[Discuss-gnuradio] USRP2 with Basic Tx Daugther board io_tx pins monitoring

[Leonard Marziliano]

Hi,

I want to monitor the I and Q samples being send over to the AD9777 DAC 
(channel 1). I've noticed on the USRP2 schematic that the FPGA provides 
io_tx[0:15] pins which are routed on the daughter board for probing (I 
use the Basic Tx daugther board). Now, when I run the tx_samples app 
example to transmit sample (using a file read continuously) I get the 
signal to the sma connector alright but if I probe the io_tx pins, I get 
nothing.

The main question will be, is it possible for these pins to provide the 
same values send to the DAC ? Is there a special configuration or 
command that needs to be send to the FPGA to make these pins do what I 
want or  something else needs to be done ?

Thanks,
Leonard

--
Léonard Marziliano, Research Engineer

Communications Research Centre Canada (CRC)
3701 Carling, Ottawa, CANADA K2H 8S2
Tel: (613) 993-0578
Fax: (613) 990-0316
http://www.crc.gc.ca