[Discuss-gnuradio] Newbie wonders about latency

[John Sidles]

Dear GnuRadio folks

We at the University of Washington are quite interested
to apply the Gnu Universal Software Radio Peripheral (USRP)
as a nanomechanical device controller:

   http://www.gnu.org/software/gnuradio/doc/exploring-gnuradio.html#usrp

Basically, our task is to observe the complex amplitude
of a MHz-carrier nanomechanical oscillator, then apply a
controlling force that damps thermal oscillations.

For this to work, the phase lag of the USRP processing
chain


    analog in ->
      Rx daughterboard ->
               linear filter ->
                    Tx daughterboard ->
                                  analog out


should be no more than about 100 microseconds.
Is this kind of latency achievable?

Any advice you folks can give us would be *very* welcome.

   Sincerely
   John Sidles
   http://courses.washington.edu/goodall/MRFM/