What is the oldest version of SmartSDR which can be downloaded to the 6400M/6600M radios for stand alone use which works?
Will 2.0.17 be functional and downloadable to the rigs?
How about version 1.x.xx's? Where people say the ANF worked better than it does now?
Same with "NR" and "NB", I run the "NR" here about 2 to 3, You can find a sweet spot for your location for these settings but just start LOW and only use them when you need them.
I don't think there has been a change in the DSP Filters that I have noticed for quite a while in the release notes or using the Radio so even if it did work with the 6400 / 6600 I don't think you would find much difference in the DSP Filtering in the older versions.