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DDS ad9854 chirp generation

Question asked by Azhar on Jun 7, 2012
Latest reply on Jul 9, 2012 by sitti

Asalam O ALikum

I am trying to generate Linear frequency modulated pulse (LFM) chirp signal from DDS AD9854. The probelm is that the output is not LFM but simple sine wave with exact intial frequency and timing too.

The image shown here are 1kHz PRF and pulse width are 100usec.every thing is ok.but the signal is sine wave and i want chirp.control word is checked tooThe control words and FTW , DFW etc are sent via PIC16F8XX. All control words FTW and DFW,ramprate are exact going to ad9854, but output is a pure sine wave not a chirp signal....What to do with this matter......

Thanks.

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