Per Zetterberg wrote:
Hi All,I connected the DAC of the USRP directly to the ADC (basic db, 50ohm cable), 2MHz sample-rate. The impulse responses I get are: h1=[0,-2,2,-7,8,-6,314,479,-47,-161,-124,-103,-79,-63,-50,-39,-29,-23,-17,-1 4,-13,-9,-7,-5,-4,-3,-3,-2,-1,-3,-3]; h2=[0,-1,-1,0,-2,2,22,274,208,-77,-79,-71,-53,-46,-36,-28,-23,-17,-15,-12,-1 0,-7,-5,-4,-4,-3,-4,-2,-2,-2,-1,-2]; Where h1 is with "set_adc_buffer_bypass" and h2 without it. Does this make sense ?
Yes, this looks reasonable. You are seeing a hole at DC because of the low frequency cutoff of the transformers. If you used the LFRX and LFTX instead of the BasicRX and BasicTX, you wouldn't see the hole there.
Matt _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
