Re: [Discuss-gnuradio] TX/RX Coordination

[Robert Miller]

Ok, so I was able to achieve the functionality I was asking for with the help
of various post responses ("set_auto_tr(), gr_stall, and PTT" and "Problem
with symmetric behavior") .  I am using set_enable( ) to accomplish my goal,
since my data is not packetized (I am simply using tones).  Attached is the
code,  http://www.nabble.com/file/p14987034/Switching.py Switching.py ,
which was produced by modifying usrp_nbfm_ptt.py.  I am currently using a
python timer to perform the switching, and am looking for a way to speed
this up.  (Things only appear to work down to about 10 ms.)  I would ideally
like to do the switching at the microsecond level... does anyone have any
suggestions?  Can I somehow packetize my data and use the auto t/r switching
mode to achieve this level of switching?
Thanks,
Rob



Robert Miller wrote:
> 
> Hello,
> 
> I am having some trouble trying to setup the following experiment.  I have
> a single USRP and 2 RFX-1800 daughterboards and wish to transmit and
> receive between them using only the TX/RX ports.  Since I would like to
> use the same frequency, f1, I would like to time-division multiplex the
> daughterboards in the following manner:
> 
> RFX #1:    TX  RX  TX  RX  TX  RX  .....  TX
> RFX #2:    RX  TX  RX  TX  RX  TX  .....  RX
>                --------------------------------------> time, f1
> 
> Q1)  Is this possible using the USRP and the RFX daughterboards?
> Q2)  If so, can someone provide some pseudo-code for the daughterboard
> setup?  I have read various posts about using the auto_tr feature with the
> RFX boards but am still a bit confused.
> Q3)  How fast can the TX/RX switching occur?
> 
> Thanks in advance for any guidance,
> Rob
> 
> 
> 

-- 
View this message in context: 
http://www.nabble.com/TX-RX-Coordination-tp14518284p14987034.html
Sent from the GnuRadio mailing list archive at Nabble.com.