Forum: GNU Radio Zeroing out packets at RX2 if transmitted by own RFX900's TX/RX

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Amy Kumar (Guest)
on 2013-08-10 23:13
(Received via mailing list)

My goal is that when the USRP N200 R4 is transmitting packets, the
antenna on it's own daughterboard should not receive the transmitted

For this, I am trying to zero out the samples of packets(GMSK) received
the RX2 antenna (on RFX900 daughterboard ) precisely for the duration of
time when the TX/RX antenna is transmitting packets, by modifying the

There are certain subtle points I need to take care of:

1) My understanding is that 'tx_run' will give a '1' for the time
between 'sob' and 'eob' as encountered by the FPGA.
Am I right or wrong ?

2) If I try to zero out the incoming received samples at RX2 during this
duration(when tx_run=1), it will not solve the purpose because the time
when the packet/signal is actually transmitted in air by the TX/RX
by that time the zeroing out at RX2 would have stopped (as tx_run is no
longer '1').
Am I right or wrong ?

What would be the best way to do this?
Any suggestions would be appreciated.

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