Hi all-
can anybody explain why the USRP/ LF_RX would seem to introduce a DC bias
or offset to a signal generated by a function generator? I have a
function generator configured to produce a 1 kHz .1 V P-P signal into a 50
Ohm load. I have a Lecroy digital oscilloscope configured with the input
at high-impedance to monitor the signal. When I connect the signal to the
USRP, I see the trace on the Lecroy gets shifted UP by about .06 volts, ie
I have to add a -0.06 V offset at the function generator to zero the bias.
Oddly enough, usrp_oscope.py doesn't show any DC bias whatsoever,
regardless of what offset I put into the function generator. Maybe it's
removed inside the flow-graph?
Any thoughts on either of these questions?
thanks.
eric
************************************
Eric H. Matlis, Ph.D.
Aerospace & Mechanical Engineering Dept.
120 Hessert Center for Aerospace Research
University of Notre Dame
Notre Dame, IN 46556-5684
Phone: (574) 631-6054
Fax: (574) 631-8355
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
