User Guide

CC Technical Documentation Troubleshooting - Baseband

RM-11

Figure 38: GPS block diagram

The basic GPS BB troubleshooting method is to put the GE and CE in the proper mode

and check to make sure that necessary inputs from the CE are good (power, clock, etc.).

Then, ensure that these inputs produce the proper outputs. Because of the large level of

integration (most functionality is contained in the two ASIC chips), the amount of diag-

nostics one is able to do is limited.

Prior to performing diagnostics, perform a visual inspection on the GPS circuitry to see if

the problem is physical (dislodged parts, corrosion, poor solder joints, etc.)