User's Manual Part 2

March 29, 2006 Part ######A revision 00a-DRAFT 65
Chapter 4: Base Station Installation Procedures
Install the GPS Clock Module
The Global Positioning System (GPS) clock module consists of a 1U module that contains two
plug-in GPS receivers. The GPS clock module requires two GPS antennas. GPS antenna installation is
described on page 92.
NOTE: The GPS clock module is only used in +24V base stations. Base stations
configured for –48V power use clock source cards instead. See “Insert the Radio and
Utility Shelf Cards” on page 75 for information.
 To install the GPS clock module
1 Remove the GPS clock module from its antistatic packaging.
2 If necessary, attach the plug-in modules and the rack-mount brackets to the GPS clock module using the
hardware supplied in the shipping kit.
3 Orient the GPS clock module so that the text on the front panel is right-side up.
4 Slide the GPS clock module into the radio rack directly above the upper cooling unit.
The GPS clock module is located between the Ethernet patch panel and the upper cooling unit.
5 Puncture a hole in the grounding tape for each GPS clock module screw location.
6 Attach the GPS clock module to the rack using four 5/16-inch mounting screws. Torque each screw to 50
inch-pounds.