test gpib_hp1631d protocol-decoder gpib channel dio1=0 channel dio2=1 channel dio3=2 channel dio4=3 channel dio5=4 channel dio6=5 channel dio7=6 channel dio8=7 channel eoi=8 channel dav=9 channel nrfd=10 channel ndac=11 channel ifc=12 channel srq=13 channel atn=14 channel ren=15 input gpib/hp1631d/gpib_hp1631d.sr output gpib annotation match gpib_hp1631d.output