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AD9361官方NO-OS代码配置,急

在官方给的demo里可以发送正弦波,但是波的频率和带宽应该怎么设置呢,

2400000000UL, //rx_synthesizer_frequency_hz *** adi,rx-synthesizer-frequency-hz
2400000000UL, //tx_synthesizer_frequency_hz *** adi,tx-synthesizer-frequency-hz

case DATA_SEL_DDS:
dds_default_setup(phy, DDS_CHAN_TX1_I_F1, 0, 10000000, 250000);
dds_default_setup(phy, DDS_CHAN_TX1_I_F2, 0, 10000000, 250000);
dds_default_setup(phy, DDS_CHAN_TX1_Q_F1, 0, 10000000, 250000);
dds_default_setup(phy, DDS_CHAN_TX1_Q_F2, 0, 10000000, 250000);

两种对频率的设置方式应该怎么理解

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