Troubleshooting The Gps Bb; Troubleshooting Flowchart - Nokia RH-3 Series Troubleshooting - Gps

CCS Technical Documentation
RF
RHCP
SA
SPS
UTC
WB

Troubleshooting the GPS BB

To troubleshoot the GPS BB, put the GPS engine (GE) and cellular engine (CE) in the
proper mode by selecting the GPS Testing drop-down menu item from the "Troubleshoot-
ing" dialog box. Ensure that the necessary inputs from the CE are good (e.g., power, clock,
and so on). Next, ensure that these inputs produce the proper outputs. Due to the large
level of integration (most functionality is contained in the two ASIC chips), the diagnos-
tics that may be performed are limited.
Visually inspect the GPS circuitry to determine if the problem is physical (dislodged parts,
corrosion, poor solder joints, and so on) prior to performing any diagnostics.

Troubleshooting Flowchart

Before implementing the flowchart, turn the GPS section ON in the "GPS Receiver Con-
trol (AMS)" tab of the GPS component in Phoenix.
Reference Table 1 for GPS Test Points assignment and Figure 10 for GPS Test
Points locations.
Issue 1 06/2003
Radio Frequency
Right Hand Circular Polarized
Selective Availability
Standard Positioning Service
Universal Time Coordinated
Wideband
Figure 2: GPS RF-BB ASIC Interface
Nokia Corporation
Troubleshooting — GPS
Confidential
RH-3
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