The SDK version is PS5000asdk_r10_5_0_32

Good question. I'm using the PS5000 functions Open, Settings and Rapid. I can't see any options for setting the resolution in these functions, and haven't therefore explicitly set the resolution. I assumed the default resolution was 8-bit, but if it wasn't it would explain the lower allowed maximum ...

I've started writing a labview (2013) program for a 5444B, but I'm stuck with understanding the timebase. Using PS5000 block, the lowest timebase I can use is 2 - i.e. 250MS/s. I've disabled channels B,C and D using PS5000 settings, but an error is still thrown up if I reduce timebase to less than 2...