Hi,
      I have some problems with my experiment.
What I want to do is described as follows.

   USRP1(device1)         USRP1(device2)
   +------------+         +------------+
   |            | @450MHz |            |

   |            | data    |db1:        |
   | db1:        -------->   FLEX400(A)|

   | FLEX400(A)  <--------             |

   |            | data ack|            |

   |            |         |            |

   |            |         |            |
   |db2:        |  data   |db2:        |
   | FLEX400(B)  --------> FLEX400(B)  |
   |             <--------             |

   |            | data ack|            |

   +------------+ @470MHz +------------+


Now I have two USRP1.

Each of them is equipped with two RFX400 daughterboards.


And I hope that device1's A can communicate with device2's A at 450MHz, and

device1's B can communicate with device2's B at 470MHz.


For example, device1's A sends data to device2's A ,and when device2's
A receives the data, it will send

an ack back. Finally device1's A will receive the ack from device2.

The same thing will happen in B boards at the same time, but in
different frequency. Also B boards will send

different data from A boards.

So every daughterboard has the capability to transmit and receive payload.


My first qusetion------------>Is this possible to implement on
USRP1????????????



If it is possible, can I solve it by the following way?


Now I try to create new txpath and rxpath under the top block to solve
the problem.

###########################################################################

#for db1

 self.txpath = usrp_transmit_path.usrp_transmit_path(mod_class, options)

 self.rxpath = owl_rxpath.usrp_receive_path(demod_class, callback, options)

#create new txpath and rxpath for db2

 self.txpath2 = usrp_transmit_path.usrp_transmit_path(mod_class, options2)

 self.rxpath2 = owl_rxpath.usrp_receive_path(demod_class, callback, options2)

##############################################################################

And I will create new source and sink for db2.

My second qusetion------------>Is that a possible way to solve the problem?

If it's not or there is any better

way to solve this problem, please tell me.


Thanks for help!
I just really want to know the answers.


Candy
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