For reference these are my capture settings
`bb_api.bbConfigureCenterSpan(id, 70000000, 4.0e6); //center hz, span hz
bb_api.bbConfigureLevel(id, -20.0, bb_api.BB_AUTO_ATTEN);
bb_api.bbConfigureGain(id, bb_api.BB_AUTO_GAIN);
bb_api.bbConfigureIQ(id, bb_api.BB_MIN_DECIMATION, 4.0e6); //bandwidth hz
