Using REF in to generate FMCW on USRP?

[sujeetmp]

Is it possible to generate Frequency chirp on NI USRP 2922 with bandwidth greater than 40 Hz by sweeping LO frequency externally?

[lcgse88]

Hi,

I don't see any problem in generating a Frequency chirp using the USRP, I found  this forum interaction that might be helpful for you(NI Forum). Also check this information about generating a Chirp Signal (Here0).

[sujeetmp]

Thanks for your reply. I want to generate chirp with BW greater than USRP TX bandwidth of 40 MHz. Is there a way?

[ErikL]

FM is a more straight forward waveform. You may be able to use a Fgen, DAC, or USRP for the message and build a circuit for the modulation.

The other option is to get a USRP with a wider bandwidth. 🙂
We just releasd 120 MHz bandwidth versions of USRP RIO. Is that wide enough?

[ErikL]

The Quicksyn may be a better option for Generating a chirp. http://ni-microwavecomponents.com/quicksyn