SI47XX-EVB Datasheet, PDF(110/164 Page) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

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SI47XX-EVB Datasheet, PDF (110/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

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Si47xx-EVB

10. Debugging Guidelines for Si47xx EVB

Table 28. Debugging Guidelines for Si47xx EVB

Mode

Symptom

Configuration EVB not recognized

Initialization

GUI crashes

Receive Audio clicking noise

Receive

Excess interference/

Poor Reception

Receive

Seek/scan doesnât find

expected channels

Seek/scan stops on

noise

FM/WB

Receive

Poor sensitivity from

FM test port

Solution

ï®ï 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

Propertiesï®Hardwareï®Device Manager. Under Human Interface

Devices, select each HID-Compliant Deviceï®âDetails entry and

confirm one contains VID_10C4&PID_8244.

ï®ï 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.

ï®ï If EVB is not recognized by the GUI, uninstall .NET framework 2.0

and reinstall from the installation CD or Microsoftâs website. The

GUI requires .NET Framework 2.0; however, multiple versions

such as 1.1, 2.0, and 3.0 may be installed simultaneously.

ï®ï 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.

ï®ï If the GUI continues to crash, close the GUI, remove the GUI from

Control Panelï®Add or Remove Programs, and then delete the GUI

directory. Launch the GUI and try again.

ï®ï Disable "Update" under the "Control" menu (disables continuous

GUI/Si47xx updates).

ï®ï If using a laptop, ensure it is running off the battery and not plugged

in to the ac mains.

ï®ï Alternatively, disconnect from the host PC and run from battery

power.

ï®ï Move to a stronger signal environment.

ï®ï Adjust Seek SNR and Seek RSSI thresholds downwards.

ï®ï Verify band and channel spacing for the region.

ï®ï Adjust Seek SNR and Seek RSSI thresholds upwards.

ï®ï If using a laptop, ensure it is running off the battery and not plugged

in to the ac mains.

ï®ï Remove ac coupling cap from the headphone input path to

eliminate possible sources of interference.

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Rev. 0.8

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