User's Manual

40/346 Issue 01 - April 2001 - Draft 04 3CC12426AAAA TQ BJA 01
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To install an X-Pol RBS Tx or X-Pol RBS Rx on an antenna that is already attached to a mounting plate,
the antenna must be removed from the mounting plate without disturbing the antenna downtilt. See
procedure 6-6 for information on removing an antenna from a mounting bracket.
To attach an X-Pol RBS Tx or X-Pol RBS Rx to an antenna
1. Remove the RF wave guide cover from the X-Pol RBS Tx or X-Pol RBS Rx, and remove the RF wave
guide plug from the antenna. Figure 9 shows the location of the cover and the plug.
Figure 9 – Location of the wave guide plugs and covers
2. Place the radio on a flat surface, with the wave guide facing up.
3. Place the provided O-ring on the O-ring seal seat around the X-Pol RBS Tx or X-Pol RBS Rx RF
wave guide. Ensure that the O-ring remains in place during the remainder of the procedure.
4. Place the antenna on the radio as shown in Figure 10, ensuring that the captive bolts align with their
threaded standoffs. Tighten each of the three captive Hex bolts to 2.37 Nm (21 in.-lb) torque.
Note 1 - Do not remove the shipping caps from the coaxial and RS-442 connectors on the
X-Pol RBS Tx and X-Pol RBS Rx until the BS cables are ready for attachment.
Note 2 - Antenna polarization is specified in cell planning, and cannot be changed without
affecting network performance. Use the appropriate Tx and Rx antenna polarization for X-
Pol RBS Txs and X-Pol RBS Rxs in a given sector, as specified by cell planning activities.
RF wave
guide with
cover removed
O-ring seal
seat
Antenna
RF wave
guide with
plug removed