On Tue, Sep 14, 2010 at 9:24 AM, Vincent W <bonj...@yahoo.co.in> wrote: > Hi, > > I'm trying to do some signal reconstruction and in testing and developing a > concept design, I wanted to attenuate a test signal and hook it up directly to > the RX port of my USRP2 through either the Basic RX or LFRX daughter board > (and, > eventually through my WBX board). My intention was to attenuate the signal > through either a resistive attenuator or inductively through a transformer. > > Essentially, I want to temporarily use my USRP2 and boards as an oscilloscope. > I'm very aware that I need to be _really_ careful doing this, as it would be > _very_ easy to break something. > > Theoretically though, provided I can guarantee my signal falls within the > accepted input voltage swing for a given daughter board, there shouldn't be > any > problems. > > A couple of questions then: > > What are the absolute and preferred input voltage ranges for the RX, LFRX, and > WBX boards?
BasicRX or LFRX can take +10dBm (~2Vpp) WBX input power should not exceed -10dBm (~0.2Vpp) > > Has anybody successfully tried this? > > What are the dangers I should be looking out for? > > Are there specific precautions I should be taking? > > What is the best way of attenuating the signal? Mini Circuits makes a line of coaxial attenuators which can be installed in your SMA cabling, we find they work fairly well. I have also found the the North Hills baluns to be very nice, as well as those from Mini Circuits. Jason _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
