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Si47xx-EVB
10. Debugging Guidelines for Si47xx EVB
Table 28. Debugging Guidelines for Si47xx EVB
Mode
Symptom
Solution
Configuration
EVB not recognized
?? If
the EVB is not recognized by the PC, remove the USB
connection and reconnect. Ensure the EVB is recognized by the
PC by right-clicking on My Computer and selecting
Properties ? Hardware ? Device Manager. Under Human Interface
Devices, select each HID-Compliant Device ? “Details entry and
confirm one contains VID_10C4&PID_8244.
?? IF the EVB is not recognized by the GUI, but is recognized by the
PC, it is likely that another process has erroneously acquired the
handle to the EVB. Two processes known to cause this issue are
lxhidsve.exe and EAUSBKBD.exe. Terminate these processes in
the Task Manager.
?? If EVB is not recognized by the GUI, uninstall .NET framework 2.0
and reinstall from the installation CD or Microsoft’s website. The
GUI requires .NET Framework 2.0; however, multiple versions
such as 1.1, 2.0, and 3.0 may be installed simultaneously.
Initialization
GUI crashes
?? The
GUI may crash if a previous GUI .ini file was not removed
properly. Close the GUI, and delete all .ini files from the GUI
directory. Launch the GUI and try again.
?? If the GUI continues to crash, close the GUI, remove the GUI from
Control Panel ? Add or Remove Programs, and then delete the GUI
directory. Launch the GUI and try again.
Receive
Audio clicking noise
?? Disable
"Update" under the "Control" menu (disables continuous
GUI/Si47xx updates).
Receive
Excess interference/
?? If
using a laptop, ensure it is running off the battery and not plugged
Poor Reception
in to the ac mains.
?? Alternatively, disconnect from the host PC and run from battery
power.
?? Move to a stronger signal environment.
Receive
Receive
Seek/scan doesn’t find
expected channels
Seek/scan stops on
?? Adjust
?? Verify
?? Adjust
Seek SNR and Seek RSSI thresholds downwards.
band and channel spacing for the region.
Seek SNR and Seek RSSI thresholds upwards.
noise
?? If
using a laptop, ensure it is running off the battery and not plugged
in to the ac mains.
FM/WB
Poor sensitivity from
?? Remove
ac coupling cap from the headphone input path to
Receive
110
FM test port
eliminate possible sources of interference.
Rev. 0.8
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