訊號品質
IBDA_SignalStatistics::get_SignalQuality :
http://msdn.microsoft.com/en-us/library/ms784767

訊號強度
IBDA_SignalStatistics::get_SignalStrength
http://msdn.microsoft.com/en-us/library/ms784768(VS.85).aspx

ITuner::get_SignalStrength :
http://msdn.microsoft.com/en-us/library/ms786859(VS.85).aspx