I am thinking about purchasing a 6400, but wanted to take a look at the NB and NR within the smartsdr prg. I have and I/Q stream I can supply and wanted to see how well the noise blanking and noise reduction features worked, would this be possible?
In the 6000-series FlexRadios, all the processing is done in the radio, NOT in SmartSDR. SmartSDR is only the "front panel" for the radio. The 6400 has a tremendous amount of processing power in that small cabinet! So, no, it is not possible to do what you are asking.