|Microsoft DirectX 9.0|
The put_SymbolRate method sets the QPSK symbol rate.
HRESULT put_SymbolRate( long Rate );
[in] Variable of type long that specifies the QPSK symbol rate.
Returns S_OK if successful. If the method fails, error information can be retrieved using the standard COM IErrorInfo interface.
QPSK modulates symbols onto the RF signal. These symbols are detected by the demodulator and used to reconstruct a bit stream. QPSK allows the rate at which symbols are (de)modulated to be changed.