copper wire that is long enough to run from the closest safety ground point to the surge protector. 2. Add a ring lug to one end of the ground wire, and connect it to the surge protector, as shown in Figure 21. Ring lug Washer Surge protector Ground screw Ground wire Figure 21 – Surge protector ground connection 3. Connect the unconnected end of the ground wire to the building ground. 2.6.
step 4. Screw cap Figure 22 – Screw cap 4. Replace the gas discharge tube; see Figure 23. 1. Hold the screw cap upside down. 2. Place the discharge tube in the cap. 3. Position the surge protector over the screw cap. 4. Screw the cap into the surge protector as far as possible by hand, then tighten the cap with the screwdriver. Gas discharge tube Screw cap Figure 23 – Replacing a gas discharge tube in a surge protector 5. Connect the surge protector to the Bias-T. 6.
Type N mounting bracket 3/8 in. bronze bolt Copper grounding plate Bronze lock washer Copper washer 3/8 in. bronze nut Figure 24 – Attach the mounting brackets to the copper grounding plate 2. Install each lightning arrester in a mounting bracket, as shown in Figure 25. Washer Mounting bracket Nut Type N lightning arrester Copper grounding plate Figure 25 – Connecting the lightning arrester to the adapter bracket 3. Connect the IF cables to the lightning arrester, as shown in Figure 26.
Type N lightning arrester Broadband cable Mounting bracket Copper grounding plate Figure 26 – Installed and connected lightning arrester Replacing the gas discharge tube in a Type N lightning arrester The gas discharge tube should be replaced by qualified service personnel on a regular basis as recommended by the manufacturer, using an exact replacement from the original manufacturer. The lightning arrester carries –48 V dc that must be turned off before replacement.
3. Inspect the lightning arrester for damage. If there is damage, replace the lightning arrester (see section 8.1); if not, proceed to step 4. 4. Replace the gas discharge tube; see Figure 28. 1. Use the pliers to pull the discharge tube out of the cap. 2. Push the replacement discharge tube into the cap. 3. Screw the cap into the lightning arrester by hand, then tighten the cap with the wrench. 5. Apply the dc power.
Figure 29 – Non-redundant X-Pol RBS Tx/X-Pol RBS Rx BS components and cables 56/346 104 Issue 01 - April 2001 - Draft 04 3CC12426AAAA TQ BJA 01
Figure 30 – Redundant X-Pol RBS Tx/X-Pol RBS Rx BS synchronization cables 3CC12426AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 57/346 104
Cable rating Description Connectors Recommended cables Indoor IBS-TLX connector to RS-422 lightning arrester RJ45(1) - RJ45(1) Delco 398087P Outdoor RS-422 lightning arrester to XPol RBS Tx/X-Pol RBS Rx RJ45(1) - LEMO(2) Delco 398087 Table 14: RS-422 data cables and connectors Note: Alcatel part number 90-6815-01 (Stewart RJ45 connector) LEMO USA part number FGG.1K.304.CLCC.60Z (connector strain relief part number GMA.1B.065.
2.8.1 – Selecting BS IF cables When selecting BS IF cables, the main concern is the IF cable signal loss of the indoor and outdoor cable runs. The system requires that all the components in the IF signal path between the IBS card and the X-Pol RBS Tx/X-Pol RBS Rx (cables, connectors and equipment) provide a fixed decibel loss in each of the downstream and upstream directions. System performance may be affected if the fixed loss is not met.
where Losstotal is the loss of the IF cable run in dB/100 m (dB/100 ft) Lossi is the loss of the indoor-rated cable (in dB) Losso is the loss of the outdoor-rated cable (in dB) Lossi connector is the loss of the indoor cable connector (in dB) Losso connector is the loss of the outdoor cable connector (in dB) After all components have been installed and connected, system loss measurements and calibration must be made to determine the actual losses.
Connector Loss (dB/100 m [dB/100 ft]) Cable type Rating Type Loss (dB) Downstream (1) Upstream (2) Indoor Heliax FSJ1-50A F1PNM 0.05 29.03 (8.85) 18.59 (5.66) Indoor Heliax FSJ2-50 F2PNM 0.05 19.99 (6.09) 12.65 (3.86) Indoor Heliax FSJ4-50 BF4PNM 0.05 17.76 (5.39) 11.07 (3.38) Indoor Heliax HL4-RP-50 H4PNM 0.08 12.22 (3.91) 8.24 (2.51) Indoor/plenum Heliax HJ5-50 H5PNM 0.08 6.07 (1.88) 3.92 (1.19) Indoor/plenum Times Microwave LMR-400 Ultra Flex TC-400-NMH 0.10 23.
Electrical tape attribute Description Name 35 Scotch Brand vinyl electrical tape for color coding Thickness 0.18 mm (7 mil) Width 19 mm (31/44 in.) Colors Blue, green, red, white, yellow Manufacturer 3M Electrical Products Division Telephone: 1-800-245-3573 http://www.3m.com/elpd/ Ordering code 35 Blue (UPC# 10836) 35 Red (UPC# 10810) 35 Green (UPC# 10851) 35 Yellow (UPC# 10844) 35 White (UPC# 10828) Standards requirements UL 510, CSA standard C22.
Sector Sector C Sector D X-Pol RBS Tx or X-Pol RBS Rx number Number and color of bands (primary X-Pol RBS Tx or X-Pol RBS Rx) Number and color of bands (Redundant X-Pol RBS Tx or X-Pol RBS Rx) X-Pol RBS Tx #1 1 green band 1 green band, 1 white band X-Pol RBS Rx #1 2 green bands 2 green bands, 1 white band X-Pol RBS Tx #2 3 green bands 3 green bands, 1 white band X-Pol RBS Rx #2 4 green bands 4 green bands, 1 white band X-Pol RBS Tx #n 2n-1 (1) green bands 2n-1 (1) green bands, 1 white ban
– where a cable connects to the lightning arrester, – where a cable connects to the X-Pol RBS Tx or X-Pol RBS Rx jumper cable. Cables may be marked for identification at additional points along their lengths, however, always leave a space of at least 1 meter (3.28 ft) between groups of identification bands on the same cable. To mark an IF cable for identification 1. Use Table 22 to calculate the correct number and color of bands to be applied to the IF cable. 2.
To provide cable strain relief For each RS-422 or IF cable that connects to an X-Pol RBS Tx, X-Pol RBS Rx or 2:1 Combiner/Splitter: 1. Position the cable against the pole as close as possible to the X-Pol RBS Tx, X-Pol RBS Rx or 2:1 Combiner/Splitter connector.
5. After the cable run has been tested for signal losses, connect the IF jumper cable to the X-Pol RBS Tx or X-Pol RBS Rx. To connect the indoor IF cables For each X-Pol RBS Tx and X-Pol RBS Rx: 1. Cut a length of indoor IF cable long enough to reach and connect the protected side of the RS-422 lightning arrester to the Bias-T. 2. Attach an N(M) connector to each end of the cable. 3. Run the cable between the RS-422 lightning arrester and the Bias-T. Secure the cable. 4.
Table 23 describes the requirements for both non-redundant and redundant X-Pol RBS Tx/X-Pol RBS Rx synchronization reference cable configurations. Table 24 lists the cables and connectors recommended for use as synchronization reference cables. If the listed cable types are unavailable, the same cable type that is used to connect the X-Pol RBS Txs and X-Pol RBS Rxs to the lightning arresters may be used, with connectors appropriate for that cable type.
To connect synchronization reference cables (redundant X-Pol RBS Tx/X-Pol RBS Rx) Using a metal hose clamp, attach a 2:1 Combiner/Splitter to the X-Pol RBS Tx pole under the X-Pol RBS Tx/R-X-Pol RBS Tx pair; see Figure 33. 1. Using a metal hose clamp, attach a 2:1 Combiner/Splitter to the X-Pol RBS Rx pole under the XPol RBS Rx/R-X-Pol RBS Rx pair. 2.
Note 1 - Attaching a LEMO connector to the outdoor IF cable is an intricate procedure that should not be done outdoors. Note 2 - There are two pairs of conductors in the RS-422 data cable: one pair has a blue wire and a white wire; the other pair has an orange wire and a white wire. To distinguish the white wires from each other, use a permanent marker to mark the white wire of the blue-white pair. 3.
Note - There are two pairs of conductors in the RS-422 data cable: one pair has a blue wire and a white wire; the other pair has an orange wire and a white wire. To distinguish the white wires from each other, use a permanent marker to mark the white wire of the blue-white pair. 3. Test the cable for pin-to-pin continuity. 4. Connect one end of the cable to the IBS (X-Pol RBS Tx or X-Pol RBS Rx connector, as appropriate), and the other end of the cable to the protected side of the RS-422 lightning arrester.
1. Connect one end of an SMA cable to the Tx connector on the IBS card faceplate. 2. Connect the other end of the same SMA cable to connector 1 on the Tx 12:2 Combiner/Splitter. 3. Connect one end of another SMA cable to the Rx connector on the IBS card faceplate. 4. Connect the other end of the same SMA cable to connector 1 on the Rx 12:2 Combiner/Splitter. 5.
3. Connect the ground wire to the ground terminal of the distribution system. 4. Ensure that the dc power supply is turned off and connect the Bias-T power cable BNC connector to the surge protector. 2.8.8 – Installing an RJ45 connector on an RS-422 cable This section describes how to install a Stewart RJ45 connector on a Delco cable, using Stewart tools. It can also be used as a guideline for installing other manufacturers’ connectors and cables.
make contact with the ferrule when the ferrule is slipped over the cable; see Figure 38. 4. Slip the ferrule over the braided shielding, ensuring that the rounded edge of the ferrule points toward the trimmed end of the cable; see Figure 38a. Leave 1 mm (1/32 in.) of shielding showing; see Figure 38b. Ensure that there is good contact between the ferrule, the shielding and the drain wire. Braided shielding Aluminum mylar shielding a. Ferrule Drain wire Rounded edge b. 1 mm (1/32 in.
Excess shield and drain wire Conductors do not overlap Figure 39 – Preparing the conductors for crimping 6. Insert the ferrule into the ferrule crimping tool, using the proper crimp insert in the crimping tool. 7. Crimp the ferrule such that the crimp wings are parallel to the row of conductors; see Figure 40. Caution - Failure to crimp the ferrule prevents the RJ45 connector from assembling properly. Consequently, the connector may not fit properly into the lightning arrester or IBS.
Management bar Pin 2 Tx+ (W[Blu]) Pin 1 Tx- Blu Pin 8 Rx- (W[O] Pin 7 Rx+ (O) Figure 41 – Inserting the conductors into the management bar Pin Signal RJ45 connector LEMO connector 1 3 Tx- 2 1 Tx+ 7 2 Rx+ 8 4 Rx- Table 25 RS-422 cable pin and signal assignments 10. Slide the management bar towards the cable jacket until there is no more than 4 mm (0.15 in.) between the bar and the jacket; see Figure 42.
4 mm (0.15 in.) 6 mm (0.25 in.) Figure 42 – Positioning the management bar 11. Prepare the conductors for insertion into the RJ45 plug. 1. Trim all the conductors so that they extend from the management bar by 6 mm (0.25 in.); see Figure 42. 2. Pull the management bar to the ends of the conductors, as shown in Figure 43. Figure 43 – Preparing the conductors for insertion into the RJ45 connector 12. Insert the management bar (with conductors and ferrule) into the RJ45 plug; see Figure 44.
Housing Pin 1 RJ45 plug RJ45 plug contacts Notch Pin 1 Pin 8 Release clip Pin 8 Figure 44 – Inserting the management bar into the RJ45 connector 13. Insert the RJ45 connector assembly into the RJ45 crimping tool with the appropriate termination die set. Crimp the connector in order to terminate the conductors; when the conductors are terminated, they make contact with the appropriate pins.
– wire cutter, – wire stripper, – permanent marker, – ruler (metric and imperial distances). Improper crimping or damaged connectors may result if tools other than the specified tools are used. To install a LEMO connector Caution - The Delco cable has two pairs of conductors and each pair has a white conductor. It is possible to get the white conductors mixed up if one of the conductors is not properly marked and identified. 1. Identify all parts of the LEMO connector; see Figure 45. 1 1. Connector body 2.
Sealing gland Metal washer Collet nut Collet Bend relief 50 mm (2 in.) Bevel side Figure 46 – LEMO connector installation 4. Strip off the braided shielding to expose the aluminum-mylar shielding. Leave 4 mm (0.16 in.) of braided shielding; see Figure 47. Jacket Braid 4 mm (0.16 in.) Figure 47 – Exposing the shielding 5. Fit the cone washer over the braided shielding until it reaches the cable jacket. The bevelled edge on the cone should face toward the exposed wires; see Figure 48. 1.
Note - The shielding provides strain relief when it is pressed between the cone washer and the insert. Trim braid at bevel 16 mm (0.64 in.) Figure 49 – Trimming the braided shielding 7. Cut all the wires to a length of 16 mm (0.64 in.); see Figure 49. 8. Strip 8 mm (0.32 in.) of insulator from each wire (see Figure 50a), being careful not to damage any strands, and ensuring that the white wire of the white-blue pair will still be marked after stripping it. Tin each conductor with high-quality solder.
