On 06/20/2012 05:08 PM, juancolon wrote: > > Hi, > > We have a USRP2 with a LFTX Rev 2.2 daughterboard. When I run a GRC program, > I try to look at the signal with a spectrum analyzer and the signal is not > there. There is no error at all, everything seems to be up and running. The > system is recognizing the USRP2, daughterboard and I have also played around > with the subdev's but everything is correct. > > To make sure there is nothing wrong with the LFTX, I pulled it out from the > USRP2 and installed it on a USRP N210. In the N210 I re-run the same exact > GRC program and finally see the signal at the spectrum analyzer. To confirm > that the USRP2 transmit side is working, I've installed a RFX1800 and re-run > the same GRC program and this also works perfect. >
LFTX and RFX1800 have very different frequency ranges. Perhaps you are not looking in the right frequency range for your signal? LFTX is just a direct line from the DAC, so +/- 30 or so MHz centered about DC. I suggest putting a known signal into the usrp sink and put a scope on the output of the LFTX. If RFX is working, the DAC output should definitely be there. -josh _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
