Change the frequency while the echotimer is running about gr-radar HOT 4 CLOSED

@IMchanging I'm sure this is quite late as a response, but retuning a USRP will result in a new phase offset between TX and RX. With some USRPs this offset will be the same every time for a given frequency.

from gr-radar.

@IMchanging I'm sure this is quite late as a response, but retuning a USRP will result in a new phase offset between TX and RX. With some USRPs this offset will be the same every time for a given frequency.

So kind of you,Thanks for your response! I have solve the phase problem by using 2 RX channals.
However I found changing the center freq takes times to wait LO stable. And how can I reduce this time consumption as much as possible?

from gr-radar.

That depends a lot on the different USRPs and daughterboards. In many cases there's not much to do, the LO takes however long to stabilize. If you are retuning at known time intervals you could modify the echotimer code to used timed commands for tuning though which removes the delay from issuing the tune command until the tune actually starts (USB/network delays, C++ scheduling, etc).

from gr-radar.

That depends a lot on the different USRPs and daughterboards. In many cases there's not much to do, the LO takes however long to stabilize. If you are retuning at known time intervals you could modify the echotimer code to used timed commands for tuning though which removes the delay from issuing the tune command until the tune actually starts (USB/network delays, C++ scheduling, etc).

I truly appreciate your help in resolving my problem！Thanks a lot！

from gr-radar.