FW: FRS questions

Hi!

Several questions:

I’m new in gnu radio and am trying to implement a prototype of new radio
based on USRP platform. We’re receiving several waveforms in different
frequency bands and we want to incorporate a special functionality, just
as
a demo: The idea is receiving broadcast AM band and retransmit in FRS
band
(FM narrow band in 450 MHz approximately).

Regarding this issue, we have the following questions:

  1.   How can we control side A and side B on the same motherboard in
    

order to receive in side A and retransmit in side B?

  1.   How can we configure FRS functionality in the motherboard and 
    

in
the TxRx 400 card? Which registers and how should be modified?

Thanks in advance

MAB

On Wed, Nov 15, 2006 at 09:47:19PM -0500, MAB wrote:

Regarding this issue, we have the following questions:

  1.   How can we control side A and side B on the same motherboard in
    

order to receive in side A and retransmit in side B?

  1.   How can we configure FRS functionality in the motherboard and in
    

the TxRx 400 card? Which registers and how should be modified?

Thanks in advance

MAB

If you look at pretty much any example in
gnuradio-examples/python/usrp you’ll see how to control a particular
daughterboard. Or look at gnuradio-examples/python/digital. Those
are doing something different WRT modulation, but they can and do open
up different daugtherboards for Rx and Tx.

In your case with the Tx on one side and the Rx on the other, there’s
no particular problem. That’s one rx chain and one tx chain. Look at
how the examples handle the rx and tx subdev command line
specification (the -T and -R command line options).

Eric

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