Anyone know what the allowable gain settings are when using the USRP
with the LFRX daughterboard? I believe I read somewhere that 20 is the
default and units are dB, but what are the min/recommended/max values?
I tried digging them out of usrp1_source_c.cc, usrp1_source_base.cc, and
usrp_standard.cc (all from rel 3.0.3) but had no luck.
GRC seems to default it to 100, but this seems pretty high if the
setting is in dB.