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[Discuss-gnuradio] Newbie wonders about latency

From: John Sidles
Subject: [Discuss-gnuradio] Newbie wonders about latency
Date: Tue, 28 Dec 2004 14:47:49 -0800

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:


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

    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.

   John Sidles

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