[Discuss-gnuradio] transmitting gain in usrp sink

[lingeswar kandregula]

hi community,

i wondered how the USRP is transmitting the signal even if i set the transmitting gain to ZERO. and same as the case with receiving section. what does setting gain in USRP sink will do ? and what is this gain referred to? is it just to set the PGA's gain or something different. please help me..

thanks,

lingeswar.